16 results on '"Nong K"'
Search Results
2. Mixed impact of Xpert® MTB/RIF on tuberculosis diagnosis in Cambodia
- Author
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Auld, S. C., primary, Moore, B. K., additional, Kyle, R. P., additional, Eng, B., additional, Nong, K., additional, Pevzner, E. S., additional, Eam, K. K., additional, Eang, M. T., additional, and Killam, W. P., additional
- Published
- 2016
- Full Text
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3. Rollout of Xpert® MTB/RIF in Northwest Cambodia for the diagnosis of tuberculosis among PLHA
- Author
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Auld, S. C., primary, Moore, B. K., additional, Killam, W. P., additional, Eng, B., additional, Nong, K., additional, Pevzner, E. C., additional, Eam, K. K., additional, Eang, M. T., additional, Warren, D., additional, and Whitehead, S. J., additional
- Published
- 2014
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4. Potential effects and mechanism of flavonoids extract of Callicarpa nudiflora Hook on DSS-induced colitis in mice.
- Author
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Nong K, Qin X, Liu Z, Wang Z, Wu Y, Zhang B, Chen W, Fang X, Liu Y, Wang X, and Zhang H
- Subjects
- Animals, Male, Mice, Colitis, Ulcerative drug therapy, Colitis, Ulcerative chemically induced, Gastrointestinal Microbiome drug effects, Anti-Inflammatory Agents pharmacology, Cytokines metabolism, Plant Leaves chemistry, NF-kappa B metabolism, Mice, Inbred C57BL, Disease Models, Animal, Dextran Sulfate, Plant Extracts pharmacology, Flavonoids pharmacology, Callicarpa chemistry
- Abstract
Callicarpa nudiflora Hook (C. nudiflora) is an anti-inflammatory, antimicrobial, antioxidant, and hemostatic ethnomedicine. To date, little has been reported regarding the activity of C. nudiflora against ulcerative colitis (UC). In this study, we investigated the effect of a flavonoid extract of C. nudiflora on Dextran Sulfate Sodium (DSS)-induced ulcerative colitis in mice. Mice in the treatment group (CNLF+DSS group) and drug-only (CNLF group) groups were administered 400 mg/kg of flavonoid extract of C. nudiflora leaf (CNLF), and drinking water containing 2.5 % DSS was given to the model and treatment groups. The symptoms of colitis were detected, relevant indicators were verified, intestinal barrier function was assessed, and the contents of the cecum were analyzed for intestinal microorganisms. The results showed that CNLF significantly alleviated the clinical symptoms and histological morphology of colitis in mice, inhibited the increase in pro-inflammatory factors (TNF-α, IL-6, IL-1β, and IFN-γ), and increased the level of IL-10. The expression of NF-κB and MAPK inflammatory signal pathway-related proteins (p-p65, p-p38, p-ERK, p-JNK) was regulated. The expression of tight junction proteins (ZO-1, OCLDN, and CLDN1) was increased, while the content of D-LA, DAO, and LPS was decreased. In addition, 16S rRNA sequencing showed that CNLF restored the gut microbial composition, and increased the relative abundance of Prevotellaceae, Intestinimonas butyriciproducens, and Barnesiella_intestinihominis. In conclusion, CNLF alleviated colitis by suppressing inflammation levels, improving intestinal barrier integrity, and modulating the intestinal microbiota, and therefore has promising future applications in the treatment of UC., Competing Interests: Declaration of competing interest All co-authors have seen and agreed with the contents of the manuscript and there is no conflict of interest to report., (Copyright © 2024 Elsevier GmbH. All rights reserved.)
- Published
- 2024
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5. Effect of purple sweet potato-derived anthocyanins on heat stress response in Wenchang chickens and preliminary mechanism study.
