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Glossary Dermal Papillae

small skin projections crucial for hair growth and nutrient supply

Dermal papillae are small, nipple-like extensions of the dermis (the inner layer of the skin) that project into the epidermis (the outer layer of the skin). In the context of hair, they are located at the base of hair follicles and play a crucial role in hair growth by supplying nutrients and signaling molecules to the hair matrix cells, which are responsible for producing hair.

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Research

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research Sox2-positive dermal papilla cells specify hair follicle type in mammalian epidermis

338 citations , July 2009 in “Development”

This study demonstrates that Sox2-positive dermal papilla cells specify particular hair follicle types by showing heterogeneity in gene expression and pathway activation in these cells.

Effects of Epidermal Growth Factor, Fibroblast Growth Factor, Minoxidil, and Hydrocortisone on Growth Kinetics in Human Hair Bulb Papilla Cells and Root Sheath Fibroblasts Cultured In Vitro

research Effects of epidermal growth factor, fibroblast growth factor, minoxidil and hydrocortisone on growth kinetics in human hair bulb papilla cells and root sheath fibroblasts cultured in vitro

58 citations , June 1987 in “Archives of Dermatological Research”

This study found that epidermal and fibroblast growth factors increased proliferation of human hair bulb papilla cells and root sheath fibroblasts in vitro, while hydrocortisone decreased it and minoxidil had no effect.

Sphere Formation Increases the Ability of Cultured Human Dermal Papilla Cells to Induce Hair Follicles from Mouse Epidermal Cells in a Reconstitution Assay

research Sphere Formation Increases the Ability of Cultured Human Dermal Papilla Cells to Induce Hair Follicles from Mouse Epidermal Cells in a Reconstitution Assay

75 citations , August 2011 in “Journal of Investigative Dermatology”

This study found that cultured human dermal papilla cells formed into three-dimensional spheres have an increased ability to induce hair follicles from mouse epidermal cells compared to two-dimensional cultures.

research Epidermal growth factor promotes proliferation of dermal papilla cells via Notch signaling pathway

36 citations , April 2016 in “Biochimie”

This study shows that the concentration of epidermal growth factor (EGF) is crucial for determining whether mink hair follicles are promoted or inhibited in vitro, with involvement of the Notch signaling pathway in DP cell proliferation.

research Preliminary studies of hair follicle regeneration by injections of epidermal stem cells and dermal papilla cells into nude mice

5 citations , March 2020 in “Cell and Tissue Banking”

This study found that injecting a mixture of epidermal stem cells and dermal papilla cells can induce hair follicle regeneration and well-ordered epidermis formation in mice.

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learn Epidermal Growth Factor

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signaling protein that, when suppressed, may grow hair by reducing inflammation and stem cell loss

learn Thymosin Beta 4

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Community Join

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community Everything you ever wanted to know about Pelage Pharma's PP405: how it works and what to expect

126 upvotes 2 months ago

PP405 may encourage earlier hair growth and slightly increase visible hair count but does not reverse hair follicle miniaturization in male pattern baldness. It does not address damage to the dermal papilla or broken Wnt signaling.

community Keratin microspheres - breakthrough

14 upvotes 2 years ago

A gel of keratin microspheres promotes hair follicle growth, showing similar effectiveness to minoxidil in mice. The treatment activates hair growth pathways and reduces inflammation, with potential applications in drug delivery for hair-related disorders.

community Someone please offer reassurance

in Minoxidil 3 upvotes 1 month ago

A 19-year-old male is experiencing hair shedding while using oral minoxidil, ketoconazole, dermastamping, and saw palmetto, and is considering switching to finasteride for better results. Users suggest that saw palmetto may not be effective and recommend finasteride instead, while also discussing other treatments like rosemary oil, peppermint oil, and pumpkin seed oil.

community A Theory on Why Microneedling Works

175 upvotes 6 years ago

Microneedling may enhance hair regrowth by transferring stem cells to dormant follicles, improving the effects of minoxidil. Users discuss using microneedling with needle lengths around 1.5mm to stimulate hair growth.

community My derm said they came up with a new serum that is better then fin? What’s y’all’s thoughts

7 months ago

A new serum claims to enhance hair regrowth by amplifying oxygen delivery, improving the effectiveness of treatments like exosomes and peptides. Users are skeptical, questioning its efficacy compared to established treatments like Minoxidil and Finasteride.

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