AMPK attenuates SHH subgroup medulloblastoma growth and metastasis by inhibiting NF-κB activation

Area of Science:

• Oncology
• Molecular Biology
• Cancer Metastasis Research

Background:

• Medulloblastoma (MB) is a common pediatric brain tumor.
• Metastasis and relapse are primary causes of mortality in MB patients.
• Sonic Hedgehog (Shh) pathway activation drives SHH-MB initiation, but metastatic mechanisms remain unclear.

Purpose of the Study:

• To investigate the role of AMP-dependent protein kinase (AMPK) in SHH-MB metastasis.
• To elucidate the signaling pathways regulated by AMPK in SHH-MB.
• To evaluate the therapeutic potential of targeting AMPK and associated pathways.

Main Methods:

• Investigated AMPK's effect on Shh and NF-κB signaling in SHH-MB cells.
• Utilized pharmacological inhibitors (Vismodegib, TPCA-1) targeting Shh and NF-κB pathways.
• Assessed the impact of AMPK modulation and pathway blockade on SHH-MB cell proliferation, migration, and invasion.

Main Results:

• AMPK restrains SHH-MB cell proliferation by inhibiting the Shh signaling pathway.
• AMPK impedes SHH-MB growth and metastasis through regulation of the NF-κB signaling pathway.
• Combined inhibition of Shh (Vismodegib) and NF-κB (TPCA-1) pathways synergistically suppressed SHH-MB cell growth, migration, and invasion.

Conclusions:

• AMPK regulates SHH-MB progression via the SHH-GLI1 and NF-κB signaling axes.
• The AMPK-NF-κB axis represents a potential therapeutic target for SHH-MB.
• Combination therapy blocking both NF-κB and Shh pathways demonstrates synergistic efficacy in SHH-MB treatment.