- Author
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Fang X, Nong K, Qin X, Liu Z, Gao F, Jing Y, Fan H, Wang Z, Wang X, and Zhang H
- Subjects
- Animals, Anthocyanins pharmacology, Chickens, RNA, Ribosomal, 16S, Heat-Shock Response, Cytokines, Body Weight, Lipids, Hot Temperature, Dietary Supplements, Antioxidants metabolism, Ipomoea batatas chemistry, Ipomoea batatas metabolism
- Abstract
This study was conducted to investigate the beneficial effect of purple sweet potato anthocyanins (PSPA) on growth performance, oxidative status, immune response, intestinal morphology, and intestinal flora homeostasis in heat-stressed Wenchang chickens. A total of 100 Wenchang chickens (50-day-old) were randomly assigned to 5 groups, including the thermoneutral environment (TN) group (26°C); high-temperature stressed (HS) group (33°C ± 1°C); low-dose PSPA treatment (L_HS) group (8 mg/kg body weight, 33°C ± 1°C); medium-dose PSPA treatment (M_HS) group and high-dose PSPA treatment (H_HS) group (16 mg/kg and 32 mg/kg body weight, respectively, 33°C ± 1°C). The results showed that PSPA reversed the adverse effects of heat stress on growth performance, meat quality, and carcass characteristics. And the effect was associated with the concentration of PSPA partially. Heat stress increased the serum lipids of Wenchang chickens. LDL-C, TG, TC, and FFA in the serum were significantly decreased, and HDL-C and LPS in the serum were increased by PSPA treatment. The digestive enzymes in duodenal chyme were significantly (P < 0.05) increased by PSPA treatment. And PSPA treatment significantly (P < 0.05) enhanced the redox status by improving antioxidant parameters (GSH-Px and SOD) and decreasing the MDA level in the serum and liver. Moreover, the level of inflammatory cytokines was significantly (P < 0.05) regulated by PSPA treatment compared to the HS group. The villus length and goblet cell numbers after PSPA treatment were significantly higher than HS group. Furthermore, PSPA also played protection on the intestine structure by decreasing the level of D-LA and DAO. 16S rRNA sequencing revealed the microbial composition was altered by PSPA, and Acetanaerobacterium and Oscillibacter were dominant in the H_HS group. Microbial functional prediction indicated that function pathways based on KEGG and metacyc database were regulated by PSPA, and intestinal flora correlated with metabolic function significantly. The spearman correlation analysis showed that Saccharibacteria and Clostridium_IV correlated with the serum lipids, antioxidant, and inflammatory cytokines. Collectively, these findings suggest that PSPA has a positive effect against heat stress in poultry., (Copyright © 2023. Published by Elsevier Inc.)
- Published
- 2023
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6. Exercise for sarcopenia in older people: A systematic review and network meta-analysis.
- Author
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Shen Y, Shi Q, Nong K, Li S, Yue J, Huang J, Dong B, Beauchamp M, and Hao Q
- Subjects
- Female, Humans, Aged, Network Meta-Analysis, Exercise physiology, Exercise Therapy, Muscle Strength physiology, Sarcopenia therapy
- Abstract
Background: Sarcopenia is a serious public health concern among older adults worldwide. Exercise is the most common intervention for sarcopenia. This study aimed to compare the effectiveness of different exercise types for older adults with sarcopenia., Methods: Randomized controlled trials (RCTs) that examined the effectiveness of exercise interventions on patient-important outcomes for older adults with sarcopenia were eligible. We systematically searched MEDLINE, Embase and Cochrane Central Register of Controlled Trials via Ovid until 3 June 2022. We used frequentist random-effects network meta-analyses to summarize the evidence and applied the Grading of Recommendations, Assessment, Development, and Evaluations framework to rate the certainty of evidence., Results: Our search identified 5988 citations, of which 42 RCTs proved eligible with 3728 participants with sarcopenia (median age: 72.9 years, female: 73.3%) with a median follow-up of 12 weeks. We are interested in patient-important outcomes that include mortality, quality of life, muscle strength and physical function measures. High or moderate certainty evidence suggested that resistance exercise with or without nutrition and the combination of resistance exercise with aerobic and balance