21051
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21052
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21053
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21054
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21055
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Wei HS, Li DG, Lu HM, Zhan YT, Wang ZR, Huang X, Zhang J, Cheng JL, Xu QF. Effects of AT1 receptor antagonist, losartan, on rat hepatic fibrosis induced by CCl 4. World J Gastroenterol 2000; 6:540-545. [PMID: 11819643 PMCID: PMC4723553 DOI: 10.3748/wjg.v6.i4.540] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate effect o f losartan, an AT1 receptor antagonist, on hepatic fibrosis induced by CCl4; and to determine whether or not AT1 receptors are expressed on hepatic stellate cells.
METHODS AND RESULTS: Fifty male Sprague-Dawley rats, weighing (180 ± 20) g, were randomized into five groups (control group, model group, and three los artan treated groups), in which all rats were given the subcutaneous injection o f 40% CCl4 (every 3 days for 6 weeks) except for rats of control group. Rats of losartan-treated groups were treated with losartan (20 mg/kg, 10 mg/kg, 5 mg/kg, daily gavage). After 6 weeks liver tissue and serum samples of all rats were examined. Serum hyaluronic acid (HA), procollagen type III (PC III) were detected by radioimmunoassays. van Giesion collagen staining was used to evaluate the extracellular matrix of rats with liver fibrosis. The expression of AT1 receptors, transforming growth factor-beta (TGF-β), and alpha-smooth muscle actin (α-SMA) in liver tissue were determined by immunohistochemical techniques. Compared with model group, serum ALT and AST of losartan-treated groups were significantly reduced (t = 4. 20, P < 0.01 and t = 4.57, P < 0.01). Serum HA and PC III also had significant differences (t = 3.53, P < 0.01 and t = 2.20, P < 0.05). The degree of fibrosis was improved by losartan and correlated with the expressions of AT1 receptors, TGF-β, and α-SMA in liver tissue.
CONCLUSION: AT1 receptor antagonist, losartan, could limit the progression of the hepatic fibrosis induced by CCl4. The mechanism may be relat ed to the decrease in the expression of AT1 receptors and TGF-β, a meliorating the injury of hepatocytes; activation of local renin-angiotensin system might relate to hepatic fibrosis; and during progression of fibrosis, activated hepatic stellate cells might express AT1 receptors.
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21056
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21057
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Luo DZ, Vermijlen D, Ahishali BL, Triantis V, Vanderkerken K, Kuppen PJKK, Wisse E. Participation of CD45, NKR-P1A and ANK61 antigen in rat hepatic NK cell (pit cell)-mediated target cell cytotoxicity. World J Gastroenterol 2000; 6:546-552. [PMID: 11819644 PMCID: PMC4723554 DOI: 10.3748/wjg.v6.i4.546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: Several triggering receptors have been described to be involved in natural killer (NK) cell-mediated target cytotoxicity. In these studies, NK cells derive d from blood or spleen were used. Pit cells are liver-specific NK cells that possess a higher level of natural cytotoxicity and a different morphology when com pared to blood NK cells. The aim of this study was to characterize the role of t he NK-triggeringmoleculesNKR-P1A,ANK61antigen,and CD45 in pit cell-media ted killing of target cells.
METHODS: 51Cr-release and DNA fragmentation were used to quantify target cell lysis and apoptosis, respectively.
RESULTS: Flow cytometric analysis showed that pit cells expressed CD45, NK R-P1A, and ANK61 antigen. Treatment of pit cells with monoclonal antibody (mAb) to CD45 (ANK74) not only inhibited CC531s or YAC-1 target lysis but also apopto sis induced by pit cells. The mAbs to NKR-P1A (3.2.3) and ANK61 antigen (ANK61) had no effect on pit cell-mediated CC531s or YAC-1 target cytolysis or apoptosis, while they did increase the Fcγ receptor positive (Fcγ R+) P815 cytolysis and apoptosis. This enhanced cytotoxicity could be inhibited by 3,4-dichloroi socoumarin, an inhibitor of granzymes.
CONCLUSION: These results indicate that CD45 participates in pit cell-med iated CC531s and YAC-1 target cytolysis and apoptosis. NKR-P1A and ANK61 antig en on pit cells function as activation structures against Fcγ R+ P 815 cells, which was mediated by the perforin/granzyme pathway.
