4th 2009 Annual Meeting of Korean Society for Glycoscience in 2009 (2009.11)바로가기
페이지
pp.29-29
저자
Jin Young Kim, Jae Kook Nam, Young Mee Kim, Hee Kyoung Lim, Ji Young Park, Jong won Lee, Moonjae Cho
언어
영어(ENG)
URL
https://www.earticle.net/Article/A192508
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원문정보
초록
영어
The ubiquitin-proteasome system is main degradation pathway of intracellular proteins in eukaryotes. This system is involved in a diverse cellular processes, including cell cycle regulation, stress response, intercellular signaling, transcription regulation, and acquired immunity.It works timely manner and, thus, irreversibly inactivate targeted proteins. However, how activity of 26S proteasome is regulated in each process is not well understood. Here we show that proteasome activity is regulated in EMT via TM4SF5 - slug mediated transcriptional regulation. Transmembrane 4 L6 family member 5(TM4SF5), a tumor antigen, is a member of tetraspanin. The TM4SF5 induces morphological elongation and epithelial-mesenchymal transition (EMT), in hepatocellular carcinoma. In this study, we found that the overexpression of TM4SF5 decreased level of total RNA but kept level of total protein through inhibition of proteasome activity. In TM4SF5-overexpressed hepatocarcinoma, mRNA level of 20s proteasome subunits except that of PSMB4 was decreased. Transcriptional down-regulation of 20s proteasome subunits caused decrease of proteasome activity. Also, when the EMT is induced by HGF, a typical EMT inducing agent, proteasome activity was inhibited. And the blockage of endogenous TM4SF4 by sh-TM4SF5 obstructed the EMT, which is induced by HGF. These results mean that inhibition of proteasome activity by TM4SF5 is a key step in EMT.
본 학회는 화학, 생화학, 분자생물학, 미생물학, 식품공학, 의학, 약학, 유전공학 및 생물공학, 환경 및 기타 공업 등 전 분야의 탄수화물관련 이론과 기술을 연구 발전시키고 산학협동을 통해 이를 보급하여 국내 관련 산업의 발전 및 국민생활의 과학화에 기여하고자 하며, 이러한 목표와 비젼의 실현을 위해 회원들이 적극적인 참여와 활동을 전개하고자 한다.
간행물
간행물명
한국당과학회 학술대회
간기
연간
수록기간
2006~2022
십진분류
KDC 517DDC 614
이 권호 내 다른 논문 / 한국당과학회 학술대회 4th 2009 Annual Meeting of Korean Society for Glycoscience in 2009