training were the most effective interventions for improving quality of life compared to usual care (standardized mean difference from 0.68 to 1.11). Moderate certainty evidence showed that resistance and balance exercise plus nutrition (mean difference [MD]: 4.19 kg) was the most effective for improving handgrip strength (minimally important difference [MID]: 5 kg). Resistance and balance exercise with or without nutrition (MD: 0.16 m/s, moderate) were the most effective for improving physical function measured by usual gait speed (MID: 0.1 m/s). Moderate certainty evidence showed that resistance and balance exercise (MD: 1.85 s) was intermediately effective for improving physical function measured by timed up and go test (MID: 2.1 s). High certainty evidence showed that resistance and aerobic, or resistance and balance, or resistance and aerobic exercise plus nutrition (MD from 1.72 to 2.28 s) were intermediately effective for improving physical function measured by the five-repetition chair stand test (MID: 2.3 s)., Conclusions: In older adults with sarcopenia, high or moderate certainty evidence showed that resistance exercise with or without nutrition and the combination of resistance exercise with aerobic and balance training were the most effective interventions for improving quality of life. Adding nutritional interventions to exercise had a larger effect on handgrip strength than exercise alone while showing a similar effect on other physical function measures., (© 2023 The Authors. Journal of Cachexia, Sarcopenia and Muscle published by John Wiley & Sons Ltd on behalf of Society on Sarcopenia, Cachexia and Wasting Disorders.)
- Published
- 2023
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7. Effects of the Vitamin D3 on Alleviating the Oxidative Stress Induced by Diquat in Wenchang Chickens.
- Author
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Nong K, Liu Y, Fang X, Qin X, Liu Z, and Zhang H
- Abstract
Vitamin D
3 (VD3 ) is an indispensable micronutrient in livestock and poultry feed. Its function in antioxidant stress has been reported. We investigate whether the addition of different concentrations of VD3 to the diet affects the production performance, slaughter performance, meat quality, organ index, and gut injury on the diquat (DQ)-induced model of oxidative stress in Wenchang chickens. Four hundred and eighty one-day-old chickens were randomly divided into six groups: control (basal diet), 4000 VD (basal diet + VD3 4000 IU per kg feed intake), 1000 VD+DI (DQ, basal diet + VD3 1000 IU per kg feed intake), 2000 VD+DI (DQ, basal diet + VD3 2000 IU per kg feed intake), and 4000 VD+DI (DQ, basal diet + VD3 4000 IU per kg feed intake). The results showed that the addition of VD3 to the diet promoted DQ-induced weight loss and reduced ADFI, slaughter rate, splenic index, and pH after 1 h and 24 h in the leg muscles. VD3 decreased the increase in content of interleukin-1β (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α) among proinflammatory cytokines ( p < 0.05) and increased the reduction in anti-inflammatory cytokines content of interleukin-10 (IL-10) ( p < 0.05) induced by DQ. In addition, liver and kidney injury biomarkers and the intestinal permeability index in serum were disordered after treatment with DQ ( p < 0.05). VD3 perfected the increase of D-lactic acid (D-LA), diamine oxidase (DAO), total cholesterol (T-CHO), creatinine (CR), blood urea nitrogen (BUN), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C) content, aspartate transaminase (AST), alanine transaminase (ALT), and lactate dehydrogenase (LDH) activity ( p < 0.05); it increased the decrease of albumin (ALB) content ( p < 0.05). Meanwhile, VD3 regulated the intestinal morphology and intestinal barrier. Moreover, DQ induced a decrease in total antioxidant capacity and antioxidant enzyme activity in the serum, liver, and jejunum ( p < 0.05), and an increase in malonaldehyde (MDA) content ( p < 0.05). However, the addition of different levels of VD3 could alleviate the above phenomenon of oxidative stress in Wenchang chickens to different degrees. Thus, this research suggested that the addition of VD3 can relieve the DQ-induced oxidative stress of Wenchang chickens, and the level of VD3 acquisition is positively correlated with the remission effect.- Published
- 2023
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8. Clinical Status of Cardiac Rehabilitation Manners and Models.
