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Related Experiment Videos

Cellular changes during cold acclimatation in adipose tissues

B Cousin1, N Bascands-Viguerie, N Kassis

  • 1Laboratory Neurobiologie et Plasticité Tissulaire et Métabolisme Energétique, CNRS URA 1937, Université Paul Sabatier, Toulouse, France.

Journal of Cellular Physiology
|May 1, 1996
PubMed
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Cold exposure stimulates brown adipose tissue (BAT) differently in various fat pads. Periovarian fat promotes brown adipocyte differentiation without precursor proliferation, unlike interscapular BAT.

Area of Science:

  • Adipose tissue biology
  • Cellular differentiation
  • Physiological adaptation

Background:

  • Cold exposure is a known activator of the sympathetic nervous system and brown adipose tissue (BAT).
  • While interscapular BAT (IBAT) is well-studied, brown adipocytes are also found in white fat depots like periovarian (PO) fat.
  • Understanding precursor cell recruitment in different adipose tissues under cold stimulus is crucial.

Purpose of the Study:

  • To investigate the kinetic of brown precursor cell recruitment in adipose tissues upon cold exposure.
  • To compare the response of interscapular BAT (IBAT) and periovarian (PO) fat pad to cold stimulus.
  • To identify differences in precursor proliferation and differentiation between these adipose depots.

Main Methods:

  • Utilized DNA measurement to assess cell proliferation.

Related Experiment Videos

  • Analyzed specific marker expression, including A2COL6 for early differentiation.
  • Compared responses in IBAT and PO fat pad following cold exposure.

    • Main Results:

    • Cold exposure induced precursor cell proliferation and differentiation in IBAT, requiring chronic stimulation for full effect.
    • In PO fat, no precursor proliferation was observed; instead, brown preadipocyte differentiation and potential white adipocyte conversion were promoted.
    • A2COL6 expression confirmed early differentiation steps in both tissues, but kinetics differed.

    Conclusions:

    • Cold exposure elicits distinct responses in periovarian and brown adipose tissues regarding preadipocyte proliferation and differentiation.
    • Preadipocyte recruitment following cold exposure is dependent on the predominant fat cell type within the adipose tissue.
    • These findings highlight depot-specific adaptations to cold, influencing BAT expansion and function.