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21058
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21059
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Zhang H, Jiang SL, Yao XX. Study of T-lymphocyte subsets, nitric oxide, hexosamine and Helicobacter pylori infection in patients with chronic gastric diseases. World J Gastroenterol 2000; 6:601-604. [PMID: 11819657 PMCID: PMC4723567 DOI: 10.3748/wjg.v6.i4.601] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21060
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Gao W, Huang YX, Chen H, Song DY, Wang QL. Regulatory effects of electro-acupuncture at Zusanli on ir-SP content in rat pituitary gland and peripheral blood and their immunity. World J Gastroenterol 2000; 6:581-584. [PMID: 11819652 PMCID: PMC4723562 DOI: 10.3748/wjg.v6.i4.581] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21061
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21062
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Abstract
AIM: To evaluate a culture system for bile acid formation in primary human hepatocytes in comparison with HepG2 cells.
METHODS: Hepatocytes were isolated from normal human liver tissue and were cultured in serum-free William’s E medium. The medium was collected and re newed every 24 h. Bile acids and their precursors in media were finally analysed by gas chromatography-mass spectrometry.
RESULTS: Cholic acid (CA) and chenodeoxycholic acid (CDCA) conjugated with glycine or taurine accounted for 70% and 25% of total steroids. A third of CDC A was also conjugated with sulphuric acid. Dexamethasone and thyroid hormone alone or in combination did not significantly effect bile acid formation. The addit ion of cyclosporin A (10 μmol/L) inhibited the synthesis of CA and CDCA by about 13% and 30%, respectively.
CONCLUSION: Isolated human hepatocytes in primary culture behave as in the intact liver by converting cholesterol to conjugated CA and CDCA. This is in contrast to cultured HepG2 cells, which release large amounts of bile acid precursors and unconjugated bile acids into the medium.
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21063
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21064
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21065
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Jiang BJ, Sun RX, Lin H, Gao YF. Study on the risk factors of lymphatic metastasis and the indications of less in vasive operations in early gastric cancer. World J Gastroenterol 2000; 6:553-556. [PMID: 11819645 PMCID: PMC4723555 DOI: 10.3748/wjg.v6.i4.553] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21066
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Li ZR, Chi YL, Ke RC. Sutureless end-to-end bowel anastomosis in rabbit using low-power CO 2 laser. World J Gastroenterol 2000; 6:557-560. [PMID: 11819646 PMCID: PMC4723556 DOI: 10.3748/wjg.v6.i4.557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21067
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21068
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Qin RY, Zou SQ, Wu ZD, Qiu FZ. Influence of splanchnic vascular infusion on the content of endotoxins in plasma and the translocation of intestinal bacteria in rats with acute hemorrhage necrosis pancreatitis. World J Gastroenterol 2000; 6:577-580. [PMID: 11819651 PMCID: PMC4723561 DOI: 10.3748/wjg.v6.i4.577] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21069
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21070
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21071
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Yang CQ, Wang JY, Fang GT, Liu JJ, Guo JS. Comparison between intravenous and peritoneal route on liver targeted uptake and expression of plasmid delivered by Glyco-poly-L-lysine. World J Gastroenterol 2000; 6:508-512. [PMID: 11819638 PMCID: PMC4723548 DOI: 10.3748/wjg.v6.i4.508] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To compare the effects of intravenous route and peritoneal route on liver targeted uptake and expression of plasmid delivered by galactose-terminal glyco-poly-L-lysine (G-PLL).
METHODS: The plasmid pTM/MMP-1 which could be expressed in eukaryotic cells was bound to G-PLL, and was then transferred into Wistar rats by intra venous and intraperitoneal injection. The expression and distribution of the plasmid were observed at different time periods by in situ hybridization and im munohistochemistry.
RESULTS: The plasmid could be expressed significantly within 24 h a fter being transferred in vivo by both intravenous and intraperitoneal routes. One week later the expression began to decrease, and could still be observed three weeks later. Although both the intravenous and intraperitoneal route could target-specifically deliver the plasmid to the liver, the effect of the former was better as compared to that of the latter.
CONCLUSION: Intravenous route is better for liver targeted uptake and expression of G-PLL-bound plasmids than the peritoneal route.
