25 results on '"Haodong Xu"'
Search Results
2. Compact Broadband Low-Pass Filter with Novel Fishbone Structure Based on Spoof Surface Plasmon Polariton.
- Author
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Haodong Xu, Fushun Nian, Jianqin Deng, and Muzhi Gao
- Subjects
POLARITONS ,INSERTION loss (Telecommunication) - Abstract
A compact spoof surface plasmon polariton (SSPP) low-pass filter is proposed. By adopting a novel fishbone structure, the effective depth of the groove is increased, reducing the filter width by 24.84%. The length of the filter is reduced by 22.23% with a new transmission structure. To intuitively display this structure, the filter is designed and fabricated. The area of the filter is 47.44 mm×8 mm. The results demonstrate that the insertion and return losses are less than 3 dB and greater than 13 dB, respectively, in a wideband range of 0-10.00 GHz. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Estimating residential buildings' energy usage utilising a combination of Teaching--Learning--Based Optimization (TLBO)method with conventional prediction techniques.
- Author
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Senlin Zheng, Haodong Xu, Mukhtar, Azfarizal, Yasir, Ahmad Shah Hizam Md, and Khalilpoor, Nima
- Subjects
ENERGY consumption of buildings ,CONSTRUCTION cost estimates ,DWELLINGS ,ENERGY consumption ,COOLING loads (Mechanical engineering) ,HOME energy use ,ARTIFICIAL intelligence - Abstract
Among the most significant solutions suggested for estimating energy consumption and cooling load, one can refer to enhancing energy efficiency in non-residential and residential buildings. A structure's characteristics must be considered when estimating how much heating and cooling is required. To design and develop energy-efficient buildings, it can be helpful to research the characteristics of connected structures, such as the kinds of cooling and heating systems needed to ensure sui interior air quality. As an important part of energy consumption and demand of buildings, the assessment of cooling load conditions from the envelope of large buildings has not been comprehensively understood yet. In the present paper, a new conceptual system has been developed to anticipate cooling load in the sector of residential buildings. Also, the paper briefly describes the major models of the developed system to maintain continuity and concentrate on the prediction model of the cooling load. To predict cooling load, authors have modelled two methods of artificial neural network (ANN) and adaptive neuro-fuzzy inference system (ANFIS) in conjunction with teaching-learning-based optimization (TLBO). This article aims to illustrate how artificial intelligence (AI) approaches play an essential role in addressing the mentioned necessity and help estimate the optimal design parameters for various stations. The value of the multiple determination coefficient is also determined. The values of the training R² (coefficient of multiple determination) are 0.96446 and 0.97585 for TLBO-MLP and TLBO-ANFIS in the training stage and 0.95855 and 0.9721 in the testing stage, respectively, with an unknown dataset which is acceptable. The training RMSE values for TLBO-MLP and TLBO-ANFIS are 0.0685 and 0.11176 for training and 0.07074 and 0.12035 for testing, respectively, for the unknown dataset, which is acceptable. The lowest RMSE value and the higher R² value indicate the favourable accuracy of the TLBO-MLP technique. According to the high value of R² (97%) and the low value of RMSE, TLBO-MLP can predict residential buildings' cooling load. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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4. Imaging features of fungal pneumonia in haematopoietic stem cell transplant patients.
- Author
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Revels, Jonathan W., Fadl, Shaimaa A., Wang, Sherry S., Ladumor, Heta, Haodong Xu, and Kicska, Gregory
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HEMATOPOIETIC stem cells ,STEM cell transplantation ,HEMATOPOIETIC stem cell transplantation ,PNEUMONIA ,PULMONARY aspergillosis ,PNEUMOCYSTIS pneumonia ,DIAGNOSIS - Abstract
Patients who have received haematopoietic stem cell transplantation (HSCT) have a high rate of pulmonary complications, and in this immunosuppressed population, fungal pneumonia is of great concern. Fungal pneumonia can have a similar appearance to non-infectious pulmonary processes in HSCT patients, and radiologists should be familiar with the subtle features that may help to differentiate these disease entities. The focus of this article is on the diagnosis of fungal pneumonia in HSCT patients with an emphasis on radiologists’ roles in establishing the diagnosis of fungal pneumonia and the guidance of clinical management. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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5. Effect of the Earth's Rotation on Wellbore Trajectory and Method of Correction.
