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Activating Connexin43 gap junctions primes adipose tissue for therapeutic intervention

Acta Pharmaceutica Sinica B 2022年第7期12卷 3063-3072页

作者： Yi Zhu Na Li Mingyang Huang Xi Chen Yu AAn Jianping Li Shangang Zhao jan-bernd funck Jianhong Cao Zhenyan He Qingzhang Zhu Zhuzhen Zhang Zhao VWang Lin Xu Kevin W.Williams Chien Li Kevin Grove Philipp E.Scherer Touchstone Diabetes Center Department of Internal Medicinethe University of Texas Southwestern Medical Center at DallasDallasTX 75390USA Division of Cardiology Department of Internal Medicinethe University of Texas Southwestern Medical Center at DallasDallasTX 75390USA Division of Hypothalamic Research Department of Internal Medicinethe University of Texas Southwestern Medical Center at DallasDallasTX 75390USA Quantitative Biomedical Research Center Department of Population and Data Sciencesthe University of Texas Southwestern Medical Center at DallasDallasTX 75390USA Department of Pediatrics the University of Texas Southwestern Medical Center at DallasDallasTX 75390USA Novo Nordisk Research Center SeattleWA 98109USA Children’s Nutrition Research Center Department of PediatricsBaylor College of MedicineHoustonTX 77030USA Department of Cell Biology the University of Texas Southwestern Medical Center at DallasDallasTX 75390USA

Adipose tissue is a promising target for treating obesity and metabolic diseases.However,pharmacological agents usually fail to effectively engage adipocytes due to their extraordinarily large size and insufficient vascularization,especially in obese subjects.We have previously shown that during cold exposure,connexin43(Cx43)gap junctions are induced and activated to connect neighboring adipocytes to share limited sympathetic neuronal input amongst multiple cells.We reason the same mechanism may be leveraged to improve the efficacy of various pharmacological agents that target adipose tissue.Using an adipose tissue-specific Cx43 overexpression mouse model,we demonstrate effectiveness in connecting adipocytes to augment metabolic efficacy of theβ_(3)-adrenergic receptor agonist Mirabegron and FGF21.Additionally,combing those molecules with the Cx43 gap junction channel activator danegaptide shows a similar enhanced efficacy.In light of these findings,we propose a model in which connecting adipocytes via Cx43 gap junction channels primes adipose tissue to pharmacological agents designed to engage it.Thus,Cx43 gap junction activators hold great potential for combination with additional agents targeting adipose tissue.

关键词： GJA1 Adipose tissue Gap junction Connexin43 FGF21 β3-Adrenergic receptor agonist Obesity Type 2 diabetes

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