276
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Li J, Zeng Q, Chen M, Jiang J, Zheng S. Comparison analysis of 1D/2D/3D neutronics modeling for a fusion reactor. FUSION ENGINEERING AND DESIGN 2008. [DOI: 10.1016/j.fusengdes.2008.06.051] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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277
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Feng J, Zhang M, Zheng S, Xie P, Ma A. Effects of High Temperature on Multiple Parameters of Broilers In Vitro and In Vivo. Poult Sci 2008; 87:2133-9. [DOI: 10.3382/ps.2007-00358] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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278
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Zheng S, Feng X, Qing D, Chen M, Dong J. The tolerance time limits of biliary tracts of liver grafts subjected to warm ischemia and cold preservation: an experimental study in swine. Transplant Proc 2008; 40:1629-34. [PMID: 18589163 DOI: 10.1016/j.transproceed.2008.01.072] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2007] [Accepted: 01/16/2008] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The objective of this study was to investigate the tolerance time limits of liver grafts and biliary tracts with warm ischemia to cold preservation providing experimental data to the prevent primary graft nonfunction and biliary necrosis after orthotopic liver transplantation (OLT). METHODS OLTs were performed in Bama miniature swine. Morphological and functional changes in the liver graft and biliary tracts were investigated after 10 minutes of warm ischemia and various durations of cold preservation. RESULTS When grafts were subjected to 10 minutes of warm ischemia followed by less than 16 hours of cold preservation, all animals survived 1 week; no animal died of biliary necrosis. However, when the cold preservation time exceeded 16 hours, the incidence of biliary necrosis increased significantly (P < .05) with deaths due to bile leaks. As cold preservation persisted, primary graft nonfunction and intraoperative or early postoperative deaths occurred, and all surviving animals developed biliary necrosis. When compared with the group undergoing less than 16 hours of cold preservation, the morphological scores and apoptosis index of epithelial cells of graft bile ducts were significantly increased among the group subjected to more than 16 hours of cold preservation after reperfusion (P < .05), whereas the activity of Na+-K+-ATPase and Ca2+-ATPase of graft bile ducts were reduced significantly (P < .05). Liver function tests showed the concentrations of alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma glutamyl transpeptidase, and alkaline phosphatase (ALP) decreased more slowly among the group undergoing more than 16 hours of cold preservation after operation. CONCLUSIONS We concluded that given 10 minutes of warm ischemia, cold preservation should be less than 16 hours to avoid early biliary necrosis; the corresponding tolerance time limit of the liver to cold preservation was less than 20 hours.
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Zhang A, Xiang J, Zhang M, Zheng S. Primary Hepatic Carcinoid Tumours: Clinical Features with an Emphasis on Carcinoid Syndrome and Recurrence. J Int Med Res 2008; 36:848-59. [PMID: 18652782 DOI: 10.1177/147323000803600428] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
This study sought to determine the clinical profiles and optimal management of primary hepatic carcinoid tumours. The clinical features of nine Chinese patients and 64 patients reported in the English-language literature were characterized. Recurrence rate and survival analysis were performed with the Kaplan–Meier method. The impact of surgical resection and post-operative recurrence on survival was determined by means of the log-rank test. Carcinoid syndrome complicated 10 cases (14%). Sixty-two patients (85%) underwent surgical resection. Actuarial 5-and 10-year survival rates for resected patients were 80% and 75%, respectively. Twelve patients experienced recurrences: the recurrence rate at 5 years post-operatively was 26%. All patients with resectable recurrent disease achieved good long-term survival and no significant relationship was found between recurrence and survival. Owing to the high incidence of recurrence, long-term follow-up is necessary and it is recommended that recurrent cases should be managed with judicious surgical resection.
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Xu W, Chen Y, Zheng S, Zhang S. The application of serum protein fingerprints in the postoperative follow-up of colorectal cancer. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.15044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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281
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Luo Y, Zhang A, Huang H, Zheng S. Haemolytic Uraemic Syndrome after Living-donor Liver Transplantation: Is Small-for-size Graft a Potential Risk Factor? J Int Med Res 2008; 36:599-604. [PMID: 18534145 DOI: 10.1177/147323000803600328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Haemolytic uraemic syndrome (HUS) is a rare complication of solid organ transplantation. Immunosuppressive drugs, including cyclosporin A and tacrolimus, have frequently been incriminated. Here we report a case of tacrolimus-induced HUS in a woman with small-for-size syndrome after living-donor liver transplantation. Hypertension, microangiopathic anaemia and end-stage renal failure occurred in the immediate post-transplant period; all other risk factors that might be implicated in the development of HUS were investigated and excluded if no evidence was found. A possible association between small-for-size syndrome, which frequently results in a high blood concentration of tacrolimus post-operatively, and the occurrence of HUS is discussed.