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21072
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Hou P, Tu ZX, Xu GM, Gong YF, Ji XH, Li ZS. Helicobacter pylorivacA genotypes and cagA status and their relationship to associated diseases. World J Gastroenterol 2000; 6:605-607. [PMID: 11819658 PMCID: PMC4723568 DOI: 10.3748/wjg.v6.i4.605] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21073
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Abstract
AIM: To compare the effects of liposomes and glyco-poly-L-lysine on liver tar geted uptake and expression of plasmid in rat liver.
METHODS: After binding with lipofectamine or galactose-terminal glyco-poly-L-lysine, the plasmid could be expressed in eukaryotic cells when injected into Wistar rats by intravenous route. At different time intervals after the injection, the distribution and expression of the plasmid in liver of rats were observed and compared using in situ hybridization and immunohistochemistry.
RESULTS: The expression of the plasmid binding to liposomes or G-PLL could be markedly observed 24 h later, and began to decrease one week later, but it still could be observed up to three weeks. Both liposomes and G-PLL could deliver the plasmid to the liver effectively, but the effect of the latter was better than the former concerning the distribution and expression of the plasmid targeted uptake in the liver.
CONCLUSION: G-PLL is better than liposome as the targeted carrier for delivering exogenous genes to the liver.
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21074
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Zhou JF, Cai D, Zhu YG, Yang JL, Peng CH, Yu YH. A study on relationship of nitric oxide, oxidation, peroxidation, lipoperoxidation with chronic chole-cystitis. World J Gastroenterol 2000; 6:501-507. [PMID: 11819637 PMCID: PMC4723547 DOI: 10.3748/wjg.v6.i4.501] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2000] [Revised: 02/26/2000] [Accepted: 03/05/2000] [Indexed: 02/06/2023] Open
Abstract
AIM:To study relationship of injury induced by nitric oxide, oxidation, peroxidation,lipoperoxidation with chronic cholecystitis.METHODS:The values of plasma nitric oxide (P-NO), plasma vitamin C (P-VC), plasma vitamin E (P-VE), plasma beta-carotene (P-beta-CAR), plasma lipoperoxides (P-LPO), erythrocyte superoxide dismutase (E-SOD), erythrocyte catalase (E-CAT), erythrocyte glutathione peroxidase (E-GSH-Px) activities and erythrocyte lipoperoxides (E-LPO) level in 77 patients with chronic cholecystitis and 80 healthy control subjects were determined, differences of the above average values between the patient group and the control group and differences of the average values between preoperative and postoperative patients were analyzed and compared, linear regression and correlation of the disease course with the above determination values as well as the stepwise regression and correlation of the course with the values were analyzed.RESULTS:Compared with the control group, the average values of P-NO, P-LPO, E-LPO were significantly increased (P<0.01), and of P-VC, P-VE, P-beta-CAR, E-SOD, E-CAT and E-GSH-Px decreased (P <0.01) in the patient group. The analysis of the linear regression and correlation showed that with prolonging of the course, the values of P-NO, P-LPO and E-LPO in the patients were gradually ascended and the values of P-VC,P-VE, P-beta-CAR, E-SOD, E-CAT and E-GSH-Px descended (P<0.01). The analysis of the stepwise regression and correlation indicated that the correlation of the course with P-NO, P-VE and P-beta-CAR values was the closest. Compared with the preoperative patients, the average values of P-NO, P-LPO and E-LPO were significantly decreased (P <0.01) and the average values of P-VC, E-SOD, E-CAT and E-GSH-Px in postoperative patients increased (P <0.01) in postoperative patients. But there was no significant difference in the average values of P-VE, P-beta-CAR preoperative and postoperative patients.CONCLUSION:Chronic cholecystitis could induce the increase of nitric oxide, oxidation, peroxidation and lipoperoxidation.