- Author
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Wei W, Zhao J, Meng L, Wang X, Wei H, Nong K, Li J, Wang Z, Shen J, He S, and Yang L
- Abstract
Cardiac rehabilitation, which combines cardiology and preventive medicine, is an important part of treatment for cardiovascular diseases. Systematically, cardiac rehabilitation, including simultaneously inhibiting endothelial injury and promoting endothelial repair, is beneficial for physical and mental recovery and reduces the risks of recurrence and death in patients with cardiovascular diseases. Cardiac rehabilitation has developed rapidly in the last 50 years. A preliminary system for cardiac rehabilitation has been developed in China. The present article mainly focuses on the progress of cardiac rehabilitation from the aspects of goals, measures, and modes of research in the current scenario., Competing Interests: The authors declare that this research was conducted in the absence of any commercial or financial relationships that could be construed as potential conflicts of interest., (Copyright © 2022 Wei Wei et al.)
- Published
- 2022
- Full Text
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9. A Novel Technique to Optimize Uniportal Thoracoscopic Right Middle Lobectomy.
- Author
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Zhang H, Yang YS, Nong K, Gu YM, Chen LQ, and Wang WP
- Subjects
- Humans, Lung, Thoracic Surgery, Video-Assisted methods, Lung Neoplasms diagnostic imaging, Lung Neoplasms surgery, Pneumonectomy methods
- Abstract
The study aimed to describe a novel port design and simple surgical strategy for uniportal thoracoscopic right middle lobectomy. In this approach, a 3- to 4-cm incision was created at the sixth intercostal space posterior to the scapular line. The surgery was performed by serial division of the anterior oblique fissure, vein, bronchus, artery, and horizontal fissure. Based on our preliminary experience, this approach could provide an appropriate direction and angle for dissection and stapling, solving the challenge of conventional uniportal right middle lobectomy., (Copyright © 2022 The Society of Thoracic Surgeons. Published by Elsevier Inc. All rights reserved.)
- Published
- 2022
- Full Text
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10. Analysis of pancreatic fistula risk in patients with laparoscopic pancreatoduodenectomy: what matters.
- Author
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Nong K, Zhang Y, Liu S, Yang Y, Sun D, and Chen X
- Subjects
- Aged, Humans, Pancreas surgery, Pancreaticoduodenectomy adverse effects, Postoperative Complications etiology, Retrospective Studies, Risk Factors, Laparoscopy, Pancreatic Fistula etiology
- Abstract
Objective: To analyse potential risk factors for postoperative pancreatic fistula (POPF)., Methods: A retrospective study on risk factors for POPF was conducted in patients undergoing laparoscopic pancreatoduodenectomy. Basic characteristics, and preoperative, intraoperative and postoperative patient data were collected and analysed., Results: A total of 268 patients were enrolled in this study, including 54 patients with POPF following surgery (POPF incidence, 20.15%). Univariate analysis indicated that patient's age, body mass index (BMI), preoperative bilirubin level, pancreas texture, and drainage fluid amylase level on day 1 following surgery were associated with POPF. Multiple logistic regression analysis indicated that preoperative bilirubin level ≥170 µmol/l, soft pancreas texture, BMI ≥25, and age ≥65 years were independent risk factors associated with POPF., Conclusions: For patients with preoperative bilirubin level ≥170 µmol/l, soft pancreas texture, BMI ≥25 and age ≥65 years, clinically relevant measures should be taken as early as possible for the prophylaxis of POPF.