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Zheng S, Luo Y, Wang W, Xiao X. Analysis of the pathomorphology of the intra- and extrahepatic biliary system in biliary atresia. Eur J Pediatr Surg 2008; 18:98-102. [PMID: 18437653 DOI: 10.1055/s-2008-1038360] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
OBJECTIVE Aim of the study was to investigate the pathomorphological changes in the liver and triangular cord of the porta hepatis in biliary atresia and assess the relationship between the degree of differentiation of fibroblasts in the triangular cord of the porta hepatis and the liver fibrosis scores. METHODS From September 2005 to May 2006, 21 patients with biliary atresia (66+/-20 days old) underwent a Kasai procedure. The liver biopsy and the remnant of the porta hepatis were conserved. Five cases with cholestasis syndrome and 10 cases with choledochal cyst were used as a control group. Liver biopsies were performed in the control group. The micro- and ultrastructure of the liver and the remnant of the porta hepatis were assessed in the biliary atresia and the control group. Ultrastructural features were examined by transmission electron microscopy. The semiquantitative differences in liver fibrosis grading between the biliary atresia and the control group was evaluated with a 3-grade staging system. The degree of differentiation of fibroblasts (FB) in the triangular cord of the porta hepatis was assessed as follows: 1) juvenile type: above 50 % FBs were juvenile, 2) senior type: above 50% FBs were senior, 3) median type: between the former 2 types. The differentiation scores of FB in the porta hepatis were assessed in relation to the liver fibrosis score. RESULTS 1) The pathological changes with BA are characterized by inflammation and fibrosis in the hepatic portal area. The fibrosis scores in the biliary atresia group (I: 2 cases, II: 12 cases, III: 7 cases) were significantly higher than in the control group (I: 8 cases, II: 5 cases, III: 2 cases; p=0.01. 2) In the biliary atresia group, the extrahepatic biliary system of all cases showed a triangular cord in the porta hepatis. The triangular cord of porta hepatis was characterized by hyperplasia of canaliculi, atresia or stenosis of the bile ducts, inflammation infiltration, cholestasis, and interstitial fibrosis. 3) The ultrastructural features of BA showed active fibroblasts, a loss of microvilli, dense deposits in the hepatocytes and liver sinusoid, and dilatation of canaliculi. 4) The differentiation scores of FB in the porta hepatis were positively related to the liver fibrosis score (p=0.04). CONCLUSION The main pathological changes of biliary atresia are inflammation and fibrosis in the hepatic portal area. The ultrastructural features of biliary atresia suggested that the differentiation scores of FB in the triangular cord of the porta hepatis were positively related to the liver fibrosis score.
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Jia C, Wang W, Zhu Y, Zheng S. Suprahepatic vena cava manipulative bleeding alleviates hepatic ischemia-reperfusion injury in rats. Dig Liver Dis 2008; 40:285-92. [PMID: 18160354 DOI: 10.1016/j.dld.2007.10.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2007] [Revised: 10/23/2007] [Accepted: 10/25/2007] [Indexed: 12/11/2022]
Abstract
BACKGROUND Little is known about time course and peak level of reactive oxygen species in suprahepatic vena cava after liver ischemia-reperfusion. OBJECTIVE To determine time course and peak level of reactive oxygen species in suprahepatic vena cava after liver ischemia-reperfusion. To focus on the effects of suprahepatic vena cava manipulative bleeding on the hepatic ischemia-reperfusion injury in rat model. METHODS In experiment Part I, blood was taken from suprahepatic vena cava and infrahepatic vena cava for malondialdehyde detection at different time points after reperfusion. Furthermore, we treated the experimental rats in Part II by suprahepatic vena cava manipulative bleeding or infrahepatic vena cava manipulative bleeding at 10 min after reperfusion. RESULTS In experiment Part I, malondialdehyde concentration in suprahepatic vena cava elevated obviously with time and peaked at 10 min after reperfusion. The numbers of accumulated polymorphonuclear neutrophils was significantly increased in ischemia-reperfusion group from 10 min after reperfusion, compared with sham-operated group. In Part II, 2% of body weight suprahepatic vena cava manipulative bleeding with blood transfusion at 10 min after reperfusion significantly decreased circulating malondialdehyde, tumour necrosis factor-alpha, endothelin-1, hyaluronic acid, alanine aminotransferase, aspartate aminotransferase levels and polymorphonuclear neutrophil infiltrations in the liver. The 7-day survival rate of this group was 68.75% (11/16) which was significantly higher than other groups. CONCLUSIONS We provided the first evidence that 2% of body weight suprahepatic vena cava manipulative bleeding with blood transfusion at 10 min after reperfusion significantly prevented liver ischemia-reperfusion injury.
