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Hlavay BA, Zhuo R, Ogando N, Charlton C, Stapleton JT, Klein MB, Power C. Human pegivirus viremia in HCV/HIV co-infected patients: Direct acting antivirals exert anti-pegivirus effects. J Clin Virol 2023; 162:105445. [PMID: 37043902 DOI: 10.1016/j.jcv.2023.105445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/16/2023] [Accepted: 03/31/2023] [Indexed: 04/14/2023]
Abstract
BACKGROUND Human pegivirus (HPgV) is a single-stranded RNA virus that is closely related to hepatitis C virus (HCV). HPgV has also been shown to infect patients with human immunodeficiency virus (HIV). The mechanisms and disease outcomes of HPgV infections are largely unknown, although it has been implicated in both cancer and neurological diseases. There are no established therapies for HPgV. OBJECTIVES To estimate the prevalence of HPgV in a cohort of HCV/HIV co-infected patients undergoing treatment for HCV with direct acting antivirals (DAA) and investigate the effect of DAA therapy on HPgV infection. STUDY DESIGN RNA was extracted from plasma samples collected at time points before, during, and after DAA. HPgV RNA abundance was quantified by droplet digital PCR assays targeting the NS5A and 5'UTR domains and confirmed by RT-qPCR. Clinical, demographic and treatment data were analysed. RESULTS HPgV RNA was detected and quantified in 26 of 100 patients' plasma (26%) before starting DAA. Patients with detectable HPgV were more likely to be male, had higher peak HIV plasma levels, and a history of injection drug use. Patients receiving sofosbuvir/ledipasvir (n = 9) displayed significantly lower HPgV levels at time of DAA completion and had lower post-DAA HPgV rebound levels compared to patients receiving sofosbuvir/velpatasvir (n = 11) although both regimens significantly reduced viremia directly following DAA completion. Sustained suppression of HPgV was also observed among patients (n = 2) receiving pegylated-interferon. CONCLUSIONS HPgV RNA was frequently detected in HCV/HIV co-infected patients and was supressed by DAA and pegylated interferon therapies with sofosbuvir-ledipasvir showing greatest antiviral activity. These findings suggest potential treatment strategies for HPgV infections.
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Affiliation(s)
- B A Hlavay
- Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - R Zhuo
- Public Health Laboratory, Alberta Precision Laboratories, Edmonton, AB, Canada
| | - N Ogando
- Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | - C Charlton
- Laboratory Medicine & Pathology, University of Alberta, Edmonton, AB, Canada; Li Ka Shing Institute of Virology, University of Alberta, Edmonton, AB, Canada; Public Health Laboratory, Alberta Precision Laboratories, Edmonton, AB, Canada
| | - J T Stapleton
- Departments of Internal Medicine and Microbiology, University of Iowa, Iowa City, Iowa, USA
| | - M B Klein
- Department of Medicine, McGill University Health Centre, Montreal, QC, Canada
| | - C Power
- Department of Medicine, University of Alberta, Edmonton, AB, Canada.
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Chong K, Almsherqi ZA, Zhuo R, Deng Y. Plasmalogen-rich foods promote the formation of cubic membranes in amoeba Chaos under stress conditions. FEBS Open Bio 2021. [PMID: 34184425 PMCID: PMC8329783 DOI: 10.1002/2211-5463.13241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 06/11/2021] [Accepted: 06/28/2021] [Indexed: 11/11/2022] Open
Abstract
Previous studies have indicated that the ability to form cubic membrane (CM), a three-dimensional periodic structure with cubic symmetry, in amoeba (Chaos carolinense) under stress conditions depends on the type of food organism supplied before cell starvation. The significant increase in docosapentaenoic acid (DPA; C22:5n-6) during the starvation period has been reported to induce CM formation and support Chaos cell survival. In this article, we further investigated the lipid profiles of food organisms of the Chaos cells to reveal the key lipid components that might promote CM formation. Our results show that the lipids extracted from cells of the native food organism Paramecium multimicronucleatum are enriched in plasmalogens. More specifically, plasmalogen phosphatidylcholine and plasmalogen phosphatidylethanolamine might be the key lipids that trigger CM formation in Chaos cells under starvation stress conditions. Unexpectedly, CM formation in these cells is not supported when the native food organism was replaced with plasmalogen-deficit Tetrahymena pyriformis cells. Based on a previous lipidomics study on amoeba Chaos and this study on the lipid composition of its food organisms, three key lipids (plasmalogen phosphatidylcholine, plasmalogen phosphatidylethanolamine and diacyl-phosphatidylinositol) were identified and used for liposomal construction. Our in vitro study revealed the potential role of these lipids in a nonlamellar phase transition. The negative staining transmission electron microscopy data of our liposomal constructs support the notion that plasmalogens may curve the membrane, which, in turn, may facilitate membrane fusion and vesicular formation, which is crucial for membrane dynamics and trafficking.
