The DOI matches its Crossref record; 61 of the 61 references it cites were found in a registry or an index.
FoxO Transcription Factors Promote Autophagy in Cardiomyocytes
Open accessAbstract
In the heart, autophagy is required for normal cardiac function and also has been implicated in cardiovascular disease. FoxO transcription factors promote autophagy in skeletal muscle and have additional roles in regulation of cell size, proliferation, and metabolism. Here we investigate the role of FoxO transcription factors in regulating autophagy and cell size in cardiomyocytes. In cultured rat neonatal cardiomyocytes, glucose deprivation leads to decreased cell size and induction of autophagy pathway genes LC3, Gabarapl1, and Atg12. Likewise, overexpression of either FoxO1 or FoxO3 reduces cardiomyocyte cell size and induces expression of autophagy pathway genes. Moreover, inhibition of FoxO activity by dominant negative FoxO1 (Delta256) blocks cardiomyocyte cell size reduction upon starvation, suggesting the necessity of FoxO function in cardiomyocyte cell size regulation. Under starvation conditions, endogenous FoxO1 and FoxO3 are localized to the nucleus and bind to promoter sequences of Gabarapl1 and Atg12. In vivo studies show that cellular stress, such as starvation or ischemia/reperfusion in mice, results in induction of autophagy in the heart with concomitant dephosphorylation of FoxO, consistent with increased activity of nuclear FoxO transcription factors. Together these results provide evidence for an important role for FoxO1 and FoxO3 in regulating autophagy and cell size in cardiomyocytes.
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Self-citation
Cited by
FOXOs: signalling integrators for homeostasis maintenance
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AMP-Activated Protein Kinase (AMPK) Controls the Aging Process via an Integrated Signaling Network
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Long live FOXO : unraveling the role of FOXO proteins in aging and longevity
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Mitochondria-Ros Crosstalk in the Control of Cell Death and Aging
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Metadata
- Authors
- Sengupta, A., Molkentin, J. D., & Yutzey, K. E.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 2009-10
- Volume
- 284
- Issue
- 41
- Pages
- 28319-28331
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W2152602200
- Cited by
- 428
- References
- 61
- FWCI
- 9.36
- Type
- journal article
- Language
- en
- Open access
- hybrid
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