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사람 유두종 바이러스 E6 단백질에 의한 death receptor 4의 발현및 세포사멸의 선택적 유도

Other Titles
 Selective expression of death receptor 4 and induction of apoptosis by HPV E6 
Authors
 최은아  ;  고현석  ;  신순아  ;  김건홍 
Citation
 Korean Journal of Gynecologic Oncology and Colposcopy (대한부인종양,콜포스코피학회지), Vol.13(2) : 139-145, 2002 
Journal Title
 Korean Journal of Gynecologic Oncology and Colposcopy (대한부인종양,콜포스코피학회지) 
ISSN
 2005-0380 
Issue Date
2002
Keywords
HPV ; E6 ; DR4 ; hTERT ; apoptosis
Abstract
Human papillomaviruses, especially type 16 and 18, have been known to be closely associated with human cervix cancer. The E6 and E7 proteins encoded by these viruses disrupt normal cell cycle regulation. The E7 protein interacts with pRb and abrogates its tumor-suppressive activity, while the E6 protein cooperates with E6AP, a ubiquitin E3 ligase, to tzrget p53 tumor suppressor protein for ubiquitin-dependent degradation. Telomerase activity is detected in more than 90% of immortalized and cancer cells but absent in most normal somatic cells and E6 oncoprotein could activate telomerase. In this experiment, we hypothesized that the hTERT promoter can be used for tumor-specific expression of transgenes to induce selective cancer cell death in HPV E6 positive cells. First, we tested whether hTERT core promoter is active only in cancer cells and whether the presence of E6 protein could potentiate the activation of the promoter by using luciferase construct and we found that hTERT promoter is active only in cancer cells, and the presence of E6 protein could augment hTERT promoter activity. Then, we constructed mammalian expression vector to express TRAIL-death Receptor (DR) 4 driven by hTERT promoter to test whether DR4 expression is induced by the promoter in the presence of E6 oncoprotein and we found that DR4 expression was induced. Finally, we tested whether the induction of DR4 could contribute to cancer cell death by observing caspase 3 activation and we found that in the presence of E6, caspase 3 activation is more evident than in the absence of £6. Taken together, our results reveal that the proper use of hTERT promoter could be useful and powerful for inducing selective cancer cell (especially for E6 positive cancer cells) death with effective death inducing transgene.
Full Text
http://kiss.kstudy.com/journal/thesis_name.asp?tname=kiss2002&key=1970702
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Biochemistry and Molecular Biology (생화학-분자생물학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kun Hong(김건홍) ORCID logo https://orcid.org/0000-0001-5639-6372
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/143564
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