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Affiliation(s)
- Ketpin Chong
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Zakaria A Almsherqi
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Ruijiang Zhuo
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, China
| | - Yuru Deng
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering, Wenzhou Medical University, China.,Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
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Zhuo R, Rong P, Wang J, Parvin R, Deng Y. The Potential Role of Bioactive Plasmalogens in Lung Surfactant. Front Cell Dev Biol 2021; 9:618102. [PMID: 33681198 PMCID: PMC7928286 DOI: 10.3389/fcell.2021.618102] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 01/08/2021] [Indexed: 01/24/2023] Open
Abstract
Neonatal respiratory distress syndrome (NRDS) is a type of newborn disorder caused by the deficiency or late appearance of lung surfactant, a mixture of lipids and proteins. Studies have shown that lung surfactant replacement therapy could effectively reduce the morbidity and mortality of NRDS, and the therapeutic effect of animal-derived surfactant preparation, although with its limitations, performs much better than that of protein-free synthetic ones. Plasmalogens are a type of ether phospholipids present in multiple human tissues, including lung and lung surfactant. Plasmalogens are known to promote and stabilize non-lamellar hexagonal phase structure in addition to their significant antioxidant property. Nevertheless, they are nearly ignored and underappreciated in the lung surfactant-related research. This report will focus on plasmalogens, a minor yet potentially vital component of lung surfactant, and also discuss their biophysical properties and functions as anti-oxidation, structural modification, and surface tension reduction at the alveolar surface. At the end, we boldly propose a novel synthetic protein-free lung surfactant preparation with plasmalogen modification as an alternative strategy for surfactant replacement therapy.
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Affiliation(s)
- Ruijiang Zhuo
- Eye Hospital, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, China
| | - Pu Rong
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
| | - Jieli Wang
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
| | - Rokshana Parvin
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
| | - Yuru Deng
- Eye Hospital, School of Ophthalmology and Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, China
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China
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Le A, Yang L, Wang Z, Dai XY, Xiao TH, Zhuo R, Yuan R, Tulandi T. Two cases of uterine and vaginal malformations. CLIN EXP OBSTET GYN 2019. [DOI: 10.12891/ceog4845.2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Xie J, Nettel-Aguirre A, Lee BE, Chui L, Pang XL, Zhuo R, Parsons B, Vanderkooi OG, Tarr PI, Ali S, Dickinson JA, Hagen E, Svenson LW, MacDonald SE, Drews SJ, Tellier R, Graham T, Lavoie M, MacDonald J, Freedman SB. Relationship between enteric pathogens and acute gastroenteritis disease severity: a prospective cohort study. Clin Microbiol Infect 2018; 25:454-461. [PMID: 29964235 DOI: 10.1016/j.cmi.2018.06.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 05/28/2018] [Accepted: 06/09/2018] [Indexed: 12/18/2022]
Abstract
OBJECTIVES To evaluate the relationship between individual bacterial and viral pathogens and disease severity. METHODS Children <18 years with three or more episodes of vomiting and/or diarrhoea were enrolled in two Canadian paediatric emergency departments between December 2014 and August 2016. Specimens were analysed employing molecular panels, and outcome data were collected 14 days after enrolment. The primary outcome was severe disease over the entire illness (symptom onset until 14-day follow-up), quantified employing the Modified Vesikari Scale (MVS) score. The score was additionally analysed in two other time periods: index (symptom onset until enrolment) and follow-up (enrolment until 14-day follow-up). RESULTS Median participant age was 20.7 (IQR: 11.3, 44.2) months; 47.4% (518/1093) and 73.4% (802/1093) of participants had index and total MVS scores ≥11, respectively. The most commonly identified pathogens were rotavirus (289/1093; 26.4%) and norovirus (258/1093; 23.6%). In multivariable analysis, severe disease over the entire illness was associated with rotavirus (OR = 9.60; 95%CI: 5.69, 16.19), Salmonella (OR = 6.61; 95%CI: 1.50, 29.17), adenovirus (OR = 2.53; 95%CI: 1.62, 3.97), and norovirus (OR = 1.43; 95%CI: 1.01, 2.01). Pathogens associated with severe disease at the index visit were: rotavirus only (OR = 6.13; 95%CI: 4.29, 8.75), Salmonella (OR = 4.59; 95%CI: 1.71, 12.29), adenovirus only (OR = 2.06; 95%CI: 1.41, 3.00), rotavirus plus adenovirus (OR = 3.15; 95%CI: 1.35, 7.37), and norovirus (OR = 0.68; 95%CI: 0.49, 0.94). During the follow-up period, rotavirus (OR = 2.21; 95%CI: 1.50, 3.25) and adenovirus (OR = 2.10; 95%CI: 1.39, 3.18) were associated with severe disease. CONCLUSIONS In children presenting for emergency department care with acute gastroenteritis, pathogens identified were predominantly viruses, and several of which were associated with severe disease. Salmonella was the sole bacterium independently associated with severe disease.