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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] [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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285
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Luo J, Qian JH, Yu JK, Zheng S, Xie X, Lu WG. Discovery of altered protein profiles in epithelial ovarian carcinogenesis by SELDI mass spectrometry. EUR J GYNAECOL ONCOL 2008; 29:233-238. [PMID: 18592785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVE Identification of proteomic alterations in epithelial ovarian tumorigenesis may facilitate the understanding of progression of this disease. METHODS Specific protein peak patterns were identified in 20 microdissected epithelial ovarian tumors (13 epithelial ovarian cancers (EOCs) and 7 low malignant potential (LMP) tumors), as well as in the matched normal cells. Protein profiles were generated by surface-enhanced laser desorption/ionization time of flight mass spectrometry (SELDI-TOF-MS) from all the different types of cells. RESULTS Among seven protein peaks from EOC cells, six were significantly increased while one was decreased compared with normal cells, and three peaks from LMP cells were markedly increased while one was decreased compared with normal cells. CONCLUSIONS The combination of SELDI and laser capture microdissection (LCM) is effective in finding the key molecules in ovarian tumorigenesis. Further identification of these protein peaks is important and these malignant protein signatures lend themselves to identification of populations at high-risk for EOC and for monitoring response to EOC chemopreventive agents.
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286
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Cheng L, Zhang S, Wang M, Davidson DD, Morton MJ, Huang J, Zheng S, Jones TD, Beck SD, Foster RS. Molecular genetic evidence supporting the neoplastic nature of stromal cells in 'fibrosis' after chemotherapy for testicular germ cell tumours. J Pathol 2007; 213:65-71. [PMID: 17634958 DOI: 10.1002/path.2202] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A residual retroperitoneal mass containing only fibrosis and necrosis is present in 40-52% of patients with advanced testicular germ cell tumours after chemotherapy. The biological nature and genetic characteristics of the stromal cells in these residual masses have not been adequately investigated. Laser-microdissected stromal cells from 27 patients who underwent retroperitoneal lymph node dissection after chemotherapy for metastatic testicular germ cell tumour were analysed. Allelic loss in the stromal cells of fibrosis was present at one or more of the ten microsatellite DNA loci examined in 23 (85%) of the cases. Chromosome arm 12p anomalies, the hallmark of germ cell neoplasia, were present in nine (33%) cases. The high frequency of allelic losses and chromosome arm 12p anomalies in the stromal cells from residual retroperitoneal fibrous masses after chemotherapy for testicular germ cell tumours suggests that the stromal cells are derived from the same tumour progenitor cells as the pre-existing metastatic germ cell tumour.
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Li Y, Lu L, Ding A, Hu H, Zeng Q, Zheng S, Wu Y. Benchmarking of MCAM 4.0 with the ITER 3D model. FUSION ENGINEERING AND DESIGN 2007. [DOI: 10.1016/j.fusengdes.2007.02.022] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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288
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Ye MF, Zheng S, Xu JH, Chen LR. Primary hepatic malignant fibrous histiocytoma: a case report and review of the literature. Histol Histopathol 2007; 22:1337-42. [PMID: 17701913 DOI: 10.14670/hh-22.1337] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Primary malignant fibrous histiocytoma (MFH) of the liver remains extremely rare with only several cases having been reported in literature. We report a case of hepatic MFH in a 53-year-old man who presented with upper abdominal pain, and weight loss for one month. Ultrasound and computed tomography (CT) scan showed a large mass with fine tumor vessels over the left lobe of the liver. Histopathological findings indicated a mesenchymal tumor consisting of spindle cells in storiform pattern intermingled with histiocyte-like cells and giant cells. Immunohistochemically, most tumor cells expressed vimentin, alpha-1 anti-chymotrypsin, alpha-1 antitrypsin and CD68. Morphological and immunohistochemical findings support that the tumor should be classified as a primary malignant fibrous histiocytoma. The literatures is briefly reviewed.
