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Deficiency of ER Ca2+ sensor STIM1 in AgRP neurons confers p
AAV-GCaMP6m was used for in vivo calcium imaging experiment. (From BrainVTA)
The viruses used in this article from BrainVTA are in the table below
Calcium sensors  PT-0283 rAAV-EF1 -DIO-GCaMP6m-WPRE-hGH-polyA
Zhuo Chen, Susu Pan, Kaili Yin, Yuejin Zhang, Xiaoman Yuan, Sihan Wang, Shujuan Yang, Qing Shen, Yizhe Tang, Juxue Li, Youjun Wang, Yisheng Lu, Guo Zhang
Pub Date: 2021-10-19, DOI: 10.1016/j.celrep.2021.109868, Email: [email protected]
Store-operated calcium entry (SOCE) is pivotal in maintaining intracellular Ca2+ level and cell function; however, its role in obesity development remains largely unknown. Here, we show that the stromal interaction molecule 1 (Stim1), an endoplasmic reticulum (ER) Ca2+ sensor for SOCE, is critically involved in obesity development. Pharmacological blockade of SOCE in the brain, or disruption of Stim1 in hypothalamic agouti-related peptide (AgRP)-producing neurons (ASKO), significantly ameliorates dietary obesity and its associated metabolic disorders. Conversely, constitutive activation of Stim1 in AgRP neurons leads to an obesity-like phenotype. We show that the blockade of SOCE suppresses general translation in neuronal cells via the 2′,5′-oligoadenylate synthetase 3 (Oas3)-RNase L signaling. While Oas3 overexpression in AgRP neurons protects mice against dietary obesity, deactivation of RNase L in these neurons significantly abolishes the effect of ASKO. These findings highlight an important role of Stim1 and SOCE in the development of obesity.
In this study, the authors show that the inhibition of store-operated calcium entry ameliorates dietary obesity. Disruption of Stim1 in agouti-related peptide (AgRP)-producing neurons protects against dietary obesity and its related metabolic disorders. They show that the Oas3-RNase L signaling is required for the disruption of Stim1 in AgRP neurons to counteract dietary obesity.
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