583 results on '"WEN‑HUI WANG"'
Search Results
2. Developmental characteristics of aggregated lymphoid nodules area in the abomasum of fetal Bactrian camels (Camelus bactrianus)
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Jia Lu, Yu-jiao Cheng, Xiao-hong Xu, Lin-jiang Zhang, Zhi-hua Chen, Lei Liu, and Wen-hui Wang
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Abomasum ,Aggregated lymphoid nodules area (ALNA) ,Fetal Bactrian camels ,Developmental characteristics ,Veterinary medicine ,SF600-1100 - Abstract
Abstract Background Bactrian camel is one of the important economic animals in northwest China. They live in arid desert, and their gestation period is about 13 months, which is longer than other ruminants (such as cattle and sheep). The harsh living conditions have made its unique histological characteristics a research focus. Aggregated lymphoid nodules area (ALNA) in the abomasum of Bactrian camels, as one of the most important sites for the induction of the immune response, provide a comprehensive and effective protective role for the organism, and their lack of information will affect the feeding management, reproduction and epidemic prevention of Bactrian camels. In this study, the histological characteristics of the fetal ALNA in the abomasum of Bactrian camels at different developmental gestation have been described by using light microscopy and histology . Results The ALNA in the abomasum of the Chinese Alashan Bactrian camel is a special immune structure that was first discovered and reported by Wen-hui Wang. To further establish the developmental characteristics of this special structure in the embryonic stage, the abomasum ALNA of 8 fetuses of Alashan Bactrian camels with different gestational ages (5~13 months) were observed and studied by anatomy and histology. The results showed that the aggregation of reticular epithelial cells (RECs) surrounded by a very small number of lymphoid cells was detected for the first time in the abomasum of fetal camel at 5 months gestation, which was presumed to be primitive ALNA. At 7 months gestation, the reticular mucosal folds region (RMFR) appeared, but the longitudinal mucosal folds region (LMFR) was not significant, and histological observations showed that there were diffusely distributed lymphocytes around the RECs. At 10months gestation, RMFR and LMFR were clearly visible, lymphoid follicles appeared in histological observation, lymphocytes proliferated vigorously. By 13 months, the volume of lymphoid follicles increased, forming the subepithelial dome (SED), and there was a primitive interfollicular area between the lymphoid follicles, which contained high endothelial vein (HEV), but no germinal center (GC) was found. In summary, ALNA of Bactrian camels is not fully mature before birth. Conclusions Generally, the small intestine PPs of ruminants (such as cattle and sheep) is already mature before birth, while the ALNA in the abomasum of Bactrian camels is not yet mature in the fetal period. During the development of ALNA in Bactrian camel, the development of lymphoid follicles extends from submucosa to Lamina propria. Interestingly, the deformation of FAE changes with age from simple columnar epithelium at the beginning of pregnancy to Simple cuboidal epithelium, which is opposite to the FAE deformation characteristics of PPs in the small intestine of fetal cattle and sheep. These results are the basis of further research on the specificity of ALNA in the abomasum of Bactrian camels.
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- 2024
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3. Compounds from Agathis dammara exert hypoglycaemic activity by enhancing glucose uptake: lignans, terpenes and others
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Zhe-Wei Yu, Bang-Ping Cai, Su-Zhi Xie, Yi Zhang, Wen-Hui Wang, Shun-Zhi Liu, Yan-Lin Bin, Qi Chen, Mei-Juan Fang, Rong Qi, Ming-Yu Li, and Ying-Kun Qiu
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Agathis dammara ,Lignans ,Terpenes ,Hypoglycaemic ,Glucose uptake ,Botany ,QK1-989 - Abstract
Abstract In this study, two new kaurane diterpenes (16, 17), together with 12 lignans (1–12), a triterpene (15), and two other compounds (13, 14) were isolated from the woods of Agathis dammara. The structure of the new compound was determined by HR ESIMS and 1D/2D NMR spectroscopy, and its absolute configuration was determined by electronic circular dichroism (ECD) exciton chirality method. Compounds 5, 11, 14 exhibit significant hypoglycaemic activity in zebrafish, and their mechanism of action is to enhance glucose uptake in zebrafish. Graphical Abstract
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- 2024
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4. Antibody preparation and age-dependent distribution of TLR8 in Bactrian camel spleens
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Ying-Dong Fang, Jing-Yu Liu, Fei Xie, Li-Ping Liu, Wei-Wei Zeng, and Wen-Hui Wang
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Bactrian camels ,Toll-like receptor 8 ,Antibody preparation ,Spleen ,Aging ,Distribution ,Veterinary medicine ,SF600-1100 - Abstract
Abstract Background Toll-like receptor 8 (TLR8) can recognize specific pathogen-associated molecular patterns and exert multiple immunological functions through activation of signaling cascades. However, the precise distribution and age-related alterations of TLR8 in the spleens of Bactrian camels have not yet been investigated. This study aimed to prepare a rabbit anti-Bactrian camel TLR8 polyclonal antibody and elucidate the distribution of TLR8 in the spleens of Bactrian camels at different age groups. The methodology involved the construction of the pET-28a-TLR8 recombinant plasmid, followed by the expression of TLR8 recombinant protein via prokaryotic expression. Subsequently, rabbits were immunized with the purified protein to prepare the TLR8 polyclonal antibody. Finally, twelve Alashan Bactrian camels were categorized into four groups: young (1–2 years), pubertal (3–5 years), middle-aged (6–16 years) and old (17–20 years). These camels received intravenous sodium pentobarbital (20 mg/kg) anesthesia and were exsanguinated to collect spleen samples. Immunohistochemical techniques were employed to observe and analyze the distribution patterns and age-related changes of TLR8 in the spleen. Results The results showed that the TLR8 recombinant protein was expressed in the form of inclusion body with a molecular weight of 52 kDa, and the optimal induction condition involved 0.3 mmol/L IPTG induction for 8 h. The prepared antibody yielded a titer of 1:32 000, and the antibody demonstrated specific binding to TLR8 recombinant protein. TLR8 positive cells exhibited a consistent distribution pattern in the spleen across different age groups of Bactrian camels, primarily scattered within the periarterial lymphatic sheath of the white pulp, marginal zone, and red pulp. The predominant cell type expressing TLR8 was macrophages, with expression also observed in neutrophils and dendritic cells. Statistical analysis revealed that there were significant differences in the distribution density of TLR8 positive cells among different spleen regions at the same age, with the red pulp, marginal zone, and white pulp showing a descending order (P
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- 2023
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5. Chronic cough relief by allosteric modulation of P2X3 without taste disturbance
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Chang-Run Guo, Zhong-Zhe Zhang, Xing Zhou, Meng-Yang Sun, Tian-Tian Li, Yun-Tao Lei, Yu-Hao Gao, Qing-Quan Li, Chen-Xi Yue, Yu Gao, Yi-Yu Lin, Cui-Yun Hao, Chang-Zhu Li, Peng Cao, Michael X. Zhu, Ming-Qiang Rong, Wen-Hui Wang, and Ye Yu
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Science - Abstract
Abstract P2X receptors are cation channels that sense extracellular ATP. Many therapeutic candidates targeting P2X receptors have begun clinical trials or acquired approval for the treatment of refractory chronic cough (RCC) and other disorders. However, the present negative allosteric modulation of P2X receptors is primarily limited to the central pocket or the site below the left flipper domain. Here, we uncover a mechanism of allosteric regulation of P2X3 in the inner pocket of the head domain (IP-HD), and show that the antitussive effects of quercetin and PSFL2915 (our nM-affinity P2X3 inhibitor optimized based on quercetin) on male mice and guinea pigs were achieved by preventing allosteric changes of IP-HD in P2X3. While being therapeutically comparable to the newly licensed P2X3 RCC drug gefapixant, quercetin and PSFL2915 do not have an adverse effect on taste as gefapixant does. Thus, allosteric modulation of P2X3 via IP-HD may be a druggable strategy to alleviate RCC.
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- 2023
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6. Endovascular treatment for massive haemoptysis due to pulmonary pseudoaneurysm: report of 23 cases
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Fen-Qiang Li, Dong-Jun Su, Wan-Jia Zhang, Zhong-Ke Chen, Geng-Xiang Li, Shuang-Xi Li, Yu-xing Peng, Lei Dang, and Wen-Hui Wang
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Pulmonary artery pseudoaneurysms ,Haemoptysis ,Endovascular treatment ,Surgery ,RD1-811 ,Anesthesiology ,RD78.3-87.3 - Abstract
Abstract Purpose To evaluate the safety and effectiveness of endovascular treatment for massive haemoptysis caused by pulmonary pseudoaneurysm (PAP). Methods The clinical data, imaging data, and endovascular treatment protocol of 23 patients with massive haemoptysis caused by continuous PAP were retrospectively analysed. The success, complications, postoperative recurrence rate, and influence of the treatment on pulmonary artery pressure were also evaluated. Results Nineteen patients with a bronchial artery-pulmonary artery (BA-PA) and/or nonbronchial systemic artery-pulmonary artery (NBSA-PA) fistula underwent bronchial artery embolization (BAE) and/or nonbronchial systemic artery embolization (NBSAE) + pulmonary artery embolization (PAE). The pulmonary artery (PA) pressures before and after embolization were 52.11 ± 2.12 (35–69 cmH2O) and 33.58 ± 1.63 (22–44 cmH2O), respectively (P = 0.001). Four patients did not have a BA-PA and/or NBSA-PA fistula. Embolization was performed in two patients with a distal PAP of the pulmonalis lobar arteria. Bare stent-assisted microcoils embolization was performed in the other two patients with a PAP of the main pulmonary lobar arteries. The PA pressures of the four patients before and after treatment were 24.50 ± 1.32 (22–28 cmH2O) and 24.75 ± 1.70 (22–29 cmH2O), respectively (P = 0.850). The technique had a 100% success rate with no serious complications and a postoperative recurrence rate of 30%. Conclusion Endovascular treatment is safe and effective for massive haemoptysis caused by PAP. BAE and/or NBSAE can effectively reduce pulmonary hypertension in patients with a BA-PA and/or NBSA-PA fistula.
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- 2023
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7. Ocular manifestations and quality of life in patients after hematopoietic stem cell transplantation
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Shu-Xian Fan, Wen-Hui Wang, Peng Zeng, Ke-Zhi Huang, Yu-Xin Hu, Jing Wang, Yi-Qing Li, and Jian-Hui Xiao
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allogeneic stem cell transplantation ,ocular graft versus host disease ,ocular surface disease ,quality of life ,quality-of-life scale for chinese patients with visual impairment ,ocular surface disease index ,Ophthalmology ,RE1-994 - Abstract
AIM: To explore the relationship between ocular and systemic conditions and the impact of ocular complications on the quality of life (QOL) in patients after allogeneic hematopoietic stem cell transplantation (ALLO-HSCT). METHODS: Forty-four patients with severe hematopoietic disease were enrolled after ALLO-HSCT at our center from July 2018 to October 2020. They completed two questionnaires: the Ocular Surface Disease Index (OSDI) and the quality-of-life scale for Chinese patients with visual impairment (SQOL-DV1). Ocular conditions and systemic conditions were also assessed. RESULTS: Eye damage was correlated with total bilirubin (P=0.005), and gamma-glutamyl transferase (GGT) (P=0.021). There was no significant correlation between the overall QOL score and OSDI (P=0.8226) or SQOL-DV1 (P=0.9526) scores. The OSDI and the overall QOL score were not correlated with ocular conditions, including best-corrected visual acuity (BCVA), intraocular pressure, Schirmer tear test II, sodium fluorescein staining, tear film breakup time, and tear meniscus height. SQOL-DV1 was correlated with BCVA (P=0.0007), sodium fluorescein staining (P=0.007), and tear film breakup time (P=0.0146). CONCLUSION: In some patients, early ocular symptoms are not evident after ALLO-HSCT, while ocular surface complications can be observed after a comprehensive ophthalmological examination. Especially for those with elevated total bilirubin or GGT, regular ophthalmic follow-up visits are essential to diagnose and treat ocular graft versus host disease (oGVHD), especially for patients with elevated total bilirubin or GGT.
