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Wang YB, Chen EQ, Cui YL, Zeng L, Wang YJ, Tang H. Seroprevalence of hepatitis B virus markers in individuals for physical examination in West China Hospital, China. Eur Rev Med Pharmacol Sci 2011; 15:592-596. [PMID: 21796864] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Hepatitis B virus (HBV) is the major cause of chronic hepatitis,cirrhosis, and hepatocellular carcinoma. The global epidemiological scenario of HBV infection has been changing rapidly over the last two decades due to an effective immunization programme initiated by the World Health Organization. The objective of this study is to estimate the prevalence of HBV in apparently adult people who were taken health examination in our Hospital. METHODS A cross-sectional seroprevalence analysis of hepatitis B virus infection was performed in 12037 adult residents (aged > or =18 years) in Chengdu, who visited Health Examination Center of West China Hospital of Sichuan University for routine medical check-up during the period from March to December 2008. A structured medical form was used to collect data on demographic characteristics and risk factors. ELISA was used to test sera for HBV markers. Descriptive and logistic regression models were used for analysis. RESULTS A total of 12,037 urban residents were involved. Prevalence of positive HBsAg was 6.1%, lower than the level of national seroepidemiological survey in (7.18%). Among HBsAg negative people, anti-HBs and anti-HBc was 60.2% and 13.6% respectively. There was a maximum between 18 to 29 years of age (61.8%) in anti-HBs positive people. Multivariate conditional logistic regressive analysis showed that, except for blood and vertical transmission, factors of male gender (OR, 1.876; 95% CI, 1.519-2.316; P < 0.001) and alcohol intake (OR, 0.689; 95% CI, 0.571-0.832; P < 0.001) were associated with a higher risk of positive HBsAg. CONCLUSIONS Among the medical examination people in Chengdu, HBsAg positive rate was lower than the national general population, the epidemiological characteristics of hepatitis B has been changed, because of vacination policies to the newborn; therefore, the necessity to continue to carry on the vaccination program.
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Affiliation(s)
- Y B Wang
- Center of Infectious Diseases, West China Hospital of Sichuan University, Chengdu, People's Republic of China
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Wan R, Ying W, Zeng L, Deng X, Chen H, Gao L. Antibody-Mediated Response in Rat Liver Chronic Rejection. Transplant Proc 2011; 43:1976-9. [DOI: 10.1016/j.transproceed.2011.03.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 02/23/2011] [Accepted: 03/01/2011] [Indexed: 12/29/2022]
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Chen KH, Zeng L, Gu W, Zhou J, Du DY, Jiang JX. Polymorphisms in the toll-like receptor 9 gene associated with sepsis and multiple organ dysfunction after major blunt trauma. Br J Surg 2011; 98:1252-9. [PMID: 21633947 DOI: 10.1002/bjs.7532] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2011] [Indexed: 01/28/2023]
Abstract
BACKGROUND Toll-like receptor (TLR) 9 is the pattern recognition receptor for microbial DNA. Genetic variation within pattern recognition receptors for bacterial endotoxin and exotoxin has been shown to be associated with the risk of sepsis and organ dysfunction in critical illness. However, little is known about the clinical relevance of TLR9 gene polymorphisms in critical illness. METHODS A total of 557 patients with major blunt trauma were included in the study. Genetic variation data for the entire TLR9 gene were obtained from the HapMap Project. The genotypes of TLR9 gene polymorphisms were determined using a pyrosequencing method. Whole peripheral blood samples obtained immediately after admission were stimulated with bacterial DNA and production of tumour necrosis factor (TNF) α was then determined. Sepsis morbidity rate and multiple organ dysfunction (MOD) scores were assessed. RESULTS Of five single-nucleotide polymorphisms (SNPs) genotyped, four (rs187084, rs352139, rs352140 and rs352162) existed as common SNPs and were in strong linkage disequilibrium. Both rs187084 and rs352162 were significantly associated with TNF-α production by peripheral blood leucocytes in response to bacterial DNA stimulation and a higher sepsis morbidity rate in patients with major trauma. In addition, the rs352162 polymorphism was significantly associated with MOD scores, whereas rs187084 showed a trend to be associated with MOD score. CONCLUSION TLR9 polymorphisms rs187084 and rs352162 might be used to provide relevant risk estimates for the development of sepsis and MOD in patients with major trauma.
