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Platelets Modulate Leukocyte Population Composition Within Perivascular Adipose Tissue.

Adam Corken1,2, Tiffany Weinkopff3, Elizabeth C Wahl2

  • 1Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR 72202, USA.

International Journal of Molecular Sciences
|February 26, 2025
PubMed
Summary
This summary is machine-generated.

Platelets significantly alter immune cell composition in perivascular adipose tissue (PVAT), particularly monocytes and macrophages. Thoracic PVAT showed greater sensitivity to platelet depletion than abdominal PVAT.

Keywords:
Western dietleukocytesmacrophagesmonocytesobesityperivascular adipose tissueplatelets

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Area of Science:

  • Cardiovascular Biology
  • Immunology
  • Adipose Tissue Biology

Background:

  • Perivascular adipose tissue (PVAT) regulates vascular tone and contains immune cells.
  • Obesogenic diets disrupt PVAT function and vascular regulation.
  • Platelets influence leukocyte activity and tissue infiltration.

Purpose of the Study:

  • To investigate the role of platelets in regulating leukocyte populations within PVAT.
  • To determine if Western diet impacts PVAT leukocyte composition.
  • To assess the influence of platelet depletion on PVAT immune cells.

Main Methods:

  • Male C57Bl/6J mice were fed a Western diet for 2 or 8 weeks.
  • Platelet depletion was performed independently of diet.
  • Leukocyte composition in abdominal and thoracic PVAT was analyzed using flow cytometry.

Main Results:

  • Western diet alone did not significantly alter PVAT leukocyte composition.
  • Platelet depletion significantly disrupted PVAT leukocyte content, primarily impacting monocytes/macrophages.
  • Thoracic PVAT exhibited greater sensitivity to platelet depletion than abdominal PVAT.

Conclusions:

  • Platelets play a crucial role in modulating leukocyte populations within PVAT.
  • Diet-induced changes in PVAT leukocyte composition may be independent of platelet activity.
  • Platelet regulation of PVAT immune cells differs between anatomical depots.