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Piezo1-A Key Pathogenic Factor in Breast Implant-Associated Capsular Contracture.

Jia-Ming Sun1, Yu-Xin Liu1, Dan-Ning Zheng1

  • 1Department of Plastic & Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University, School of Medicine, No. 639, Zhi Zao Ju Road, Shanghai, 200011, People's Republic of China.

Aesthetic Plastic Surgery
|January 20, 2026
PubMed
Summary

The mechanosensitive ion channel Piezo1 is upregulated in breast implant capsular contracture. Inhibiting Piezo1 with GsMTx4 reduced fibrosis, suggesting it as a novel therapeutic target for this complication.

Keywords:
Capsular contractureGsMTx4LTAPiezo1Prevention

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Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Surgical Complications

Background:

  • Capsular contracture (CC) is a common complication after breast implant surgery with unclear mechanisms.
  • The role of the mechanosensitive ion channel Piezo1 in breast implant-associated fibrosis was previously unknown.

Purpose of the Study:

  • To investigate Piezo1 expression in breast implant-associated capsular contracture.
  • To determine the functional role of Piezo1 in the pathogenesis of CC.
  • To evaluate Piezo1 as a potential therapeutic target for CC.

Main Methods:

  • Utilized a murine silicone-implanted model to analyze Piezo1 expression during capsule formation.
  • Examined Piezo1 expression in human capsular tissues (normal and contracted).
  • Employed a lipoteichoic acid (LTA)-induced contracture model to test the Piezo1 inhibitor GsMTx4, using histology, immunofluorescence, and Western blot.

Main Results:

  • Piezo1 expression significantly increased during early capsule formation in mice, correlating with collagen deposition and capsular thickening.
  • Human contracted capsules showed markedly higher Piezo1 levels than normal capsules.
  • GsMTx4 treatment substantially reduced collagen deposition, capsular thickness, and Piezo1 levels in the LTA-induced contracture model.

Conclusions:

  • Piezo1 is a critical mediator in the pathogenesis of breast implant-associated capsular contracture.
  • The dynamic expression of Piezo1 and the efficacy of its inhibition highlight its role in fibrotic processes.
  • Piezo1 inhibition presents a promising novel therapeutic strategy for preventing capsular contracture.