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Affiliation(s)
- K-H Chen
- State Key Laboratory of Trauma, Burns and Combined Injury, Institute of Surgery Research, Chongqing, China
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Abstract
INTRODUCTION Circulating endothelial cells (ECs) are known to reflect endothelial injury, and endothelial injury is associated with graft-versus-host disease (GVHD). We hypothesised that circulating ECs might be associated with systemic acute graft-versus-host disease (aGVHD). METHODS BALB/c (H-2k(d) ) mice were treated with total body irradiation and then infused with C57B/6-derived T-cell-depleted bone marrow (TCD-BM) cells or TCD-BM cells and splenocytes. Cyclosporine was used to prevent aGVHD. Circulating ECs and allogeneic lymphocytes were analysed by flow cytometry at multiple time points. The morphology and ultrastructure of the endothelium were examined by light microscopy or transmission electron microscopy. RESULTS The results indicated that the number of circulating ECs peaked at day 5 after lethal irradiation in all mice; allogenic transplanted mice (TCD-BM cells and splenocytes) developed typical aGVHD beginning at day 7, exhibiting both histological and clinical symptoms of disease. Circulating ECs peaked a second time at day 9 with aGVHD progression. However, following the administration of CSA, an absence of or a reduction in the amount of subsequent endothelial injury was observed. CONCLUSION Circulating ECs might be associated with systemic aGVHD.
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Affiliation(s)
- Z Yan
- Department of Haematology, Affiliated Hospital of Xuzhou Medical College, Xuzhou, China
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Abstract
Hematopoietic stem cells (HSCs) are derived from endothelium in the aortic-gonado-mesonephric (AGM) region during embryogenesis. But little is known about whether endothelial progenitor cells (EPCs) retain hematopoiesis potential after birth. In this study, we isolated adult EPCs from the bone marrow of C57BL/6 mice and identified them with an endothelial functional assay and by the CD31(+) CD133(+) CD45(-/dim) VEGFR2(+) phenotype. EPCs isolated from green fluorescence protein (GFP) transgenic C57BL/6 mice were cotransfused with bone marrow cells from wild-type C57BL/6 mice into lethally irradiated BABL/c mice. One month after transplantation, granulocytes (25.73 ± 5.43%) and lymphocytes (12.68 ± 3.26%) in peripheral blood showed GFP(+), referred to as donor EPC-derived blood cells. After an additional month, the percentage of GFP(+) granulocytes decreased to (3.69 ± 1.43%), whereas the percentage of GFP(+) lymphocytes showed no significant difference. Most of the GFP(+) elements showed a diffuse distribution in the spleen; but some were present as aggregates forming lymphoid nodules. GFP(+) endothelial cells were observed in the liver sinusoids, intestinal villi, and lung of recipient mice. These results indicated that adult EPCs not only took part in vasculogenesis, but also retained hematopoietic ability.
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Affiliation(s)
- C Chen
- Department of Hematology, The Affiliated Hospital of Xuzhou Medical College, Jiangsu Prov, Xuzhou, China
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Zeng L, Jia L, Xu S, Yan Z, Ding S, Xu K. Vascular endothelium changes after conditioning in hematopoietic stem cell transplantation: role of cyclophosphamide and busulfan. Transplant Proc 2011; 42:2720-4. [PMID: 20832576 DOI: 10.1016/j.transproceed.2010.04.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2009] [Revised: 01/31/2010] [Accepted: 04/08/2010] [Indexed: 01/20/2023]
Abstract
Vascular endothelial injury, a feature of some complications of hematopoietic stem cell transplantation (HSCT), is characterized by increased endothelial cells. We investigated that classical pretreatment drugs in HSCT could result in vascular endothelial injury in mice. Six-to eight-week-old female BALB/c mice were divided into a control group, a cyclophosphamide group (60 mg/kg per day for 2 days) and a busulfan group (4 mg/kg per day for 4 days). We observed the general state of health and regularly counted the number of white blood cells. Circulating endothelial cells and their progenitors were estimated by flow cytometry. Morphologic endothelial changes were analyzed with optical and transmission electron microscopy. After conditioning with cyclophosphamide or busulfan, white blood cells fell to a low number with injuries noted on hematoxylin and eosin-stained pathology sections. Circulating endothelial cells and their progenitors peaked significantly higher than in the control group. Vascular endothelial injuries were observed in the 2 experimental groups by transmission electron microscopy. These data support the hypothesis the vascular endothelial injury occurs during conditioning with cyclophosphamide or busulfan for HSCT, with simultaneous mobilization of endothelial progenitor cells.
