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The valosin‐containing protein is a novel repressor of cardiomyocyte hypertrophy induced by pressure overload
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhou, Ning Ma, Ben Stoll, Shaunrick Hays, Tristan T. Qiu, Hongyu |
| Copyright Year | 2017 |
| Abstract | Hypertension-induced left ventricular hypertrophy (LVH) is an independent risk factor for heart failure. Regression of LVH has emerged as a major goal in the treatment of hypertensive patients. Here, we tested our hypothesis that the valosin-containing protein (VCP), an ATPase associate protein, is a novel repressor of cardiomyocyte hypertrophy under the pressure overload stress. Left ventricular hypertrophy (LVH) was determined by echocardiography in 4-month male spontaneously hypertensive rats (SHRs) vs. age-matched normotensive Wistar Kyoto (WKY) rats. VCP expression was found to be significantly downregulated in the left ventricle (LV) tissues from SHRs vs. WKY rats. Pressure overload was induced by transverse aortic constriction (TAC) in wild-type (WT) mice. At the end of 2 weeks, mice with TAC developed significant LVH whereas the cardiac function remained unchanged. A significant reduction of VCP at both the mRNA and protein levels in hypertrophic LV tissue was found in TAC WT mice compared to sham controls. Valosin-containing protein VCP expression was also observed to be time- and dose-dependently reduced in vitro in isolated neonatal rat cardiomyocytes upon the treatment of angiotensin II. Conversely, transgenic (TG) mice with cardiac-specific overexpression of VCP showed a significant repression in TAC-induced LVH vs. litter-matched WT controls upon 2-week TAC. TAC-induced activation of the mechanistic target of rapamycin complex 1 (mTORC1) signaling observed in WT mice LVs was also significantly blunted in VCP TG mice. In conclusion, VCP acts as a novel repressor that is able to prevent cardiomyocyte hypertrophy from pressure overload by modulating the mTORC1 signaling pathway. |
| Starting Page | 1168 |
| Ending Page | 1179 |
| Page Count | 12 |
| File Format | PDF HTM / HTML |
| PubMed reference number | 28799247v1 |
| Alternate Webpage(s) | https://doi.org/10.1111/acel.12653 |
| DOI | 10.1111/acel.12653 |
| Journal | Aging cell |
| Volume Number | 16 |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Angiotensin II Angiotensins Animals, Transgenic Aortic Valve Stenosis Body tissue Echocardiography Heart Ventricle Heart failure Hypertensive disease Left Ventricular Hypertrophy Left ventricular structure Myocytes, Cardiac Patients Rats, Inbred WKY Repression, Psychology Signal Transduction Pathways Sirolimus Transcription Repressor/Corepressor VCP gene apolipoprotein E2 (Kyoto) valosin |
| Content Type | Text |
| Resource Type | Article |