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- 2023
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8. A nomogram model for predicting ocular GVHD following allo-HSCT based on risk factors
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Wen-hui Wang, Li-li You, Ke-zhi Huang, Zi-jing Li, Yu-xin Hu, Si-min Gu, Yi-qing Li, and Jian-hui Xiao
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Allogeneic haematopoietic cell transplantation ,Chronic ocular graft-versus-host disease ,Nomogram ,Prediction model ,Ocular surface disease index (OSDI) ,Ophthalmology ,RE1-994 - Abstract
Abstract Objective To develop and validate a nomogram model for predicting chronic ocular graft-versus-host disease (coGVHD) in patients after allogenic haematopoietic stem cell transplantation (allo-HSCT). Methods This study included 61 patients who survived at least 100 days after allo-HSCT. Risk factors for coGVHD were screened using LASSO regression, then the variables selected were subjected to logistic regression. Nomogram was established to further confirm the risk factors for coGVHD. Receiver operating characteristic (ROC) curves were constructed to assess the performance of the predictive model with the training and test sets. Odds ratios and 95% confidence intervals (95% CIs) were calculated by using logistic regression analysis. Results Among the 61 patients, 38 were diagnosed with coGVHD. We selected five texture features: lymphocytes (LYM) (OR = 2.26), plasma thromboplastin antecedent (PTA) (OR = 1.19), CD3 + CD25 + cells (OR = 1.38), CD3 + HLA-DR + cells (OR = 0.95), and the ocular surface disease index (OSDI) (OR = 1.44). The areas under the ROC curve (AUCs) of the nomogram with the training and test sets were 0.979 (95% CI, 0.895–1.000) and 0.969 (95% CI, 0.846–1.000), respectively.And the Hosmer–Lemeshow test was nonsignificant with the training (p = 0.9949) and test sets (p = 0.9691). Conclusion We constructed a nomogram that can assess the risk of coGVHD in patients after allo-HSCT and help minimize the irreversible loss of vision caused by the disease in high-risk populations.
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- 2023
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9. Adenosine stimulates the basolateral 50 pS K+ channel in renal proximal tubule via adenosine-A1 receptor
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Hao Liu, Qi Sun, Zheng Ding, Wensen Shi, Wen-Hui Wang, and Chengbiao Zhang
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Kir4.2 ,Kir5.1 ,Na+ transport ,NHE3 ,proximal tubule ,Physiology ,QP1-981 - Abstract
Background: The basolateral potassium channels play an important role in maintaining the membrane transport in the renal proximal tubules (PT) and adenosine receptors have been shown to regulate the trans-epithelial Na+ absorption in the PT. The aim of the present study is to explore whether adenosine also regulates the basolateral K+ channel of the PT and to determine the adenosine receptor type and the signaling pathway which mediates the effect of adenosine on the K+ channel.Methods: We have used the single channel recording to examine the basolateral K+ channel activity in the proximal tubules of the mouse kidney. All experiments were performed in cell-attached patches.Results: Single channel recording has detected a 50 pS inwardly-rectifying K+ channel with high channel open probability and this 50 pS K+ channel is a predominant type K+ channel in the basolateral membrane of the mouse PT. Adding adenosine increased 50 pS K+ channel activity in cell-attached patches, defined by NPo (a product of channel Numbers and Open Probability). The adenosine-induced stimulation of the 50 pS K+ channel was absent in the PT pretreated with DPCPX, a selective inhibitor of adenosine A1 receptor. In contrast, adenosine was still able to stimulate the 50 pS K+ channel in the PT pretreated with CP-66713, a selective adenosine A2 receptor antagonist. This suggests that the stimulatory effect of adenosine on the 50 pS K+ channel of the PT was mediated by adenosine-A1 receptor. Moreover, the effect of adenosine on the 50 pS K+ channel was blocked in the PT pretreated with U-73122 or Calphostin C, suggesting that adenosine-induced stimulation of the 50 pS K+ channels of the PT was due to the activation of phospholipase C (PLC) and protein kinase C (PKC) pathway. In contrast, the inhibition of phospholipase A2 (PLA2) with AACOCF3 or inhibition of protein kinase A (PKA) with H8 failed to block the adenosine-induced stimulation of the 50 pS K+ channel of the PT.Conclusion: We conclude that adenosine activates the 50 pS K+ channels in the basolateral membrane of PT via adenosine-A1 receptor. Furthermore, the effect of adenosine on the 50 pS K+ channel is mediated by PLC-PKC signaling pathway.
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- 2023
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10. Calcineurin inhibitors stimulate Kir4.1/Kir5.1 of the distal convoluted tubule to increase NaCl cotransporter
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Dan-Dan Zhang, Xin-Peng Duan, Kerim Mutig, Franziska Rausch, Yu Xiao, Jun-Ya Zheng, Dao-Hong Lin, and Wen-Hui Wang
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Cell biology ,Nephrology ,Medicine - Abstract
We examine whether calcineurin or protein phosphatase 2B (PP2B) regulates the basolateral inwardly rectifying potassium channel Kir4.1/Kir5.1 in the distal convoluted tubule (DCT). Application of tacrolimus (FK506) or cyclosporine A (CsA) increased whole-cell Kir4.1/Kir5.1-mediated K+ currents and hyperpolarized the DCT membrane. Moreover, FK506-induced stimulation of Kir4.1/Kir5.1 was absent in kidney tubule–specific 12 kDa FK506-binding protein–knockout mice (Ks-FKBP-12–KO). In contrast, CsA stimulated Kir4.1/Kir5.1 of the DCT in Ks-FKBP-12–KO mice, suggesting that FK506-induced stimulation of Kir4.1/Kir5.1 was due to inhibiting PP2B. Single-channel patch-clamp experiments demonstrated that FK506 or CsA stimulated the basolateral Kir4.1/Kir5.1 activity of the DCT, defined by NPo (a product of channel number and open probability). However, this effect was absent in the DCT treated with Src family protein tyrosine kinase (SFK) inhibitor or hydroxyl peroxide. Fluorescence imaging demonstrated that CsA treatment increased membrane staining intensity of Kir4.1 in the DCT of Kcnj10fl/fl mice. Moreover, CsA treatment had no obvious effect on phosphorylated NaCl cotransporter (pNCC) expression in Ks-Kir4.1–KO mice. Immunoblotting showed acute FK506 treatment increased pNCC expression in Kcnj10fl/fl mice, but this effect was attenuated in Ks-Kir4.1–KO mice. In vivo measurement of thiazide-induced renal Na+ excretion demonstrated that FK506 enhanced thiazide-induced natriuresis. This effect was absent in Ks-FKBP-12–KO mice and blunted in Ks-Kir4.1–KO mice. We conclude that inhibition of PP2B stimulates Kir4.1/Kir5.1 of the DCT and NCC and that PP2B inhibition–induced stimulation of NCC is partially achieved by stimulation of the basolateral Kir4.1/Kir5.1.
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- 2023
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11. Moniezia benedeni infection enhances neuromedin U (NMU) expression in sheep (Ovis aries) small intestine
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Wan-Ling Yao, Li-Ping Liu, Yan-Qiao Wen, Bao-Shan Wang, Jia-Qi Dong, Wan-Hong He, Xi-Ping Fan, Wen-Hui Wang, and Wang-Dong Zhang
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Sheep ,Small intestine ,Moniezia benedeni infection ,NMU ,Prokaryotic expression ,Distribution ,Veterinary medicine ,SF600-1100 - Abstract
Abstract Background Neuromedin U (NMU) plays an important role in activating the group 2 innate lymphoid cells (ILC2s) and initiating the host’s anti-parasitic immune responses. It is aimed to explore the distribution characteristics of NMU in the sheep small intestine and the influence of Moniezia benedeni infection on them. In the present study, the pET-28a-NMU recombinant plasmids were constructed, and Escherichia coli. BL21 (DE3) were induced to express the recombinant protein. And then, the rabbit anti-sheep NMU polyclonal antibody was prepared and immunofluorescence staining was performed with it. The expression levels of NMU in the intestine of normal and Moniezia benedeni-infected sheep were detected by ELISA. Results The results showed that the molecular weight of the obtained NMU recombinant protein was consistent with the expected molecular (13 kDa) and it was expressed in the form of inclusion body. The titer and specificity of obtained rabbit anti-sheep NMU polyclonal antibody were good. The results of immunofluorescence analysis showed that the nerve fibers which specifically expressed NMU mainly extended from the ganglion in the submucosal to lamina propria (LP) in the sheep small intestine, and the expression level was relatively high; especially on the nerve fibers of LP around the intestinal glands. The expression levels were gradually increased from the duodenum to the ileum, and the levels in the jejunum and ileum were significantly higher than that in the duodenum (P
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- 2022
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12. Age-dependent changes in the anatomical and histological characteristics of the aggregated lymphoid nodules in the stomach of Dromedary camels (Camelus Dromedarius)
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Zubieda Ibrahim Hassan Omer, Jia Lu, Yu-Jiao Cheng, Pei-Xuan Li, Zhi-Hua Chen, and Wen-Hui Wang
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Medicine ,Science - Abstract
Gastrointestinal associated lymphoid tissue (GALT) is an important component of the mucosal immune system. It is the largest mass of lymphoid tissues in the body and makes up more than 70% immune cells of entire body. GALT is considered to be the origin of systemic mucosal immunity and consists of solitary lymphoid nodules, aggregated lymphoid nodules (Peyer’s patches, PPs), scattered lymphoid tissues, and follicular associated epithelia. PPs play important roles as antigen inductive sites of the mucosal immune system, which are mainly distributed in the intestine of animals and humans (especially ileum and appendix). However, a special area of well-developed aggregated lymphoid nodules in the abomasum of Dromedary camel was found in our laboratory. Its existence was rarely described in the stomach before. In the present study, we investigated this special structure with the dromedary camels of different ages (young, 0.5–2 years; pubertal, 3–5 years; middle-aged, 6–16 years; old, 17–20 years), by the anatomical, histological and immunohistochemical approaches. The results showed that the special structure was mainly distributed in the cardiac glandular area of the abomasum, forming a triangular area. The mucosal folds in this area were significantly thicker than those in the surrounding region. These mucosal folds had two different forms, namely reticular mucosal folds (RMF) and longitudinal mucosal folds (LMF). There were abundant lymphoid nodules in the submucosa of RMF and LMF, which were arranged in one or multiple rows. The statistical analysis of the height and thickness of RMF and LMF showed that the structure was most developed in pubertal dromedary camels. The histological characteristics of the structure were the same as PPs in the intestine of the Dromedary camel, while anatomical appearance showed some difference. The immunohistochemical examination revealed that both immunoglobulin A (IgA) and G (IgG) antibodies-producing cells (APCs) were extensively distributed in the gastric lamina propria (LP) in all age group. Our finding suggest that camel stomach not only performs digestive functions, but also involves parts of body immunity.
