TLDR Nestin identifies specific progenitor cells in hair follicles that can become outer root sheath cells.
This study investigated the role of nestin, an intermediate filament protein, in hair follicle (HF) development and differentiation. The researchers used genetically modified mice to trace nestin-expressing cells during HF morphogenesis and in adult HFs. They discovered that nestin-expressing cells appear in the epithelial layer of embryonic HFs at the peg stage and express keratin 14 (K14) and K5, but not other markers like vimentin or SOX2. In adult HFs, nestin-expressing cells were not marked by K15, which is associated with multipotent stem cells. However, after inducing hair growth by depilation, most outer root sheath (ORS) keratinocytes in the new anagen HFs were derived from nestin-expressing cells. The study concludes that nestin marks unipotent progenitor cells in both embryonic and adult HFs that are capable of differentiating into ORS keratinocytes.
173 citations,
August 2015 in “Developmental cell” The study identified unique genes in hair follicle cells and their environment, suggesting these genes help organize cells for hair growth.
65 citations,
November 2012 in “Tissue Engineering Part B-reviews” Hair follicle stem cells are a promising source for tissue repair and treating skin or hair diseases.
63 citations,
November 2012 in “Journal of Cellular Biochemistry” Runx1 affects hair growth, cancer development, and autoimmune diseases in epithelial tissues.
759 citations,
February 2009 in “Current Biology” Hair follicles are complex, dynamic mini-organs that help us understand cell growth, death, migration, and differentiation, as well as tissue regeneration and tumor biology.
72 citations,
June 2001 in “Journal of Investigative Dermatology” S100A4 and S100A6 proteins may activate stem cells for hair follicle regeneration and could be potential targets for hair loss treatments.
23 citations,
December 2020 in “Frontiers in Cell and Developmental Biology” Gene network oscillations inside hair stem cells are key for hair growth regulation and could help treat hair loss.
170 citations,
November 2007 in “The journal of investigative dermatology/Journal of investigative dermatology” Skin can heal wounds without hair follicle stem cells, but it takes a bit longer.
Dermal stem cells help regenerate hair follicles and heal skin wounds.
Skin stem cells are crucial for maintaining and repairing skin, with potential for treating skin disorders and improving wound healing.
6 citations,
January 2017 in “Advances in Experimental Medicine and Biology” Runx genes are important for stem cell regulation and their roles in aging and disease need more research.