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21075
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Li J, Yang XK, Yu XX, Ge ML, Wang WL, Zhang J, Hou YD. Overexpression of p27(KIP1) induced cell cycle arrest in G(1) phase and subsequent apoptosis in HCC-9204 cell line. World J Gastroenterol 2000; 6:513-521. [PMID: 11819639 PMCID: PMC4723549 DOI: 10.3748/wjg.v6.i4.513] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2000] [Revised: 02/25/2000] [Accepted: 03/05/2000] [Indexed: 02/06/2023] Open
Abstract
AIM:We have previously reported that inducible over-expression of Bak may prolong cell cycle in G(1) phase and lead to apoptosis in HCC-9204 cells. This study is to investigate whether p27(KIP1) plays an important role in this process.METHODS:In order to elucidate the exact function of p27(KIP1) in this process, a zinc inducible p27(KIP1) stable transfectant and transient p27(KIP1)-GFP fusion transfectant were constructed. The effects of inducible p27(KIP1) on cell growth, cell cycle arrest and apoptosis were examined in the mock, control pMD vector, and pMD-KIP1 transfected HCC-9204 cells.RESULTS:This p27(KIP1)-GFP transfectant may transiently express the fusion gene. The cell growth was reduced by 35% at 48 h of p27(KIP1) induction with zinc treatment as determined by trypan blue exclusion assay. These differences remained the same after 72h of p27(KIP1) expression. p27(KIP1) caused cell cycle arrest after 24 h of induction, with 40% increase in G(1) population. Prolonged p27(KIP1) expression in this cell line induced apoptotic cell death reflected by TUNEL assay. Fourty-eight h and 72 h of p27(KIP1) expression showed a characteristic DNA ladder on agarose gel electrophoresis.CONCLUSION:Bak may induce cell cycle arrest in G(1) phase through upregulating expression of p27(KIP1) and subsequently lead to apoptosis in HCC-9204 cells. The p27(KIP1) -GFP fusion protein can be transiently expre-ssed in HCC-9204 cells. The inducible p27(KIP1)-expressing cell line provides a model to assess p27(KIP1) function.
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21076
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Niu Q, Tang ZY, Ma ZC, Qin LX, Zhang LH. Serum vascular endothelial growth factor is a potential biomarker of metastatic recurrence after curative resection of hepatocellular carcinoma. World J Gastroenterol 2000; 6:565-568. [PMID: 11819648 PMCID: PMC4723558 DOI: 10.3748/wjg.v6.i4.565] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2000] [Revised: 02/22/2000] [Accepted: 03/01/2000] [Indexed: 02/06/2023] Open
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21077
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Tian DY, Yang DF, Xia NS, Zhang ZG, Lei HB, Huang YC. The serological prevalence and risk factor analysis of hepatitis G virus infection in Hubei Province of China. World J Gastroenterol 2000; 6:585-587. [PMID: 11819653 PMCID: PMC4723563 DOI: 10.3748/wjg.v6.i4.585] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2000] [Revised: 02/20/2000] [Accepted: 02/25/2000] [Indexed: 02/06/2023] Open
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21078
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Tu SP, Zhong J, Tan JH, Jiang XH, Qiao MM, Wu YX, Jiang SH. Induction of apoptosis by arsenic trioxide and hydroxy camptothecin in gastriccancer cells in vitro. World J Gastroenterol 2000; 6:532-539. [PMID: 11819642 PMCID: PMC4723552 DOI: 10.3748/wjg.v6.i4.532] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2000] [Revised: 02/27/2000] [Accepted: 03/05/2000] [Indexed: 02/06/2023] Open
Abstract
AIM:To study the effects of arsenic trioxide and HCPT on dif ferent degrees of differentiated gastric cancer cells (SGC-7901, MKN-45, MKN-28) with respect to both cytotoxicity and induction of apoptosis in vitro.METHODS:The cytotoxicity of As(2)O(3) and HCPT on gastric cancer cells was det ermined by MTT assay.Morphologic changes of apoptosis of gastric cancer cells were observed by light microscopy and transmission electron microscopy.Apoptosis and cell cycle changes of gastric cancer cells induced by HCPT and As(2)O(3) we re investigated by TUNEL method and flow cytometry.RESULTS:As(2)O(3) and HCPT had remarkable cytotoxic effects on different degrees of differentiated gastric cancer cells. The IC(50) of As(2)O(3) on well differentiated gastric cancer cell MKN-28, moderately differentiated gastric cancer cell SGC-7901, and poorly differentiated gastric cancer cell MKN-28 were 8.91 &mgr;mol/L, 10.57 &mgr;mol/L, and 11.65&mgr;mol/L, respectively. The IC(50) of HCP T on MKN-28, SGC-7901, and MKN-45 were 9.35 mg/L, 10.21 mg/L,and 12.63 mg/L respectively after 48 h treatment. After 12 h of exposure to both drugs, gastric cancer cells exhibited morphologic features of apoptosis, includ ing cell shrinkage,nuclear condensation, and formation of apoptotic bodies. A ty pical subdiploid peak before G(0)/G(1) phase was observed by flow cytometry. The apoptotic rates of SGC-7901, MKN-45, and MKN-28 were 13.84%, 22.52%, and 9.68%, respectively after48 h exposure to 10&mgr;mol/L As(2)O(3). The apoptotic ra tes of SGC-7901, MKN-45, and MKN-28 were 21.88%, 12.35%, and 30.26%, resp ectively after 48 h exposure to 10 mg/L HCPT. The apoptotic indice were 7%-15% a s assessed by TUNEL method. The effect of As(2)O(3) on SGC-7901 showed remarkab le cell cycle specificity, which induced cell death in G(1) phase, and blocked G(2)/M phase.HCPT also showed a remarkable cell cycle specificity, by inducing cell death and apoptosis in G(1) phase and arrest of proliferation at Sphase.CONCLUSION:As(2)O(3) and HCPT exhibit significant cytotoxicity on gastric canc er cells by induction of apoptosis. As(2)O(3) and HCPT might have a promising pr ospect in the treatment of gastric cancer, which needs to be further studied.
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21079
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Abstract
AIM: To investigate the application of confocal laser scanning microscopy (CLSM) in tumor pathology and three-dimensional (3-D) reconstruction by CLSM in pathologic specimens of hepatocellular carcinoma (HCC).
METHODS: The 30 μm thick sections were cut from the paraffin-embedded tissues of HCC, hyperplasia and normal liver, stained with DNA fluorescent probe YOYO-1 iodide and examined by CLSM to collect optical sections of nuclei and 3-D images reconstructed.
RESULTS: HCC displayed chaotic arrangement of carcinoma cell nuclei, marked pleomorphism, indented and irregular nuclear surface, and irregular and coarse chromatin texture.
CONCLUSION: The serial optical tomograms of CLSM can be used to create 3-D reconstruction of cancer cell nuclei. Such 3-D impressions might be helpful or even essential in making an accurate diagnosis.
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21080
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21081
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Jiao XY, Shi JS, Wang JS, Yang YJ, He P. Effects of radical cholecystectomy on nutritional and immune status in patients with gallbladder carcinoma. World J Gastroenterol 2000; 6:445-447. [PMID: 11819625 PMCID: PMC4688779 DOI: 10.3748/wjg.v6.i3.445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21082
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21083
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Sithinamsuwan P, Piratvisuth T, Tanomkiat W, Apakupakul N, Tongyoo S. Review of 336 patients with hepatocellular carcinoma at Songklanagarind Hospital. World J Gastroenterol 2000; 6:339-343. [PMID: 11819593 PMCID: PMC4688747 DOI: 10.3748/wjg.v6.i3.339] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To determine the clinical presentations, survival and prognostic factors of hepatocellular carcinoma (HCC) in Southern Thailand.
METHODS: Retrospective analysis was performed on the 336 hepatocellular carcinoma patients treated at Songklanagarind hospital between 1 January 1991 and 31 January 1999.
RESULTS: Of these 336 patients, 276 were males and 60 were females. The mean age was 54.4 years. The common symptoms and signs were abdominal pain and hepatomegaly. The most common presentation of tumor was a dominant mass with daughter nodules. Portal vein involvement was found in 50% of total. Extra hepatic metastasis was found in 13%, and the lung was the most common site. There were 65.4% with evidence of cirrhosis and half of them were in Child's class B. HBsAg was positive in 72.6%. Regarding Okuda's tumor staging, 15%, 61% and 24% were stage I, II and III, respectively. Overall median survival was 2.1 months (11.5, 2.6 and 0.7 months for stage I, II and III respectively). Treatments of HCC improved patient survival (5.5 months vs 1.6 months for untreated patients). Most common causes of death were hepatic failure. Using multivariate analysis, the prognostic factors identified were tumor staging, alpha-fetoprotein level above 10000 μg·L-1, extrahepatic metastasis, portal vein thrombosis and treatment.
