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.
745 citations,
February 1992 in “Trends in genetics” Hair follicles create different cell layers and proteins, controlled by various molecules.
286 citations,
August 2007 in “Journal of Clinical Investigation” Alopecia areata is an autoimmune disease where T cells attack hair follicles.
263 citations,
February 2011 in “Journal of Controlled Release” Medium-sized particles penetrate hair follicles better than smaller or larger ones, which could improve delivery of skin treatments.
253 citations,
December 2007 in “Journal of Investigative Dermatology” Hair follicles prevent NK cell attacks to avoid hair loss.
236 citations,
July 2001 in “Trends in Molecular Medicine” Future hair loss treatments should aim to extend hair growth, reactivate resting follicles, reverse shrinkage, and possibly create new follicles, with gene therapy showing promise.
218 citations,
January 2013 in “The Lancet Oncology” Chemotherapy causes hair loss by damaging hair follicles and stem cells, with more research needed for prevention and treatment.
214 citations,
April 2017 in “Cell” Different small areas within hair follicles send specific signals that control what type of cells stem cells become.
211 citations,
April 2013 in “Development” More dermal papilla cells in hair follicles lead to larger, healthier hair, while fewer cells cause hair thinning and loss.
211 citations,
February 2009 in “European journal of pharmaceutics and biopharmaceutics” Hair follicles help absorb and store topical compounds, aiding targeted drug delivery.
185 citations,
August 2005 in “Autoimmunity Reviews” Alopecia areata is an autoimmune condition causing hair loss due to the immune system attacking hair follicles, often influenced by genetics and stress.
181 citations,
July 2004 in “Journal of controlled release” Smaller nanoparticles improve minoxidil absorption through hair follicles.
156 citations,
October 2012 in “Seminars in Cell & Developmental Biology” Different types of stem cells in hair follicles play unique roles in wound healing and hair growth, with some stem cells not originating from existing hair follicles but from non-hair follicle cells. WNT signaling and the Lhx2 factor are key in creating new hair follicles.
155 citations,
May 2016 in “Nature communications” Memory T cells in the skin balance staying put and moving into the blood, clustering around hair follicles, and increasing in number after infection.
141 citations,
November 2005 in “International journal of pharmaceutics” Hair follicles may soon be used more for targeted and systemic drug delivery.
134 citations,
July 2020 in “Experimental dermatology” Hair follicles are normally protected from the immune system, but when this protection fails, it can cause hair loss in alopecia areata.
130 citations,
June 2003 in “Journal of Investigative Dermatology Symposium Proceedings” Estrogen Receptor ß (ERß) is the main hormone controller in human skin and hair follicles, not Estrogen Receptor α (ERα) or the Androgen Receptor (AR).
122 citations,
April 2011 in “European Journal of Pharmaceutics and Biopharmaceutics” Particles around 100 nm can penetrate and stay in hair follicles without passing through healthy skin, making them safe for use in topical products and useful for targeted drug delivery.
122 citations,
July 2005 in “The FASEB journal” Hair follicles produce and respond to melatonin, affecting hair growth and sensitivity to estrogen.
116 citations,
September 2001 in “Journal of The American Academy of Dermatology” Hair loss occurs due to fewer papillary cells, smaller follicles, and shorter growth phases.
116 citations,
April 1986 in “The journal of cell biology/The Journal of cell biology” Trichohyalin is a protein in hair follicles that helps form hair filaments.
112 citations,
July 1998 in “Journal of Investigative Dermatology” Ruby laser pulses best destroy hair follicles during the growth phase and effectiveness varies with laser intensity; melanin is key for targeting, and timing treatments can improve results.
109 citations,
November 2005 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” Targeting hair follicles can improve skin treatments and reduce side effects.
106 citations,
January 2013 in “Clinical and Developmental Immunology” Alopecia areata is caused by immune system attacks on hair follicles, often triggered by viral infections.
106 citations,
September 2010 in “Stem cells” Skin-derived precursors in hair follicles come from different origins but function similarly.
99 citations,
September 2007 in “The American journal of pathology” Chemotherapy damages hair follicles, causing hair loss and other cellular changes.
99 citations,
April 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair follicles help skin immune recovery after UVB exposure.
98 citations,
July 2014 in “Trends in Molecular Medicine” Hair follicles are hormone-sensitive and involved in growth and other functions, with potential for new treatments, but more research is needed.
95 citations,
July 2015 in “European journal of pharmaceutics and biopharmaceutics” Lipid nanoparticles can help deliver drugs through hair follicles but struggle to penetrate deeper skin layers.
94 citations,
July 2003 in “Journal of biological chemistry/The Journal of biological chemistry” EGF controls hair growth by regulating hair follicles' growth phases.