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Affiliation(s)
- J Xie
- Section of Pediatric Emergency Medicine, Alberta Children's Hospital, University of Calgary, Calgary, Alberta, Canada
| | - A Nettel-Aguirre
- Departments of Pediatrics and of Community Health Sciences, Cumming School of Medicine, Faculty of Kinesiology, Alberta Children's Hospital Research Institute, O'Brien Population Health Institute, University of Calgary, Calgary, Alberta, Canada
| | - B E Lee
- Department of Pediatrics, Faculty of Medicine and Dentistry, Women and Children's Health Research Institute, University of Alberta, Edmonton, Alberta, Canada
| | - L Chui
- Provincial Laboratory for Public Health, Alberta, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - X L Pang
- Provincial Laboratory for Public Health, Alberta, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - R Zhuo
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - B Parsons
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - O G Vanderkooi
- Departments of Pediatrics, Microbiology, Immunology and Infectious Diseases, Pathology and Laboratory Medicine and Community Health Sciences and the Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - P I Tarr
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, Washington University School of Medicine, St Louis, MO, USA
| | - S Ali
- Department of Pediatrics, Faculty of Medicine and Dentistry, Women and Children's Health Research Institute, University of Alberta, Edmonton, Alberta, Canada
| | - J A Dickinson
- Department of Family Medicine, University of Calgary, Calgary, Alberta, Canada; Department of Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - E Hagen
- Section of Pediatric Emergency Medicine, Alberta Children's Hospital, University of Calgary, Calgary, Alberta, Canada
| | - L W Svenson
- Analytics and Performance Reporting, Alberta Health Division of Preventive Medicine, School of Public Health, University of Alberta, Edmonton, Alberta, Canada
| | - S E MacDonald
- Faculty of Nursing, University of Alberta, Edmonton, Canada; School of Public Health, University of Alberta, Edmonton, Canada; Department of Pediatrics, University of Calgary, Calgary, Alberta, Canada
| | - S J Drews
- Provincial Laboratory for Public Health, Alberta, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - R Tellier
- Provincial Laboratory for Public Health, Alberta, Canada; Departments of Pathology and Laboratory Medicine and Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
| | - T Graham
- Alberta Health Services, Edmonton Zone, Alberta, Canada; Department of Emergency Medicine, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - M Lavoie
- Population and Public Health, Fraser Health, Surrey, British Columbia, Canada
| | - J MacDonald
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - S B Freedman
- Sections of Pediatric Emergency Medicine and Gastroenterology, Alberta Children's Hospital, Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
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Le A, Wang Z, Dai X, Xiao T, Zhuo R, Zhang B, Xiao Z, Fang X. An experimental study on the use of icariin for improving thickness of thin endometrium. Genet Mol Res 2017; 16. [DOI: 10.4238/gmr16019126] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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Ng J, Khani J, Zhuo R, Trichter S, Nowak E, Smith M, Hayes M, Swistel A. Safety, Feasibility, and Short-Term Clinical Outcomes for Locally Recurrent Breast Cancer Patients Treated With a Second Breast-Conserving Treatment including Intraoperative Radiation Therapy. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hou LJ, Wu XM, Zhuo R, Zhang F, Lyu F. [The application of anterior segment optical coherence tomography in residual strabismus surgery]. Zhonghua Yan Ke Za Zhi 2016; 52:568-73. [PMID: 27562276 DOI: 10.3760/cma.j.issn.0412-4081.2016.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To evaluate the application of anterior segment optical coherence tomography (ASOCT) in surgical design for residual horizontal strabismus patients. METHODS This article was a retrospective case series analysis. Total 20 residual strabismus patients (13 with residual exotropia and 7 with residual esotropia) in Eye Hospital of Wenzhou Medical University from Jan 2009 to Jan 2011 were studied. Routine strabismus examinations were completed preoperatively. The distance between insertion of horizontal rectus muscles and corneal limbus were measured with ASOCT preoperatively and calipers intraoperatively. Reoperational amount and method for residual strabismus patients were designed according to the limbus-insertion