P38γ Promotes Tumorigenesis Through Activating Immune Evasion
Naveenkumar Chandrashekar1, Xiao-Mei Qi1, Guan Chen1,2
1Department of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA.
Cells
|July 13, 2026
Summary
Stress-activated protein kinase p38γ (MAPK12) promotes tumorigenesis by reprogramming immune evasion in breast, pancreatic, and colon cancers. Targeting p38γ may offer a novel cancer therapy approach.
Area of Science:
- Oncology
- Molecular Biology
- Immunology
Background:
- Stress-activated protein kinase p38γ (MAPK12) is implicated in tumorigenesis, but its mechanisms are unclear.
- p38γ plays a role in immune evasion across multiple cancer types.
Purpose of the Study:
- To review and present evidence on the role of p38γ in promoting tumorigenesis through immune evasion in breast, pancreatic, and colon cancers.
- To elucidate the mechanisms by which p38γ integrates oncogenic and inflammatory signals.
Main Methods:
- Review of published and unpublished studies.
- Analysis of murine models for breast, pancreatic (KPC and KTC), and colon cancer.
- Investigation of signaling pathways including Wnt, CXCL5, CXCL13, and PD-L1 expression.
Main Results:
- p38γ acts as an oncogene in triple-negative breast cancer (TNBC) and promotes breast tumorigenesis.
- p38γ is essential for KRAS-oncogene-induced pancreatic cancer, supporting cell metabolism and fibrosis.
- p38γ integrates colon cancer risk factors, amplifying oncogenic signaling via Wnt pathway and immune evasion (PD-L1).
Conclusions:
- p38γ MAPK is a key integrator of oncogenic and inflammatory signals in multiple cancers.
- p38γ promotes tumorigenesis by activating proliferative signaling and immune evasion.
- Targeting p38γ represents a potential innovative strategy for cancer therapy.
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