16 citations
,
January 2002 in “Dermatology” Early baldness is noticed due to both reduced hair density and thinner hair shafts.
May 2026 in “Frontiers in Pharmacology” Dendrobium officinale polysaccharide helps hair regrowth in hair loss mice by affecting local steroid metabolism and hair follicle responses.
January 1999 in “Hair transplant forum international” The expected density of a hair transplant depends on the number of hair follicles transplanted and the thickness of the hair.
September 2017 in “Journal of Investigative Dermatology” Hair follicle cells change their DNA packaging during growth cycles and when grown in the lab.
May 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” Cannabidivarin (CBDV) helps new brain cells grow and develop in a specific brain area through a certain receptor.
9 citations
,
March 2017 in “Dermatologic Surgery” Asian men with hair loss have different follicular densities: East/Southeast 61.1, South 63.5, West 63.6 FU/cm².
15 citations
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December 2015 in “PLoS ONE” Fibroblasts can be mistaken for neural cells, so functional validation is needed.
28 citations
,
March 2010 in “Histochemistry and Cell Biology” Different markers are found in stem cells of the scalp's hair follicle bulge and the surrounding skin.
31 citations
,
September 2016 in “PLoS ONE” Cell division orientation varies by body site and is linked to epidermal thickness and cell density.
April 2019 in “The journal of investigative dermatology/Journal of investigative dermatology” Spiny mice regenerate skin better than laboratory mice due to larger hair bulges, more stem cells, and different collagen ratios.
323 citations
,
November 1984 in “Journal of Investigative Dermatology” September 2019 in “Journal of Investigative Dermatology” IL-17 and certain immune cells are linked to more severe alopecia areata.
41 citations
,
April 2009 in “Journal of comparative neurology” P2X3-IR fibers are widespread in rat skin and likely help detect pain.
October 2021 in “QJM: An International Journal of Medicine” ADSC injections improve hair density, thickness, and reduce inflammation in female pattern hair loss.
8 citations
,
April 2017 in “Journal of The Royal Society Interface” Giant axonal neuropathy changes the structure of keratin in human hair.
5 citations
,
August 2011 in “Journal of Dermatological Science” Dentin sialoprotein and phosphophoryn are present in rodent hair follicles and may help hair growth and development.
1 citations
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January 2004 in “Adelaide Research & Scholarship (AR&S) (University of Adelaide)” SPARC likely aids in tissue remodeling during the hair cycle, not in starting new hair growth phases.
125 citations
,
September 2001 in “The FASEB Journal” Stress can cause hair loss by negatively affecting hair follicles and this effect might be reversed with specific treatments.
November 2024 in “Journal of Investigative Dermatology”
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” T cells with memory features grow in number and gather around hair follicles when there are not enough immune cells.
April 2023 in “Journal of clinical and translational science”
April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” The study suggests that a specific type of immune cell, memory-like NK cells, may increase during active hair loss in Alopecia areata.
41 citations
,
June 2010 in “Journal of Investigative Dermatology” New cells are added to the hair's dermal papilla during the active growth phase.
2 citations
,
April 2021 in “International Journal of Molecular Sciences” The study concluded that changing the culture conditions can cause sika deer skin cells to switch from a flat to a 3D pattern, which is important for creating hair follicles.
15 citations
,
May 2003 in “The Laryngoscope” FGF-1 causes spiral ganglion neurites to branch more.
February 2026 in “PubMed” PRP-based treatments can increase hair density, but results vary among individuals.
April 2023 in “Journal of Investigative Dermatology” Psoriasis patients did not show more brain atrophy or small vessel disease than controls, but longer psoriasis duration was linked to more brain atrophy.
7 citations
,
October 1992 in “PubMed” Sinus hair follicles in mammals have different nerve fiber types with species-specific patterns, especially in cats.
January 2013 in “프로그램북(구 초록집)” Adipose stem cell-conditioned media improved hair density and thickness in women with hair loss.
76 citations
,
March 2005 in “Journal of Molecular Medicine” Certain mice without specific receptors or mast cells don't lose hair from stress.