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Updated: Aug 5, 2026

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

c-Kit-mediated overlapping and unique functional and biochemical outcomes via diverse signaling pathways

Li Hong1, Veerendra Munugalavadla, Reuben Kapur

  • 1Department of Pediatrics, Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.

Molecular and Cellular Biology
|January 20, 2004
PubMed

Insights

Src family kinases (SFKs) uniquely regulate cell growth and survival through the c-Kit receptor. Restoring SFK binding sites rescued cell migration and survival, partially restoring proliferation via specific signaling pathways.

Area of Science:

  • Cellular Biology
  • Molecular Signaling
  • Receptor Tyrosine Kinases

Background:

  • Understanding receptor tyrosine kinase (RTK) signaling is crucial for deciphering cellular functions.
  • Diverse signaling pathways contribute to cellular growth, survival, and migration.
  • The specific roles of individual pathways in RTK signaling remain incompletely understood.

Purpose of the Study:

  • To investigate the individual contributions of signaling pathways downstream of the c-Kit receptor.
  • To elucidate the role of Src family kinases (SFKs) in c-Kit mediated cellular processes.

Main Methods:

  • Generated a functionally inert c-Kit receptor lacking binding sites for seven key signaling pathways.
  • Restored specific binding sites (SFK, PI-3 kinase, Grb2, Grb7, PLC-gamma) to the mutated c-Kit receptor.
  • Assessed the impact of restored binding sites on cellular proliferation, survival, migration, and downstream signaling pathway activation (Ras/MAPK, Rac/JNK, PI-3K/Akt).

Main Results:

  • Restoring SFK binding sites partially rescued proliferation and fully restored cell survival and migration, activating Ras/MAPK, Rac/JNK, and PI-3K/Akt pathways.
  • Restoring only the PI-3 kinase binding site did not affect proliferation but modestly improved survival and migration, despite full PI-3K/Akt pathway rescue.
  • Restoring binding sites for Grb2, Grb7, or phospholipase C-gamma had no discernible effect on cellular functions or signaling pathways.

Conclusions:

  • SFKs play a pivotal and unique role in controlling multiple cellular functions via the c-Kit receptor.
  • SFKs are critical for activating distinct downstream biochemical pathways essential for cell growth, survival, and migration.
  • The findings highlight SFKs as key regulators in RTK signaling networks.

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