- Author
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Tengfei, Sun, Haodong, Xu, Zijie, Li, Bo, Zhao, Wenming, Li, and Yang, Zhang
- Subjects
ROTATION of the earth ,MECHANICAL models ,AZIMUTH ,PENDULUMS ,GRAVITY - Abstract
In this paper the method of mechanical modeling and formula derivation is applied to explains how earth rotation causes the apparent gravity action line to deviate from the ground plumb line. Analyzing the methods of the compass pendulum and the three-accelerometer and three-magnetometer survey, this paper demonstrates the principle that earth rotation causes well inclination error and azimuth error Based on the constructed simulated drilling trajectory, the actual measured inclination angle, azimuth angle, and measured depth errors are calculated. The paper presents methods for correcting the deviation error of the compass pendulum survey method and the deviation and azimuth error of the while-drilling survey method. Finally, the correcting method is applied to the actual measured data. The accuracy and reliability of the proposed error correcting method is verified by comparing the corrected data and actual data. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
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6. Recurrent Pulmonary Fibrosis in a Lung Allograft Secondary to Antisynthetase Syndrome.
- Author
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Scallan, Ciaran, Venado, Aida, Han, Lisa, Haodong Xu, Mulligan, Michael, Raghu, Ganesh, and Xu, Haodong
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PULMONARY fibrosis ,INTERSTITIAL lung diseases ,ANTISYNTHETASE syndrome ,LUNG transplantation ,HYDROXYCHLOROQUINE ,RITUXIMAB - Abstract
The article describes the case of a 51-year-old female with recurrent nonspecific interstitial pneumonia of the fibrotic pattern (NSIP-F) in the lung allograft and manifested de novo clinical and serological features of antisynthetase syndrome after bilateral lung transplantation for advanced idiopathic fibrotic NSIP. Topics discussed include progressive pulmonary fibrosis, connective tissue disease-associated interstitial lung disease, and treatment with hydroxychloroquine and rituximab.
- Published
- 2020
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7. Post-irradiation pericardial malignant mesothelioma with deletion of p16: a case report.
- Author
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Naeini, Yalda B., Arcega, Ramir, Hirschowitz, Sharon, Rao, Nagesh, and Haodong Xu
- Subjects
MESOTHELIOMA ,HODGKIN'S disease ,CANCER treatment ,THERAPEUTICS - Abstract
Malignant mesotheliomas are rather uncommon neoplasms associated primarily with asbestos exposure; however, they may also arise as second primary malignancies after radiation therapy, with a latency period of 15-25 years. Numerous studies have reported an association between pleural malignant mesothelioma and chest radiation performed for other malignancies; on the other hand, post-irradiation mesotheliomas of the pericardium have been reported in only a few published cases to date, and no homozygous deletion of 9p21 has been described in such cases. We report the case of a 48-year-old man with a history of Hodgkin's lymphoma and no prior asbestos exposure who developed pericardial malignant epithelioid mesothelioma. We further discuss the cytologic, histologic, immunophenotypic, and fluorescence in situ hybridization findings in this case. To our knowledge, this is the first well-documented case of post-radiation pericardial malignant mesothelioma showing homozygous deletion of 9p21. Homozygous deletion of 9p21, the locus harboring the p16 gene, is present in post-irradiation pericardial malignant mesothelioma. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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8. Propofol Provides Cardiac Protection by Suppressing the Proteasome Degradation of Caveolin-3 in Ischemic/Reperfused Rat Hearts.
- Author
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Afang Zhu, Xin Wei, Yali Zhang, Tao You, Shanglong Yao, Shiying Yuan, Haodong Xu, Faqian Li, and Weike Mao
- Published
- 2017
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9. Transcription Factor 7-like 2 Mediates Canonical Wnt/β-Catenin Signaling and c-Myc Upregulation in Heart Failure.