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- 2023
13. P2X3-selective mechanism of Gefapixant, a drug candidate for the treatment of refractory chronic cough
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Wen-Wen Cui, Si-Yu Wang, Yu-Qing Zhang, Yao Wang, Ying-Zhe Fan, Chang-Run Guo, Xing-Hua Li, Yun-Tao Lei, Wen-Hui Wang, Xiao-Na Yang, Motoyuki Hattori, Chang-Zhu Li, Jin Wang, and Ye Yu
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Gefapixant/AF-219 ,P2X3 receptors ,Refractory chronic cough ,Binding sites ,Subtype selectivity ,Biotechnology ,TP248.13-248.65 - Abstract
Gefapixant/AF-219, a selective inhibitor of the P2X3 receptor, is the first new drug other than dextromethorphan to be approved for the treatment of refractory chronic cough (RCC) in nearly 60 years. To date, seven P2X subtypes (P2X1-7) activated by extracellular ATP have been cloned, and subtype selectivity of P2X inhibitors is a prerequisite for reducing side effects. We previously identified the site and mechanism of action of Gefapixant/AF-219 on the P2X3 receptor, which occupies a pocket consisting of the left flipper (LF) and lower body (LB) domains. However, the mechanism by which AF-219 selectively acts on the P2X3 receptor is unknown. Here, we combined mutagenesis, chimera construction, molecular simulations, covalent occupation and chemical synthesis, and find that the negative allosteric site of AF-219 at P2X3 is also present in other P2X subtypes, at least for P2X1, P2X2 and P2X4. By constructing each chimera of AF-219 sensitive P2X3 and insensitive P2X2 subtypes, the insensitive P2X2 subtype was made to acquire the inhibitory properties of AF-219 and AF-353, an analog of AF-219 with higher affinity. Our results suggest that the selectivity of AF-219/AF-353 for P2X3 over the other P2X subtypes is determined by a combination of the accessibility of P2X3 binding site and the internal shape of this pocket, a finding that could provide new perspectives for drug design against P2X3-mediated diseases such as RCC, idiopathic pulmonary fibrosis, hypertension and overactive bladder disorder.
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- 2022
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14. The effect of high-dietary K+ (HK) on Kir4.1/Kir5.1 and ROMK in the distal convoluted tubule (DCT) is not affected by gender and Cl− content of the diet
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Xin-Xin Meng, Hao Zhang, Gui-Lin Meng, Shao-Peng Jiang, Xin-Peng Duan, Wen-Hui Wang, and Ming-Xiao Wang
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renal K+ excretion ,thiazide-sensitive ,NCC ,KCNJ1 ,KCNJ10 ,Kcnj16 ,Physiology ,QP1-981 - Abstract
Basolateral potassium channels in the distal convoluted tubule (DCT) are composed of inwardly-rectifying potassium channel 4.1 (Kir4.1) and Kir5.1. Kir4.1 interacts with Kir5.1 to form a 40 pS K+ channel which is the only type K+ channel expressed in the basolateral membrane of the DCT. Moreover, Kir4.1/Kir5.1 heterotetramer plays a key role in determining the expression and activity of thiazide-sensitive Na-Cl cotransport (NCC). In addition to Kir4.1/Kir5.1, Kir1.1 (ROMK) is expressed in the apical membrane of the late DCT (DCT2) and plays a key role in mediating epithelial Na+ channel (ENaC)-dependent K+ excretion. High dietary-K+-intake (HK) stimulates ROMK and inhibits Kir4.1/Kir5.1 in the DCT. Inhibition of Kir4.1/Kir5.1 is essential for HK-induced suppression of NCC whereas the stimulation of ROMK is important for increasing ENaC-dependent K+ excretion during HK. We have now used the patch-clamp-technique to examine whether gender and Cl− content of K+-diet affect HK-induced inhibition of basolateral Kir4.1/Kir5.1 and HK-induced stimulation of ROMK. Single-channel-recording shows that basolateral 40 pS K+ channel (Kir4.1/Kir5.1) activity of the DCT defined by NPo was 1.34 (1% KCl, normal K, NK), 0.95 (5% KCl) and 1.03 (5% K+-citrate) in male mice while it was 1.47, 1.02 and 1.05 in female mice. The whole-cell recording shows that Kir4.1/Kir5.1-mediated-K+ current of the early-DCT (DCT1) was 1,170 pA (NK), 725 pA (5% KCl) and 700 pA (5% K+-citrate) in male mice whereas it was 1,125 pA, 674 pA and 700 pA in female mice. Moreover, K+-currents (IK) reversal potential of DCT (an index of membrane potential) was -63 mV (NK), −49 mV (5% KCl) and −49 mV (5% K-citrate) in the male mice whereas it was -63 mV, −50 mV and −50 mV in female mice. Finally, TPNQ-sensitive whole-cell ROMK-currents in the DCT2 /initial-connecting tubule (CNT) were 910 pA (NK), 1,520 pA (5% KCl) and 1,540 pA (5% K+−citrate) in male mice whereas the ROMK-mediated K+ currents were 1,005 pA, 1,590 pA and 1,570 pA in female mice. We conclude that the effect of HK intake on Kir4.1/Kir5.1 of the DCT and ROMK of DCT2/CNT is similar between male and female mice. Also, Cl− content in HK diets has no effect on HK-induced inhibition of Kir4.1/Kir5.1 of the DCT and HK-induced stimulation of ROMK in DCT2/CNT.
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- 2022
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15. Dynamic recognition of naloxone, morphine and endomorphin1 in the same pocket of µ-opioid receptors
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Xin Zhang, Meng-Yang Sun, Xue Zhang, Chang-Run Guo, Yun-Tao Lei, Wen-Hui Wang, Ying-Zhe Fan, Peng Cao, Chang-Zhu Li, Rui Wang, Xing-Hua Li, Ye Yu, and Xiao-Na Yang
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morphine ,naloxone ,endomorphin 1 ,μ-opioid receptors ,ion channel ,Biology (General) ,QH301-705.5 - Abstract
Morphine, the most widely used analgesic, relieves severe pain by activating the μ-opioid receptor (MOR), whereas naloxone, with only slight structural changes compared to morphine, exhibits inhibitory effect, and is used to treat opioid abuse. The mechanism by which the MOR distinguishes between the two is unclear. Molecular dynamics (MD) simulations on a 1-μs time scale and metadynamics-enhanced conformational sampling are used here to determine the different interactions of these two ligands with MOR: morphine adjusted its pose by continuously flipping deeper into the pocket, whereas naloxone failed to penetrate deeper because its allyl group conflicts with several residues of MOR. The endogenous peptide ligand endomorphin-1 (EM-1) underwent almost no significant conformational changes during the MD simulations. To validate these processes, we employed GIRK4S143T, a MOR-activated Gβγ-protein effector, in combination with mutagenesis and electrophysiological recordings. We verified the role of some key residues in the dynamic recognition of naloxone and morphine and identified the key residue I322, which leads to differential recognition of morphine and naloxone while assisting EM-1 in activating MOR. Reducing the side chain size of I322 (MORI322A) transformed naloxone from an inhibitor directly into an agonist of MOR, and I322A also significantly attenuated the potency of MOR on EM-1, confirming that binding deep in the pocket is critical for the agonistic effect of MOR. This finding reveals a dynamic mechanism for the response of MOR to different ligands and provides a basis for the discovery of new ligands for MOR at the atomic level.
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- 2022
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16. Identification of a Conserved, Linear Epitope on VP3 of Enterovirus A Species Recognized by a Broad-Spectrum Monoclonal Antibody
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Lie Fu, Xiao-Yu Zhang, Wei-Ping Jin, Chen Wang, Sha-Sha Qian, Meng-Jun Wang, Wen-Hui Wang, Sheng-Li Meng, Jing Guo, Ze-Jun Wang, Xiao-Qi Chen, and Shuo Shen
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broad-spectrum monoclonal antibody ,Enterovirus A species ,linear and conserved epitope ,Microbiology ,QR1-502 - Abstract
Outbreaks of hand, foot and mouth disease (HFMD) have occurred frequently in the Asian-Pacific region over the last two decades, caused mainly by the serotypes in Enterovirus A species. High-quality monoclonal antibodies (mAbs) are needed to improve the accuracy and efficiency of the diagnosis of enteroviruses associated HFMD. In this study, a mAb 1A11 was generated using full particles of CV-A5 as an immunogen. In indirect immunofluorescence and Western blotting assays, 1A11 bound to the viral proteins of CV-A2, CV-A4, CV-A5, CV-A6, CV-A10, CV-A16, and EV-A71 of the Enterovirus A and targeted VP3. It has no cross-reactivity to strains of Enterovirus B and C. By mapping with over-lapped and truncated peptides, a minimal and linear epitope 23PILPGF28 was identified, located at the N-terminus of the VP3. A BLAST sequence search of the epitope in the NCBI genus Enterovirus (taxid: 12059) protein database indicates that the epitope sequence is highly conserved among the Enterovirus A species, but not among the other enterovirus species, first reported by us. By mutagenesis analysis, critical residues for 1A11 binding were identified for most serotypes of Enterovirus A. It may be useful for the development of a cost-effective and pan-Enterovirus A antigen detection for surveillance, early diagnosis and differentiation of infections caused by the Enterovirus A species.
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- 2023
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17. Evaluation of the retinal imaging quality of two kinds of diffractive multifocal intraocular lens by using two-channel technique
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Wen-Hui Wang, Lei Wu, and Yi-Fan Feng
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multi-fcocal ,intraocular lens ,diffractive ,double-pass ,Ophthalmology ,RE1-994 - Abstract
AIM: To evaluate the retinal image of two types of aspheric diffractive multifocal intraocular lens(IOL).METHODS: Retrospective cohort study. Totally 155 cases of simple cataract who received phacoemulsification combined with IOLs implantation from October 2017 to October 2019. They were divided into three groups according to the types of IOL: Aspheric Bifocal Diffractive Group: 54 patients(54 eyes); Aspheric Trifocal Diffractive Group: 54 patients(54 eyes); Aspheric Monofocal Group: 47 patients(47 eyes). All patients were evaluated postoperatively at 6mo. Double-pass visual quality analysis system was used to evaluate OSI, MTF cutoff, Strehl Ratio, OV 100%, OV 20% and OV 9% respectively. Uncorrected distance visual acuity(5m), uncorrected intermediate visual acuity(80cm), uncorrected near visual acuity(40cm), corrected distance visual acuity, distance-corrected intermediate visual acuity, distance-corrected near visual acuity were measured and compared among three groups. Visual function-14 was also assessed.RESULTS:Both of bifocal and trifocal groups had similar MTF cutoff(P=0.445), OV 100%, OV 20% and OV 9%(OV 100%: P=0.974; OV20%: P=0.713; OV 9%: P=0.947). Monofocal group had better MTF cutoff(P=0.007), OV 100%(P=0.001), OV 20%(P=0.002)and OV 9%(P=0.011)than bifocal. Besides, monofocal group had better MTF cutoff(P=0.043), OV 100%(P=0.012), OV 20%(P=0.043)and OV 9%(P=0.029)than trifocal group. There was no difference among all groups in uncorrected distance visual acuity and corrected distance visual acuity(P=0.054, 0.180). There was difference in distance-corrected intermediate(H=91.292, P
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- 2021
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18. Moniezia benedeni Infection Restrain IgA+, IgG+, and IgM+ Cells Residence in Sheep (Ovis aries) Small Intestine
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Luo-Xia Han, Wan-Ling Yao, Jing Pan, Bao-Shan Wang, Wan-Hong He, Xi-Ping Fan, Wen-Hui Wang, and Wang-Dong Zhang
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parasitology ,worms ,Moniezia benedeni ,sheep small intestine ,IgA+ cell ,IgG+ cell ,Veterinary medicine ,SF600-1100 - Abstract
Secreted immunoglobulin A (SIgA), IgG, and IgM play a crucial role in forming the intestinal mucosal immune barrier, and parasites could disturb the host's immune response by releasing various immunomodulatory molecules. Moniezia benedeni is an important pathogen parasitizing in the sheep small intestine. It is aimed to explore the residence characteristics of IgA+, IgG+, and IgM+ cells in the sheep small intestine, and the influence of Moniezia benedeni infection on them. Control group (n = 6) and infected group (n = 6) were selected, respectively, and the three subtype cells residing in the small intestine were systematically observed and analyzed. The results showed that in the Control group, the three types of positive cells were all distributed diffusely, and the total densities in jejunum, duodenum and ileum was gradually declined in turn. Notably, the change trend of IgA+ and IgG+ cells densities were both congruent with the total densities, and the differences among them were significant, respectively (P < 0.05); the IgM+ cells density was the highest in duodenum, followed by jejunum and ileum, there was no significant difference between duodenum and jejunum (P > 0.05), but both significantly higher than in ileum (P < 0.05). In the Infected group, their total densities in duodenum, jejunum and ileum were gradually declined in turn. Notably, the IgA+ and IgM+ cells densities change trend was the same as the total densities, and the differences among them were significant, respectively (P < 0.05). The IgG+ cells density in duodenum was the highest, followed by ileum and jejunum and there was significantly difference among them (P < 0.05). The comparison results between Control and Infected groups showed that from the duodenum, jejunum to ileum, IgA+, IgG+, and IgM+ cells were all reduced significantly, respectively. The results suggest that the three types of positive cells were resided heterogeneously in the small intestinal mucosa, that is, significant region-specificity; Moniezia benedeni infection could not change their diffuse distribution characteristics, but strikingly, reduce their resident densities, and the forming mucosal immune barrier were significantly inhibited. It provided powerful evidence for studying on the molecular mechanism of Moniezia benedeni evasion from immune surveillance by strongly inhibiting the host's mucosal immune barrier.