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Affiliation(s)
- L Zeng
- Department of Hematology, Affiliated Hospital of Xuzhou Medical College, PR China
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Nguyen J, Chow E, Zeng L, Zhang L, Culleton S, Holden L, Mitera G, Tsao M, Barnes E, Danjoux C, Sahgal A. Palliative response and functional interference outcomes using the Brief Pain Inventory for spinal bony metastases treated with conventional radiotherapy. Clin Oncol (R Coll Radiol) 2011; 23:485-91. [PMID: 21353506 DOI: 10.1016/j.clon.2011.01.507] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 11/09/2010] [Accepted: 12/14/2010] [Indexed: 01/14/2023]
Abstract
AIMS To report pain and functional interference responses in patients radiated for painful spinal metastases, and to determine if location within the vertebral column or dose fractionation are associated with response. MATERIALS AND METHODS Patients treated with palliative radiotherapy for symptomatic spinal metastases from May 2003 to June 2005 were analysed. All patients completed the Brief Pain Inventory (BPI) assessment tool at 1, 2 and 3 months after radiotherapy. The pain response was determined using the International Bone Metastases Consensus response definitions. Given seven BPI functional interference items, a Bonferroni adjusted P value of less than 0.007 was considered significant. RESULTS One hundred and nine treated patients were assessed. About 50% of patients were treated with a single fraction of 8Gy. All pain scores and functional interference scores significantly decreased over time after radiotherapy. At 3 months, 64% of patients achieved a response. Mood was significantly improved for responders (P=0.003) and a trend in improvement was observed for general activity (P=0.01) and normal work (P=0.04). Breast and prostate primaries were more likely to achieve an early response as compared with a lung primary. Neither location within the vertebral column or radiotherapy dose fractionation independently predicted for pain or functional interference responses. CONCLUSION Conventional radiotherapy with 8Gy in a single fraction for spine metastases resulted in effective palliation of pain at 3 months and had a positive effect on a patient's mood. Location within the spine was not a predictive factor.
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Affiliation(s)
- J Nguyen
- Rapid Response Radiotherapy Program, Department of Radiation Oncology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, University of Toronto, Canada
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Du XY, Zhu XD, Dong G, Lu J, Wang Y, Zeng L, Zhao TY, Ye HH, Li RS, Bai JY, Chen ZW. Characteristics of Circle of Willis Variations in the Mongolian Gerbil and a Newly Established Ischemia-Prone Gerbil Group. ILAR J 2011; 52:E1-7. [DOI: 10.1093/ilar.52.1.e1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Jon F, Zeng L, Culleton S, Zhang L, Holden L, May T, Barnes E, Saghal A, Danjoux C, Chow E. The Edmonton Symptom Assessment Scale (ESAS) as a Prognostic Indicator for Impending Death in Advanced Cancer Patients Referred for Palliative Radiotherapy. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.190] [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: 10/19/2022]
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214
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Khan L, Holden L, Zhang L, Culleton S, Zeng L, Jon F, Wong K, Danjoux C, Tsao M, Chow E. Prevalence of Sleep Disturbance in Patients with Bone Metastases Attending an Outpatient Radiotherapy Clinic. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1355] [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: 11/28/2022]
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215
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Qiu Y, Liu Y, Qi Z, Wang W, Kou Z, Zhang Q, Liu G, Liu T, Yang Y, Yang X, Xin Y, Li C, Cui B, Huang S, Liu H, Zeng L, Wang Z, Yang R, Wang H, Wang X. Comparison of Immunological Responses of Plague Vaccines F1 + rV270 and EV76 in Chinese-Origin Rhesus Macaque, Macaca mulatta. Scand J Immunol 2010; 72:425-33. [DOI: 10.1111/j.1365-3083.2010.02456.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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216
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Peebles WA, Rhodes TL, Hillesheim JC, Zeng L, Wannberg C. A novel, multichannel, comb-frequency Doppler backscatter system. Rev Sci Instrum 2010; 81:10D902. [PMID: 21033934 DOI: 10.1063/1.3464266] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Doppler backscattering has emerged in recent years as a powerful diagnostic tool in high temperature fusion plasmas. The technique is sensitive to plasma turbulence flow and has been utilized to determine radial electric field and to study geodesic acoustic modes, zonal flows, and intermediate scale density turbulence. The current manuscript describes a novel technique for creating a stable, multichannel system covering the V-band frequency range (50-75 GHz) which enables simultaneous monitoring of turbulent flows and fluctuation levels at eight distinct spatial locations. The system is based on a high-frequency, low phase noise comb-frequency generator combined with a filter bank and quadrature detection system. The system is now in operation on DIII-D and has allowed monitoring of the flow and turbulence levels across the plasma radius during events such as the L-H transition.
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Affiliation(s)
- W A Peebles
- University of California, Los Angeles, California 90095, USA.
