Expressions of nucleoside diphosphate kinase (nm23) in tumor tissues are related with metastasis and length of survival of patients with hepatocellular carcinoma / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To evaluate the relationship of expressions of nucleoside diphosphate kinase (nm23) and proliferating cell nuclear antigen (PCNA), as well as apoptosis, with the prognosis of HCC patients by analyzing their pathological and clinical data.</p><p><b>METHODS</b>The expressions of nm23 and PCNA were analyzed by immunohistochemistry and the apoptotic phenomena were detected by TUNEL technique in the liver samples from 43 HCC tissues, 39 para-neoplastic tissues, and 10 normal tissues. The mean apoptosis index (AI) and proliferative index (PI) in individual sample were calculated.</p><p><b>RESULTS</b>As shown by the detection, 32.6% of carcinomas had negative nm23 signal in tumor tissues, whereas all para-neoplastic and normal tissues had positive nm23. The AI in nm23 positive HCC was significantly higher than that in nm23 negative one, with statistical difference (P<0.05). Furthermore, the expressions of nm23, and the values of AI and PI were contrastively analyzed with some main pathological and clinical data of HCC. It revealed that HCC with extrahepatic metastasis showed remarkable correlation with the negative nm23 (P=0.013) and higher PI values of HCC (P=0.015). The disease-free survival in HCC patients with negative nm23 expression was significantly poorer than that in patients with positive nm23 expression.</p><p><b>CONCLUSIONS</b>These data suggest that expressions of nm23 protein in tumor tissues are correlated with occurrences of metastasis and length of survival of the HCC patients, which may be an indicator for their prognosis.</p>

Full length nucleotide sequence analysis of L and M segments of Hantavirus Q32 strain gene / 中华实验和临床病毒学杂志

<p><b>BACKGROUND</b>To study the full length L and M sequence of Hantavirus Q32 strain gene and explore its molecular characters.</p><p><b>METHODS</b>The L and M segment cDNA of Hantavirus Q32 strain was amplified by RT-PCR. The purified PCR products were sequenced directly or cloned into pGEM-T Vector and then sequenced.</p><p><b>RESULTS</b>The L genome segment of Q32 virus was found to be 6533 nucleotides in length. One large open reading frame was found located at bases 38 to 6493. This was predicted to encode an L protein 2151 amino acids in length with a molecular mass of 2.46 x 10(5). The M genome segment was 3616 nucleotides in length. One open reading frame was located at bases 41 to 3488. This was predicted to encode an M protein 1135 amino acids with a molecular mass of 1.26 x 10(5).</p><p><b>CONCLUSION</b>The nucleotides sequence of M and L segments of strain Q32 was similar to that of other Hantavirus M and L segments. Deduced amino acid sequences of glycoprotein and RNA polymerase revealed high homologue to other Hantavirus.</p>