- Author
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Ning Hou, Bo Ye, Xiang Li, Margulies, Kenneth B., Haodong Xu, Xuejun Wang, and Faqian Li
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- 2016
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10. Two novel Brugada syndrome-associated mutations increase KV4.3 membrane expression and function.
- Author
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TAO YOU, WEIKE MAO, BENZHI CAI, FAQIAN LI, and HAODONG XU
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- 2015
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11. Immunohistochemical detection of mutations in the epidermal growth factor receptor gene in lung adenocarcinomas using mutation-specific antibodies.
- Author
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Yan Xiong, Yun Bai, Leong, Nufatt, Laughlin, Todd S., Rothberg, Paul G., Haodong Xu, Lin Nong, Jing Zhao, Ying Dong, and Ting Li
- Subjects
IMMUNOHISTOCHEMISTRY ,GENETIC mutation ,EPIDERMAL growth factor ,ADENOCARCINOMA ,DUCTAL carcinoma - Abstract
Background: The recent development of antibodies specific for the major hotspot mutations in the epidermal growth factor receptor (EGFR), L858R and E746_A750del, may provide an opportunity to use immunohistochemistry (IHC) as a screening test for EGFR gene mutations. This study was designed to optimize the IHC protocol and the criteria for interpretation of the results using DNA sequencing as the gold-standard. Methods: Tumor sections from fifty lung adenocarcinoma specimens from Chinese patients were immunostained using L858R and E746_A750del-specific antibodies using three different antigen retrieval solutions, and the results were evaluated using three different sets of criteria. The same specimens were used for DNA purification and analysis of EGFR gene mutations. Results: In this study the optimal buffer for antigen retrieval was EDTA (pH 8.0), and the optimal scoring method was to call positive results when there was moderate to strong staining of membrane and/or cytoplasm in >10% of the tumor cells. Using the optimized protocol, L858R-specific IHC showed a sensitivity of 81% and a specificity of 97%, and E746_A750del-specific IHC showed a sensitivity of 59% and a specificity of 100%, both compared with direct DNA analysis. Additionally, the mutant proteins as assessed by IHC showed a more homogeneous than heterogeneous pattern of expression. Conclusions: Our data demonstrate that mutation-specific IHC, using optimized procedures, is a reliable prescreening test for detecting EGFR mutations in lung adenocarcinoma. Virtual Slides: The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/2059012601872392 [ABSTRACT FROM AUTHOR]
- Published
- 2013
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12. Reactive Oxygen Species Suppress Cardiac NaV1.5 Expression through Foxo1.
- Author
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Mao, Weike, Tao You, Bo Ye, Xiang Li, Dong, Henry H., Hill, Joseph A., Faqian Li, and Haodong Xu
- Subjects
REACTIVE oxygen species ,HEART beat ,FORKHEAD transcription factors ,TRANSCRIPTION factors ,HEART cells ,NUCLEOTIDE sequence ,GENE expression - Abstract
Na
V 1.5 is a cardiac voltage-gated Na+ channel αsubunit and is encoded by the SCN5a gene. The activity of this channel determines cardiac depolarization and electrical conduction. Channel defects, including mutations and decrease of channel protein levels, have been linked to the development of cardiac arrhythmias. The molecular mechanisms underlying the regulation of NaV 1.5 expression are largely unknown. Forkhead box O (Foxo) proteins are transcriptional factors that bind the consensus DNA sequences in their target gene promoters and regulate the expression of these genes. Comparative analysis revealed conserved DNA sequences, 5'-CAAAACA-3' (insulin responsive element, IRE), in rat, mouse and human SCN5a promoters with the latter two containing two overlapping Foxo protein binding IREs, 5'-CAAAACAAAACA-3'. This finding led us to hypothesize that Foxo1 regulates NaV 1.5 expression by directly binding the SCN5a promoter and affecting its transcriptional activity. In the present study, we determined whether Foxo1 regulates NaV 1.5 expression at the transcriptional level and also defined