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217
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Margariti A, Li H, Martin D, Zampetaki A, Hu Y, Xu Q, Zeng L. BAS/BSCR46 X-box binding protein 1 splicing triggers an autophagic survival pathway in endothelial cells. Heart 2010. [DOI: 10.1136/hrt.2010.205781.57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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218
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Martin D, Li H, Zampetaki A, Hu Y, Zeng L, Xu Q. YIA1 Interaction between HDAC3 and XBP1 is critical in maintainence of endothelial integrity. Heart 2010. [DOI: 10.1136/hrt.2010.205781.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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219
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Zeng L, Xiao Q, Li H, Margariti A, Hu Y, Xu Q. BAS/BSCR43 X-box binding protein 1 splicing is crucial in endothelial cell proliferation. Heart 2010. [DOI: 10.1136/hrt.2010.205781.54] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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220
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Alam S, Li H, Martin D, Zampetaki A, Hu Y, Xu Q, Zeng L. BAS/BSCR26 Histone deacetylase 3 protects endothelial cells from inflammation via regulation of galectin 9 expression. Heart 2010. [DOI: 10.1136/hrt.2010.205781.37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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221
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Bai X, Margariti A, Zeng L, Hu Y, Xu Q. YIA5 PKC deficiency accelerates neointimal lesions in a mouse model of vascular injury involving delayed re-endothelialisation and vasohibin-1 accumulation. Heart 2010. [DOI: 10.1136/hrt.2010.205781.5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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222
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Liu B, Zeng L, Mao J, Ren Q. Simulation of Levulinic Acid Adsorption in Packed Beds using Parallel Pore/Surface Diffusion Model. Chem Eng Technol 2010. [DOI: 10.1002/ceat.201000147] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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223
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Zeng L, Biernacka KM, Holly JMP, Jarrett C, Morrison AA, Morgan A, Winters ZE, Foulstone EJ, Shield JP, Perks CM. Hyperglycaemia confers resistance to chemotherapy on breast cancer cells: the role of fatty acid synthase. Endocr Relat Cancer 2010; 17:539-51. [PMID: 20356977 DOI: 10.1677/erc-09-0221] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The prognosis for women with breast cancer is adversely affected by the comorbidities of obesity and diabetes mellitus (DM), which are conditions associated with elevated levels of circulating fatty acids, hyperglycaemia and hyperinsulinaemia. We investigated the effects of exposure of non-malignant and malignant human breast epithelial cells to elevated levels of fatty acids and glucose on their growth, survival and response to chemotherapeutic agents. We found that palmitate induced cell death in the non-malignant cells but not in the malignant cells, which was abrogated through the inhibition of ceramide production and by oleate but not by IGF1. Fatty acid synthase (FAS) is responsible for the de novo synthesis of fatty acids from sugars, and is over-expressed in many epithelial cancers. Abundance of FAS was higher in malignant cells than in non-malignant cells, and was up-regulated by IGF1 in both cell types. IGF-induced growth of non-malignant cells was unaffected by suppression of FAS expression, whereas that of malignant cells was blocked as was their resistance to palmitate-induced cell death. Palmitate did not affect cell proliferation, whereas oleate promoted the growth of non-malignant cells but had the opposite effect, that is, inhibition of IGF1-induced growth of malignant cells. However, when the phosphatidylinositol 3-kinase pathway was inhibited, oleate enhanced IGF1-induced growth in both cell types. Hyperglycaemia conferred resistance on malignant cells, but not on non-malignant cells, to chemotherapy-induced cell death. This resistance was overcome by inhibiting FAS or ceramide production. Understanding the mechanisms involved in the associations between obesity, DM and breast cancer may lead to more effective treatment regimens and new therapeutic targets.
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Affiliation(s)
- L Zeng
- IGFs and Metabolic Endocrinology Group, Department of Clinical Sciences North Bristol, Learning & Research Building, 2nd floor, University of Bristol, Southmead Hospital, Bristol BS10 5NB, UK
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224
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Foulstone EJ, Holly JM, Zeng L, Winters ZE, Perks CM. Insulin-like growth factor binding protein-2 alters the sensitivity of breast cancer cells to chemotherapy. Breast Cancer Res 2010. [PMCID: PMC2875584 DOI: 10.1186/bcr2519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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225
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Xiong F, Sun M, Zhang X, Cai R, Zhou Y, Lou J, Zeng L, Sun Q, Xiao Q, Shang X, Wei X, Zhang T, Chen P, Xu X. Molecular epidemiological survey of haemoglobinopathies in the Guangxi Zhuang Autonomous Region of southern China. Clin Genet 2010; 78:139-48. [DOI: 10.1111/j.1399-0004.2010.01430.x] [Citation(s) in RCA: 173] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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226
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Nilsson MB, Zage PE, Zeng L, Xu L, Cascone T, Wu HK, Saigal B, Zweidler-McKay PA, Heymach JV. Multiple receptor tyrosine kinases regulate HIF-1α and HIF-2α in normoxia and hypoxia in neuroblastoma: implications for antiangiogenic mechanisms of multikinase inhibitors. Oncogene 2010; 29:2938-49. [DOI: 10.1038/onc.2010.60] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Shaw P, Nath C, Trotman J, Gurney H, Zeng L, Kwan YL, Presgrave P, Tiley C, Joshua D, Kerridge I, McLachlan A, Earl J. Actual Weight To Calculate Surface Area Provides The Best Estimate Of AUC For Melphalan In Myeloma. Biol Blood Marrow Transplant 2010. [DOI: 10.1016/j.bbmt.2009.12.088] [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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228
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Zhou Q, Sun X, Zeng L, Liu J, Zhang Z. A randomized multicenter phase II clinical trial of mitoxantrone-loaded nanoparticles in the treatment of 108 patients with unresected hepatocellular carcinoma. Nanomedicine: Nanotechnology, Biology and Medicine 2009; 5:419-23. [DOI: 10.1016/j.nano.2009.01.009] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Revised: 01/02/2009] [Accepted: 01/16/2009] [Indexed: 12/14/2022]
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229
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Liu G, Guo H, Li X, Liu T, Zhang S, Ji C, Gan W, Zeng L. UP-1.126: The Expression of PCA3 mRNA in Urine Sediments Obtained after Prostatic Massage of Patients with Prostate Cancer. Urology 2009. [DOI: 10.1016/j.urology.2009.07.573] [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: 10/20/2022]
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Affiliation(s)
- R A Burne
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida 32610-0424, USA.
