PMID- 18667775 OWN - NLM STAT- MEDLINE DCOM- 20090428 LR - 20211203 IS - 1672-7347 (Print) IS - 1672-7347 (Linking) VI - 33 IP - 7 DP - 2008 Jul TI - [Effeet of rapamycin on mTOR and eIF-4E expression in coxsackievirus B3-induced rat myocardial cells]. PG - 612-7 AB - OBJECTIVE: To observe the effeet of rapamycin, an inhibitor of mammalian target of rapamycin (mTOR), on mTOR and eukaryotic initiation factor-4E(eIF-4E)expression in coxsac-kievirus B3 (CVB3)-induced rat myocardial cells and to investigate the role of mTOR/eIF-4E signal pathway in viral myocarditis. METHODS: To construct a cell model of viral myocarditis with primary cultured myocardial cells. Myocardial cells infected by CVB3 were treated with 10 nmol/L rapamycin according to the cell toxicity test. The mTOR and eIF-4E expressions of cells were determined by RT-PCR and Western Blot. RESULTS: Rapamycin inhibited the degeneration of CVB3-induced myocardial cells. Expressions of mTOR and eIF-4E mRNA or protein in CVB3-induced myocardial cells were significantly upregulated compared with the control group (P < 0.05), and rapamycin (10 nmol/L) inhibited the upregulation (P < 0.05). CONCLUSION: Rapamycin can downregulate the expressions of mTOR and eIF-4E in CVB3-induced myocardial cells, suggesting that mTOR/eIF-4E signal transduction may play an important role in viral myocarditis. FAU - Chen, Chun-Yuan AU - Chen CY AD - Department of Pediatics, Third Xiangya Hospital, Central South University, Changsha 410013, China. FAU - Sun, Yue-Nu AU - Sun YN FAU - Yang, Zuo-Cheng AU - Yang ZC LA - chi PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - China TA - Zhong Nan Da Xue Xue Bao Yi Xue Ban JT - Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences JID - 101230586 RN - 0 (Eukaryotic Initiation Factor-4E) RN - EC 2.7.- (Protein Kinases) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.1.1 (mTOR protein, rat) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Animals MH - Animals, Newborn MH - Coxsackievirus Infections MH - *Enterovirus B, Human MH - Eukaryotic Initiation Factor-4E/*biosynthesis MH - *Myocarditis/metabolism/virology MH - Myocytes, Cardiac/metabolism MH - Protein Kinases/*biosynthesis MH - Rats MH - Rats, Sprague-Dawley MH - Signal Transduction MH - Sirolimus/*pharmacology MH - TOR Serine-Threonine Kinases EDAT- 2008/08/01 09:00 MHDA- 2009/04/29 09:00 CRDT- 2008/08/01 09:00 PHST- 2008/08/01 09:00 [pubmed] PHST- 2009/04/29 09:00 [medline] PHST- 2008/08/01 09:00 [entrez] AID - 1672-7347(2008)07-0612-06 [pii] PST - ppublish SO - Zhong Nan Da Xue Xue Bao Yi Xue Ban. 2008 Jul;33(7):612-7.