the role of Foxo1 in hydrogen peroxide (H2 O2 )-mediated NaV 1.5 suppression in HL-1 cardiomyocytes using chromatin immunoprecipitation (ChIP), constitutively nuclear Foxo1 expression, and RNAi Foxo1 knockdown as well as whole cell voltage-clamp recordings. ChIP with anti-Foxo1 antibody and follow-up semi-quantitative PCR with primers flanking Foxo1 binding sites in the proximal SCN5a promoter region clearly demonstrated enrichment of DNA, confirming Foxo1 recruitment to this consensus sequence. Foxo1 mutant (T24A/S319A-GFP, Foxo1-AA-GFP) was retained in nuclei, leading to a decrease of NaV 1.5 expression and Na+ current, while silencing of Foxo1 expression by RNAi resulted in the augmentation of NaV 1.5 expression. H2 O2 significantly reduced NaV 1.5 expression by promoting Foxo1 nuclear localization and this reduction was prevented by RNAi silencing Foxo1 expression. These studies indicate that Foxo1 negatively regulates NaV 1.5 expression in cardiomyocytes and reactive oxygen species suppress NaV 1.5 expression through Foxo1. [ABSTRACT FROM AUTHOR]- Published
- 2012
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13. Yin Yang 1 Is a Novel Regulator of Pulmonary Fibrosis.
- Author
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Xin Lin, Sime, Patricia J., Haodong Xu, Williams, Marc A., LaRussa, Larry, Georas, Steve N., and Jia Guo
- Published
- 2011
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14. Metastatic Papillary Thyroid Carcinoma and Severe Airflow Obstruction.
- Author
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Manganaris, Christopher, Wittlin, Steven, Haodong Xu, Gurell, Michael, Sime, Patricia, and Kottmann, Robert Matthew
- Subjects
THYROID cancer ,CANCER patients ,COUGH ,DYSPNEA ,PULMONARY manifestations of general diseases ,RESPIRATORY diseases - Abstract
The article discusses the case of a 76-year-old man with known metastatic papillary thyroid carcinoma who presented with progressive cough and dyspnea on exertion over a four-month period. The medical history of the patient is detailed. It offers information on the treatments administered to the patient. The clinical features and pathology of thyroid carcinoma are discussed.
- Published
- 2010
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15. IMP-3 expression in melanocytic lesions.
- Author
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Limin Yu, Haodong Xu, Wasco, Matthew J., Bourne, Patricia A., and Linglei Ma
- Subjects
NEUROENDOCRINE tumors ,MELANOMA ,HYPOGLYCEMIC agents ,GROWTH factors ,GENE expression ,PEPTIDES - Abstract
Background: Insulin-like growth factor-II mRNA-binding protein 3 (IMP-3 ), a member of the insulin-like growth factor mRNA-binding protein family, is expressed in several human malignancies, including melanomas. However, the expression of IMP-3 has not been explored in melanoma in situ, various histologic subtypes of invasive melanomas and atypical Spitz tumors. Methods: IMP-3 immunostain was performed in 157 melanocytic lesions. Results: Nearly all benign (8/8), dysplastic (8/8) and Spitz nevi (8/9) were negative for IMP-3. Focal IMP-3 positivity was observed in 5/12 melanoma in situ and 4/15 superficial melanomas (Breslow depth ≤1 mm). Half (10/20) of deep melanomas (Breslow depth >1 mm) and 25/52 metastatic melanomas demonstrated strong IMP-3 staining. IMP-3 expression differs significantly between non-desmoplastic melanomas (superficial and deep) and benign or dysplastic or Spitz nevi (p = 0.0427, respectively). Four of 23 desmoplastic melanomas expressed IMP-3 , which was significantly different from deep melanomas (p = 0.0109). IMP-3 stained 7 of 10 atypical Spitz tumors. The difference between atypical Spitz tumors and Spitz nevi was statistically significant (p = 0.0256). Conclusion: A malignant circumstance, such as non-desmoplastic melanoma or atypical Spitz tumor, can be inferred when IMP-3 is expressed, suggesting potential diagnostic value of IMP-3 in melanocytic lesions. Yu L, Xu H, Wasco MJ, Bourne PA, Ma L. IMP-3 expression in melanocytic lesions. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
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16. Role of Ca2+/Calmodulin-Stimulated Cyclic Nucleotide Phosphodiesterase 1 in Mediating Cardiomyocyte Hypertrophy.
