PMID- 33968168 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210513 IS - 1792-0981 (Print) IS - 1792-1015 (Electronic) IS - 1792-0981 (Linking) VI - 21 IP - 6 DP - 2021 Jun TI - Secreted frizzled-related protein 4 promotes brown adipocyte differentiation. PG - 637 LID - 10.3892/etm.2021.10069 [doi] LID - 637 AB - Secreted frizzled-related protein 4 (SFRP4) is a member of the SFRP family that contains a cysteine-rich domain homologous to the putative Wnt-binding site of frizzled proteins. In the present report, the effects of SFRP4 on murine brown adipocyte differentiation were evaluated, which exhibited an intrinsic capacity to differentiate with high efficiency. Brown preadipocytes were isolated from the scapular region of brown adipose tissue, which showed that the overexpression of recombinant active SFRP4 protein at three concentrations (1, 10 and 100 ng/ml) significantly increased the expression of adipocyte differentiation-associated genes (C/EBPalpha, C/EBPbeta, UCP-1, PRDM16, PGC1alpha and GLUT4) in a dose-dependent manner compared with the control group. Secondly, adiponectin protein expression was significantly inhibited in a dose-independent manner, while leptin was increased in brown adipocytes by incubation with the high concentration (100 ng/ml) of SFRP4. Thirdly, the role of interleukin-1beta (IL-1beta) was investigated in brown adipocytes and discovered that IL-1beta cannot induce SFRP4 mRNA expression in brown adipocytes, similar to human islet cells. These data suggested that SFRP4-treated brown adipocytes represent a valuable in vitro model for the study of adipogenesis and indicated that SFRP4 served various functions during brown adipocyte differentiation. CI - Copyright: (c) Guan et al. FAU - Guan, Hua AU - Guan H AD - Shaanxi Key Laboratory of Ischemic Cardiovascular Diseases and Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China. AD - Department of Anesthesiology, The Fourth Military Medical University Stomatological Hospital, Xi'an, Shaanxi 710032, P.R. China. FAU - Zheng, Huiyuan AU - Zheng H AD - Shaanxi Key Laboratory of Ischemic Cardiovascular Diseases and Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China. FAU - Zhang, Jin AU - Zhang J AD - Preventive Dentistry, The Fourth Military Medical University Stomatological Hospital, Xi'an, Shaanxi 710032, P.R. China. FAU - Xiang, Aoqi AU - Xiang A AD - Shaanxi Key Laboratory of Ischemic Cardiovascular Diseases and Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China. FAU - Li, Yongxin AU - Li Y AD - Department of Cardiovascular Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China. FAU - Zheng, Huadong AU - Zheng H AD - Shaanxi Key Laboratory of Ischemic Cardiovascular Diseases and Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China. FAU - Xu, Lixian AU - Xu L AD - Department of Anesthesiology, The Fourth Military Medical University Stomatological Hospital, Xi'an, Shaanxi 710032, P.R. China. FAU - Liu, Enqi AU - Liu E AD - Laboratory Animal Center, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi 710061, P.R. China. FAU - Yu, Qi AU - Yu Q AD - Shaanxi Key Laboratory of Ischemic Cardiovascular Diseases and Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, P.R. China. LA - eng PT - Journal Article DEP - 20210415 PL - Greece TA - Exp Ther Med JT - Experimental and therapeutic medicine JID - 101531947 PMC - PMC8097229 OTO - NOTNLM OT - SFRP4 OT - brown adipocyte OT - differentiation OT - inflammation OT - interleukin-1beta COIS- The authors declare that they have no competing interests. EDAT- 2021/05/11 06:00 MHDA- 2021/05/11 06:01 PMCR- 2021/04/15 CRDT- 2021/05/10 06:22 PHST- 2020/05/11 00:00 [received] PHST- 2021/03/08 00:00 [accepted] PHST- 2021/05/10 06:22 [entrez] PHST- 2021/05/11 06:00 [pubmed] PHST- 2021/05/11 06:01 [medline] PHST- 2021/04/15 00:00 [pmc-release] AID - ETM-0-0-10069 [pii] AID - 10.3892/etm.2021.10069 [doi] PST - ppublish SO - Exp Ther Med. 2021 Jun;21(6):637. doi: 10.3892/etm.2021.10069. Epub 2021 Apr 15.