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Updated: Sep 12, 2025

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Depot-Specific Roles for C/EBPα in White Adipose Tissue Development and Metabolism.

Krista Y Hu1, Esme A Dodge1, Olivia A B Maguire1

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The transcription factor C/EBPα is crucial for white adipose tissue (WAT) development and distribution. Adipocyte-specific knockout of Cebpa in mice reveals depot-specific roles and impacts metabolic homeostasis.

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Area of Science:

  • Metabolic disease research
  • Adipose tissue biology
  • Genetics and gene regulation

Background:

  • Rising rates of obesity and associated metabolic comorbidities highlight the need to understand white adipose tissue (WAT) distribution.
  • Genetic studies link single nucleotide polymorphisms (SNPs) near the CEBPA gene to cardiometabolic traits, suggesting a role in WAT distribution.
  • CEBPA encodes C/EBPα, a known regulator of adipocyte differentiation, but its depot-specific functions remain unclear.

Purpose of the Study:

  • To investigate the depot-specific roles of the transcription factor C/EBPα in white adipose tissue (WAT) development and function.
  • To elucidate the mechanisms by which CEBPA influences WAT distribution and its link to metabolic disease.

Main Methods:

  • Generation of adipocyte-specific Cebpa knockout (Cebpa_ASKO) mice.
  • Analysis of WAT depot characteristics (e.g., adipocyte size and number) in Cebpa_ASKO mice.
  • RNA sequencing (RNA-seq) and functional studies to assess lipid metabolism and adipocyte function.
  • Evaluation of metabolic phenotypes including brown adipose tissue (BAT), hepatic triglycerides, and plasma cholesterol.

Main Results:

  • Cebpa_ASKO mice exhibited a near-complete absence of gonadal WAT (gWAT) but retained inguinal WAT (iWAT).
  • Despite developing, iWAT in Cebpa_ASKO mice had fewer, larger adipocytes and impaired expansion under high-fat diet conditions.
  • Altered lipid metabolism and adipocyte function were observed in Cebpa_ASKO iWAT.
  • Metabolic disturbances included lipid-laden BAT, increased hepatic triglycerides, and elevated plasma cholesterol, exacerbated by high-fat feeding.

Conclusions:

  • C/EBPα plays critical depot-specific roles in adipose tissue development.
  • Adipocyte C/EBPα is essential for maintaining metabolic homeostasis.
  • Targeting C/EBPα may offer novel therapeutic strategies for obesity-related metabolic diseases.