- Published
- 2020
- Full Text
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11. MicroRNA-519 inhibits hypoxia-induced tumorigenesis of pancreatic cancer by regulating immune checkpoint PD-L1.
- Author
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Nong K, Zhang D, Chen C, Yang Y, Yang Y, Liu S, and Cai H
- Abstract
Pancreatic cancer is highly prevalent and exhibits a high incidence and mortality rate. Hypoxia contributes to tumorigenesis and the progression of pancreatic cancer. To the best of our knowledge, the role of microRNA (miR)-519 has not been investigated in hypoxia-induced pancreatic cancer progression. The purpose of the present study was to elucidate the mechanism underlying miR-519-mediated regulation of pancreatic cancer progression. Reverse transcription-quantitative PCR and western blotting were performed to investigate miR-519 and programmed death ligand 1 (PD-L1) mRNA and protein levels, respectively. Additionally, a Transwell assay was performed to examine the invasiveness of PANC-1 and SW1990 cells. Cells were subsequently stained with Annexin V to determine the apoptotic rate of cells. Furthermore, bioinformatics analysis and a dual-luciferase reporter assay were performed to confirm the direct association between miR-519 and PD-L1, and a xenograft experiment was conducted to test the role of miR-519 in vivo . The results revealed that the expression levels of miR-519 in pancreatic cancer cells were reduced following hypoxia treatment. Furthermore, transfection with miR-519 mimics inhibited PANC-1 and SW1990 cell invasiveness, and induced apoptosis under hypoxic conditions. PD-L1 was also identified as a downstream target of miR-519, and rescued the miR-519 mimic-attenuated tumorigenesis of pancreatic cancer cells under hypoxic conditions. Additionally, treatment with miR-519 mimics significantly suppressed the tumor growth of PANC-1 cells. The results of the present study indicated a novel mechanism of miR-519-mediated tumorigenesis in pancreatic cancer cells under hypoxic conditions. The conclusions may be crucial for the improvement of future pancreatic cancer treatment., (Copyright: © Nong et al.)
- Published
- 2020
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12. Preparation of Porous Ceramsite with Ammonium Acetate as Low-Temperature Decomposition Foaming Agent and Its Sound Absorption Performance.
- Author
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Wu H, Huang H, Pan R, Chun Y, Zhu L, and Nong K
- Abstract
The sound absorption performance of porous ceramisite is determined by its pore structure, which is mainly governed by a foaming agent and heating rate during a foaming process. By tuning the heating rate and foaming agent concentration, ceramisite with different pore structures was prepared by using flyash, cement, quick lime, and plaster as raw materials as well as ammonium acetate as a low-temperature decomposition foaming agent in this work. The phase composition, microstructure, and sound absorption performance of the prepared porous ceramisite were investigated. Results demonstrate that the apparent porosity and the pore diameter increased with the increase of foaming agent concentration, accompanied with the broadening of the pore diameter distribution. The apparent porosity is positively correlated with heating rate until the temperature is higher than 20 °C·min
-1 , while the pore diameter is negatively correlated. The pore diameter distribution becomes narrow as a function of the heating rate. The sound absorption performance is positively correlated with the apparent porosity. An optimal pore diameter might exist, meaning diameter sizes that are larger or smaller than the optimal diameter are not conducive to the optimization of the sound absorption performance of the overall frequency band. It was determined that the curing time was not a key factor for optimizing the pore structure., Competing Interests: The authors declare no conflict of interest.- Published
- 2019
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13. Implementing a Health Confidence Tool at Time of Discharge.
- Author
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Mattingly TJ 2nd and Nong K
- Subjects
- Chronic Disease drug therapy, Health Behavior, Humans, Patient Discharge, Self Efficacy, Surveys and Questionnaires
- Published
- 2019
- Full Text
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14. Hepatoprotective effect of exosomes from human-induced pluripotent stem cell-derived mesenchymal stromal cells against hepatic ischemia-reperfusion injury in rats.