distance. The paired t test was used to compare the agreement between two methods of measurement of limbus-insertion distance. The cure rates of reoperation were analyzed. RESULTS No statistical significance was observed between the measurements with ASOCT (7.7±1.7) mm and calipers (7.8±1.1)mm (t=-1.37, P=0.19). According to ASOCT image, the second surgical method was re-recession muscle for 4 patients; re-recession of original performed muscle combined with antagonist muscle resection for 10 patients and antagonist muscle resection combined with horizontal rectus muscle recession in fellow eye for 6 patients. All the surgical processes went on successfully, no severe intraoperative and postopereative complications were noted. Sixteen cases were cured (80%) . CONCLUSIONS Horizontal rectus muscle evaluation with ASOCT preoperatively may benefit the choice of performed muscle, calculation of surgical amount, reduction of unnecessary surgical procedure and optimization second surgical design for residual strabismus patients. (Chin J Ophthalmol, 2016, 52: 568-573).
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Affiliation(s)
- L J Hou
- Department of Pediatric Ophthalmology, Eye Hospital of Wenzhou Medical University at Hangzhou, Hangzhou 310020, China
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Sankar S, Bell R, Stephens B, Zhuo R, Sharma S, Bearss DJ, Lessnick SL. Erratum: Mechanism and relevance of EWS/FLI-mediated transcriptional repression in Ewing sarcoma. Oncogene 2016; 35:6155-6156. [DOI: 10.1038/onc.2016.142] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Le A, Shan L, Xiao T, Zhuo R, Wang Z. Removal of an incarcerated intrauterine device in the sigmoid colon under the assistance of hysteroscope and laparoscope: a case report. CLIN EXP OBSTET GYN 2015. [DOI: 10.12891/ceog1887.2015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Le A, Shan L, Xiao T, Zhuo R, Wang Z. Removal of an incarcerated intrauterine device in the sigmoid colon under the assistance of hysteroscope and laparoscope: a case report. CLIN EXP OBSTET GYN 2015; 42:531-534. [PMID: 26411227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND/AIMS To explore the value of hysteroscope and laparoscope in removing an incarcerated or ectopic intrauterine device (IUD). MATERIALS AND METHODS A 33-year-old woman was admitted to the present hospital on May 22nd, 2013. An incarcerated IUD was proven by ultrasonography. An IUD had been implanted in October 2011. Clinical case report of an incarcerated IUD in the sigmoid colon. RESULTS An IUD was successfully removed with the assistance of hysteroscope and laparoscope. CONCLUSION Ultrasonography should be performed in the follow-up of the patients after IUD implantation. Ectopic or incarcerated IUD can be successfully removed with the assistance of hysteroscope and laparoscope with minimal trauma.
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Le AW, Wang ZH, Yuan R, Shan LL, Xiao TH, Zhuo R, Shen Y. Association of the estrogen receptor-β gene RsaI and AluI polymorphisms with human idiopathic thin endometrium. Genet Mol Res 2013; 12:5978-85. [PMID: 24338391 DOI: 10.4238/2013.november.26.7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of this study was to investigate the potential correlation between polymorphisms of the estrogen receptor (ER)-β gene (RsaI and AluI) and ethnic Han Chinese human idiopathic thin endometrium. A total of 120 patients with idiopathic thin endometrium and 120 sterility patients with normal endometrium thickness (controls) were included in the study. RsaI and AluI polymorphisms of the ER-β gene were analyzed with polymerase chain reaction-restriction fragment length polymorphism. The distribution of polymorphisms, genotype, allele, and haplotype was compared between the 2 groups. A significant difference in the RsaI genotype was observed between idiopathic thin endometrium patients and controls. The distribution of the R allele of the RsaI polymorphism in idiopathic thin endometrium patients was 37.1% compared with 48.3% in controls. The odds ratio was 0.630 (95% confidence interval = 0.438 to 0.907, P = 0.013). No significant difference in the genotype of the AluI polymorphism was found between the two groups. The linkage disequilibrium between RsaI and AluI haploids was not significant in either group, with D' values of 0.2036 and 0.0685 in the idiopathic thin endometrium patients and controls, respectively. The results of this study suggest a potential role of the ER-β gene polymorphisms in the etiology of idiopathic atrophic endometrium and the R allele as a potential protective factor in ethnic Han Chinese.
