Microenvironmental Reprogramming of Human Dermal Papilla Cells for Hair Follicle Tissue Engineering

This study addressed the challenge of restoring hair-inductive potential in human dermal papilla cells (hDPCs) for hair regeneration by developing an optimized 3-D co-culture system that mimicked the in-vivo microenvironment. The system involved Matrigel-encapsulated hDPCs forming aggregates (hDPAs) with enhanced activity, proliferation, and reduced apoptosis and hypoxia compared to traditional cultures. Co-culturing with hair matrix cells and dermal sheath cup cells further improved the expression of hair regeneration-related genes and mature hair follicle induction. The study found that this biomimetic microenvironment stimulated the Wnt signaling pathway and inhibited the BMP pathway, suggesting that this co-culture system could serve as a reliable platform for high-throughput culture and testing of hDPAs for hair follicle tissue engineering.