CONCLUSION: HCC in Thailand is a fatal disease with poor outcome due to late presentation and high prevalence of liver cirrhosis. Early detection and proper management may improve outcome.
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21084
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21085
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Wang Y, Liu H, Zhou Q, Li X. Analysis of point mutation in site 1896 of HBV precore and its detection in the tissues and serum of HCC patients. World J Gastroenterol 2000; 6:395-397. [PMID: 11819606 PMCID: PMC4688760 DOI: 10.3748/wjg.v6.i3.395] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21086
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Abstract
AIM: To evaluate the effects of Helicobacter pylori infection and other environmental factors on the development of gastric cancer.
METHODS: A population-based case-control study was conducted in Changle County, Fujian Province. The primary gastric cancer cases were histologically confirmed or diagnosed by surgery between January 1996 and March 1998. Healthy controls were randomly selected and matched by age, sex, and neighborhood of residence. A total of 101 pairs were included in the study. Specially trained interviewers conducted face-to-face interviews with the subjects according to a standardized questionnaire. Helicobacter pylori infections w ere measured by serum IgG antibody to Helicobacter pylori. Conditional Logistic Regression analysis was used.
RESULTS: The presence of IgG antibody to Helicobacter pylori was 63.7% in study subjects, 56.0% in patients with cardiac cancer, and 60.5% in patients with non-cardiac gastric cancer. The risk factors of gastric cancer in Changle County were identified such as low educational level [OR = 3.864; 95% confidence interval (95%CI) 1.604-9.311], low consumption of fresh vegetables (OR = 4.925; 95%CI: 1.356-17.885), high intake of fish sauce (OR = 10.587; 95%CI: 2.821-39.738), unscheduled meals (OR = 4.254; 95%CI: 1.445-12.552), and Helicobacter pylori infection (OR = 3.453; 95%CI: 0.901-13.224).
CONCLUSION: Helicobacter pylori infection may be important in the etiology of gastric cancer, but major risk factors other than Helicobacter pylori are responsible for the high gastric morbidity in Changle County.
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21087
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Abstract
AIM: To study the relationship between insulin A chain regions and insulin biological activities, we designed a series of insulin analogues with changes at A21, A12-18 of C-terminal helical region and A8-10 located in the region of A6-A11 intra-chain disulphide bond.
METHODS: Insulin A-chain analogues were prepared by stepwise Fmoc solid-phase manual synthesis and then combined with natural B-chain of porcine insulin to yield corresponding insulin analogues. Their biological activities were tested by receptor binding, mouse convulsion and immunological assay.
RESULTS: [A21Ala]Ins retains 70.3% receptor binding capacity and 60% in vivo biological activity. [DesA13-14, A21Ala]Ins and [DesA12-13-14-15, A21Ala] Ins still have definite biological activity, 7.9% and 4.0% receptor binding, and 6.2% and 3.3% in vivo biological activity respectively. [A15Asn, A17Pro, A21Ala]Ins maintains 10.4% receptor binding and 10% in vivo biological activity. [A8His, A9Arg, A10Pro, A21Ala]Ins, [A8His, A9Lys, A10Pro, A21Ala]Ins and [A8His, A9Lys, A10Arg, A21Ala]Ins have 51.9%, 44.3% and 32.1% receptor binding respectively, 50%, 40% and 30% in vivo biological activity respectively, and 28.8%, 29.6% and 15.4% immunological activity respectively.
CONCLUSION: A21Asn can be replaced by simple amino acid residues. The A chains with gradually damaged structur al integrity in A12-18 helical region and the demolition of the A12-18 helical region by the substitution of Pro and Asn for A17Glu and A15Gln respectively ca n combine with the B chain and the combination products show definite biological activity, the helical structure of A12-18 is essential for biological activities of insulin. A8-10 is not much concerned with biological activities, but is much more important antigenically in binding to its antibodies, these results may help us design a new type of insulin analogue molecule.
