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Latent TGFβ-binding proteins regulate UCP1 expression and function via TGFβ2.

D Halbgebauer1, J Roos2, J B Funcke2

  • 1Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany; Division of Pediatric Endocrinology and Diabetes, Department of Pediatrics and Adolescent Medicine, Ulm University Medical Center, Ulm, Germany.

Molecular Metabolism
|September 4, 2021
PubMed
Summary
This summary is machine-generated.

Latent transforming growth factor beta-binding proteins (LTBPs), specifically LTBP3, promote brown adipose tissue (BAT) development by influencing UCP1 expression and mitochondrial function via TGFβ2 signaling.

Keywords:
AdipogenesisAdipose tissueBrowningObesityTGF beta

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Area of Science:

  • Metabolism and Endocrinology
  • Cell Biology
  • Obesity Research

Background:

  • Brown adipose tissue (BAT) activation is a promising strategy for obesity and metabolic disease treatment.
  • Understanding the genetic regulation of human brown adipogenesis is crucial for therapeutic development.

Purpose of the Study:

  • To identify novel genetic factors involved in human brown adipogenesis.
  • To investigate the role of latent transforming growth factor beta-binding proteins (LTBPs) in adipocyte differentiation and function.

Main Methods:

  • Gene expression profiling of human adipose progenitor cells.
  • CRISPR/Cas9 gene editing to create LTBP-deficient preadipocytes.
  • Analysis of adipogenic differentiation, UCP1 expression, and mitochondrial oxygen consumption.

Main Results:

  • LTBP2 and LTBP3 deficiency reduced UCP1 expression and function in mature adipocytes.
  • The LTBP3-TGFβ2 axis was identified as a key regulator of UCP1 expression.
  • TGFβ2 signaling was shown to be critical for adipocyte UCP1 expression and mitochondrial activity.

Conclusions:

  • LTBP3 plays a significant role in promoting brown adipogenesis through the TGFβ2 pathway.
  • Modulation of the LTBP3-TGFβ2 axis impacts UCP1 expression and mitochondrial respiration.
  • This pathway is relevant for regulating brown adipose tissue function and potentially white adipose tissue browning.