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Hair follicle dermal papilla cell (DPC)
- Target
- DPC
- Molecular classification
- Other (specialized mesenchymal cell), not an enzyme, receptor, transporter, or transcription factor
01
Overview
Hair follicle dermal papilla cells are a specialized population of mesenchymal cells located at the base of the hair follicle, essential for hair follicle formation, regeneration, and cycling. They orchestrate the growth and cycling of hair by exchanging molecular signals with surrounding epithelial cells, regulate follicle size and hair growth phase, and are critically involved in hair loss conditions such as androgenetic alopecia, where androgen signaling through the DPCs triggers follicle miniaturization. DPCs are a focus of regenerative medicine for hair restoration, but they are not in themselves "drug targets"; rather, they act as instructive niches for the epithelial stem cells that produce the hair shaft
- Other names
- Dermal papilla cellDP cellhair follicle DP cellfollicular dermal papilla cell
02
Mechanism of action
5-alpha-reductase inhibition (decreases DHT, reducing androgen signaling in DPCs); Arteriolar vasodilation and growth factor release (may induce DPC proliferation/activity); Modulation of Wnt/β-catenin, FGF, BMP, and other signaling pathways relevant to DPC function and hair growth
03
Biological functions
Hair follicle morphogenesisRegulation of hair growth cycle (anagen, catagen, telogen phases)Induction and maintenance of hair follicle stem cell activitySecretion of growth factors and cell signaling molecules
04
Disease associations
Androgenetic alopecia (pattern hair loss)Other forms of hair loss (alopecia)Aging-related hair thinning
05
Safety considerations
None specific to targeting DPCs directly, as current therapeutics act systemically or topically and primarily influence hormonal or growth factor signalingChallenge: Effective delivery or targeting of DPCs in vivo; off-target effects possible with agents modulating major signaling pathways
06
Interacting drugs
Finasteride (indirectly, via 5-alpha-reductase inhibition, decreases DHT levels impacting the cellular signaling within DPCs in androgenetic alopecia)
2 more in the full profile.
07
Biomarkers
Expression of DP-specific markers: alkaline phosphatase, versican, SOX2 (in murine DPCs), CD133 in human DPCs
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