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Affiliation(s)
- A W Le
- Department of Obstetrics and Gynecology, Nanshan Affiliated Hospital of Guangdong Medical College, Shenzhen, China
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Ren S, Jiang X, Li Z, Wen Y, Chen D, Li X, Zhang X, Zhuo R, Chu H. Physical properties of poly(N-isopropylacrylamide) hydrogel promote its effects on cardiac protection after myocardial infarction. J Int Med Res 2013; 40:2167-82. [PMID: 23321174 DOI: 10.1177/030006051204000615] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE Studies have demonstrated the protective effects of biomaterials against myocardial infarction (MI), but the relationship between their physical characteristics and their function is incompletely understood. This study investigated such relationships for a hydrogel preparation. METHODS Two types of poly(N-isopropylacrylamide) (PNIPAAm) hydrogel with different degradation times (Gel A and Gel B) were synthesized. In vivo hydrogel formation and maintenance were observed and confirmed in mice. The solutions were also injected into the infarct area immediately after MI induction in rats. RESULTS PNIPAAm hydrogel exhibited a three-dimensional structure resembling native extracellular matrix (ECM). Compared with phosphate-buffered saline, Gel A and Gel B increased contractility of isolated infarcted myocardium, reduced collagen deposition, increased neovascularization, inhibited left ventricle expansion and improved cardiac function. Myocardial contractility was greater with Gel B than with Gel A. CONCLUSIONS Intramyocardial injection of PNIPAAm hydrogel provides structural support and some functional repair of damaged ECM, suggesting that it might be useful for cardiac tissue engineering.
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Affiliation(s)
- S Ren
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
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Abstract
Ewing sarcoma provides an important model for transcription-factor mediated oncogenic transformation because of its reliance on the ETS-type fusion oncoprotein EWS/FLI. EWS/FLI functions as a transcriptional activator and transcriptional activation is required for its oncogenic activity. Here we demonstrate that a previously less-well characterized transcriptional repressive function of the EWS/FLI fusion is also required for the transformed phenotype of Ewing sarcoma. Through comparison of EWS/FLI transcriptional profiling and genome-wide localization data, we define the complement of EWS/FLI direct downregulated target genes. We demonstrate that LOX is a previously undescribed EWS/FLI-repressed target that inhibits the transformed phenotype of Ewing sarcoma cells. Mechanistic studies demonstrate that the NuRD co-repressor complex interacts with EWS/FLI, and that its associated histone deacetylase and LSD1 activities contribute to the repressive function. Taken together, these data reveal a previously unknown molecular function for EWS/FLI, demonstrate a more highly coordinated oncogenic transcriptional hierarchy mediated by EWS/FLI than previously suspected, and implicate a new paradigm for therapeutic intervention aimed at controlling NuRD activity in Ewing sarcoma tumors.
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Affiliation(s)
- S Sankar
- Department of Oncological Sciences, Huntsman Cancer Institute, School of Medicine, Salt Lake City, UT, USA
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Le A, Shang L, Xiao T, Zhuo R, Wang Z. Pheochromocytoma in ectopic pregnancy: a case report. CLIN EXP OBSTET GYN 2012; 39:553-555. [PMID: 23444769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To study pregnancy characteristics in women with pheochromocytoma and to improve awareness of this comorbidity among obstetricians and gynecologists. METHODS The diagnosis and treatment of a case of ectopic pregnancy with pheochromocytoma is described. RESULTS The patient was diagnosed with a ruptured left Fallopian tube isthmus due to pregnancy, with comorbid left adrenal pheochromocytoma. CONCLUSION Ectopic pregnancy with heavy bleeding and elevated blood pressure is indicative of pheochromocytoma. Measurement of the levels of urinary vanillylmandelic acid and urinary and serum catecholamines, as well as ultrasonography, can help diagnose this comorbidity.
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Affiliation(s)
- A Le
- Department of the Gynaecology, The affiliated Shenzhen Nanshan People's Hospital, Guangdong Medical College, Shenzhen, China.
