Coordinated metabolic transitions and gene expression by NAD+ during adipogenesis

Adipocytes are the main cell type in adipose tissue, which is a critical regulator of metabolism, highly specialized in storing energy as fat. Adipocytes differentiate from multipotent mesenchymal stromal cells (hMSCs) through adipogenesis, a tightly controlled differentiation process involving clos...

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Bibliographic Details
Published in:The Journal of cell biology 2022-12, Vol.221 (12), p.1
Main Authors: Sánchez-Ramírez, Edgar, Ung, Thi Phuong Lien, Alarcón Del Carmen, Alejandro, del Toro-Ríos, Ximena, Fajardo-Orduña, Guadalupe R, Noriega, Lilia G, Cortés-Morales, Victor A, Tovar, Armando R, Montesinos, Juan José, Orozco-Solís, Ricardo, Stringari, Chiara, Aguilar-Arnal, Lorena
Format: Article
Language:English
Subjects:
Adenine
Adipocytes
Adipocytes - metabolism
Adipogenesis
Adipose tissue
Bioavailability
Biosynthesis
Cell Differentiation
Cell Metabolism
Chromatin or Epigenetics
Development
Differentiation
Dyslipidemia
Gene Expression
Life Sciences
Lipid metabolism
Lipids
Mesenchyme
Metabolism
Metabolites
NAD
NAD - metabolism
Nicotinamide
Nicotinamide adenine dinucleotide
Physics
SIRT1 protein
Sirtuin 1 - genetics
Sirtuin 1 - metabolism
Stromal cells
Therapeutic targets
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Summary:Adipocytes are the main cell type in adipose tissue, which is a critical regulator of metabolism, highly specialized in storing energy as fat. Adipocytes differentiate from multipotent mesenchymal stromal cells (hMSCs) through adipogenesis, a tightly controlled differentiation process involving close interplay between metabolic transitions and sequential programs of gene expression. However, the specific gears driving this interplay remain largely obscure. Additionally, the metabolite nicotinamide adenine dinucleotide (NAD+) is becoming increasingly recognized as a regulator of lipid metabolism, and a promising therapeutic target for dyslipidemia and obesity. Here, we explored how NAD+ bioavailability controls adipogenic differentiation from hMSC. We found a previously unappreciated repressive role for NAD+ on adipocyte commitment, while a functional NAD+-dependent deacetylase SIRT1 appeared crucial for terminal differentiation of pre-adipocytes. Repressing NAD+ biosynthesis during adipogenesis promoted the adipogenic transcriptional program, while two-photon microscopy and extracellular flux analyses suggest that SIRT1 activity mostly relies on the metabolic switch. Interestingly, SIRT1 controls subcellular compartmentalization of redox metabolism during adipogenesis.
ISSN:0021-9525
1540-8140
DOI:10.1083/jcb.202111137