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Mershon J, Geiger M, Barrett-Connor E, Collins P, Kornitzer M, Dowsett S, Zheng S, Song J, Wenger N. Effect of coronary heart disease (CHD) risk factors and medications on invasive breast cancer risk in the Raloxifene Use for The Heart (RUTH) trial. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.1530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
1530 Background: RUTH enrolled 10,101 postmenopausal women at increased risk for major coronary events. Women were not enrolled based on their risk for breast cancer. The incidence of invasive breast cancer in the placebo group was low for this older population of women (mean age 67.5 years). The aim of this analysis was to determine whether CHD risk factors and selected cardiac medications were protective against invasive breast cancer in this population at increased risk for coronary events. Methods: Covariates assessed were baseline factors that are known CHD risk factors and selected medications ( Table ). Univariate analyses were performed for all covariates using placebo data. Results: The effect of baseline CHD risk factors and selected cardiac medications on the incidence of invasive breast cancer in women receiving placebo in RUTH (N=5057) Conclusions: In these postmenopausal women at increased risk for major coronary events, baseline CHD risk factors and selected cardiac medications assessed individually did not protect against invasive breast cancer. The low incidence of invasive breast cancer in the RUTH population does not appear to be due to the presence of CHD risk factors or use of cardiac medications. [Table: see text] [Table: see text]
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Zhang W, Wang M, Xie HY, Zhou L, Meng XQ, Shi J, Zheng S. Role of Reactive Oxygen Species in Mediating Hepatic Ischemia-Reperfusion Injury and Its Therapeutic Applications in Liver Transplantation. Transplant Proc 2007; 39:1332-7. [PMID: 17580134 DOI: 10.1016/j.transproceed.2006.11.021] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2006] [Accepted: 11/16/2006] [Indexed: 01/09/2023]
Abstract
Increasing evidence has shown that reactive oxygen species (ROS) are important mediators in liver ischemia/reperfusion injury(IRI). ROS include hydrogen peroxide (H(2)O(2)), superoxide anion (O(-2)), and hydroxyl radical (HO(-)), which may be generated by activated Kupffer cells in the liver, contributing to reperfusion injury. Hepatic IRI is a multistep process that damages liver graft function. To establish a series of therapeutic strategies to improve the outcome of liver transplantation, a good understanding of the mechanisms of IRI is essential. However, the detail mechanisms of how ROS lead to hepatocyte damage in IRI remains unclear. The aim of this review was to describe recent developments in the field of oxidative stress research. The first part of this review focused on the key roles and possible mechanisms of ROS in hepatic IRI. The second part of this review summarizes some findings including novel and classic antioxidant methods to ameliorate the hepatocyte damage during IRI.
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291
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Xu S, Zheng S, Shen X, Yao Z, Pivnichny J, Tong X. Automated sample preparation and purification of homogenized brain tissues. J Pharm Biomed Anal 2007; 44:581-5. [PMID: 17451908 DOI: 10.1016/j.jpba.2007.02.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2006] [Revised: 02/09/2007] [Accepted: 02/13/2007] [Indexed: 10/23/2022]
Abstract
A robotic homogenized tissue sample transferring method has been developed by using a Packard MultiProbe II 8-tip system. It enables robotically transferring homogenized tissue samples from individual test tubes into a 96-well format plate for further sample purification and analysis. Extensive validation has been made to establish the accuracy and variability of this method. This automatic tissue sample transferring approach combined with automatic tissue homogenization, has significantly increased the throughput of tissue sample preparation in screening of drug candidates using liquid chromatography coupled with highly sensitive and selective tandem mass spectrometry (LC-MS/MS).
