Related Experiment Video

Updated: Sep 2, 2025

Isolation of Primary Patient-specific Aortic Smooth Muscle Cells and Semiquantitative Real-time Contraction Measurements In Vitro
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Platelet TGF-β1 inhibits the migration and proliferation of smooth muscle cells in aneurysms

Xiaowei Liu1, Cheng Xu2, Jiangjie Lou1

  • 1Department of Cardiology, Zhejiang Hospital, China.

Cytokine
|August 5, 2022
PubMed
Abstract

Insights

Platelet transforming growth factor-beta 1 (TGF-β1) inhibits angiotensin II (Ang II)-induced vascular smooth muscle cell dysfunction. This finding offers potential therapeutic insights for aortic injury by demonstrating TGF-β1

Area of Science:

  • Cardiovascular Biology
  • Vascular Cell Biology
  • Platelet Physiology

Background:

  • Excessive proliferation, migration, and invasion of murine aortic vascular smooth muscle cells (MASMCs) contribute to vascular disease.
  • Platelet-derived growth factors play a critical role in regulating vascular cell behavior.
  • Understanding the specific roles of platelet components, like TGF-β1, is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the inhibitory role of platelet-derived transforming growth factor-beta 1 (TGF-β1) on angiotensin II (Ang II)-induced MASMC dysfunction.
  • To explore the therapeutic potential of TGF-β1 in mitigating Ang II-induced vascular injury in vivo.
  • To elucidate the molecular mechanisms underlying TGF-β1's effects on MASMCs.

Main Methods:

  • MASMCs were treated with varying concentrations of Ang II and TGF-β1 to determine optimal intervention levels.
  • In vitro experiments assessed the effects of platelets, Ang II, and TGF-β1 on MASMC proliferation, migration, and invasion using cell-based assays and Western blotting.
  • An in vivo Ang II-induced mouse model was used to evaluate the therapeutic efficacy of TGF-β1, with mechanistic insights gained from inhibitor studies and pathological analysis.

Main Results:

  • Ang II significantly promoted MASMC proliferation, migration, and invasion by modulating related signaling pathways.
  • Exogenous TGF-β1 and platelet treatment effectively reversed the pro-proliferative, migratory, and invasive effects of Ang II on MASMCs.
  • In vivo, TGF-β1 administration demonstrated a protective effect against Ang II-induced abdominal aortic injury in mice, consistent with in vitro findings.

Conclusions:

  • Platelet-derived TGF-β1 acts as a key inhibitor of Ang II-induced MASMC proliferation, migration, and invasion.
  • TGF-β1 holds therapeutic promise for treating vascular pathologies driven by Ang II signaling.
  • The study highlights the critical role of platelet components in vascular homeostasis and disease modulation.
Keywords:
Abdominal aortic aneurysmAngiotensin IIMouse aortic vascular smooth muscle cellsPlateletsTGF-β1

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