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- 2022
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19. Thymopentin-Mediated Inhibition of Cancer Stem Cell Stemness Enhances the Cytotoxic Effect of Oxaliplatin on Colon Cancer Cells
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Peng-Cheng Yu, Di Liu, Zeng-Xiang Han, Fang Liang, Cui-Yun Hao, Yun-Tao Lei, Chang-Run Guo, Wen-Hui Wang, Xing-Hua Li, Xiao-Na Yang, Chang-Zhu Li, Ye Yu, and Ying-Zhe Fan
- Subjects
thymopentin (TP5) ,colon cancer cells ,oxaliplatin ,AChRs ,cancer stem cell (CSC) ,Therapeutics. Pharmacology ,RM1-950 - Abstract
Thymopentin (TP5) is an immunomodulatory pentapeptide that has been widely used in malignancy patients with immunodeficiency due to radiotherapy and chemotherapy. Here, we propose that TP5 directly inhibits the stemness of colon cancer cells HCT116 and therefore enhances the cytotoxicity of oxaliplatin (OXA) in HCT116 cells. In the absence of serum, TP5 was able to induce cancer stemness reduction in cultured HCT116 cells and significantly reduced stemness-related signals, such as the expression of surface molecular markers (CD133, CD44 and CD24) and stemness-related genes (ALDH1, SOX2, Oct-4 and Nanog), and resulted in altered Wnt/β-catenin signaling. Acetylcholine receptors (AchRs) are implicated in this process. OXA is a common chemotherapeutic agent with therapeutic effects in various cancers. Although TP5 had no direct effect on the proliferation of HCT116, this pentapeptide significantly increased the sensitivity of HCT116 to OXA, where the effect of TP5 on the stemness of colon cancer cells through stimulation of AchRs may contribute to this process. Our results provide a promising strategy for increasing the sensitivity of colon cancer cells to chemotherapeutic agents by incorporating immunomodulatory peptides.
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- 2022
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20. Expression characteristics of polymeric immunoglobulin receptor in Bactrian camel (Camelus bactrianus) lungs.
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Wan-Hong He, Wang-Dong Zhang, Cui-Cui Cheng, Jia Lu, Lei Liu, Zhi-Hua Chen, and Wen-Hui Wang
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Medicine ,Science - Abstract
Polymeric immunoglobulin receptor (pIgR), the transmembrane transporter of polymeric immunoglobulin A and M, has multiple immune functions. To explore the characteristics of pIgR expression in Bactrian camel lungs, twelve healthy adult (2-7 years old) Bactrian camels were systematically studied. The results showed that pIgR was mainly expressed in the cytoplasm and membrane of ciliated cells, as well as in the cytoplasm and membrane of basal cells, serous cells of bronchial glands, club cells and alveolar type 2 cells in Bactrian camel lungs. Specially, as the bronchial branches extended, the pIgR expression level in ciliated cells significantly declined (p
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- 2022
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21. Efficacy and safety of wait and see strategy versus radical surgery and local excision for rectal cancer with cCR response after neoadjuvant chemoradiotherapy: a meta-analysis
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Guo-hua Zhao, Li Deng, Dong-man Ye, Wen-hui Wang, Yan Yan, and Tao Yu
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Wait and see ,Radical surgery ,Local excision ,cCR ,Meta-analysis ,Surgery ,RD1-811 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Neoadjuvant therapy can shrink tumors, increase anus preservation rate, and protect anal function. Radical surgery need cut off the diseased bowel, clean up the lymph nodes, and then restore bowel function. It could bring traumatic effect and poor postoperative quality of life to the patient. Local resection requires removal of the diseased bowel with circular negative margin. The surgical trauma is small, and the postoperative quality of life is good. In this meta-analysis, we aimed to evaluate the efficacy and safety between wait and see strategy (WS), radical surgery (RS), and local excision (LE) of rectal cancer patients with clinical complete response (cCR) response after neoadjuvant chemoradiotherapy. Methods We searched PubMed, Cochrane Library, CNKI (China National Knowledge Infrastructure), and Wanfang databases to compare wait and see strategy with radical surgery and local excision for rectal cancer with cCR response after neoadjuvant chemoradiotherapy up to March 2020. We collected the data of local recurrence, distant metastasis, cancer-related death, overall survival, and disease-free survival and used RevMan 5.0 to carry out the meta-analysis. Continuous data were evaluated by the standardized mean differences (SMD) with 95% confidence intervals (95% CIs), and dichotomous data were evaluated by relative risks (ORs or RRs) with 95% CIs. We aimed to compare the advantages and disadvantages of the three groups. Results Eleven English studies with 1131 patients were included. There were 412 patients in WS group, 678 patients in RS group, and 41 patients in LE group. WS group had a higher local recurrence rate than RS group (OR 7.32, 95% CI 3.58 to 14.95, P < 0.001). There was no significant difference in the other data between the three groups. Conclusion Compared with the RS group, the WS group had an increased risk of local recurrence. However, the WS group had a similar DFS and OS compared with the RS group and the local excision group. Hence, we speculated that the WS group would have similar results as the surgery group for patients with cCR status.
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- 2020
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22. Low toxicity and high immunogenicity of an inactivated vaccine candidate against COVID-19 in different animal models
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Ze-Jun Wang, Hua-Jun Zhang, Jia Lu, Kang-Wei Xu, Cheng Peng, Jing Guo, Xiao-Xiao Gao, Xin Wan, Wen-Hui Wang, Chao Shan, Su-Cai Zhang, Jie Wu, An-Na Yang, Yan Zhu, Ao Xiao, Lei Zhang, Lie Fu, Hao-Rui Si, Qian Cai, Xing-Lou Yang, Lei You, Yan-Ping Zhou, Jing Liu, De-Qing Pang, Wei-Ping Jin, Xiao-Yu Zhang, Sheng-Li Meng, Yun-Xia Sun, Ulrich Desselberger, Jun-Zhi Wang, Xin-Guo Li, Kai Duan, Chang-Gui Li, Miao Xu, Zheng-Li Shi, Zhi-Ming Yuan, Xiao-Ming Yang, and Shuo Shen
- Subjects
SARS-CoV-2 ,inactivated vaccine ,immunogenicity ,toxicity ,animal models ,Infectious and parasitic diseases ,RC109-216 ,Microbiology ,QR1-502 - Abstract
ABSTRACTThe ongoing COVID-19 pandemic is causing huge impact on health, life, and global economy, which is characterized by rapid spreading of SARS-CoV-2, high number of confirmed cases and a fatality/case rate worldwide reported by WHO. The most effective intervention measure will be to develop safe and effective vaccines to protect the population from the disease and limit the spread of the virus. An inactivated, whole virus vaccine candidate of SARS-CoV-2 has been developed by Wuhan Institute of Biological Products and Wuhan Institute of Virology. The low toxicity, immunogenicity, and immune persistence were investigated in preclinical studies using seven different species of animals. The results showed that the vaccine candidate was well tolerated and stimulated high levels of specific IgG and neutralizing antibodies. Low or no toxicity in three species of animals was also demonstrated in preclinical study of the vaccine candidate. Biochemical analysis of structural proteins and purity analysis were performed. The inactivated, whole virion vaccine was characterized with safe double-inactivation, no use of DNases and high purity. Dosages, boosting times, adjuvants, and immunization schedules were shown to be important for stimulating a strong humoral immune response in animals tested. Preliminary observation in ongoing phase I and II clinical trials of the vaccine candidate in Wuzhi County, Henan Province, showed that the vaccine is well tolerant. The results were characterized by very low proportion and low degree of side effects, high levels of neutralizing antibodies, and seroconversion. These results consistent with the results obtained from preclinical data on the safety.
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- 2020
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23. Biochemical and antigenic characterization of the structural proteins and their post-translational modifications in purified SARS-CoV-2 virions of an inactivated vaccine candidate
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Xiao-Yu Zhang, Jing Guo, Xin Wan, Jin-Ge Zhou, Wei-Ping Jin, Jia Lu, Wen-Hui Wang, An-Na Yang, Ding Xiang Liu, Zheng-Li Shi, Zhi-Ming Yuan, Xin-Guo Li, Sheng-Li Meng, Kai Duan, Ze-Jun Wang, Xiao-Ming Yang, and Shuo Shen
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Inactivated vaccine ,SARS-CoV-2 ,structural proteins ,modifications ,antigenicity ,Infectious and parasitic diseases ,RC109-216 ,Microbiology ,QR1-502 - Abstract
ABSTRACTIn the face of COVID-19 pandemic caused by the newly emerged SARS-CoV-2, an inactivated, Vero cell-based, whole virion vaccine candidate has been developed and entered into phase III clinical trials within six months. Biochemical and immunogenic characterization of structural proteins and their post-translational modifications in virions, the end-products of the vaccine candidate, would be essential for the quality control and process development of vaccine products and for studying the immunogenicity and pathogenesis of SARS-CoV-2. By using a panel of rabbit antisera against virions and five structural proteins together with a convalescent serum, the spike (S) glycoprotein was shown to be N-linked glycosylated, PNGase F-sensitive, endoglycosidase H-resistant and cleaved by Furin-like proteases into S1 and S2 subunits. The full-length S and S1/S2 subunits could form homodimers/trimers. The membrane (M) protein was partially N-linked glycosylated; the accessory protein 3a existed in three different forms, indicative of cleavage and dimerization. Furthermore, analysis of the antigenicity of these proteins and their post-translationally modified forms demonstrated that S protein induced the strongest antibody response in both convalescent and immunized animal sera. Interestingly, immunization with the inactivated vaccine did not elicit antibody response against the S2 subunit, whereas strong antibody response against both S1 and S2 subunits was detected in the convalescent serum. Moreover, vaccination stimulated stronger antibody response against S multimers than did the natural infection. This study revealed that the native S glycoprotein stimulated neutralizing antibodies, while bacterially-expressed S fragments did not. The study on S modifications would facilitate design of S-based anti-SARS-CoV-2 vaccines.
