Progenitor Cell Dynamics in Androgenetic Alopecia: Insights from Spatially Resolved Transcriptomics

Area of Science:

• Dermatology
• Molecular Biology
• Genetics

Background:

• Androgenetic alopecia (AGA) is characterized by progressive hair follicle miniaturization and thinning.
• The depletion of hair follicle progenitor cells is a key factor in AGA, but the underlying mechanisms are not fully understood.

Purpose of the Study:

• To investigate transcriptional alterations in hair follicle progenitor cell regions of AGA patients using spatial transcriptomics.
• To compare these alterations with healthy controls to identify molecular changes driving AGA.

Main Methods:

• Utilized GeoMX Digital Spatial Profiling (DSP) to analyze transcriptional changes in specific hair follicle regions.
• Correlated gene expression data with protein expression levels in affected tissues.

Main Results:

• Identified significant upregulation of extracellular matrix (ECM) organization and epithelial-mesenchymal transition (EMT) genes (e.g., FN1, TWIST1, TGFB2) in AGA progenitor cells.
• Confirmed increased protein levels for these genes, indicating a fibrogenic shift and potential EMT.
• Observed that peri-infundibular immune cell infiltration influences these molecular changes, suggesting a role for microinflammation.

Conclusions:

• Spatial transcriptomics is effective for identifying molecular mechanisms in AGA while preserving tissue context.
• EMT and fibrogenic shifts in the hair follicle microenvironment contribute to progenitor cell loss in AGA.
• Immune-mediated microinflammation may exacerbate progenitor cell depletion and fibrogenesis in AGA, highlighting potential therapeutic targets.