- Author
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Nong K, Wang W, Niu X, Hu B, Ma C, Bai Y, Wu B, Wang Y, and Ai K
- Subjects
- Alanine Transaminase blood, Animals, Apoptosis drug effects, Aspartate Aminotransferases blood, Caspase 3 metabolism, Enzyme-Linked Immunosorbent Assay, HMGB1 Protein metabolism, Humans, In Situ Nick-End Labeling, Inflammation therapy, Interleukin-6 metabolism, Liver metabolism, Male, Mesenchymal Stem Cells metabolism, Oxidative Stress, Rats, Rats, Sprague-Dawley, Reperfusion Injury pathology, Reperfusion Injury prevention & control, Superoxide Dismutase metabolism, Tumor Necrosis Factor-alpha metabolism, Cell- and Tissue-Based Therapy methods, Exosomes metabolism, Induced Pluripotent Stem Cells metabolism, Liver pathology, Necrosis therapy, Reperfusion Injury therapy
- Abstract
Background: This study aimed to evaluate the effect of exosomes produced by human-induced pluripotent stem cell-derived mesenchymal stromal cells (hiPSC-MSCs-Exo) on hepatic ischemia-reperfusion (I/R) injury., Methods: Exosomes were isolated and concentrated from conditioned medium using ultracentrifugation and ultrafiltration. hiPSC-MSCs-Exo were injected systemically via the inferior vena cava in a rat model of 70% warm hepatic I/R injury, and the therapeutic effect was evaluated. The serum levels of transaminases (aspartate aminotransferase [AST] and alanine aminotransferase [ALT]) were measured using an automatic analyzer. The expression of inflammatory factors was measured using enzyme-linked immunosorbent assay (ELISA). Histological changes indicated changes in pathology and inflammatory infiltration in liver tissue. Apoptosis of hepatic cells in liver tissue was measured using terminal-deoxynucleoitidyl transferase mediated nick end labeling (TUNEL) staining along with apoptotic markers., Results: hiPSCs were efficiently induced into hiPSC-MSCs with typical MSC characteristics. hiPSC-MSCs-Exo had diameters ranging from 50 to 60 nm and expressed exosomal markers (CD9, CD63 and CD81). Hepatocyte necrosis and sinusoidal congestion were markedly suppressed with a lower Suzuki score after hiPSC-MSCs-Exo administration. The levels of the hepatocyte injury markers AST and ALT were significantly lower in the treated group than in the control group. Inflammatory markers, such as tumor necrosis factor (TNF)-α, interleukin (IL)-6 and high mobility group box 1 (HMGB1), were significantly reduced after administration of hiPSC-MSCs-Exo, which suggests that the exosomes have a role in suppressing the inflammatory response. Additionally, in liver tissues from the experimental group, the levels of apoptotic markers, such as caspase-3 and bax, were significantly lower and the levels of oxidative markers, such as glutathione (GSH), glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD), were significantly higher than in the control group. These data point to an anti-apoptotic, anti-oxidative stress response role for hiPSC-MSCs-Exo., Conclusions: Our results demonstrated that hiPSC-MSCs-Exo alleviate hepatic I/R injury, possibly via suppression of inflammatory responses, attenuation of the oxidative stress response and inhibition of apoptosis., (Copyright © 2016 International Society for Cellular Therapy. Published by Elsevier Inc. All rights reserved.)
- Published
- 2016
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15. miR-212 promotes pancreatic cancer cell growth and invasion by targeting the hedgehog signaling pathway receptor patched-1.