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- 2020
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24. Effectiveness and safety of secukinumab in Chinese patients with plaque psoriasis in a clinical practice setting: a pilot study
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Si-Man Zhu, Wen-Hui Wang, Jin-Zhu Guo, Xin Guan, Yue-Hua Men, Hua Zhang, Yi-Ming Zhao, Chun-Lei Zhang, and Li-Shao Guo
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Medicine - Published
- 2020
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25. Time to relapse after treatment withdrawal for different biologics used to treat plaque psoriasis
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Xiao-Yu Wang, Chun-Lei Zhang, Wen-Hui Wang, and Xin Chen and Yuan-Yuan Ji.
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Medicine - Published
- 2020
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26. First report of Athelia bombacina causing postharvest fruit rot on pear
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Xiao-hui JIA, Jun-fan FU, Wen-hui WANG, Jian-chao CUI, Yan-min DU, Ru-jun ZHOU, and Ping-ping SUN
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pear ,pathogenicity ,postharvest ,Athelia bombacina ,fruit rot ,Agriculture (General) ,S1-972 - Abstract
Pear is an important fruit crop in the world. An uncharacterized disease has been observed on pear fruits during cold storage in Suning, Shenzhou, Xinji and other locations in Hebei Province, China. The incidence rate of the disease has reached 10%, and sometimes up to 20%. A particular fungus was consistently isolated from the infected pear fruit and cultured. Based on its morphology, molecular characteristics, pathogenicity and ITS sequence, the fungus was identified as Athelia bombacina. To our knowledge, this is the first report of Athelia bombacina causing postharvest fruit rot on pear.
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- 2018
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27. Effect of Angiotensin II on ENaC in the Distal Convoluted Tubule and in the Cortical Collecting Duct of Mineralocorticoid Receptor Deficient Mice
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Peng Wu, Zhong‐Xiuzi Gao, Dan‐Dan Zhang, Xin‐Peng Duan, Andrew S. Terker, Dao‐Hong Lin, David H. Ellison, and Wen‐Hui Wang
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aldosterone ,AT1R ,hyperkalemia ,hypertension ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Abstract
Background Angiotensin II stimulates epithelial Na+ channel (ENaC) by aldosterone‐independent mechanism. We now test the effect of angiotensin II on ENaC in the distal convoluted tubule (DCT) and cortical collecting duct (CCD) of wild‐type (WT) and kidney‐specific mineralocorticoid receptor knockout mice (KS‐MR‐KO). Methods and Results We used electrophysiological, immunoblotting and renal‐clearance methods to examine the effect of angiotensin II on ENaC in KS‐MR‐KO and wild‐type mice. High K+ intake stimulated ENaC in the late DCT/early connecting tubule (DCT2/CNT) and in the CCD whereas low sodium intake stimulated ENaC in the CCD but not in the DCT2/CNT. The deletion of MR abolished the stimulatory effect of high K+ and low sodium intake on ENaC, partially inhibited ENaC in DCT2/CNT but almost abolished ENaC activity in the CCD. Application of losartan inhibited ENaC only in DCT2/CNT of both wild‐type and KS‐MR‐KO mice but not in the CCD. Angiotensin II infusion for 3 days has a larger stimulatory effect on ENaC in the DCT2/CNT than in the CCD. Three lines of evidence indicate that angiotensin II can stimulate ENaC by MR‐independent mechanism: (1) angiotensin II perfusion augmented ENaC expression in KS‐MR‐KO mice; (2) angiotensin II stimulated ENaC in the DCT2/CNT but to a lesser degree in the CCD in KS‐MR‐KO mice; (3) angiotensin II infusion augmented benzamil‐induced natriuresis, increased the renal K+ excretion and corrected hyperkalemia of KS‐MR‐KO mice. Conclusions Angiotensin II‐induced stimulation of ENaC occurs mainly in the DCT2/CNT and to a lesser degree in the CCD and MR plays a dominant role in determining ENaC activity in the CCD but to a lesser degree in the DCT2/CNT.
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- 2020
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28. Bacterial community analysis on the different mucosal immune inductive sites of gastrointestinal tract in Bactrian camels.
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Wang-Dong Zhang, Wan-Ling Yao, Wan-Hong He, Jian-Fei Li, Xiu-Ping Wu, Zhi-Hua Chen, Lei Liu, and Wen-Hui Wang
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Medicine ,Science - Abstract
The microbial communities colonize the mucosal immune inductive sites could be captured by hosts, which could initiate the mucosal immune responses. The aggregated lymphoid nodule area (ALNA) and the ileal Payer's patches (PPs) in Bactrian camels are both the mucosal immune inductive sites of the gastrointestinal tract. Here, the bacteria community associated with the ALNA and ileal PPs were analyzed using of 16S rDNA-Illumina Miseq sequencing. The mutual dominant bacterial phyla at the two sites were the Bacteroidetes, Firmicutes, Verrucomicrobia and Proteobacteria, and the mutual dominant genus in both sits was Prevotella. The abundances of the Fibrobacter, Campylobacter and RFP12 were all higher in ALNA than in ileal PPs. While, the abundances of the 5-7N15, Clostridium, and Escherichia were all higher in ileal PPs than in ALNA. The results suggested that the host's intestinal microenvironment is selective for the symbiotic bacteria colonizing the corresponding sites, on the contrary, the symbiotic bacteria could impact on the physiological functions of this local site. In ALNA and ileal PPs of Bactrian camel, the bacteria which colonized different immune inductive sites have the potential to stimulate different immune responses, which is the result of the mutual selection and adaptation between microbial communities and their host.
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- 2020
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29. Optimal storage temperature and 1-MCP treatment combinations for different marketing times of Korla Xiang pears
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Xiao-hui JIA, Wen-hui WANG, Yan-min DU, Wei TONG, Zhi-hua WANG, and Hera Gul
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low temperature ,1-methylcyclopropene ,Korla Xiang pear ,maintenance of green color ,quality ,Agriculture (General) ,S1-972 - Abstract
Maintenance of green color is the primary indicator of quality in the market evaluation of Korla Xiang pears at present and can generally be achieved through early harvesting and decreasing the storage temperature, but the fruit quality was reduced by early harvesting, and the decreasing storage temperature increased the risk of chilling injury. The objectives of this study were to determine the optimal storage parameters for different storage times and to find ways to preserve the green skin color of pears. Specifically, we analyzed the effects of the ethylene inhibitor, 1-methylcyclopropene (1-MCP), combined with low temperature on quality and maintenance of the green color of Korla Xiang pears during storage. We found that 1-MCP and/or low temperature reduced the loss of green color at 20°C after being removed from cold storage. In addition, 1-MCP significantly inhibited the decline of titratable acid and ascorbic acid but had no significant effect on fruit firmness and total soluble solids. Low temperature with or without 1-MCP inhibited the release of ethylene, inhibited the decline in the stalk preservation index, inhibited the increase in decay rate and weight loss rate during storage, and inhibited the increase in the core browning index after 225 days of storage. Different storage temperatures had different effects on the quality of Korla Xiang pears. Despite inhibiting ethylene release, a storage temperature of −1.5°C increased the respiration rate. Storage at −1.5°C caused core browning early during storage due to chilling injury, whereas at 2°C core browning occurred late during storage due to senescence. In late storage, 1-MCP had no significant effect on the maintenance of Korla Xiang pear quality at 2°C. Based on these results, we determined the optimal combinations of low temperature and 1-MCP treatment to maintain pear quality while avoiding chilling injury. For different marketing times, the optimal conditions for storage until New Year's Day (a storage duration of 90 days) are 2°C or 1-MCP combined with 2°C. For storage until the Spring Festival (a storage duration of 150 days), the optimal conditions are 0°C or 1-MCP combined with 0°C, and for storage until May (a storage duration of 225 days), the best conditions are 1-MCP combined with −1.5°C.
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- 2018
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30. Environmental exogenous factors and facial dermatitis: A case control study
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Wen-Hui Wang, Lin-Feng Li, Xue-Yan Lu, and Jing Wang
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alcohol ,allergic contact dermatitis ,facial dermatitis ,patch test ,spicy food ,sunlight ,Dermatology ,RL1-803 - Abstract
Background/objective: Facial dermatitis is common and the roles different exogenous factors play between facial and nonfacial dermatitis is unknown. The study aim was to investigate the etiology and self-reported exogenous aggravation factors in facial dermatitis. Methods: There were 89 facial dermatitis patients patch tested in a tertiary hospital during a 1-year period, and 112 patients with nonfacial dermatitis tested in the same period who served as a control. Association of exogenous factors was investigated by multivariate analyses. Results: Of the cases of facial dermatitis, 30.3% were confirmed allergic contact dermatitis, which was higher than that (23.2%) in controls. Cosmetic allergy was much more common in facial than nonfacial allergic contact dermatitis (96.3% vs. 19.2%); 51.9% of facial allergic contact dermatitis cases were caused by facial creams; 6.7% of facial dermatitis were irritant contact dermatitis, compared with 2.7% for controls; 9.0% of cases were seasonal facial dermatitis. The positive patch test reactions to at least one standard allergen were 65.2% in facial dermatitis and 58.0% in controls. Self-reported exogenous aggravation factors in facial dermatitis were spicy food ingestion (24.7%), low moisture (22.5%), sunlight (19.1%), alcohol ingestion (15.7%), seafood ingestion (14.6%), beef or lamb ingestion (12.4%), and high humidity (5.6%). Multivariate logistic regression analysis adjusting for sex, age, disease duration, atopic diathesis, and contact allergy showed that more patients reported aggravation by sunlight exposure (p = 0.008), ingestion of spicy food (p = 0.025), or alcohol (p = 0.044). Conclusions: Contact factors play an important role in facial dermatitis. Aggravation by sunlight exposure, ingestion of spicy food, or alcohol are more reported in facial dermatitis compared with nonfacial dermatitis.
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- 2017
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31. Localization of neonatal Fc receptor for IgG in aggregated lymphoid nodules area in abomasum of Bactrian camels (Camelus bactrianus) of different ages
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Wang-Dong Zhang, Wen-Hui Wang, Shu-Xian Li, Shuai Jia, Xue-Feng Zhang, and Ting-Ting Cao
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Neonatal Fc receptor (FcRn) ,Expression ,Aggregated lymphoid nodules area (ALNA) ,Bactrian camels ,Epithelium ,Mucosal immunity ,Veterinary medicine ,SF600-1100 - Abstract
Abstract Background The neonatal Fc receptor (FcRn) plays a crucial role in transporting IgG and associated antigens across polarized epithelial barriers in mucosal immunity. However, it was not clear that FcRn expression in aggregated lymphoid nodules area (ALNA) in abomasum, a unique and important mucosal immune structure discovered only in Bactrian camels. In the present study, 27 Alashan Bactrian camels were divided into the following five age groups: fetus (10–13 months of gestation), young (1–2 years), pubertal (3–5 years), middle-aged (6–16 years) and old (17–20 years). The FcRn expressions were observed and analyzed in detail with histology, immunohistochemistry, micro-image analysis and statistical methods. Results The results showed that the FcRn was expressed in mucosal epithelial cells of ALNA from the fetus to the old group, although the expression level rapidly declined in old group; moreover, after the ALNA maturated, the FcRn expression level in the non-follicle-associated epithelium (non-FAE) was significantly higher than that in FAE (P
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- 2016
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32. The Distribution of SIgA and IgG Antibody-Secreting Cells in the Small Intestine of Bactrian Camels (Camelus bactrianus) of Different Ages.
