Transcriptome Analysis Identifies Tumor Immune Microenvironment Signaling Networks Supporting Metastatic...

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Prostate cancer (PCa) is a leading cause of cancer death in men.
• Metastatic castration-resistant prostate cancer (mCRPC) is the most lethal form, with bone metastasis being a critical factor.
• The molecular mechanisms driving mCRPC bone metastasis are not fully understood.

Purpose of the Study:

• To identify gene expression patterns and molecular mechanisms associated with mCRPC bone metastasis.
• To pinpoint key genes and biological pathways involved in the progression of mCRPC to bone.

Main Methods:

• RNA sequencing data from 60 mCRPC patients were analyzed.
• Weighted Gene Co-expression Network Analysis (WGCNA) was employed to identify gene modules correlated with bone metastasis.
• Upstream regulator analysis, Gene Ontology (GO), and KEGG enrichment analyses were performed.

Main Results:

• A specific gene cluster, the cyan module (M14), showed a strong positive correlation with mCRPC bone metastasis (r=0.81, p=4x10^-15).
• This module was significantly associated with parathyroid hormone synthesis, secretion, and action, and protein digestion and absorption pathways.
• Ten hub genes, including ALPL, PHEX, RUNX2, and collagen genes (COL11A1, COL24A1, COL22A1, COL13A1), were identified as critical players.

Conclusions:

• The study identified key molecular pathways and genes, particularly within the cyan module, that are significantly associated with bone metastasis in mCRPC.
• These findings provide novel insights into the pathogenesis of mCRPC bone metastasis and suggest potential therapeutic targets.