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21088
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Li H, Wang L, Wang SS, Gong J, Zeng XJ, Li RC, Nong Y, Huang YK, Chen XR, Huang ZN. Research on optimal immunization strategies for hepatitis B in different endemic areas in China. World J Gastroenterol 2000; 6:392-394. [PMID: 11819605 PMCID: PMC4688759 DOI: 10.3748/wjg.v6.i3.392] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21089
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Wen SJ, Xiang KJ, Huang ZH, Zhou R, Qi XZ. Construction of HBV-specific ribozyme and its recombinant with HDV and their cleavage activity in vitro. World J Gastroenterol 2000; 6:377-380. [PMID: 11819602 PMCID: PMC4688756 DOI: 10.3748/wjg.v6.i3.377] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To construct the recombinant of HDV cDNA and HBV-specific ribozyme gene by recombinant PCR in order to use HDV as a transporting vector carrying HBV-specific ribozyme into liver cells for inhibiting the replication of HBV.
METHODS: We separately cloned the ribozyme (RZ) gene and recombinant DVRZ (comprising HDV cDNA and HBV-specific ribozyme gene) into the downstream of T7 promoter of pTAdv-T vector and studied the in vitro cleavage activity of their transcripts (rRZ, rDVRZ) on target RNA (rBVCF) from in vitro transcription of HBV C gene fragment(BVCF).
RESULTS: Both the simple (rRZ) and the recombinant ribozyme rDVRZ could efficiently catalyze the cleavage of target RNA (rBVCF) under different temperatures (37 °C, 42 °C and 55 °C) and Mg2+ concentrations (10 mmol/L, 15 mmol/L and 20 mmol/L) and their catalytic activity tended to increase as the temperature was rising. But the activity of rRZ was evidently higher than that of rDVRZ.
CONCLUSION: The recombinant of HDV cDNA and ribozyme gene had the potential of being further explored and used in gene therapy of HBV infection.
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21090
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Saitoh O, Kojima K, Teranishi T, Nakagawa K, Kayazawa M, Nanri M, Egashira Y, Hirata I, Katsu Ki KI. Renal amyloidosis as a late complication of Crohn's disease: a case report and review of the literature from Japan. World J Gastroenterol 2000; 6:461-464. [PMID: 11819631 PMCID: PMC4688785 DOI: 10.3748/wjg.v6.i3.461] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21091
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Liu CH, Hu YY, Wang XL, Liu P, Xu LM. Effects of salvianolic acid-A on NIH/3T3 fibroblast proliferation, collagen synthesis and gene expression. World J Gastroenterol 2000; 6:361-364. [PMID: 11819598 PMCID: PMC4688752 DOI: 10.3748/wjg.v6.i3.361] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the mechanisms of salvianolic acid A (SA-A) against liver fibrosis in vitro.
METHODS: NIH/3T3 fibroblasts were cultured routinely, and incubated with 10-4 mol/L-10-7 mol/L SA-A for 22 h. The cell viability was assayed by [3H]proline incorporation, cell proliferation by [3H]TdR incorporation, cell collagen synthetic rate was measured with [3H]proline impulse and collagenase digestion method. The total RNA was prepared from the control cells and the drug treated cells respectively, and α (1) I pro-collagen mRNA expression was semi-quantitatively analyzed with RT-PCR.
RESULTS: 10-4 mol/L SA-A decreased cell viability and exerted some cytotoxiciy, while 10-5 mol/L-10-7 mol/L SA-A did not affect cell viability, but inhibited cell proliferation significantly, and 10-6 mol/L SA-A had the best effect on cell viability among these concentrations of drugs. 10-5 mol/L-10-6 mol/L SA-A inhibited intracellular collagen synthetic rate, but no significant influence on extracellular collagen secretion. Both 10-5 mol/L and 10-6 mol/L SA-A could decrease α (1) I pro-collagen mRNA expression remarkably.
CONCLUSION: SA-A had potent action against liver fibrosis. It inhibited NIH/3T3 fibroblast proliferation, intracellular collagen synthetic rate and type I pro-collagen gene expression, which may be one of the main mechanisms of the drug.
