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MAPKs and signal transduction in the control of gastrointestinal epithelial cell proliferation and differentiation

Luciana H Osaki1, Patrícia Gama

  • 1Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, SP 05508-000, Brazil. patgama@usp.br.

International Journal of Molecular Sciences
|May 15, 2013
PubMed

Insights

Mitogen-activated protein kinase (MAPK) pathways regulate cell fate and are crucial for gastrointestinal epithelia. This review explores MAPK interactions, their role in cell proliferation and differentiation, and nutritional influences.

Area of Science:

  • Cellular signaling and molecular biology.
  • Gastrointestinal physiology and epithelial biology.

Background:

  • Mitogen-activated protein kinase (MAPK) pathways are essential signal transducers, controlling cellular responses like proliferation, differentiation, migration, and apoptosis.
  • MAPK cascades form complex networks, interacting with other signaling pathways to determine cell fate.

Purpose of the Study:

  • To review the major MAPK pathways (ERK, JNK, p38, ERK5) and their crosstalk with PI3K-Akt, TGFβ/Smad, and Wnt/β-catenin signaling.
  • To elucidate the role of MAPKs in regulating cell proliferation and differentiation within the gastrointestinal tract's rapidly renewing epithelia.
  • To highlight recent findings on how nutritional factors impact MAPK signaling cascades.

Main Methods:

  • Literature review focusing on MAPK signaling.
  • Analysis of interactions between MAPK pathways and other key signaling networks.
  • Examination of MAPK roles in gastrointestinal epithelial cell dynamics.
  • Synthesis of current research on nutritional modulation of MAPK pathways.

Main Results:

  • MAPK pathways, including ERK, JNK, p38, and ERK5, are central regulators of cellular processes.
  • Significant crosstalk exists between MAPK pathways and other crucial signaling networks like PI3K-Akt, TGFβ/Smad, and Wnt/β-catenin.
  • MAPKs play a critical role in controlling cell proliferation and differentiation in the gastrointestinal epithelia.
  • Nutritional factors have emerged as significant modulators of MAPK signal transduction.

Conclusions:

  • MAPK pathways are integral to cellular signaling networks governing cell fate, particularly in the dynamic environment of the gastrointestinal tract.
  • Understanding MAPK interactions and regulation is key to comprehending gastrointestinal epithelial homeostasis.
  • Nutritional interventions targeting MAPK pathways represent a promising area for future research in gastrointestinal health.

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