| 1 | 中国脊髓灰质炎Ⅱ型疫苗相关分离株病毒性状的观察显示文摘对1994年中国分离的13株脊髓灰质炎Ⅱ型疫苗相关株进行了PCR-RFLP分析,发现7株为重组病毒,毒力较疫苗株有回复。在Ⅱ型脊髓灰质炎病毒基因序列上,对于神经毒力有重要影响的第481位核苷酸发生了突变(C→G),另一个被视为重要位点的第2908位核苷酸无一发生变化,反而在第2909位核苷发生了高频率的点突变,意味着2909位点在中国Ⅱ型疫苗相关株的自然变异中可能起着重要作用。根据转基因小鼠实验和温度敏感实验(Rct-marker),脊髓灰质炎病毒的神经毒力大小并不与温度敏感实验所显示的毒力特征呈正相关性。 | 侯晓辉 张礼璧 T.Yoneyama K.Yoshii H.Shimizu H.Yoshida 李杰 郑红 方勇 朱宏 M.Hara Akio Hagiwara | 1997 | 病毒学报1997，13，4： | 10 |
| 2 | Recurrent chromosomal rearrangements at bands 8q24 and 11q13 in gastric cancer as detected by multicolor spectral karyotyping显示文摘AIM: To identify chromosomal translocations specific to gastric cancer (GC), spectral karyotyping (SKY) analysis was performed on established cell lines and cancerous ascitic fluids.METHODS: SKY analysis of 10 established cell lines and seven cancerous ascitic fluid samples identified recurrent chromosomal breakpoints and translocations in GC,several of which involved chromosomal loci of oncogenes or tumor suppressor genes.RESULTS: A total of 630 chromosomal breaks were identified. Chromosome no.8 was the most frequently involved in rearrangements (65 breaks), followed by chromosomes no. 11 (53), no. 1 (49), no. 7 (46), no. 13 (37), no. 3 (36), no. 17 (33), and no. 20 (29). Frequent breakpoints were detected in 8q24.1 (30 breaks), 11q13 (29), 13q14 (16), 20q11.2 (14), 7q32 (13), 17q11.2 (13),18q21 (12), 17q23 (9), 18q11.2 (9). SKY analysis identified a total of 242 chromosomal rearrangements including 190 reciprocal and non-reciprocal translocations. The recurrent combinations of chromosomal bands involved in translocations were 8q24.1 and 13q14 (3 cases), 8q24.1 and 11q13 (3), 11q13 and 17q11.2 (2), and 18q11.2 and 20q11.2 (2). Our study validated the ability of SKY to characterize in detail the chromosomal rearrangements in solid tumors and derived cell lines. Moreover,fluorescence in situ hybridization helped to identify the insertions, translocations, and homogeneously staining regions of MYCand CCND1 gene loci.CONCLUSION: The non-random co-localization of certain cytogenetic bands suggests the importance of chromosomal translocations in gastric carcinogenesis, by serving as landmarks for the cloning of GC causing genes. | Yasuhide Yamashita Kazuhiro Nishida Takashi Okuda Kenichi Nomura Yosuke Matsumoto Shoji Mitsufuji Shigeo Horiike Hiroyuki Hata Chohei Sakakura Akio Hagiwara Hisakazu Yamagishi Masafumi Taniwaki | 2005 | World Journal of Gastroenterology2005，11，33： | 4 |
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