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231
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Abranches J, Zeng L, Bélanger M, Rodrigues PH, Simpson-Haidaris PJ, Akin D, Dunn WA, Progulske-Fox A, Burne RA. Invasion of human coronary artery endothelial cells by Streptococcus mutans OMZ175. ACTA ACUST UNITED AC 2009; 24:141-5. [PMID: 19239641 DOI: 10.1111/j.1399-302x.2008.00487.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Dissemination of oral bacteria into the bloodstream has been associated with eating, oral hygiene, and dental procedures; including tooth extraction, endodontic treatment, and periodontal surgery. Recently, studies identified Streptococcus mutans, the primary etiological agent of dental caries, as the most prevalent bacterial species found in clinical samples from patients who underwent heart valve and atheromatous plaque surgery. METHODS By using antibiotic protection assays, we tested the capacity of 14 strains of S. mutans to invade primary human coronary artery endothelial cells (HCAEC). RESULTS Serotype e strain B14 and serotype f strain OMZ175 of S. mutans were able to efficiently invade HCAEC. Among the tested strains, serotype f S. mutans OMZ175 was the most invasive, whereas strains of serotype c S. mutans, the most prevalent serotype in dental plaque, were not invasive. Based on its high invasion rate, we further investigated the invasive properties of serotype f OMZ175. Using transmission electron microscopy and antibiotic protection assays we demonstrate that S. mutans OMZ175 is capable of attaching to the HCAEC surface, entering the cells and surviving in HCAEC for at least 29 h. DISCUSSION Our findings highlight a potential role for S. mutans in the pathogenesis of certain cardiovascular diseases.
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Affiliation(s)
- J Abranches
- Center for Oral Biology, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
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Hofzumahaus A, Rohrer F, Lu K, Bohn B, Brauers T, Chang CC, Fuchs H, Holland F, Kita K, Kondo Y, Li X, Lou S, Shao M, Zeng L, Wahner A, Zhang Y. Amplified Trace Gas Removal in the Troposphere. Science 2009; 324:1702-4. [DOI: 10.1126/science.1164566] [Citation(s) in RCA: 465] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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233
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Lesscher HMB, Wallace MJ, Zeng L, Wang V, Deitchman JK, McMahon T, Messing RO, Newton PM. Amygdala protein kinase C epsilon controls alcohol consumption. Genes Brain Behav 2009; 8:493-9. [PMID: 19243450 DOI: 10.1111/j.1601-183x.2009.00485.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Alcoholism is a progressive disorder that involves the amygdala. Mice lacking protein kinase C epsilon (PKCepsilon) show reduced ethanol consumption, sensitivity and reward. We therefore investigated whether PKCepsilon signaling in the amygdala is involved in ethanol consumption. Local knockdown of PKCepsilon in the amygdala reduced ethanol consumption and preference in a limited-access paradigm. Further, mice that are heterozygous for the PKCepsilon allele consume less ethanol compared with wild-type mice in this paradigm. These mice have a >50% reduction in the abundance of PKCepsilon in the amygdala compared with wild-type mice. We conclude that amygdala PKCepsilon is important for ethanol consumption in mice.
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Affiliation(s)
- H M B Lesscher
- Department of Neurology, Ernest Gallo Clinic and Research Center, University of California at San Francisco, Emeryville, CA, USA.
