PMID- 26113535 OWN - NLM STAT- MEDLINE DCOM- 20160426 LR - 20211203 IS - 1539-7262 (Electronic) IS - 0022-2275 (Print) IS - 0022-2275 (Linking) VI - 56 IP - 8 DP - 2015 Aug TI - Foxc2 enhances proliferation and inhibits apoptosis through activating Akt/mTORC1 signaling pathway in mouse preadipocytes. PG - 1471-80 LID - 10.1194/jlr.M057679 [doi] AB - Forkhead box C2 (Foxc2) protein is a transcription factor in regulation of development, metabolism, and immunology. However, the regulatory mechanisms of Foxc2 on proliferation and apoptosis of preadipocytes are unclear. In this study, we found that high-fat-diet-induced obesity elevated the expression of Foxc2 and cyclin E after 6 weeks. Additionally, Foxc2 suppressed preadipocyte differentiation, increased cell counts and augmented G1-S transition of preadipocytes, along with the elevation of cyclin E expression and the reduction levels of p27 and p53. Furthermore, Foxc2 knockdown reduced early apoptotic cells with accompanying reduction of mitochondrial membrane potential and increased fragmentation of genomic DNA. We show that Foxc2 reduces the expression of Bax, caspase-9, and caspase-3 in both serum-starved and palmitic acid-induced cell apoptotic models, which confirms the anti-apoptotic role of Foxc2. Moreover, the protein kinase B (Akt)/mammalian target of rapamycin (mTOR)C1 signaling pathway and the ERK/mTORC1 signaling pathway were activated along with preadipocyte proliferation in response to Foxc2 overexpression, whereas apoptosis marker genes were downregulated during this process. Those effects were blocked by the interference of Foxc2 or signal pathways specific inhibitors. These data collectively reveal that Foxc2 enhances proliferation of preadipocytes and inhibits apoptosis of preadipocytes by activating the Akt/mTORC1 and ERK/mTORC1 signaling pathways. CI - Copyright (c) 2015 by the American Society for Biochemistry and Molecular Biology, Inc. FAU - Gan, Lu AU - Gan L AD - College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China. FAU - Liu, Zhenjiang AU - Liu Z AD - College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China. FAU - Jin, Wei AU - Jin W AD - College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China. FAU - Zhou, Zhongjie AU - Zhou Z AD - College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China. FAU - Sun, Chao AU - Sun C AD - College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150625 PL - United States TA - J Lipid Res JT - Journal of lipid research JID - 0376606 RN - 0 (Forkhead Transcription Factors) RN - 0 (Multiprotein Complexes) RN - 0 (Palmitates) RN - 0 (mesenchyme fork head 1 protein) RN - EC 2.7.11.1 (Mechanistic Target of Rapamycin Complex 1) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) SB - IM MH - Adipocytes/cytology MH - Animals MH - *Apoptosis/drug effects MH - Cell Count MH - Cell Cycle/drug effects MH - *Cell Differentiation/drug effects MH - Fibroblasts/*cytology/drug effects MH - Forkhead Transcription Factors/*metabolism MH - Male MH - Mechanistic Target of Rapamycin Complex 1 MH - Mice MH - Multiprotein Complexes/*metabolism MH - Palmitates/pharmacology MH - Proto-Oncogene Proteins c-akt/*metabolism MH - *Signal Transduction/drug effects MH - TOR Serine-Threonine Kinases/*metabolism PMC - PMC4513988 OTO - NOTNLM OT - cell death OT - cell signaling OT - fat OT - forkhead box C2 OT - protein kinase B/mammalian target of rapamycin C1 signaling pathway OT - transcription factor EDAT- 2015/06/27 06:00 MHDA- 2016/04/27 06:00 PMCR- 2016/08/01 CRDT- 2015/06/27 06:00 PHST- 2015/01/13 00:00 [received] PHST- 2015/06/27 06:00 [entrez] PHST- 2015/06/27 06:00 [pubmed] PHST- 2016/04/27 06:00 [medline] PHST- 2016/08/01 00:00 [pmc-release] AID - S0022-2275(20)35524-3 [pii] AID - m057679 [pii] AID - 10.1194/jlr.M057679 [doi] PST - ppublish SO - J Lipid Res. 2015 Aug;56(8):1471-80. doi: 10.1194/jlr.M057679. Epub 2015 Jun 25.