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Wang-Dong Zhang, Wen-Hui Wang, and Shuai Jia
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Medicine ,Science - Abstract
Secretory immunoglobulin A (SIgA) and immunoglobulin G (IgG) antibody-secreting cells (ASCs) are two important cell types in the mucosal immune system. This study aimed to explore the distribution of these ASC populations in the small intestine of Bactrian camels of different ages. Twenty-four Alashan Bactrian camels were divided into the following four age groups: young (1-2 years), pubertal (3-5 years), middle-aged (6-16 years) and old (17-20 years). SIgA and IgG ASCs in the intestinal mucosa lamina propria (LP) were observed and analyzed using immunohistochemcal techniques. The results from all age groups show that both SIgA and IgG ASCs were diffusely distributed in the intestinal LP, and some cells aggregated around the crypts. Moreover, the densities of the two ASC populations gradually increased from the duodenum to the jejunum and then decreased in the ileum. Meanwhile, there were more SIgA ASCs than IgG ASCs in the duodenum, jejunum, and ileum, and these differences were significant in the young and pubertal groups (P
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- 2016
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33. Quantization-Dependent Dynamic Event-Triggered Control for Networked Switched Systems Under Denial-of-Service Attacks.
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Wen-Hui Wang, Yan-Wu Wang, Xiaokang Liu 0001, and Zhi-Wei Liu
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- 2024
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34. An Integrated Approach for Identifying Molecular Subtypes in Human Colon Cancer Using Gene Expression Data
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Wen-Hui Wang, Ting-Yan Xie, Guang-Lei Xie, Zhong-Lu Ren, and Jin-Ming Li
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subtypes of cancer ,colon cancer ,Bayesian robust principal component ,hierarchical clustering ,feature selection ,Genetics ,QH426-470 - Abstract
Identifying molecular subtypes of colorectal cancer (CRC) may allow for more rational, patient-specific treatment. Various studies have identified molecular subtypes for CRC using gene expression data, but they are inconsistent and further research is necessary. From a methodological point of view, a progressive approach is needed to identify molecular subtypes in human colon cancer using gene expression data. We propose an approach to identify the molecular subtypes of colon cancer that integrates denoising by the Bayesian robust principal component analysis (BRPCA) algorithm, hierarchical clustering by the directed bubble hierarchical tree (DBHT) algorithm, and feature gene selection by an improved differential evolution based feature selection method (DEFSW) algorithm. In this approach, the normal samples being completely and exclusively clustered into one class is considered to be the standard of reasonable clustering subtypes, and the feature selection pays attention to imbalances of samples among subtypes. With this approach, we identified the molecular subtypes of colon cancer on the mRNA gene expression dataset of 153 colon cancer samples and 19 normal control samples of the Cancer Genome Atlas (TCGA) project. The colon cancer was clustered into 7 subtypes with 44 feature genes. Our approach could identify finer subtypes of colon cancer with fewer feature genes than the other two recent studies and exhibits a generic methodology that might be applied to identify the subtypes of other cancers.
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- 2018
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35. Preliminary Experimental Study on Pressure Loss Coefficients of Exhaust Manifold Junction
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Xiao-lu Lu, Kun Zhang, Wen-hui Wang, Shao-ming Wang, and Kang-yao Deng
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Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
The flow characteristic of exhaust system has an important impact on inlet boundary of the turbine. In this paper, high speed flow in a diesel exhaust manifold junction was tested and simulated. The pressure loss coefficient of the junction flow was analyzed. The steady experimental results indicated that both of static pressure loss coefficients L13 and L23 first increased and then decreased with the increase of mass flow ratio of lateral branch and public manifold. The total pressure loss coefficient K13 always increased with the increase of mass flow ratio of junctions 1 and 3. The total pressure loss coefficient K23 first increased and then decreased with the increase of mass flow ratio of junctions 2 and 3. These pressure loss coefficients of the exhaust pipe junctions can be used in exhaust flow and turbine inlet boundary conditions analysis. In addition, simulating calculation was conducted to analyze the effect of branch angle on total pressure loss coefficient. According to the calculation results, total pressure loss coefficient was almost the same at low mass flow rate of branch manifold 1 but increased with lateral branch angle at high mass flow rate of branch manifold 1.
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- 2014
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36. Few-shot learning for skin lesion image classification.
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Xue-Jun Liu, Kai-li Li, Hai-ying Luan, Wen-hui Wang, and Zhao-yu Chen
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- 2022
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37. Electroacupuncture improves myocardial fibrosis in heart failure rats by attenuating ECM collagen deposition through modulation of TGF-β1/Smads signaling pathway.
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Wen-Hui Wang, Qian-Lan Zeng, Jiao-Jiao Zhang, Hao-Sheng Wu, Sheng-Bing Wu, and Mei-Qi Zhou
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- *
ELECTROACUPUNCTURE , *VENTRICULAR ejection fraction , *HEART fibrosis , *HEART failure , *BRAIN natriuretic factor , *LABORATORY rats , *CELLULAR signal transduction , *SPINACH - Abstract
Background: To explore the effects of electroacupuncture on cardiac function and myocardial fibrosis in rat models of heart failure, and to elucidate the underlying mechanism of electroacupuncture in heart failure treatment. Methods: Healthy male Sprague-Dawley rats were allocated into three groups: Sham group, Model group, and electroacupuncture (Model + EA) group, with each group comprising 8 rats. The model underwent a procedure involving the ligation of the left anterior descending coronary artery to induce a model of heart failure. The Model + EA group was used for 7 consecutive days for electroacupuncture of bilateral Shenmen (HT7) and Tongli (HT5), once a day for 30 min each time. Left ventricular parameters in rats were assessed using a small-animal ultrasound machine to analyze changes in left ventricular end-diastolic volume, left ventricular end-systolic volume, left ventricular ejection fraction, and left ventricular fractional shortening. Serum interleukin-1β (IL-1β), cardiac troponin (cTn), and N-terminal brain natriuretic peptide precursor levels were measured using ELISA. Histopathological changes in rat myocardium were observed through HE staining, while collagen deposition in rat myocardial tissue was assessed using the Masson staining method. Picro sirius red staining, immunohistochemical staining, and RT-qPCR were utilized to distinguish between the various types of collagen deposition. The expression level of TGF-β1 and SMAD2/3/4/7 mRNA in rat myocardial tissues was determined using RT-qPCR. Additionally, western blot analysis was conducted to assess the protein expression levels of TGF-β1, SMAD3/7, and p-SMAD3 in rat myocardial tissues. Results: Compared with the Sham group, the left ventricular ejection fraction and left ventricular fractional shortening values of the Model group were significantly decreased (P < 0.01); the left ventricular end-diastolic volume and left ventricular end-systolic volume values were remarkably increased (P < 0.01); serum N-terminal brain natriuretic peptide precursor content was increased (P < 0.01); serum IL-1β and cTn levels were increased (P < 0.01); myocardial collagen volume fraction were increased (P < 0.01); and those of the expression of TGF-β1 and SMAD2/3/4 mRNA was increased (P < 0.01); the expression of SMAD7 mRNA was decreased (P < 0.01); the protein expression levels of TGF-β1, SMAD3, and p-Smad3 were increased (P < 0.01); the protein expression level of SMAD7 was decreased (P < 0.01) in the Model group. Compared to the Model group, the expression levels of the proteins TGF-β1, SMAD3, and p-Smad3 in myocardial tissue were found to be decreased (P < 0.01), and the expression level of the protein SMAD7 was found to be increased (P < 0.01) in the Model + EA group; the collagen volume fraction and deposition of type I/III collagen were decreased (P < 0.01) in the Model + EA group. Conclusion: Electroacupuncture alleviates myocardial fibrosis in rats with heart failure, and this effect is likely due to attributed to the modulation of the TGF-β1/Smads signaling pathway, which helps reduce collagen deposition in the extracellular matrix. [ABSTRACT FROM AUTHOR]
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- 2024
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38. Effects of electroacupuncture stimulation of the Wushu acupoints along the heart channel on brain-derive neurotrophic factor overexpression and angiogenesis in rats with acute myocardial ischemia.
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Hao-Sheng Wu, Hang Su, Wen-Hui Wang, Chao Zhu, Sheng-Bing Wu, and Mei-Qi Zhou
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MYOCARDIAL ischemia ,HEMATOXYLIN & eosin staining ,ACUPUNCTURE points ,ELECTROACUPUNCTURE ,CORONARY arteries ,PROTEIN overexpression - Abstract
Background: To explore the effect of electroacupuncture Wushu acupoints on angiogenesis and expressions of brain-derived neurotrophic factor (BDNF), as well as to explore the possible mechanism of electroacupuncture on acute myocardial ischemia (AMI). Methods: We randomly divided 42 Sprague Dawley rats into sham AMI group, AMI group, and the heart channel groups comprising Shaochong (HT9) acupoint, Shaofu (HT8) acupoint, Shenmen (HT7) acupoint, Lingdao (HT4) acupoint, and Shaohai (HT3) acupoint groups, with 6 rats in each group. The AMI model was fabricated via hypodesmus of the left anterior descending coronary artery. After modeling, the corresponding acupoints of each group underwent electroacupuncture treatment 30 min/time, once/day for 3 consecutive days. The cardiogram obtained before and after the intervention was compared, and the pathologic changes of the myocardial tissue were observed via hematoxylin & eosin staining. The amount of serum endothelin-1, prostacycline-2, thromboxane-2, and BDNF indicators were assayed using ELISA, the number of CD31-positive cells in myocardial tissue was calculated using immunohistochemistry, and the expression levels of BDNF and TrKB was measured using western blot. Result: Compared with the sham AMI group, the ST segment on the electrocardiogram was significantly elevated (P < 0.05); the myocardial angiogenesis marker CD31 was remarkably increased (P < 0.05); serum levels of endothelin-1, prostacycline-2 and prostacycline-2/thromboxane-2 were decreased (P < 0.05), whereas serum levels of thromboxane-2 levels were increased (P < 0.05); and those of serum BDNF was decreased (P < 0.05); the protein overexpression contents of BDNF and TrKB in the myocardial tissues of HT8 acpoint and Shenmen acpoint groups were reduced (P < 0.05) in the AMI group. Compared with the AMI group, in the heart channel groups, the ST segment of electrocardiogram was dramatically reduced (P < 0.05); CD31 was dramatically elevated (P < 0.05); the serum levels of endothelin-1, prostacycline-2, and prostacycline-2/thromboxane-2 were increased (P < 0.05), thromboxane-2 levels were reduced (P < 0.05); the serum BDNF level was increased (P < 0.05); the protein overexpression levels of BDNF and TrKB in myocardial tissue of HT8 group and Shenmen group was increased (P < 0.05). Conclusion: electroacupuncture of Wushu acupoints along the heart channel may enhance myocardial ischemia by promoting overexpression of serum BDNF and activating the BDNF/TrKB pathway to promote myocardial angiogenesis. [ABSTRACT FROM AUTHOR]
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- 2024
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39. A Point Cloud Classification Method and Its Applications Based on Multi-Head Self-Attention
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Xue-Jun Liu, Xue-Jun Liu, primary, Xue-Jun Liu, Wen-Hui Wang, additional, Wen-Hui Wang, Yong Yan, additional, Yong Yan, Zhong-Ji Cui, additional, Zhong-Ji Cui, Yun Sha, additional, and Yun Sha, Yi-Nan Jiang, additional
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- 2023
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40. Role of Angiotensin II Type 1a Receptor (AT1aR) of Renal Tubules in Regulating Inwardly Rectifying Potassium Channels 4.2 (Kir4.2), Kir4.1, and Epithelial Na+ Channel (ENaC).
