ArticlebioRxiv : the preprint server for biology2026
Metabolic control of smooth muscle cell phenotype switching in atherosclerosis.
Article in bioRxiv : the preprint server for biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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13 authors.
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Abstract
The loss of smooth muscle cell (SMC) contractile phenotype contributes to various diseases including atherosclerosis. However, its metabolic basis is not entirely elucidated. Since the transforming growth factor beta (TGFβ) signaling is among principal regulators of SMC contractility, we studied metabolic regulation of TGFβ signaling in SMCs in vitro and atherosclerotic mouse models and human lesions. We found that TGFβ induced Ac-CoA synthetase 2 (ACSS2)-dependent Ac-CoA production, by suppressing pyruvate dehydrogenase kinase 4 (PDK4). This stabilized R-SMADs and TGFβ receptor 1, preserving SMC contractile phenotype. SMC-specific PDK4 knockout mimicked the effect of TGFβ signaling both metabolically and phenotypically, increasing glucose-derived synthesis of Ac-CoA and SMC contractile phenotype. SMC-specific Teaser: Reducing PDK4 metabolically restricts aortic plaque growth via TGFβ-dependent SMC contractility.
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