- Author
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Miller, Clint L., Oikawa,2,5, Masayoshi, Yujun Cai, Wojtovich, Andrew P., Nagel, David J., Xiangbin Xu, Haodong Xu, Florio, Vince, Rybalkin, Sergei D., Beavo, Joseph A., Yiu-Fai Chen, Jian-Dong Li, Blaxall, Burns C., Jun-ichi Abe, and Chen Yan
- Published
- 2009
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17. Reactive Oxygen Species-Induced Activation of p90 Ribosomal S6 Kinase Prolongs Cardiac Repolarization Through Inhibiting Outward K+ Channel Activity.
- Author
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Zhibo Lu, Abe, Jun-ichi, Taunton, Jack, Lu, Yan, Shishido, Tetsuro, McClain, Carolyn, Chen Yan, Sheng Ping Xu, Spangenberg, Thomas M., and Haodong Xu
- Published
- 2008
- Full Text
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18. Utility of anti-L523S antibody in the diagnosis of benign and malignant serous effusions.
- Author
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Hanley, Kristztina Z., Facik, Michael S., Bourne, Patricia A., Qi Yang, Spaulding, Betsy O., Bonfiglio, Thomas A., Haodong, Xu, Hanley, Krisztina Z, Yang, Qi, and Xu, Haodong
- Subjects
CANCER cells ,MESOTHELIOMA ,TUMORS ,IMMUNOGLOBULINS ,CARRIER proteins - Abstract
Background: Immunohistochemistry is helpful in distinguishing metastatic carcinoma from atypical mesothelial cells; however, it is not useful in differentiating atypical mesothelial cells from malignant mesothelial cells. K homolog domain containing protein overexpressed in cancer (KOC), a member of the insulin-like growth factor mRNA-binding protein (IMP) family, also known as L523S and IMP3, is expressed during embryogenesis and in various malignancies. Using a mouse monoclonal antibody (L523S) against KOC, KOC expression was investigated in malignant tumors and reactive mesothelial cells in serous effusions.Methods: Seventy-six cases with paraffin-embedded pleural, pericardial, and peritoneal serous effusion cell blocks including 60 malignant serous effusions (11 malignant pleural mesotheliomas and 49 metastatic carcinomas) and benign pleural effusions (14 cases with reactive mesothelial cells and 2 cases with atypical cells with uncertain significance) were selected for immunohistochemical analysis with L523S, calretinin, and CK5/6.Results: Immunohistochemical studies showed that positive staining for KOC of variable degrees of intensity was observed in 47 of 60 cases in malignant serous effusions including 10 of 11 mesotheliomas and 36 of 49 metastatic carcinomas. The associated reactive mesothelial cells were negative for KOC but positive for calretinin and CK5/6. All 11 malignant mesotheliomas exhibited positivity for calretinin, and 9 of 11 cases had CK5/6 staining. In addition, 16 cases that were originally diagnosed either as pleural effusions with reactive mesothelial cells (14) or atypical cells with uncertain significance (2) were also tested for KOC expression. Interestingly, 3 of 16 cases exhibited various degrees of positivity for KOC, 2 of which were diagnosed as lung adenocarcinoma with a recurrence after tumor resection and 1 as malignant pleural mesothelioma.Conclusions: Anti-L523S antibody is a useful marker for the detection of malignant cells in serous effusions and it can have significant utility in differentiating reactive mesothelial cells from malignant mesothelioma and metastatic carcinoma in combination with calretinin and CK5/6 staining. [ABSTRACT FROM AUTHOR]- Published
