Dermal papilla cell-derived exosome

This entry describes the complex signaling network mediated by dermal papilla cell (DPC)-derived exosomes in the hair follicle microenvironment. These exosomes function as paracrine messengers, transporting a cargo of microRNAs and growth factors that regulate the activity of neighboring cells, such as hair matrix cells and outer root sheath cells (Hu et al., 2020, Bioactive Materials). Key signaling pathways involved in this process include the Wnt/β-catenin, Sonic Hedgehog (Shh), and Bone Morphogenetic Protein (BMP) pathways, which are critical for hair follicle morphogenesis and cycling (Zhou et al., 2018, Journal of Dermatological Science). Specifically, exosomal miRNAs like miR-218-5p have been shown to promote the transition from the telogen (resting) phase to the anagen (growth) phase by stabilizing β-catenin. In conditions such as androgenetic alopecia, the secretion and composition of these exosomes are often altered, contributing to the miniaturization of the hair follicle. Therapeutic approaches targeting these pathways involve the use of exogenous exosomes or the delivery of specific exosomal components to restore healthy signaling (Kwack et al., 2019, Journal of Investigative Dermatology). While not a single molecular target, this system represents a significant area of research in regenerative medicine for hair loss. Current challenges include the standardization of exosome isolation, characterization of the bioactive cargo, and ensuring long-term safety in clinical applications.

Other names

DPC-derived exosomeDPC-ExoMultiple intracellular and paracrine pathways in hair follicle cells via exosome-delivered RNAs and growth factors

Activation of Wnt/β-catenin and Shh signaling pathways via exosomal delivery of miRNAs and growth factors to stimulate hair follicle regeneration.