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Zheng S, El-Naggar AK, Kim ES, Kurie JM, Lozano G. A genetic mouse model for metastatic lung cancer with gender differences in survival. Oncogene 2007; 26:6896-904. [PMID: 17486075 DOI: 10.1038/sj.onc.1210493] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Lung cancer is a devastating disease with poor prognosis. The design of better therapies for lung cancer patients would be greatly aided by good mouse models that closely resemble the human disease. Unfortunately, current models for lung adenocarcinoma are inadequate due to the absence of metastases. In this study, we incorporated both K-ras and p53 missense mutations into the mouse genome and established a more faithful genetic model for human lung adenocarcinoma, the most common type of lung cancer. Mice with both mutations developed advanced lung adenocarcinomas that were highly aggressive and metastasized to multiple intrathoracic and extrathoracic sites in a pattern similar to that of human lung cancer. These mice also showed a gender difference in cancer-related death. Additionally, the presence of both mutations induced pleural mesotheliomas in 23% of these mice. This mouse model recapitulates the metastatic nature of human lung cancer and will be invaluable to further probe the molecular basis of metastatic lung cancer and for translational studies.
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Zheng S, Alkan-Onyuksel H, Beissinger R, Wasan D. LIPOSOME MICROENCAPSULATIONS WITHOUT USING ANY ORGANIC SOLVENT. J DISPER SCI TECHNOL 2007. [DOI: 10.1080/01932699908943844] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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294
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Chen TC, Persons KS, Zheng S, Mathieu J, Holick MF, Lee YF, Bao B, Arai MA, Kittaka A. Evaluation of C-2-substituted 19-nor-1alpha,25-dihydroxyvitamin D3 analogs as therapeutic agents for prostate cancer. J Steroid Biochem Mol Biol 2007; 103:717-20. [PMID: 17207993 DOI: 10.1016/j.jsbmb.2006.12.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
1alpha,25-Dihydroxyvitamin D(3) (1alpha,25(OH)(2)D(3)) is known to inhibit the proliferation and invasiveness of prostate cancer cells. However, 1alpha,25(OH)(2)D(3) can cause hypercalcemia and is not suitable as a therapeutic agent. 19-Nor-vitamin D derivatives are known to be less calcemic when administered systemically. In order to develop more potent anti-cancer agents with less calcemic side effect, we therefore utilized (3)H-thymidine incorporation as an index for cell proliferation and examined the antiproliferative activities of nine C-2-substituted 19-nor-1alpha,25(OH)(2)D(3) analogs in the immortalized PZ-HPV-7 normal prostate cell line. Among the nine analogs we observed that the substitution with 2alpha- or 2beta-hydroxypropyl group produced two analogs having antiproliferative potency that is approximately 500- to 1000-fold higher than 1alpha,25(OH)(2)D(3). The (3)H-thymidine incorporation data were supported by the cell counting data after cells were treated with 1alpha,25(OH)(2)D(3), 19-nor-2alpha-(3-hydroxypropyl)-1alpha,25(OH)(2)D(3) or 19-nor-2beta-(3-hydroxypropyl)-1alpha,25(OH)(2)D(3) for 7 days. 19-Nor-2alpha-(3-hydroxypropyl)-1alpha,25(OH)(2)D(3) and 19-nor-2beta-(3-hydroxypropyl)-1alpha,25(OH)(2)D(3) were also shown to be about 10-fold more active than 1alpha,25(OH)(2)D(3) in cell invasion studies using prostate cancer cells. In conclusion, a substitution at the C-2 position of 19-nor-1alpha,25(OH)(2)D(3) molecule with a hydroxypropyl group greatly increased the antiproliferative and anti-invasion potencies. Thus, these two analogs could be developed to be effective therapeutic agents for treating early and late stages of prostate cancer.