- 2008
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- View/download PDF
19. Solitary Fibrous Tumor of the Pancreas: A Case Report.
- Author
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Miyamoto, Hiroshi, Molena, Daniela A., Schoeniger, Luke O., and Haodong Xu
- Subjects
MEDICAL research ,TUMORS ,ENDOCRINE glands ,ABDOMINAL pain ,MAGNETIC resonance imaging ,LAPAROSCOPIC surgery ,DISEASES in women - Abstract
Solitary fibrous tumor (SFT) is an unusual meserichymal neoplasm that most often arises in the pleura; however, it has recently been described in a number of extrapleural sites. This report describes an extremely rare case of a benign SET arising in the pancreas. A 41- year-old woman presented in the clinic with right upper abdominal pain. Subsequent ultrasonographic studies revealed a 1.5 x 1.5 x 1.4 cm hypoechoic mass within the pancreatic body, which was later confirmed on both helical computerized tomography and magnetic resonance imaging studies. An endocrine tumor was clinically suspected. Laparoscopic enucleation of the mass was performed. Microscopically, the tumor was composed of bland uniform spindle cells arranged between collagen bundles. On immutiohistochemical studies, these spindle cells were positive for CD34 and bcl-2 but negative for cytokeratin (AE1+AE3 and Cam5.2), smooth muscle actin, desmin, S-100, and c-kit. Based on the light microscopic morphology and immunohistochemical staining profile, the diagnosis of SFT was rendered. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
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20. TGF-β induces p65 acetylation to enhance bacteria-induced NF-κB activation.
- Author
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Hajime Ishinaga, Hirofumi Jono, Jae Hyang Lim, Soo-Mi Kweon, Haodong Xu, Un-Hwan Ha, Haidong Xu, Tomoaki Koga, Chen Yan, Feng, Xin-Hua, Lin-Feng Chen, and Jian-Dong Li
- Subjects
ACETYLATION ,BACTERIA ,TRANSFORMING growth factors ,CELL proliferation ,HAEMOPHILUS influenzae - Abstract
Transforming growth factor-β (TGF-β) family members are multifunctional growth factors involved in regulating diverse biological processes. Despite the critical role for TGF-β in regulating cell proliferation, differentiation, migration and development, its role in regulating NF-κB-dependent inflammatory response still remains unclear. Here, we show that TGF-β1 induces acetylation of NF-κB p65 subunit to synergistically enhance bacterium nontypeable Haemophilus influenzae-induced NF-κB activation and inflammatory response in vitro and in vivo. The TGF-β1-induced acetylation of p65 is mediated via a Smad3/4-PKA-p300-dependent signaling pathway. Acetylation of p65 at lysine 221 by TGF-β1 is critical for synergistic enhancement of bacteria-induced DNA-binding activity, NF-κB activation, NF-κB-dependent transcription of TNF-α and IL-1β and interstitial polymorphonuclear neutrophil infiltration in vitro and in vivo. These studies provide new insights into the novel regulation of NF-κB by TGF-β signaling. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
- View/download PDF
21. Malakoplakia of the Prostate on Needle Core Biopsy: A Case Report and Review of the Literature.
- Author
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Wagner, David, Joseph, Jean, Jiaoti Huang, and Haodong Xu
- Subjects
IMMUNOSUPPRESSION ,GENITOURINARY organs ,BLADDER ,LIVER ,ESCHERICHIA coli ,CANCER - Abstract
Malakoplakia is a rare inflammatory disorder that results from an infectious process and that may be associated with immunosuppression. It most often occurs in the genitourinary tract; however, isolated cases have been reported in many other organs, including colon, stomach, lung, liver, bone, uterus, and skin. In the bladder, which is the most common site of involvement, it may be mistaken for malignancy on cystoscopic examination or computerized topography scan. Gram-negative bacteria such as Escherichia coli and Kiebsiella pneumonia are often isolated from malakoplakia lesions, although other less common bacteria such as Rhodococcus equi may also be found. This is a case report of prostatic malakoplakia diagnosed on needle core biopsy from a patient suspected to harbor a malignancy. [ABSTRACT FROM AUTHOR]
- Published
- 2007
- Full Text
- View/download PDF
22. Contribution of T-cell subsets to the pathophysiology of Pneumocystis-related immunorestitution disease.
- Author
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Bhagwat, Samir P., Gigliotti, Francis, Haodong Xu, and Wright, Terry W.
