Peroxisome proliferator activated receptor gamma, CCAAT/enhancer-binding protein alpha, and cell cycle status regulate the commitment to adipocyte differentiation.
Shao D., Lazar MA.
Animal Study, published in J Biol Chem (1997) — summary generated from the PubMed abstract.
Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.
- Level A · Stronger Clinical Evidence
- Level B · Emerging clinical evidence with positive signals
- Level C · Early human research exploring benefits
- Level D · Scientific groundwork from lab and animal studies
- Emerging · Emerging topic under active research
This page is generated from the PubMed record. The Thai description is an automated summary of bibliographic fields and the abstract, not a full translation, and is not medical advice.
- Study type
- Animal Study
- Journal
- J Biol Chem (1997)
- Country
- United States
- Reported sample size
- —
- Source database
- PubMed
- PMID
- 9261165
- DOI
- 10.1074/jbc.272.34.21473
Abstract (original English)
Terminal differentiation of stem cells is characterized by cessation of cell proliferation as well as changes in cell morphology associated with the differentiated state. For adipocyte differentiation, independent lines of evidence show that the transcription factors peroxisome proliferator activated receptor gamma (PPARgamma) and CCAAT/enhancer-binding protein alpha (C/EBPalpha) as well as the tumor suppressor retinoblastoma (Rb) protein are essential. How these proteins promote adipocyte conversion and how they function cooperatively during the differentiation process remain unclear. We have used retinoic acid (RA) inhibition of adipogenesis to investigate these issues. RA blocked adipogenesis of 3T3-L1 cells induced to differentiate by ectopic expression of PPARgamma and C/EBPalpha independently or together. However, under these circumstances RA was only effective at preventing adipogenesis when added prior to confluence, suggesting that factors involved in regulation of the cell cycle might play a role in establishing the commitment state of adipogenesis that is insensitive to RA. During differentiation of wild type 3T3 L1 preadipocytes, we found that Rb protein is hyperphosphorylated early in adipogenesis, corresponding to previously quiescent cells re-entering the cell cycle, and later becomes hypophosphorylated. The data suggest that, together with the coexpression of PP
What this study does not prove
- • This study does not prove SVF is an approved treatment or a replacement for standard care.
- • This is preclinical work; animal or laboratory results cannot be applied to humans.
Evidence level
Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.
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