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PAK4 signaling in health and disease: defining the PAK4-CREB axis

So-Yoon Won1, Jung-Jin Park1, Eun-Young Shin2

  • 1Department of Biochemistry, Chungbuk National University College of Medicine, Cheongju, 28644, Korea.

Experimental & Molecular Medicine
|February 14, 2019
PubMed

Insights

p21-Activated kinase 4 (PAK4) regulates cell functions and is implicated in cancer and neuroprotection. The novel PAK4-CREB axis influences gene expression, impacting diseases like prostate cancer and Parkinson's.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Oncology

Background:

  • p21-Activated kinase 4 (PAK4) is a key regulator of cellular processes like migration, proliferation, and survival.
  • Dysregulated PAK4 activity is linked to cancer progression, including epithelial-mesenchymal transition, invasion, and metastasis.
  • PAK4 also plays a crucial role in embryonic brain development and exhibits neuroprotective functions.

Purpose of the Study:

  • To review PAK4 signaling pathways in prostate cancer, Parkinson's disease, and melanogenesis.
  • To highlight the emerging role of the transcription factor CREB as a novel effector of PAK4.
  • To emphasize the implications of the PAK4-CREB axis in various pathological conditions.

Main Methods:

  • Literature review of studies on PAK4 signaling.
  • Analysis of PAK4's role in cancer progression and neurodegenerative diseases.
  • Focus on the recently identified PAK4-CREB interaction and its downstream effects.

Main Results:

  • PAK4 is a significant factor in cancer metastasis and a target for anticancer drug development, though current inhibitors face challenges.
  • PAK4 is essential for brain development and offers neuroprotection.
  • The transcription factor CREB is identified as a novel effector of PAK4, influencing a broad range of genes.

Conclusions:

  • The PAK4-CREB axis represents a critical signaling pathway with implications for prostate cancer, Parkinson's disease, and melanogenesis.
  • Understanding this axis provides new insights into disease mechanisms and potential therapeutic strategies.
  • Further research into PAK4 effectors and their roles in disease is warranted.

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