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234
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Gavala M, Smith J, Zeng L, Bertics P. Stimulation of the Nucleotide Receptor P2RX7 Enhances LPS-Induced Interferon-beta Production in Murine Macrophages. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.855] [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: 11/15/2022]
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235
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Zeng L, Nath CE, Shaw PJ, Earl JW, McLachlan AJ. HPLC-UV assay for monitoring total and unbound mycophenolic acid concentrations in children. Biomed Chromatogr 2009; 23:92-100. [DOI: 10.1002/bmc.1088] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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236
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Guo B, Han BC, Tian Z, Zhao TY, Zeng L, Yang ZM, Yue ZP. Expression and hormonal regulation of IL-11Ralpha in canine uterus during early pregnancy. Reprod Domest Anim 2008; 44:779-82. [PMID: 18992081 DOI: 10.1111/j.1439-0531.2008.01072.x] [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: 12/01/2022]
Abstract
Embryo implantation is critical for the successful establishment of pregnancy. Interleukin-11 (IL-11) is essential for adequate decidualization in the mouse and human via binding to the specific IL-11 receptor alpha (IL-11Ralpha). But the expression and regulation of IL-11 and IL-11Ralpha in the canine endometrium remain unknown. The aim of this study was to investigate the differential expression of IL-11Ralpha in canine uterus during early pregnancy and its regulation under different conditions by in situ hybridization. Interleukin-11Ralpha mRNA was mainly localized in glandular epithelium in canine uterus. There was a low level of IL-11Ralpha expression in the glandular epithelium on days 6, 12 and 17 of pregnancy. On day 20 of pregnancy when embryo implanted, IL-11Ralpha mRNA was highly expressed in the glandular epithelium surrounding the embryo, but not in the luminal epithelium and stroma. On day 23 of pregnancy, the expression of IL-11Ralpha mRNA maintained a constant level compared with the expression of day 20 and increased on day 28 of pregnancy. During the oestrous cycle, a high level of IL-11Ralpha mRNA expression was seen in the oestrous uterus. Progesterone slightly induced the expression of IL-11Ralpha mRNA in the ovariectomized canine uterus. These results suggest that IL-11Ralpha expression is closely related to canine implantation and up-regulated by progesterone.
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Affiliation(s)
- B Guo
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun, P.R. China
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237
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Zeng L, Yan Z, Wang L, Du B, Pan X, Xu K. Irradiation Is an Early Determinant of Endothelial Injury During Hematopoietic Stem Cell Transplantation. Transplant Proc 2008; 40:2661-4. [DOI: 10.1016/j.transproceed.2008.08.062] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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238
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Schmitz L, Wang G, Hillesheim JC, Rhodes TL, Peebles WA, White AE, Zeng L, Carter TA, Solomon W. Detection of zonal flow spectra in DIII-D by a dual-channel Doppler backscattering system. Rev Sci Instrum 2008; 79:10F113. [PMID: 19044597 DOI: 10.1063/1.2953675] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Doppler backscattering (DBS) has been successfully used to measure the E x B flow velocity and local intermediate wavenumber density fluctuation levels in the DIII-D tokamak. Depending on the launch angle and the frequency of the probing beam, the signal backscattered from the plasma cut-off layer is sensitive to density fluctuations at a specific perpendicular wavenumber (1 < or = k(perpendicular rho(s)) < or = 4). Due to the localization and high time resolution for poloidal flow measurements, DBS is well suited to detect stationary and time-dependent shear flows [zonal flows (ZFs)]. We present a novel scheme to measure ZF spectra using a dual-channel DBS system capable of simultaneously probing two minor radii separated by a distance of 0.2 cm < Delta r < 3 cm. Frequency spectra of geodesic acoustic modes and low frequency ZFs (f or = 10 kHz) have been obtained for 0.6 < r/a < 0.95.
