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| 1 | The tumor-selective over-expression of the human Hsp 70 gene is attributed to the aberrant controls at both initiation and elongation levels of transcription显示文摘The tumor selective over-expression of the human Hsp70 gene has been well documented in human tumors,linked to the poor prognosis,being refractory to chemo-and radio-therapies as well as the advanced stage of tumorous lesions in particular.However,both the nature and details of aberrations in the control of the Hsp70 expression in tumor remain enigmatic.By comparing various upstream segments of the Hsp70 gene for each''s ability to drive the luciferase reporter genes in the context of the tumor cell lines varying in their p53 status and an immortal normal liver cell line,we demonstrated in a great detail the defects in the control mechanisms at the both initiation and elongation levels of transcription being instrumental to the tumor selective profile of its expression.Our data should not only offer new insights into our understanding of the tumor specific over-expression of the human Hsp70 gene,but also paved the way for the rational utilization of the tumor selective mechanism with the Hsp70 at the central stage fortargeting the therapeutic gene expression to human tumors. | LING CAI, JING DE ZHU,The State-key Laboratory for Oncogenes and Related Genes, Shanghai Cancer Institute, LN 25/2200, Xie-tu Road, Shanghai 200032, China | 2003 | Cell Research2003，13，2： | 13 |
| 2 | Cloning and characterization of human IC53-2,a novel CDK5 activator binding protein显示文摘We have identified IC53-2, a human homologue of the rat C53 gene from a human placenta cDNA library (GeneBank Accession No. AF217982). IC53-2 can bind to the CDK5 activator p35 by in vitro association assay. IC53-2 is mapped to human chromosome 17q21.31. The IC53-2 transcript is highly expressed in kidney, liver, skeletal muscle and placenta. It is abundantly expressed in SMMC-7721, C-33A, 3AO, A431and MCF-7 cancer cell lines by RT-PCR assay. Stable transfection of IC53-2 cDNA into the hepatocellularcarcinoma SMMC-7721 cell remarkably stimulates its growth in vitro. The above results indicate thatIC53-2 is a novel human gene, which may be involved in the regulation of cell proliferation. | YIHUXIE XIANGHUOHE YUNTIANTANG JINJUNLI ZHIMEIPAN WENXINQIN DAFANGWAN JIANRENGU | 2003 | Cell Research2003，13，2： | 1 |
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