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Updated: Nov 27, 2025

Analysis of the c-KIT Ligand Promoter Using Chromatin Immunoprecipitation
09:40

Analysis of the c-KIT Ligand Promoter Using Chromatin Immunoprecipitation

Published on: June 27, 2017

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Protein 4.1R negatively regulates P815 cells proliferation by inhibiting C-Kit-mediated signal transduction

Cong Ding1, Yuying Guo2, Taotao Liang1

  • 1School of Life Sciences, Zhengzhou University, 100 Science Road, Zhengzhou, 450001, PR China.

Experimental Cell Research
|December 3, 2020
PubMed

Insights

Protein 4.1R acts as a novel negative regulator, inhibiting mast cell (MC) proliferation by blocking C-Kit signaling. This discovery offers a potential therapeutic target for diseases linked to abnormal MC growth.

Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • Mast cells (MCs) are critical in physiological and pathological processes.
  • C-Kit signaling is a key driver of MC proliferation, but its regulation needs further study.
  • Protein 4.1R previously shown to regulate T cell receptor (TCR) signaling.

Purpose of the Study:

  • To investigate the role of protein 4.1R in C-Kit-mediated mast cell proliferation.
  • To explore protein 4.1R as a potential therapeutic target for mast cell-related diseases.

Main Methods:

  • CRISPR/Cas9 technology used to create P815-4.1R knockout cells.
  • Assessed MC proliferation, cell cycle progression, and systemic mastocytosis (SM) mouse models.
  • Investigated protein 4.1R interaction with C-Kit and downstream signaling pathways (Ras-Raf-MAPKs, PI3K-AKT).

Main Results:

  • Loss of 4.1R significantly enhanced P815 cell proliferation and accelerated cell cycle.
  • Protein 4.1R alleviated clinical symptoms and improved survival in SM mice.
  • 4.1R directly interacts with C-Kit, inhibiting Ras-Raf-MAPKs and PI3K-AKT signaling.

Conclusions:

  • Protein 4.1R is a novel negative regulator of mast cell proliferation.
  • 4.1R inhibits MC proliferation by suppressing C-Kit-mediated signal transduction.
  • Protein 4.1R represents a potential therapeutic target for abnormal MC proliferation diseases.
Keywords:
4.1RC-KitCell proliferationP815 cellsSignal transduction

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