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[Effect of synthesized polypeptide (P16) on inhibiting cell transdifferentiation and fibrosis induced by connective

Wei Wang1, Yu-jun Shi, Li Zhang

  • 1Key Laboratory of Transplant Engineering and Immunology, Ministry Of Health, West China Hospital, Sichuan University, Chengdu 610041, China.

Sichuan Da Xue Xue Bao. Yi Xue Ban = Journal of Sichuan University. Medical Science Edition
|August 28, 2007
PubMed
Abstract

Insights

A novel peptide, P16, binds strongly to rat kidney cells and inhibits connective tissue growth factor (CTGF)-induced fibrosis. This peptide shows potential for developing new antifibrosis therapies targeting CTGF receptors.

Area of Science:

  • Cell Biology
  • Biochemistry
  • Renal Physiology

Background:

  • Connective tissue growth factor (CTGF) plays a key role in promoting cell transdifferentiation and fibrosis.
  • Integrin αvβ3 is a known receptor for CTGF on rat tubular epithelial cells (NRK-52E).
  • Developing targeted therapies to inhibit CTGF-mediated fibrosis is a significant clinical need.

Purpose of the Study:

  • To investigate a synthetic peptide (P16) derived from CTGF for its ability to compete with CTGF binding to integrin αvβ3.
  • To evaluate the potential of P16 to inhibit CTGF-induced transdifferentiation and fibrosis in NRK-52E cells.
  • To explore P16 as a potential therapeutic agent for antifibrosis treatments.

Main Methods:

  • NRK-52E cells were cultured with CTGF, P16-FITC, or both.
  • Immunofluorescence staining and RT-PCR were used to assess the expression of α-SMA and collagen I/IV.
  • Cellular binding affinity of P16 and CTGF to NRK-52E cells was compared.

Main Results:

  • P16 demonstrated a higher affinity for NRK-52E cells compared to CTGF.
  • Co-culture with P16 significantly inhibited the upregulation of α-SMA, collagen I, and collagen IV induced by CTGF.
  • P16 alone did not induce cell transdifferentiation or fibrosis.

Conclusions:

  • The synthetic peptide P16 effectively binds to NRK-52E cells and inhibits CTGF-induced transdifferentiation and fibrosis in vitro.
  • P16 shows promise as a therapeutic candidate for antifibrosis by targeting the CTGF receptor pathway.
  • This study provides a foundation for developing novel antifibrosis therapies based on CTGF antagonism.

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