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Affiliation(s)
- L Schmitz
- UCLA Physics and Astronomy Department, Los Angeles, California 90095-1547, USA
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239
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Nath CN, Zeng L, Eslick A, Trotman J, Earl JE. An isocratic UV HPLC assay for analysis of total and free melphalan concentrations in human plasma. ACTA CHROMATOGR 2008. [DOI: 10.1556/achrom.20.2008.3.6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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240
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241
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Perks CM, Morrison AA, Zeng L, Jarrett C, Shield J, Winters ZE, Holly JMP. Actions of IGF-I are differentially regulated by fatty acids in normal and breast cancer epithelial cells. Breast Cancer Res 2008. [PMCID: PMC3300742 DOI: 10.1186/bcr1923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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242
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Gao L, Qian S, Zeng L, Wang R, Wei G, Fan J, Zheng S. An animal model of human cytomegalovirus infection. Transplant Proc 2008; 39:3438-43. [PMID: 18089401 DOI: 10.1016/j.transproceed.2007.06.077] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2006] [Revised: 03/31/2007] [Accepted: 06/21/2007] [Indexed: 11/16/2022]
Abstract
To develop a rat model that allowed in vivo progressive human cytomegalovirus (HCMV) infection, allogeneic liver transplantation was performed across a rat combination of Dark Agouti (DA) to Brown Norway (BN). AD169, a well-characterized laboratory strain of HCMV, was used to establish a rat model of HCMV infection by injection of 0.4 mL (30.0 logTCID50) supernate into the rat peritoneum. Histological and blood specimens were obtained from animals sacrificed at predetermined timepoints. We performed immunohistochemical staining in liver, heart, kidney, spleen, and lung for HCMV immediate-early antigen (IE), lower matrix protein (pp65) detection in peripheral blood leukocytes, and HCMV early antigen (EA) and late antigen (LA). We compared survival rates. Our results showed positive HCMV IE and pp65 antigenemia detected in peripheral blood leukocytes in transplanted recipients from day 1 to day 30. Positive HCMV EA and LA staining cells were only detected in sections 10 days after liver transplantation, namely, in hepatocytes, mononuclear cells, bile duct epithelial cells, and endothelial cells. Successful HCMV replication was due to the combination of liver transplantation and cyclosporine (CsA) immunosuppression. Survival analysis showed no significant differences between the HCMV-infected group and HCMV-uninfected group. This new rat model of HCMV infection may be helpful to understand immune system modulation of HCMV infection.
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Affiliation(s)
- L Gao
- Department of Hepatobiliary and Pancreatic Surgery and Centre of Organ Transplantation, The First Affiliated Hospital, Nanchang University School of Medicine, Nanchang, China
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243
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Liu SJ, Sun YM, Tian DF, He YC, Zeng L, He Y, Ling CQ, Sun SH. Downregulated NM23-H1 expression is associated with intracranial invasion of nasopharyngeal carcinoma. Br J Cancer 2008; 98:363-9. [PMID: 18219290 PMCID: PMC2361469 DOI: 10.1038/sj.bjc.6604167] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Because the focus of nasopharyngeal carcinoma (NPC) is very close to intracranial organs, it often makes incursions into cranial cavity. Identification of intracranial invasion-associated indicators will provide potential therapeutic targets for NPC patients with intracranial invasion. In this regard, Human Xpro™ HC-plus cancer-related gene chip was utilised to screen intracranial invasion-associated genes for NPC from the biopsied primary focus tissue samples. In all, 8 upregulated and 23 downregulated genes were obtained. VEGF165 and MMP-9, the two upregulated genes, and NM23-H1, the downregulated one, were further confirmed by immunohistochemistry, quantitative real-time PCR and western blot. Invasion-associated cellular and nude mouse models were subsequently employed to study the biological properties of NM23-H1. NM23-H1 expression was significantly lower in 5-8F cells compared with that in 6-10B cells. Moreover, patch-clamp and transwell chamber were adopted to investigate the invading potential-associated biological dynamic mechanisms in the two cell lines, and Ca2+ current and motility were significantly elevated in 5-8F cells compared with that in 6-10B cells. Berberine, an inhibitor of Ca2+ current, could substantially increase the expression of NM23-H1 and decrease 5-8F cell motility. The specificity of berberine on NM23-H1 and cell motility was confirmed by RNAi assay.
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Affiliation(s)
- S J Liu
- Faculty of Integrative Medicine, Traditional Chinese Medicine University of Hunan, Changsha, People's Republic of China
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244
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Abstract
Histone lysine acetylation is central to epigenetic control of gene transcription. The bromodomain, found in chromatin-associated proteins and histone acetyltranferases, functions as the sole protein module known to bind acetyl-lysine motifs. Recent structural and functional analyses of bromodomains' recognition of lysine-acetylated peptides derived from major acetylation sites in histones and cellular proteins provide new insights into differences in ligand binding selectivity as well as unifying features of histone recognition by the bromodomains. These new findings highlight the functional importance of bromodomain/acetyl-lysine binding as a pivotal mechanism for regulating protein-protein interactions in histone-directed chromatin remodeling and gene transcription. These new studies also support the notion that functional diversity of a conserved bromodomain structural fold is achieved by evolutionary changes of structurally flexible amino-acid sequences in the ligand binding site such as the ZA and BC loops.