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Xin-Peng Duan, Yu Xiao, Xiao-Tong Su, Jun-Ya Zheng, Susan Gurley, Emathinger, Jacqueline, Chao-Ling Yang, McCormick, James, Ellison, David H., Dao-Hong Lin, and Wen-Hui Wang
- Abstract
BACKGROUND: Kir4.2 and Kir4.1 play a role in regulating membrane transport in the proximal tubule (PT) and in the distalconvoluted- tubule (DCT), respectively. METHODS: We generated kidney-tubule-specific-AT1aR-knockout (Ks-AT1aR-KO) mice to examine whether renal AT1aR regulates Kir4.2 and Kir4.1. RESULTS: Ks-AT1aR-KO mice had a lower systolic blood pressure than Agtr1a
flox/flox (control) mice. Ks-AT1aR-KO mice had a lower expression of NHE3 (Na+ /H+ -exchanger 3) and Kir4.2, a major Kir-channel in PT, than Agtr1aflox/flox mice. Whole-cell recording also demonstrated that the membrane potential in PT of Ks-AT1aR-KO mice was lesser negative than Agtr1aflox/flox mice. The expression of Kir4.1 and Kir5.1, Kir4.1/Kir5.1-mediated K+ currents of DCT and DCT membrane potential in Ks-AT1aR-KO mice, were similar to Agtr1aflox/flox mice. However, angiotensin II perfusion for 7 days hyperpolarized the membrane potential in PT and DCT of the control mice but not in Ks-AT1aR-KO mice, while angiotensin II perfusion did not change the expression of Kir4.1, Kir4.2, and Kir5.1. Deletion of AT1aR did not significantly affect the expression of αENaC (epithelial Na+ channel) and βENaC but increased cleaved γENaC expression. Patch-clamp experiments demonstrated that deletion of AT1aR increased amiloride-sensitive Na+ -currents in the cortical-collecting duct but not in late-DCT. However, tertiapin-Q sensitive renal outer medullary potassium channel currents were similar in both genotypes. CONCLUSIONS: AT1aR determines the baseline membrane potential of PT by controlling Kir4.2 expression/activity but AT1aR is not required for determining the baseline membrane potential of the DCT and Kir4.1/Kir5.1 activity/expression. However, AT1aR is required for angiotensin II--induced hyperpolarization of basolateral membrane of PT and DCT. Deletion of AT1aR had no effect on baseline renal outer medullary potassium channel activity but increased ENaC activity in the CCD. [ABSTRACT FROM AUTHOR]- Published
- 2024
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41. Preparation of IgE Antibody and Distribution of IgE+ Secretory Cells in the Palatine Tonsil of Bactrian Camel
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Li-Ping, Liu, Min, Li, Wang-Dong, Zhang, and Wen-Hui, Wang
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Structural Biology ,General Medicine ,Biochemistry - Abstract
Background: Allergic diseases induced by dust have seriously threatened human health, while Bactrian camels can live in a sandy environment for a long time. Objective: To prepare rabbit anti-Bactrian camel IgE antibody and explore the distribution characteristics of IgE+ secretory cells in the palatine tonsils, which lays a theoretical foundation for the distribution of local antibodies in the palatal tonsils of Bactrian camel and the study of immune function. Methods: In this study, the amino acid sequences of Bactrian camel IgE, IgA, IgM and IgG heavy chain constant regions were compared, and a specific IgE gene fragment were selected (447 bp). The recombinant plasmid pET-28a-IgE was induced in Escherichia coli BL21(DE3) by IPTG and its expression conditions were optimized. The antibody was prepared by immunizing rabbits with purified IgE recombinant protein, its titer and specificity were detected by indirect ELISA and Western blotting. Immunohistochemical and statistical methods investigated the distribution of IgE+ secretory cells in the palatine tonsils. Results: The IgE recombinant protein was expressed in the form of inclusion bodies with a size of 16 kDa. The optimal IPTG induction concentration was 0.7 mmol/L and the induction time was 8 h. The titer of the antibody was 1:16000 by ELISA, and the antibody could specifically bind to the recombinant protein by Western blotting. IgE+ secretory cells were mainly distributed in the subepithelial compartments of reticulated crypt epithelium of the palatine tonsil of the Bactrian camel, followed by the subepithelial compartments of stratified squamous epithelium and occasionally in the extrafollicular region. Conclusion: The rabbit anti-Bactrian camel IgE polyclonal antibody was successfully prepared. It is confirmed that IgE exists in the palatine tonsils of Bactrian camels under normal living conditions. In addition, IgE+ secretory cells are mainly distributed in the subepithelial compartments of reticulated crypt epithelium of the palatine tonsil, which is consistent with the distribution characteristics of IgG+ and sIgA+ secretory cells in the palatal tonsils of the Bactrian camel.
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- 2023
42. Inwardly rectifying K
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Wen-Hui, Wang and Dao-Hong, Lin
- Subjects
Kidney Tubules ,Sodium ,Nephrons ,Potassium Channels, Inwardly Rectifying ,Kidney Tubules, Distal ,Membrane Potentials - Abstract
The inwardly rectifying potassium channel (Kir) 4.1 (encoded by
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- 2023
43. Inwardly rectifying K+ channels 4.1 and 5.1 (Kir4.1/Kir5.1) in the renal distal nephron
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Wen-Hui Wang and Dao-Hong Lin
- Subjects
Physiology ,Cell Biology - Abstract
The inwardly rectifying potassium channel (Kir) 4.1 (encoded by KCNJ10) interacts with Kir5.1 (encoded by KCNJ16) to form a major basolateral K+ channel in the renal distal convoluted tubule (DCT), connecting tubule (CNT), and the cortical collecting duct (CCD). Kir4.1/Kir5.1 heterotetramer plays an important role in regulating Na+ and K+ transport in the DCT, CNT, and CCD. A recent development in the field has firmly established the role of Kir4.1/Kir5.1 heterotetramer of the DCT in the regulation of thiazide-sensitive Na-Cl cotransporter (NCC). Changes in Kir4.1/Kir5.1 activity of the DCT are an essential step for the regulation of NCC expression/activity induced by dietary K+ and Na+ intakes and play a role in modulating NCC by type 2 angiotensin II receptor (AT2R), bradykinin type II receptor (BK2R), and β-adrenergic receptor. Since NCC activity determines the Na+ delivery rate to the aldosterone-sensitive distal nephron (ASDN), a distal nephron segment from late DCT to CCD, Kir4.1/Kir5.1 activity plays a critical role not only in the regulation of renal Na+ absorption but also in modulating renal K+ excretion and maintaining K+ homeostasis. Thus, Kir4.1/Kir5.1 activity serves as an important component of renal K+ sensing mechanism. The main focus of this review is to provide an overview regarding the role of Kir4.1 and Kir5.1 of the DCT and CCD in the regulation of renal K+ excretion and Na+ absorption.
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- 2022
44. Role of inwardly rectifying K+ channel 5.1 (Kir5.1) in the regulation of renal membrane transport
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Dao-Hong, Lin, Xin-Peng, Duan, Jun-Ya, Zheng, and Wen-Hui, Wang
- Subjects
Bicarbonates ,Mice ,Ion Transport ,Kidney Tubules ,Nephrology ,Sodium ,Internal Medicine ,Animals ,Humans ,Potassium Channels, Inwardly Rectifying ,Kidney Tubules, Distal - Abstract
Kir5.1 interacts with Kir4.2 in proximal tubule and with Kir4.1 in distal convoluted tubule (DCT), connecting tubule (CNT) and cortical collecting duct (CCD) to form basolateral-K+-channels. Kir4.2/Kir5.1 and Kir4.1/Kir5.1 play an important role in regulating Na+/HCO3--transport of the proximal tubule and Na+/K+ -transport in the DCT/CNT/CCD. The main focus of this review is to provide an overview of the recent development in the field regarding the role of Kir5.1 regulating renal electrolyte transport in the proximal tubule and DCT.Loss-of-function-mutations of KCNJ16 cause a new form of tubulopathy, characterized by hypokalaemia, Na+-wasting, acid-base-imbalance and metabolic-acidosis. Abnormal bicarbonate transport induced by loss-of-function of KCNJ16-mutants is recapitulated in Kir4.2-knockout-(Kir4.2 KO) mice. Deletion of Kir5.1 also abolishes the effect of dietary Na+ and K+-intakes on the basolateral membrane voltage and NCC expression/activity. Long-term high-salt intake or high-K+-intake causes hyperkalaemic in Kir5.1-deficient mice.Kir4.2/Kir5.1 activity in the proximal tubule plays a key role in regulating Na+, K+ and bicarbonate-transport through regulating electrogenic-Na+-bicarbonate-cotransporter-(NBCe1) and type 3-Na+/H+-exchanger-(NHE3). Kir4.1/Kir5.1 activity of the DCT plays a critical role in mediating the effect of dietary-K+ and Na+-intakes on NCC activity/expression. As NCC determines the Na+ delivery rate to the aldosterone-sensitive distal nephron (ASDN), defective regulation of NCC during high-salt and high-K+ compromises renal K+ excretion and K+ homeostasis.
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- 2022
45. Research progress of clinical intervention and nursing for patients with post-stroke dysphagia
- Author
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Wen-juan Fang, Fei Zheng, Lin-zhi Zhang, Wen-hui Wang, Cheng-chen Yu, Juan Shao, and Yi-jin Wu
- Subjects
Stroke ,Psychiatry and Mental health ,Quality of Life ,Stroke Rehabilitation ,Humans ,Neurology (clinical) ,Dermatology ,General Medicine ,Deglutition Disorders ,Deglutition - Abstract
Post-stroke dysphagia (PSD) is a common and costly complication of stroke and is associated with increased mortality, morbidity, and hospitalization. Although most patients can spontaneously resume swallowing, there are still many patients who do not recover and even die. Despite multiple advances in the acute treatment and secondary prevention of stroke, the effective treatment of PSD remains a neglected area. Studies have shown that repair mechanisms of neurostimulation techniques and increased cortical activity play an important role in the treatment of PSD. In addition, nutritional interventions are also crucial for the treatment of malnutrition in PSD patients. Therefore, this article reviews the effects of the current main clinical treatment methods and nutritional interventions on the treatment and rehabilitation of PSD patients. It also emphasized the necessity of developing an individualized care plan for PSD patients, which is of great significance to promote the clinical treatment, nutritional status, prognosis, and quality of life of PSD patients.