- Author
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Ma C, Nong K, Wu B, Dong B, Bai Y, Zhu H, Wang W, Huang X, Yuan Z, and Ai K
- Subjects
- Carcinoma, Pancreatic Ductal metabolism, Cell Line, Tumor, Cell Movement, Cell Proliferation, Gene Expression, Humans, Pancreatic Neoplasms metabolism, Patched Receptors, Patched-1 Receptor, RNA Interference, Receptors, Cell Surface metabolism, Carcinoma, Pancreatic Ductal genetics, Gene Expression Regulation, Neoplastic, MicroRNAs genetics, Pancreatic Neoplasms genetics, Receptors, Cell Surface genetics
- Abstract
Background: microRNAs (miRNAs) are a class of small non-coding RNAs that play important roles in carcinogenesis. In the present study, we investigated the effect of miR-212 on pancreatic ductal adenocarcinoma (PDAC) and its target protein., Methods: Quantitative real-time PCR(qRT-PCR) was performed to detect the expression of miR-212 in PDAC tissues and pancreatic cancer cell lines. miR-212 mimic, miR-212 inhibitor and negative control were transfected into pancreatic cancer cells and the effect of miR-212 up-regulation and down-regulation on the proliferation, migration and invasion of cells were investigated. Furthermore, the mRNA and protein levels of Patched-1(PTCH1) were measured. Meanwhile, luciferase assays were performed to validate PTCH1 as miR-212 target in PDAC., Results: miR-212 was up-regulated in PDAC tissues and cells.Using both gain-of function and loss-of function experiments, a pro-oncogenic function of miR-212 was demonstrated in PDAC. Moreover, up-regulated of PTCH1 could attenuate the effect induced by miR-212., Conclusion: These data suggest that miR-212 could facilitate PDAC progression and metastasis through targeting PTCH1, implicating a novel mechanism for the progression of PDAC.
- Published
- 2014
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16. Silencing of DLGAP5 by siRNA significantly inhibits the proliferation and invasion of hepatocellular carcinoma cells.
- Author
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Liao W, Liu W, Yuan Q, Liu X, Ou Y, He S, Yuan S, Qin L, Chen Q, Nong K, Mei M, and Huang J
- Subjects
- Carcinoma, Hepatocellular metabolism, Carcinoma, Hepatocellular pathology, Cell Cycle genetics, Cell Line, Tumor, Cell Movement, Cell Proliferation, Cell Transformation, Neoplastic metabolism, Cell Transformation, Neoplastic pathology, DNA Methylation, Female, Humans, Liver metabolism, Liver pathology, Liver Neoplasms metabolism, Liver Neoplasms pathology, Male, Middle Aged, Neoplasm Proteins antagonists & inhibitors, Neoplasm Proteins metabolism, Promoter Regions, Genetic, RNA, Small Interfering genetics, RNA, Small Interfering metabolism, Carcinoma, Hepatocellular genetics, Cell Transformation, Neoplastic genetics, Gene Expression Regulation, Neoplastic, Liver Neoplasms genetics, Neoplasm Proteins genetics
- Abstract
Background: The dysregulation of oncogenes and tumor suppressor genes plays an important role in many cancers, including hepatocellular carcinoma (HCC), which is one of the most common cancers in the world. In a previous microarray experiment, we found that DLGAP5 is overexpressed in HCCs. However, whether the up-regulation of DLGAP5 contributes to hepatocarcinogenesis remains unclear., Methodology/principal Findings: In this study, we showed that DLGAP5 was significantly up-regulated in 76.4% (168 of 220) of the analyzed HCC specimens when compared with adjacent liver tissue. DLGAP5 overexpression was evident in 25% (22 of 88) of the HCC specimens without AFP expression, suggesting that DLGAP5 may be a novel biomarker for HCC pathogenesis. The silencing of DLGAP5 gene expression by RNA interference significantly suppressed cell growth, migration and colony formation in vitro. The expression level of DLGAP5 was also found to be related to the methylation level of its promoter in the HCC specimens., Conclusions/significance: Taken together, these data suggest that the expression of DLGAP5 is regulated by methylation and that the up-regulation of DLGAP5 contributes to HCC tumorigenesis by promoting cell proliferation.
- Published
- 2013
- Full Text
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