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Le A, Wang Z, Yuan R, Xiao T, Zhuo R. Ultrasound urodynamic study of urinary tract dysfunction after radical hysterectomy and pelvic lymphadenectomy in women with cervical carcinoma. EUR J GYNAECOL ONCOL 2010; 31:418-424. [PMID: 20882885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
PURPOSE To investigate the functional changes of the lower urinary tract after radical hysterectomy and pelvic lymphadenectomy node dissection using ultrasound urodynamics. METHODS Fifty-one women with cervical carcinoma underwent pre- and postoperative B-mode ultrasound imaging urodynamics. RESULTS Twenty-six women needed abdominal straining to void after radical surgery, and the urinary stream was intermittent. The maximum flow rate, average flow rate, and voiding volume significantly decreased, but the post-void residual volume significantly increased. Bladder sensory function deteriorated and maximum detrusor pressure decreased. The functional length decreased, but the maximum urethral pressure and urethral closure pressure did not change. Ultrasound measurement showed no significant changes regarding the depth of the bladder wall or the position of the bladder neck. CONCLUSIONS Lower urinary tract dysfunction after radical hysterectomy is characteristic. Measurement of ultrasound urodynamics may be used as a preliminary screening method to detect voiding dysfunction following surgery.
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Affiliation(s)
- A Le
- Affiliated Nanshan Hospital, Guangdong Medical College, Shenzhen, China
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Zhang L, Hu C, Ye W, Zhu D, Yu Z, Zhuo R, Sun M. The copper-resistant bacterium ACU isolated from the rhizosphere ofEichhornia crassipes(Mart.) increased the endurance ofPotamogeton crispusL. to copper toxicity. J Appl Microbiol 2008; 105:1034-43. [DOI: 10.1111/j.1365-2672.2008.03835.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
Cyclic core dendritic polymer is a new type of synthetic polymers. The ability of generation 4 of the dendrimer with a core of 1,4,7,10-tetraazacyclododecane to function as an effective gene delivery vector was investigated. Results from fluorescence in situ hybridization (FISH) show that the pCH 110 plasmid DNA was transferred into human small intestine cancer metastatic ascites (HICMA) cells induced by this kind of dendrimer as a vector. The transferred LacZ, GFP and luciferase genes were highly expressed in the transfected HICMA, COS-7 and 293 cells. These studies demonstrate that the dendrimer can transfect mammalian cells in vitro which offers an alternatively efficient method for mammalian gene transfer.
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Affiliation(s)
- H Cheng
- Center for Developmental biology, College of Life Sciences, Wuhan University, PR China
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Abstract
A new PNIPA hydrogel was synthesized by carrying out the polymerization in the gelated corn starch aqueous solution. This PNIPA hydrogel has an improved surface property and does not form the disadvantageous bubbles during the shrinking process. This change is due to the hydrogen bonds between the corn starch and the hydrophilic side groups of the PNIPA chains, which let the starch act as the long graft-like chains of the PNIPA hydrogel. During the reswelling process, this PNIPA hydrogel exhibits a sigmoidal swelling pattern. This hydrogel with improved surface property may be very useful for the potential applications of the temperature-sensitive hydrogel. Copyright 2000 Academic Press.
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Affiliation(s)
- X Zhang
- Laboratory of Biomedical Polymer Materials of the Ministry of Education Department of Chemistry, Wuhan University, Wuhan, 430072, People's Republic of China
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20
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Abstract
The aneuploidy-inducing activity of a Chinese medicinal herb, Tripterygium hypoglaucum (level) Hutch (THH), was investigated by means of three cytogenetic end-points, i.e. C-mitotic (CM) effects, micronuclei (MN) and parallel chromosome structural aberration (CA) analyses in vivo. The CA analysis was expected to reflect the origins of MN induced by clastogens or aneugens. The experiments were performed on mouse bone marrow cells. The animals were treated with the crude water extracts of THH (single i.p. injection) in the dose range 120-686 mg/kg. Colchicine (COL) was taken as a positive control for its known aneuploidy-inducing effects. THH showed similar genotoxic effects to COL in CM, MN and CA analyses: positive CM effects were observed accompanied with increases of mitotic index and frequencies of CM cells as well as decreased frequencies of anaphase in all of the THH-treated groups. The compound showed a positive MN response in bone marrow polychromatic erythrocytes but was negative in CA analyses. No sex differences were found in any treated group. The preliminary results suggested that THH is an aneuploidy inducer in mouse bone marrow cells under the present experimental conditions.
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Affiliation(s)
- X Wang
- Department of Biology, Yunnan Normal University, Kunming, People's Republic of China
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