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21092
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21093
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21094
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Hong DF, Gao M, Bryner U, Cai XJ, Mou YP. Intraoperative endoscopic sphincterotomy for common bile duct stones during laparoscopic cholecystectomy. World J Gastroenterol 2000; 6:448-450. [PMID: 11819626 PMCID: PMC4688780 DOI: 10.3748/wjg.v6.i3.448] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21095
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21096
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Fu XB, Yang YH, Sun TZ, Gu XM, Jiang LX, Sun XQ, Sheng ZY. Effect of intestinal ischemia-reperfusion on expressions of endogenous basic fibroblast growth factor and transforming growth factor β in lung and its relation with lung repair. World J Gastroenterol 2000; 6:353-355. [PMID: 11819596 PMCID: PMC4688750 DOI: 10.3748/wjg.v6.i3.353] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To study the changes of endogenous transforming growth factor β (TGF-β) and basic fibroblast growth factor (bFGF) in lung following intestinal ischemia and reperfusion injury and their effects on lung injury and repair.
METHODS: Sixty Wistar rats were divided into five groups, which underwent sham-operation, ischemia (45 min), and reperfusion (6, 24 and 48 h, respectively) after ischemia (45 min). Immunohistochemical method was used to observe the localization and amounts of both growth factors.
RESULTS: Positive signals of both growth factors could be found in normal lung, mainly in alveolar cells and endothelial cells of vein. After ischemia and reperfusion insult, expressions of both growth factors were increased and their amounts at 6 h were larger than those of normal control or of 24 and 48 h after insult.
CONCLUSION: The endogenous bFGF and TGF-βexpression appears to be up-regulated in the lung following intestinal ischemia and reperfusion, suggesting that both growth factors may be involved in the process of lung injury and repair.
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21097
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Sun BH, Zhang J, Wang BJ, Zhao XP, Wang YK, Yu ZQ, Yang DL, Hao LJ. Analysis of in vivo patterns of caspase 3 gene expression in primary hepatocellular carcinoma and its relationship to p21WAF1 expression and hepatic apoptosis. World J Gastroenterol 2000; 6:356-360. [PMID: 11819597 PMCID: PMC4688751 DOI: 10.3748/wjg.v6.i3.356] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To detect the expression of caspase 3 gene in primary huma n hepatocellular carcinoma (HCC) and investigate its relationship to p21WAF1 gene expression and HCC apoptosis.
METHODS: In situ hybridization was employed to determine caspase 3 and p21WAF1 expression in HCC. In situ end-labeling was used to detect hepatocytic apoptosis in HCC.
RESULTS: Twenty-one of 39 (53.8%) cases of HCC were found to express caspase 3 transcripts, while 46.2% of HCC failed to express caspase 3. Non-cancerous adjacent liver tissues showed more positive caspase 3 (87.5%, 7/8) as compared with HCC (P < 0.05). The expression of caspase 3 is correlated with HCC differentiation, 72.2% (13/18) of moderately to highly differentiated HCC showed caspase 3 transcripts positive, while only 38.1% of poorly differentiated HCC harbored caspase 3 transcripts (P < 0.05). No relationship was found between caspase 3 expression and tumor size or grade or metastasis, although 62.5% (5/8) of HCC with metastasis were caspase 3 positive and a little higher than that with no metastasis (51.6%, P > 0.05). Expression of caspase 3 alone did not affect the apoptosis index (AI) of HCC. The AI was 7.12‰ in caspase 3-positive tumors (n = 21), while in caspase 3-negative cases (n = 18) 6.59‰ (P > 0.05). Expression of caspase 3 clearly segregated with p21WAF1 positive tumors as compared with p21WAF1 negative cases (16 of 23, 69.6% vs 5 of 16, 31.3%) with statistical significance(P = 0.017). In the cases with positive caspase 3 and negative p21WAF1, the AI was found slightly higher, but with no statistical significance, than that with expression of p21WAF1 and caspase 3 (7.21‰vs 6.98‰, P > 0.05).
CONCLUSION: Loss of caspase 3 expression may contribute to HCC carcinogenesis, although the expression of caspase 3 does not correlate well with cell apoptosis in HCC. p21WAF1 may be merely one of the inhibitors which can reduce caspase 3 mediated cell apoptosis in HCCs.
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21098
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21099
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Guo WJ, Zhou GD, Wu HJ, Liu YQ, Wu RG, Zhang WD. Ultrastructural localization of glutathione S-transferase-pi in human colorectal cancer cells. World J Gastroenterol 2000; 6:454-455. [PMID: 11819628 PMCID: PMC4688782 DOI: 10.3748/wjg.v6.i3.454] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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21100
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