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295
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Hu X, Huang P, Zheng S. Object extraction from an image of wear particles on a complex background. PATTERN RECOGNITION AND IMAGE ANALYSIS 2006. [DOI: 10.1134/s1054661806040109] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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296
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Zeng Q, Lu L, Ding A, Li Y, Hu H, Zheng S, Huang Q, Chen Y, Wu Y, Iida H. Update of ITER 3D basic neutronics model with MCAM. FUSION ENGINEERING AND DESIGN 2006. [DOI: 10.1016/j.fusengdes.2006.07.044] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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297
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Geng L, Jiang G, Fang Y, Dong S, Xie H, Chen Y, Shen M, Zheng S. B7-H1 expression is upregulated in peripheral blood CD14+ monocytes of patients with chronic hepatitis B virus infection, which correlates with higher serum IL-10 levels. J Viral Hepat 2006; 13:725-33. [PMID: 17052271 DOI: 10.1111/j.1365-2893.2006.00746.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Chronicity in hepatitis B virus (HBV) infection is maintained by increased type 2 T-helper cell response, possibly because of increased interleukin-10 (IL-10) productions. B7-H1 can negatively regulate T-cell responses via its receptor, programmed death 1. Ligation of B7-H1 to T-cells can result in the preferential secretion of IL-10. In this study, we investigated whether there was an upregulated expression of B7-H1 in peripheral blood mononuclear cells in patients chronically infected by HBV and further explored the correlation between B7-H1 expression and serum interleukin 2, interferon-gamma, IL-10, HBeAg, alanine aminotransferase (ALT) levels and viral load. Fifty-five patients with chronic HBV infection and 20 healthy controls (HCs) were enrolled in the present study. The results showed that in patients with chronic hepatitis B CD14+ monocytes but not CD3+ and CD19+ cells had a significantly increased expression of B7-H1 compared with HCs, which positively correlates with serum IL-10 levels and the presence of HBeAg and negatively correlates with serum ALT levels. In conclusion, chronic HBV patients harbour an increased B7-H1 expression in CD14+ monocytes compared with controls, which may be responsible for the increased serum IL-10 levels. This might be an important way by which HBV evades an adequate immune response, leading to viral persistence and disease chronicity.
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298
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Jian WX, Luo TH, Gu YY, Zhang HL, Zheng S, Dai M, Han JF, Zhao Y, Li G, Luo M. The visfatin gene is associated with glucose and lipid metabolism in a Chinese population. Diabet Med 2006; 23:967-73. [PMID: 16922702 DOI: 10.1111/j.1464-5491.2006.01909.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
AIMS Visfatin is a newly discovered adipokine found in abundance in visceral fat. It lowers plasma glucose in humans and mice. In this study, we explored the relationships between the plasma level of visfatin and genetic single nucleotide polymorphisms (SNPs) and Type 2 diabetes mellitus (T2DM) and anthropometric and metabolic parameters in Chinese subjects. METHODS Oral glucose tolerance tests (OGTT) and biochemical assays for plasma insulin, lipid profiles and serum visfatin were performed in 241 newly diagnosed T2DM patients, subjects with impaired glucose regulation (IGR), and normal glucose tolerant subjects more than 40 years of age. Genotyping for three SNP loci: -1535C/T, rs2058539 and rs10953502 were performed using the allele-specific real-time PCR method. RESULTS Visfatin levels were similar in T2DM patients, IGR and normal glucose tolerant subjects. However, visfatin levels were significantly lower in obese than normal-weight subjects (13.66 +/- 0.87 vs. 15.46 +/- 0.47 ng/ml, P = 0.03). There was suggestively significant correlation between visfatin level and body mass index (r = -0.17 P = 0.07) and waist-hip ratio (r = 0.16 P = 0.08) in male subjects, but not in female subjects. Allele and common haplotype frequencies of the three SNP loci were similar in T2DM patients, IGR and normal glucose tolerant subjects. However, significant associations were found between these three SNP loci and plasma glucose concentration at 0 and 120 min during OGTT, the area under the response curve for plasma glucose, and triglyceride and total cholesterol levels. CONCLUSIONS Serum visfatin levels may be related to visceral obesity in men, and the visfatin gene may account for variation of glucose and lipid parameters in Chinese subjects.
