Wnt/b-catenin signaling pathway affects the protein expressions of caspase-3, XIAP and Grp-78 in hepatocellular carcinoma / 中华肝脏病杂志

To investigate the relationship and significance of Wnt/b-catenin signaling pathway with caspase-3, XIAP, HSP27and Grp-78. The HCC cell line HepG2 was transfected with small interfering RNA (siRNA) directed against b-catenin. After 72 and 96 h, protein was extracted and the protein expressions of b-catenin, caspase-3, XIAP, Grp-78 and HSP27 were detected by Western blot. b-catenin protein expression was inhibited at both time points and the expression at 96 h was higher than that at 72 h (F = 160.72, P is less than to 0.01). Interestingly, Caspase-3 protein expression was decreased at 72 h and increased to normal at 96 h (F = 136.10, P is less than to 0.01), while p-caspase-3 protein expression increased at 72 h and decreased to normal at 96 h (F = 98.65, P is less than to 0.01). XIAP protein expression decreased at 72 h (F = 37.29, P is less than to 0.01) and increased at 96 h. Grp-78 protein expression increased at 72 h and decreased to normal at 96 h ( F = 58.72, P is less than to 0.01). HSP27 protein expression showed no change following transfection ( F = 1.91, P is more than to 0.05). Wnt/b-catenin signaling pathway is related to the protein expressions of caspase-3, XIAP and Grp-78, but not related to HSP27 protein expression in HCC. Wnt/b-catenin signaling pathway may participate in the regulation of HCC apoptosis, proliferation and differentiation through affecting these factors.

The role and significance of Wnt/beta-catenin signaling pathway regulating the signaling molecules in hepatocellular carcinoma / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To investigate the role and significance of Wnt/beta-catenin signaling pathway regulating GSK-3beta, STAT3, Smad3 and TERT in hepatocellular carcinoma (HCC).</p><p><b>METHODS</b>The HCC cell line HepG2 was transfected with small interfering RNA (siRNA) directed against beta-catenin. Proteins were extracted and the expressions of beta-catenin, GSK-3beta, p-GSK-3beta, STAT3, Smad3 and TERT were detected by Western blot at 72 h and 96 h respectively after transfection.</p><p><b>RESULTS</b>beta-catenin expression was inhibited at both time points and the expression at 96 h was higher than that at 72 h (t = 4.43, P < 0.05). Interestingly, GSK-3beta and p-GSK-3beta expressions increased gradually at 72 and 96 h (tGSK-3beta= 4.98, tp-GSK-3beta= 29.83, P < 0.05) respectively, and STAT3 expression showed no alteration after transfection (F = 0.49, P > 0.05). Smad3 expression was increased at 72 h (t = 10.67, P < 0.05) and decreased to normal at 96 h (t = 1.26, P < 0.05), while TERT expression decreased at 72 h (t = 4.18, P is less than 0.05) and increased to normal at 96 h (t = 1.26, P > 0.05).</p><p><b>CONCLUSIONS</b>Wnt/beta-catenin signaling pathway is related to the expressions of GSK-3beta, Smad3 and TERT, but perhaps not related to STAT3 protein expression in HCC. It suggested that Wnt/beta-catenin signaling pathway might participate in HCC genesis and development through regulating the above three factors.</p>

Relationship between cytochrome P450IA1 gene polymorphism and susceptibility to colorectal carcinoma / 上海第二医科大学学报

0.05).Conclusion CYPIA1 MspⅠ polymorphism is not related to the susceptibility to colorectal carcinoma.

A clinical study on hepatitis B virus genotype / 中华流行病学杂志

<p><b>OBJECTIVE</b>To study the hepatitis B virus (HBV) genotype and its relation to clinical degree and responsiveness to antiviral therapy on hepatitis in order to guide the clinical therapy.</p><p><b>METHODS</b>We amplified HBV S gene by polymerase chain reaction (PCR), using the second-round PCR product, which was digested by restriction fragment length polymorphism (RFLP). This genotype method was designed under the analysis of the restriction fragment length polymorphism and using the restriction enzymes that identified the genotype-specific sequences. Five restriction enzymes, Hph I , Nci I , Alw I, Ear I and NlaIV, were identified in genotype-specific RFLP from the S gene region. Representative sequences from the S genome region of each HBV genotype were aligned to show the restriction sites by the five restriction enzymes. The amplified S gene nucleotide sequences were sequenced by dideoxy-chain-termination method and the corresponding amino acid sequence was deduced using DNASIS software. Later, they were genotyped by comparing to representative S gene sequences obtained from GenBank. This confirmed the results of RFLP HBV genotyping methods, coincident with that of S gene sequence.</p><p><b>RESULTS</b>Genotypes A, B, C, D were classified in 216 patients with HBV and DNA positive. The results showed that: 1 case (0.46%) of genotype A, 19 cases genotype B (8.8% ), 175 genotype C (81.02%) and 21 genotype D (9.72%). A total of 86 patients in the hospital were divided into either genotype C cases (69) or non-genotype C cases (17).</p><p><b>CONCLUSION</b>Genotype C was the major genotype in Changchun. Among HBV patients, type C was 80.95%, followed by genotypes B and D. Both hepatocellular carcinoma and liver cirrhosis showed relations with genotype C.</p>