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Affiliation(s)
- S Mujtaba
- Department of Structural and Chemical Biology, Mount Sinai School of Medicine, New York, NY 10029, USA
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Abstract
Alpha-fodrin, an intracellular organ-specific cytoskeleton protein, was identified recently as an autoantigen associated with Sicca- and Sjögren's syndrome (SS). Identification of the antigenic determinants of alpha-fodrin is a prerequisite to developing highly sensitive and specific anti-alpha-fodrin antibodies, which provides potential means for the diagnosis of primary Sjögren's syndrome (pSS) in patients. Based on the structure and predicted antigenic sites of alpha-fodrin protein with 560 amino acids (alpha-fodrin 560), we prepared a set of overlapping recombinant protein fragments covering antigenic epitopes and synthesized a set of peptides derived from the alpha-fodrin protein. These recombinant proteins and synthesized peptides were subjected to screening with pSS patients sera, respectively. The peptide with the strongest immunoreactivity was used as antigenic peptide to define further the role of anti-alpha-fodrin-peptide antibodies in the sera of 135 patients with pSS, 48 patients with systemic lupus erythematosus (SLE), 88 patients with rheumatoid arthritis (RA) and 83 normal controls. Our data showed that the N-terminal peptide of amino acids 46-59 (N46) of alpha-fodrin 560 was the epitope with strongest antigenicity. The prevalences of anti-N46 peptide antibodies (alpha-N46PA) in patients with pSS, SLE, RA and normal controls were 78.5%, 10.4%, 21.6% and 6.0%, respectively. The sensitivity and specificity of the autoantibodies in pSS were 78.5% and 86.8%, respectively. These results suggest the alpha-N46PA which shows highest sensitivity and specificity is of significance to develop an effective diagnostic approach for pSS.
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Affiliation(s)
- Q Chen
- Laboratory of Molecular Diagnostics, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China
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247
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Ross JJ, Hong Z, Willenbring B, Zeng L, Isenberg B, Lee EH, Reyes M, Keirstead SA, Weir EK, Tranquillo RT, Verfaillie CM. Cytokine-induced differentiation of multipotent adult progenitor cells into functional smooth muscle cells. J Clin Invest 2007. [DOI: 10.1172/jci28184c1] [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: 11/17/2022] Open
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248
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Zage PE, Yan Q, Zeng L, Bean AJ. The role of EGFR trafficking in neuroblastoma. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.20003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
20003 Background: Signaling through growth factor receptors is important in neuroblastoma pathogenesis. Chromosome 1p36 is commonly deleted in neuroblastoma tumors and is associated with a poor prognosis. UBE4B, a gene in 1p36, has been reported mutated in high- risk neuroblastoma. We have found a direct interaction between UBE4B and hrs, a protein required for epidermal growth factor receptor (EGFR) trafficking, suggesting a link between EGFR trafficking and neuroblastoma pathogenesis. We have analyzed the role of UBE4B in the EGFR pathway in neuroblastoma cell lines. Methods: The expression of UBE4B, hrs and EGFR were analyzed by quantitative Western blot in a panel of 7 human neuroblastoma cell lines (SHEP, SKNAS, SKNSH, KCNR, SY5Y, LA155N, NGP). EGFR degradation rates were determined by examining the kinetics of cellular EGFR depletion following a pulse of ligand. Results: UBE4B levels were lowest in SKNAS and highest in NGP cells. Hrs levels were lowest in SKNSH cells and higher in other cell lines. EGFR levels were lowest in NGP and KCNR and highest in SKNAS cells. UBE4B levels were correlated with known 1p deletions. EGFR degradation rates were slowest in SKNAS cells and therefore correlated with cellular UBE4B levels. The low degradation rates were correlated with high cellular levels of EGFR. Conclusions: Expression levels of UBE4B are correlated in neuroblastoma cell lines with chromosome 1p deletions. Cell lines with lower levels of UBE4B degrade EGFR at a markedly slower rate, correlated with higher cellular EGFR levels. We hypothesize that UBE4B affects cell growth by interacting with hrs, directing EGFR for degradation. In its absence the ability of a cell to sort growth factor receptors for degradation is inhibited, resulting in growth factor receptor overabundance and uncontrolled cell growth. These results support the testing of EGFR inhibitors in a future phase I trial for children with neuroblastoma. No significant financial relationships to disclose.
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Affiliation(s)
- P. E. Zage
- MD Anderson Cancer Center, Houston, TX; University of Texas Medical School, Houston, TX
| | - Q. Yan
- MD Anderson Cancer Center, Houston, TX; University of Texas Medical School, Houston, TX
| | - L. Zeng
- MD Anderson Cancer Center, Houston, TX; University of Texas Medical School, Houston, TX
| | - A. J. Bean
- MD Anderson Cancer Center, Houston, TX; University of Texas Medical School, Houston, TX
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Zeng L, Derex L, Maarrawi J, Dailler F, Cakmak S, Nighoghossian N, Trouillas P. Lifesaving decompressive craniectomy in 'malignant' cerebral venous infarction. Eur J Neurol 2007; 14:e27-8. [PMID: 17222086 DOI: 10.1111/j.1468-1331.2006.01560.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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