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Yuan HB, Huang Y, Zheng S, Zuo Z. Hypothermic preconditioning reduces Purkinje cell death possibly by preventing the over-expression of inducible nitric oxide synthase in rat cerebellar slices after an in vitro simulated ischemia. Neuroscience 2006; 142:381-9. [PMID: 16890370 DOI: 10.1016/j.neuroscience.2006.06.053] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2006] [Revised: 06/07/2006] [Accepted: 06/23/2006] [Indexed: 11/24/2022]
Abstract
We showed that hypothermic preconditioning (HPC) increased survival of Purkinje neurons in rat cerebellar slices after oxygen-glucose deprivation (OGD). HPC also reduced the OGD-increased expression of high mobility group I (Y) proteins, a transcription factor that can enhance inducible nitric oxide synthase (iNOS) expression. iNOS is a putatively damaging protein that contributes to ischemic brain injury. Heat shock proteins (HSPs) can be induced by various stimuli to protect cells. We hypothesize that HPC induces neuroprotection by reducing the expression of putatively damaging proteins such as iNOS and/or by increasing the expression of putatively protective proteins such as HSPs. Cerebellar slices were prepared from adult male Sprague-Dawley rats and incubated in circulating artificial cerebrospinal fluid. OGD was for 20 min at 37 degrees C and was followed by a 5-h recovery at 37 degrees C before slices were used for morphological, immunohistochemical and Western analyses. HPC was performed by incubating slices at 33 degrees C for 20 min at 1 h before the OGD. HPC and aminoguanidine, an iNOS inhibitor, prevented OGD-induced Purkinje cell death/injury. OGD increased the expression of iNOS and nitrosylated proteins. These increases were abolished by aminoguanidine and HPC. Interestingly, the expression of HSP70 was increased by OGD but not by HPC. Our results suggest that an increased iNOS expression contributes to the pathophysiology of OGD-induced Purkinje neuronal death in our model. Our results also suggest the involvement of inhibiting the expression of the putatively damaging iNOS proteins in the HPC-induced neuroprotection. HSP70 may not contribute to the HPC-induced neuroprotection.
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Wu F, Wu L, Zheng S, Ding W, Teng L, Wang Z, Ma Z, Zhao W. The clinical value of hepatocyte growth factor and its receptor--c-met for liver cancer patients with hepatectomy. Dig Liver Dis 2006; 38:490-7. [PMID: 16627020 DOI: 10.1016/j.dld.2006.03.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2005] [Revised: 03/04/2006] [Accepted: 03/06/2006] [Indexed: 12/11/2022]
Abstract
BACKGROUND To study the dynamic change of hepatocyte growth factor after hepatectomy in patients with primary liver cancer, and to analyse the prognostic value of hepatocyte growth factor and c-met for these patients. METHODS Thirty-one consecutive patients undergoing partial hepatectomy for liver cancer were studied. Serum hepatocyte growth factor level was determined by using enzyme-linked immunosorbent assay kit before and after operation, respectively. C-met protein and MRNA expressions in cancerous and paracancerous tissues were examined by immunohistochemical and RT-PCR methods, respectively. The correlations between clinical-pathologic parameters and the expressions of hepatocyte growth factor in serum and c-met in cancerous tissues were analysed, respectively. RESULTS Liver cancer patients had a significantly higher level of serum hepatocyte growth factor than normal controls (1.0424+/-0.498 ng/ml versus 0.685+/-0.115 ng/ml, p=0.008). Serum hepatocyte growth factor level was positively affected by tumour size, node cirrhosis, portal vein tumour thrombi, cholangiocarcinoma (including combined hepatocellular carcinoma), poorly differentiated hepatocellular carcinoma and tumour recurrence or metastases. After hepatectomy, serum hepatocyte growth factor level peaked on the third postoperative day, and then declined, but did not return to normal level on the postoperative day 10. From the preoperative day to postoperative day 10, the level of serum hepatocyte growth factor had a decrease of percent (85.33+/-10.2%) in the group with large tumours (>5 cm), but an elevation of percent (121.9+/-10.3%) in the group with small tumours (<or=5 cm). From the preoperative day to postoperative day 3, the level of serum hepatocyte growth factor had a higher elevation in the group with major resection than in the group with local resection (p=0.016). Moderately or strongly positive expression of c-met protein was observed in 27 cancerous regions (27/31), and only in 5 paracancerous regions. The intensive expression of c-met MRNA was 100% (31/31) detectable in the cancerous tissues, but only 22.6% (7/31) in the paracancerous tissues. C-met protein expression in cancerous tissues was correlated with portal vein tumour thrombi, cholangiocarcinoma and tumour recurrence or metastases, and the expression in paracancerous tissues was correlated with node cirrhosis. No significant correlation was observed between the hepatocyte growth factor in serum and c-met in cancerous tissues. CONCLUSION The over-expressions of the hepatocyte growth factor and c-met indicates an adverse prognosis for patients with liver cancer. The sustained high level of serum hepatocyte growth factor after hepatectomy may be a factor related to early tumour recurrence and metastasis. Liver regeneration may be a main factor leading to high level of serum hepatocyte growth factor in early postoperative stage.
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