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- 2022
46. Adenosine stimulates the basolateral 50pS K+ channel in renal proximal tubule via adenosine-A1 receptor.
- Author
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Hao Liu, Qi Sun, Zheng Ding, Wensen Shi, Wen-Hui Wang, and Chengbiao Zhang
- Subjects
ADENOSINES ,PROXIMAL kidney tubules ,PROTEIN kinase C ,PHOSPHOLIPASE C ,PHOSPHOLIPASE A2 ,KIDNEY tubules ,POTASSIUM channels - Abstract
Background: The basolateral potassium channels play an important role in maintaining the membrane transport in the renal proximal tubules (PT) and adenosine receptors have been shown to regulate the trans-epithelial Na+ absorption in the PT. The aim of the present study is to explore whether adenosine also regulates the basolateral K
+ channel of the PT and to determine the adenosine receptor type and the signaling pathway which mediates the effect of adenosine on the K+ channel. Methods: We have used the single channel recording to examine the basolateral K+ channel activity in the proximal tubules of the mouse kidney. All experiments were performed in cell-attached patches. Results: Single channel recording has detected a 50 pS inwardly-rectifying K+ channel with high channel open probability and this 50 pS K+ channel is a predominant type K+ channel in the basolateral membrane of the mouse PT. Adding adenosine increased 50 pS K+ channel activity in cell-attached patches, defined by NPo (a product of channel Numbers and Open Probability). The adenosine-induced stimulation of the 50 pS K+ channel was absent in the PT pretreated with DPCPX, a selective inhibitor of adenosine A1 receptor. In contrast, adenosine was still able to stimulate the 50 pS K+ channel in the PT pretreated with CP-66713, a selective adenosine A2 receptor antagonist. This suggests that the stimulatory effect of adenosine on the 50 pS K+ channel of the PT was mediated by adenosine-A1 receptor. Moreover, the effect of adenosine on the 50 pS K+ channel was blocked in the PT pretreated with U-73122 or Calphostin C, suggesting that adenosine-induced stimulation of the 50 pS K+ channels of the PT was due to the activation of phospholipase C (PLC) and protein kinase C (PKC) pathway. In contrast, the inhibition of phospholipase A2 (PLA2) with AACOCF3 or inhibition of protein kinase A (PKA) with H8 failed to block the adenosine-induced stimulation of the 50 pS K+ channel of the PT. Conclusion: We conclude that adenosine activates the 50 pS K+ channels in the basolateral membrane of PT via adenosine-A1 receptor. Furthermore, the effect of adenosine on the 50 pS K+ channel is mediated by PLC-PKC signaling pathway. [ABSTRACT FROM AUTHOR]- Published
- 2023
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47. Dietary potassium restriction reprograms the distal tubule causing adverse metabolic consequences
- Author
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Xiao-Tong Su, Jeremiah Reyes, Ryan Cornelius, Xin-Peng Duan, Wen-Hui Wang, James McCormick, Chao-Ling Yang, Jonathan Nelson, and David Ellison
- Subjects
Physiology - Abstract
Low potassium (K) intake has adverse health effects, including hypertension, osteoporosis, and nephrolithiasis. Dietary K restriction rapidly activates a K switch in the distal nephron to maintain homeostasis by reducing K excretion and activating the sodium chloride cotransporter (NCC). The distal convoluted tubule (DCT) is morphologically and functionally divided into DCT1 and DCT2, with each segment specialized for a different function. Here, we define the differences between DCT1 and DCT2 transcriptionally, examine their unique responses to potassium restriction, and detrimental physiological responses in mice.The K restriction effects were examined at 3 time points, overnight (acute), 4 days (short-term), and 4 weeks (chronic). Electrophysiology was used to assess effects of acute K deprivation on basolateral K channel (Kir4.1/5.1) activity. To determine effects of K restriction for 4 days, the DCT-targeted single-nucleus RNA-sequencing (snRNAseq) approach was applied. Female NCC-Cre-INTACT (PMID: 26087164) mice were provided either normal (NK) or K deficient (KD) diet for 4 days (short-term) and kidneys were snap-frozen for targeted snRNAseq (10X Chromium, NovaSeq) (3 mice per diet, 10,000 nuclei per mouse). Effects of chronic K-restriction were assessed by serum electrolytes, tissue clearing, and western blot.Acute K restriction stimulated basolateral K channel activity in DCT1, but not in DCT2, indicating that DCT1 and DCT2 respond differently. Although both DCT1 and DCT2 express NCC, snRNAseq data showed that DCT1 and DCT2 have distinct transcriptional signatures, with DCT1 expressing genes involved in magnesium reabsorption, and DCT2 expressing genes involved in calcium reabsorption and electrogenic sodium channel (ENaC). Four days of K restriction switched the DCT from a K-wasting state to K-sparing state, shown by reduction of gENaC ( Scnn1g) and Kallikrein ( Klk1) expression. Furthermore, K restriction decreased the expression of the calcium-handling genes Slc8a1, Calb and Vdr. When prolonged, K restriction led to increases in NCC, reduction in ENaC cleavage, and elongation of the DCT. It also led to calcium wasting (plasma iCa in NK, 1.38 ± 0.03, n=7; KD, 1.24 ± 0.01 mM, n=6) and reduction in calbindin D-28k protein.Our results suggest that DCT1 and DCT2 both express NCC, but have distinct transcriptomic signatures with unique roles in magnesium and calcium transport, respectively. Dietary K restriction reprograms DCT2 cells to be more like DCT1 cells, thereby maintaining K balance but contributing to calcium wasting as a complication. NIH DK51496, NIH DK054983, VA 1I01BX002228, LeDucq Fondation This is the full abstract presented at the American Physiology Summit 2023 meeting and is only available in HTML format. There are no additional versions or additional content available for this abstract. Physiology was not involved in the peer review process.
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- 2023
48. Rational design of Sn4P3/Ti3C2Tx composite anode with enhanced performance for potassium-ion battery
- Author
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Jie Zhao, Chao-Lin Li, Gang Chen, Fei Ji, Yi-Yong Shen, Juan Peng, and Wen-Hui Wang
- Subjects
Materials Chemistry ,Metals and Alloys ,Physical and Theoretical Chemistry ,Condensed Matter Physics - Published
- 2022
49. ROMK channels are inhibited in the aldosterone-sensitive distal nephron of renal tubule Nedd4-2-deficient mice
- Author
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Wen-Hui Wang, Xin-Peng Duan, Dan-Dan Zhang, Dao-Hong Lin, and Jun-Ya Zheng
- Subjects
Epithelial sodium channel ,Male ,medicine.medical_specialty ,Normal diet ,Physiology ,Nedd4 Ubiquitin Protein Ligases ,NEDD4 ,macromolecular substances ,Membrane Potentials ,chemistry.chemical_compound ,Internal medicine ,medicine ,Animals ,Distal convoluted tubule ,Potassium Channels, Inwardly Rectifying ,Sodium Chloride, Dietary ,Epithelial Sodium Channels ,Kidney Tubules, Distal ,Aldosterone ,Mice, Knockout ,urogenital system ,Potassium, Dietary ,Diet, Sodium-Restricted ,WNK1 ,medicine.anatomical_structure ,Endocrinology ,chemistry ,Knockout mouse ,ROMK ,Research Article - Abstract
We used whole cell recording to examine the renal outer medullary K(+) channel (ROMK or Kir1.1) and epithelial Na(+) channel (ENaC) in the late distal convoluted tubule (DCT2)/initial connecting tubule ((i)CNT) and in the cortical collecting duct (CCD) of kidney tubule-specific neural precursor cell-expressed developmentally downregulated protein 4-2 (Nedd4-2) knockout mice (Ks-Nedd4-2 KO) and floxed neural precursor cell-expressed developmentally downregulated 4-like (Nedd4l) mice (control). Tertiapin Q (TPNQ)-sensitive K(+) currents (ROMK) were smaller in both the DCT2/(i)CNT and CCD of Ks-Nedd4-2 KO mice on a normal diet than in control mice. Neither high dietary salt intake nor low dietary salt intake had a significant effect on ROMK activity in the DCT2/(i)CNT and CCD of control and Ks-Nedd4-2 KO mice. In contrast, high dietary K(+) intake (HK) increased, whereas low dietary K(+) intake (LK) decreased TPNQ-sensitive K(+) currents in floxed Nedd4l mice. However, the effects of dietary K(+) intake on ROMK channel activity were absent in Ks-Nedd4-2 KO mice since neither HK nor LK significantly affected TPNQ-sensitive K(+) currents in the DCT2/(i)CNT and CCD. Moreover, TPNQ-sensitive K(+) currents in the DCT2/(i)CNT and CCD of Ks-Nedd4-2 KO mice on HK were similar to those of control mice on LK. Amiloride-sensitive Na(+) currents in the DCT2/(i)CNT and CCD were significantly higher in Ks-Nedd4-2 KO mice than in floxed Nedd4l mice on a normal K(+) diet. HK increased ENaC activity of the DCT2/(i)CNT only in control mice, but HK stimulated ENaC of the CCD in both control and Ks-Nedd4-2 KO mice. Moreover, the HK-induced increase in amiloride-sensitive Na(+) currents was larger in Ks-Nedd4-2 KO mice than in control mice. Deletion of Nedd4-2 increased with no lysine kinase 1 expression and abolished HK-induced inhibition of with no lysine kinase 1. We conclude that deletion of Nedd4-2 increases ENaC activity but decreases ROMK activity in the aldosterone-sensitive distal nephron and that HK fails to stimulate ROMK, but robustly increases ENaC activity in the CCD of Nedd4-2-deficient mice. NEW & NOTEWORTHY We demonstrate that renal outer medullary K(+) (ROMK) channel activity is inhibited in the late distal convoluted tubule/initial connecting tubule and cortical collecting duct of neural precursor cell-expressed developmentally downregulated protein 4-2 (Nedd4-2)-deficient mice. Also, deletion of Nedd4-2 abolishes the stimulatory effect of dietary K(+) intake on ROMK. The lack of high K(+)-induced stimulation of ROMK is associated with the absence of high K(+)-induced inhibition of with no lysine kinase 1.
- Published
- 2023
50. Endovascular treatment of large hemoptysis for pulmonary pseudoaneurysm: Report of 23 cases
- Author
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Fen-Qiang Li, Dong-Jun Su, Wan-Jia Zhang, Zhong-Ke Chen, Geng-Xiang Li, Shuang-Xi Li, Yu-xing Peng, Lei Dang, and Wen-Hui Wang
- Abstract
Purpose: To evaluate the safety and effectiveness of endovascular treatment for massive hemoptysis caused by pulmonary pseudoaneurysm (PAP). Methods: The clinical data, imaging data, and endovascular treatment of 23 patients with massive hemoptysis caused by continuous PAP were retrospectively analyzed. The success, complication, postoperative recurrence rate, and influence of the treatment on pulmonary artery pressure were also evaluated. Results:Nineteen patients with bronchial artery (BA) or NBSA-PA fistula underwent bronchial artery embolization (BAE) + non-bronchial systemic artery embolization (NBSAE) + pulmonary artery embolization (PAE). The pulmonary artery (PA) pressures before and after embolization were 52.11±2.12 (35-69 cmH2O) and 33.58±1.63 (22-44 cmH2O), respectively (P=0.001). Four patients did not have BA or NBSA-PA fistula. Embolization was performed in two patients with distal pulmonalis lobar arteria PAP. Bare stent-assisted micro coil embolization was performed in the other two patients with PAP of main pulmonalis lobar arteria. The PA pressures of the four patients before and after treatment were 24.50±1.32 (22-28 cmH2O) and 24.75±1.70 (22-29 cmH2O), respectively (P=0.850). The technique had 100% success rate with no serious complications and a postoperative recurrence rate of 30%. Conclusion: Endovascular treatment is safe and effective for massive hemoptysis caused by PAP. The presence of BA or NBSA-PA fistula, BAE, or NBSAE can effectively reduce pulmonary hypertension.
- Published
- 2022
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