- Subjects
LUNG diseases ,PNEUMOCYSTIS pneumonia ,IMMUNE response ,LYMPHOCYTES ,CELLS ,PATHOLOGICAL physiology - Abstract
lmmune-mediated lung injury is an important component of Pneumocystis pneumonia (PcP)-related immunorestitution disease (IRD). However, the individual contribution of CD4
+ and CD8+ T cells to the pathophysiology of IRD remains undetermined. Therefore, IRD was modeled in severe combined immunodeficient mice, and specific T cell depletion was used to determine how T cell subsets interact to affect the nature and severity of disease. CD4+ cells were more abundant than CD8+ cells during the acute stage of IRD that coincided with impaired pulmonary physiology and organism clearance. Conversely, CD8+ cells were more abundant during the resolution phase following P. carinii clearance. Depletion of CD4+ T cells protected mice from the acute pathophysiology of IRD. However, these mice could not clear the infection and developed severe PcP at later time points when a pathological CD8+ T cell response was observed. In contrast, mice depleted of CD8+ T cells efficiently cleared the infection but developed more severe disease, an increased frequency of IFN-γ-producing CD4+ cells, and a prolonged CD4+ T cell response than mice with both CD4+ and CD8+ cells. These data suggest that CD4+ T cells mediate the acute respiratory disease associated with IRD. In contrast, CD8+ T cells contributed to neither lung injury nor organism clearance when CD4+ cells were present, but instead served to modulate CD4 function. In the absence of CD4+ cells, CD8+ T cells produced a nonprotective, pathological immune response. These data suggest that the interplay of CD4+ and CD8+ T cells affects the ultimate outcome of PeP-related IRD. [ABSTRACT FROM AUTHOR]- Published
- 2006
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23. Functional expression of a GFP-tagged Kv1.5 alpha-subunit in mouse ventricle.
- Author
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Huilin Li, Weinong Guo, Haodong Xu, Hood, Rebecca, Benedict, Andrew T., and Nerbonne, Jeanne M.
- Subjects
ION channels ,CELL membranes ,HEART cells ,POTASSIUM channels - Abstract
Explores the feasibility of increasing the cell surface expression of voltage-gated ion channels in cardiac cells in vivo and the functional consequences of ectopic channel expression. Expression of voltage-gated potassium ion (Kv) 1.5-green fluorescent protein (GFP) in transgenic mice; Heterogeneous expression of Kv1.5-GFP; Selective increase in a novel 4-aminopyridine-sensitive potassium ion current in Kv1.5-GFP-expressing cells.
- Published
- 2001
- Full Text
- View/download PDF
24. Exogenous Lipoid Pneumonia: An Unexpected Complication of Substance Abuse.
- Author
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Gurell, Michael N., Kottmann, R. Matthew, Haodong Xu, and Sime, Patricia J.
- Subjects
LETTERS to the editor ,PNEUMONIA - Abstract
A letter to the editor about a research concerning a patient with exogenous lipoid pneumonia caused by inhalation of crack cocaine mixed with petroleum jelly is presented.
- Published
- 2008
- Full Text
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25. IMP3: a diagnostic and prognostic biomarker in malignant melanoma.
- Author
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Haodong Xu
- Subjects
CELL proliferation ,MELANOMA ,CANCER treatment ,THERAPEUTICS - Abstract
The author reflects on the importance of identifying molecules that have prognostic and diagnostic values in melanoma in order to develop effective therapeutic agents to cure it. He relates that a device called IMP3, is a valuable tool for the problem as it promote tumor cell proliferation as well as having a significant value in urinary bladder carcinoma. He also asserts that further studies are needed to prove its role in the treatment of melanoma.
- Published
- 2008
- Full Text
- View/download PDF
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