Large-Scale Plasma Proteomics and Genetic Integration Uncover Novel Biological Pathways in Male Pattern Baldness

Area of Science:

• Genetics and Molecular Biology
• Dermatology

Background:

• Male pattern baldness (MPB) is common but its molecular basis is poorly understood, hindering new treatments.
• Current therapies often focus on androgen signaling, limiting innovation.

Purpose of the Study:

• To identify and prioritize causal proteins and pathways implicated in male pattern baldness (MPB).
• To bridge the gap between genetic associations and biological function for therapeutic development.

Main Methods:

• Proteome-wide association study (PWAS) of 2911 plasma proteins in 24,069 UK Biobank participants.
• Pathway enrichment analysis, multi-omic integration, and transcriptome-wide association studies (TWAS).
• Validation using scalp biopsy transcriptomics and assessment of druggability and pleiotropy.

Main Results:

• Forty-seven proteins significantly associated with MPB severity, enriched in hair cycle and epidermis development pathways.
• Five candidate genes prioritized: CD38, FGF5, TACSTD2, DPEP1, PLB1.
• CD38 (upregulated) and TACSTD2, PLB1 (downregulated) showed differential expression in balding scalps; CD38 is a druggable target.

Conclusions:

• Elucidates the molecular architecture of MPB beyond androgen signaling.
• Identifies novel biological pathways and prioritizes non-hormonal targets like CD38 for hair loss therapies.
• Provides an evidence-based framework for developing new male pattern baldness treatments.