Inhibition of hedgehog signaling promotes white adipose tissue browning. (1st December 2020)

• Record Type: Journal Article
• Authors: Zhang, Zhuo; Zhang, Xiao Xiao; Liu, Zhi Feng; Guo, Xi Rong; Cui, Xian Wei; Ji, Chen Bo; Zhong, Hong; Chi, Xia
• Is Part Of: Molecular and cellular endocrinology. Volume 518(2020)
• Publication Date: 2020-12-01
• Subjects: WAT browning -- Beige or brite adipocytes -- Hedgehog -- Primary cilium -- Obesity; BAT brown adipose tissue -- β-3AR β-3 adrenergic receptor -- eWAT epididymal white adipose tissue -- Gli1 glioma-associated oncogene homologue 1 -- hWAT cell preadipocyte of human subcutaneous WAT -- iWAT inguinal WAT -- NE norepinephrine -- Ptch1 patched 1 -- SAG smoothened agonist -- Smo smoothened -- Sufu suppressor of fused -- UCP1 uncoupling protein 1 -- vWAT visceral WAT; Endocrinology -- Periodicals; Molecular biology -- Periodicals; Cytology -- Periodicals; Endocrinology -- Periodicals; Hormones -- Periodicals; Endocrinologie -- Périodiques; Cytology; Endocrinology; Molecular biology; Periodicals; 573.4
• DOI: 10.1016/j.mce.2020.110970
• Languages: English
• ISSNs: 0303-7207

Abstract

Abstract: White adipose tissue (WAT) browning is a potential strategy to treat obesity, and is characterized by the formation of brown adipocytes induced by cold or β-3 adrenergic receptor (β-3AR) agonist treatment. The hedgehog (Hh) signaling at the primary cilium is closely related to obesity, and plays a key role in the differentiation and adipogenesis of adipocytes. However, little is known about its effects on WAT browning. In this study, browning models were used to evaluate the activity and effect of Hh signaling on WAT browning using Hh antagonists, agonist, and small-interfering RNAs (siRNAs) specific for glioma-associated oncogene homologue 1 (Gli1), smoothened (Smo), and suppressor of fused (Sufu). We observed that Hh signaling activity was inhibited during the browning process both in vivo and in vitro. Further, Hh signaling inhibition enhanced WAT browning, while its activation attenuated norepinephrine-induced browning. Thus, the inhibition of Hh signaling promotes WAT browning and therefore, Hh signaling may be a therapeutic target against obesity and associated comorbidities. Highlights: Hedgehog signaling is inhibited during WAT browning process. Repression of hedgehog signaling promotes WAT browning. Activation of hedgehog signaling attenuates NE-induced browning.