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Adrenergic Reprogramming of Preexisting Adipogenic Trajectories Steer Naive Mural Cells Toward Beige Differentiation

Kathleen, D.; Cortez, B. N.; Lin, J. Z.; Lama, D.; Layne, M. D.; Farmer, S. R.; Rabhi, N.

2023-08-26 cell biology
10.1101/2023.08.26.554950 bioRxiv
Show abstract

In adult white adipose tissue, cold or {beta}3-adrenoceptor activation promotes the appearance of thermogenic beige adipocytes. Our comprehensive single-cell analysis revealed that these cells arise through the reprogramming of existing adipogenic trajectories, rather than from a single precursor. These trajectories predominantly arise from SM22-expressing vascular mural progenitor cells. Central in this transition is the activation of Adrb3 in mature adipocytes, leading to subsequent upregulation of Adrb1 in primed progenitors. Under thermoneutral conditions, synergistic activation of both Adrb3 and Adrb1 recapitulates the pattern of cold-induced SM22+ cell recruitment. Lipolysis-derived eicosanoids, specifically docosahexaenoic acid (DHA) and arachidonic acid (AA) prime these processes and in vitro, were sufficient to recapitulate progenitor cells priming. Collectively, our findings provide a robust model for cold-induced beige adipogenesis, emphasizing a profound relationship between mature adipocytes and mural cells during cold acclimation, and revealing the metabolic potential of this unique cellular reservoir.

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