北京大学医学部机构知识库
Advanced  
IR@PKUHSC  > 北京大学第三临床医学院  > 胸外科  > 期刊论文
学科主题: 临床医学
题名:
Ischemic preconditioning-induced cardioprotection is lost in mice with immunoproteasome subunit low molecular mass polypeptide-2 deficiency
作者: Cai, Zheqing P.1; Shen, Zhenyun2; Van Kaer, Luc; Becker, Lewis C.1
关键词: ubiquitin-proteasome system ; reperfusion injury ; ubiquitin ; phosphatase and tensin homologue deleted on chromosome 10 PTEN ; Akt
刊名: FASEB JOURNAL
发表日期: 2008-12-01
DOI: 10.1096/fj.08-105940
卷: 22, 期:12, 页:4248-4257
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Biochemistry & Molecular Biology ; Biology ; Cell Biology
研究领域[WOS]: Biochemistry & Molecular Biology ; Life Sciences & Biomedicine - Other Topics ; Cell Biology
关键词[WOS]: PROTEIN-KINASE-C ; UBIQUITIN-PROTEASOME SYSTEM ; TUMOR-SUPPRESSOR PTEN ; VENTRICULAR HYPERTROPHY ; DAMAGED PROTEINS ; 26S PROTEASOME ; UP-REGULATION ; LMP2 ; DEGRADATION ; MYOCARDIUM
英文摘要:

The ubiquitin-proteasome system plays an important role in many cellular processes through degradation of specific proteins. Low molecular mass polypeptide 2 (LMP-2 or beta(1i)) is one important subunit of the immunoproteasome. Ischemic preconditioning (IPC) activates cell signaling pathways and generates cardioprotection but has not been linked to LMP-2 function previously. LMP-2 knockout mice (C57BL6 background) and wild-type C57BL6 mice were subjected to 30 min of ischemia (I-30) and 120 min of reperfusion (R-120) with or without preceding IPC (10 min of infusion and 5 min of reperfusion). IPC significantly increased left ventricular developed pressure and decreased infarct size in wild-type mice, but this protective effect of IPC was lost in LMP-2 knockout mice. IPC-mediated degradation of phosphatase and tensin homologue deleted on chromosome 10 (PTEN) and activation of the downstream protein kinase Akt were impaired in LMP-2 knockout hearts. The impairment of PTEN degradation was associated with defective immunoproteasomes and decreased proteolytic activities. When LMP-2 knockout mice were pretreated with the PTEN inhibitor bpV(HOpic), cardiac function was significantly improved, and myocardial infarct size was significantly reduced after I-30/R-120. In conclusion, LMP-2 is required for normal proteasomal function and IPC induction in the heart. Its action may be related to PTEN protein degradation.

语种: 英语
所属项目编号: P01-HL65608
项目资助者: National Heart, Lung, and Blood Institute, National Institutes of Health
WOS记录号: WOS:000261254800024
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/58411
Appears in Collections:北京大学第三临床医学院_胸外科_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Johns Hopkins Univ, Sch Med, Dept Med, Div Cardiol, Baltimore, MD 21205 USA
2.Peking Univ, Hosp 3, Dept Thorac Surg, Beijing 100871, Peoples R China
3.Vanderbilt Univ, Sch Med, Dept Microbiol & Immunol, Nashville, TN 37212 USA

Recommended Citation:
Cai, Zheqing P.,Shen, Zhenyun,Van Kaer, Luc,et al. Ischemic preconditioning-induced cardioprotection is lost in mice with immunoproteasome subunit low molecular mass polypeptide-2 deficiency[J]. FASEB JOURNAL,2008,22(12):4248-4257.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Cai, Zheqing P.]'s Articles
[Shen, Zhenyun]'s Articles
[Van Kaer, Luc]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Cai, Zheqing P.]‘s Articles
[Shen, Zhenyun]‘s Articles
[Van Kaer, Luc]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  北京大学医学部 - Feedback
Powered by CSpace