April 2019 in “Journal of Investigative Dermatology” Calcium signals and SHH guide the direction of feather growth in chicken skin.
October 2011 in “InTech eBooks” Menstrual cycles can be irregular for women of childbearing age.
4 citations
,
February 2008 in “Cell stem cell” NFATc1 is crucial for keeping hair follicle stem cells inactive.
68 citations
,
April 2012 in “Journal of Investigative Dermatology” The conclusion is that Fgf18 and Tgf-ß signaling could be targeted for hair loss treatments.
October 2025 in “Journal of Investigative Dermatology” Hair follicle dermal stem cells help control hair growth timing by regulating signals at the hair germ–dermal papilla interface.
November 2025 in “BMC Genomics” Melatonin helps control hair growth in cashmere goats, which could improve cashmere production.
73 citations
,
June 2001 in “Endocrinology” Prolactin affects when mice shed and grow hair.
42 citations
,
January 2014 in “Cold Spring Harbor Perspectives in Medicine” Hair growth is influenced by various body and external factors, and neighboring hairs communicate to synchronize regeneration.
1 citations
,
August 2023 in “Nature communications” Hdac1 and Hdac2 help maintain and protect the cells that control hair growth.
9 citations
,
February 2001 in “Journal of Dermatological Science” p21waf1/cip1 and p27kip1 help in hair follicle differentiation in rats.
September 2021 in “European Neuropsychopharmacology” The research explores how gut bacteria and sleep patterns are related in mental health disorders.
14 citations
,
June 2001 in “Endocrinology” Prolactin affects when mice shed and grow hair.
January 2016 in “eScholarship (California Digital Library)” HBCs in the olfactory epithelium can self-renew or differentiate into other cell types, with specific patterns during regeneration.
August 2013 in “eCommons (Cornell University)” Runx1 and CDK inhibitors help keep hair follicle stem cells inactive, affecting their future roles.
49 citations
,
May 2018 in “Endocrine” Women with regular menstrual cycles and PCOS have linked kisspeptin and LH hormone patterns, unlike those with irregular cycles.
1 citations
,
January 2022 in “Cell Biology International” Changing CDK4 levels affects the number of stem cells in mouse hair follicles.
189 citations
,
January 2014 in “Journal of Visualized Experiments” Hair cortisol analysis effectively measures long-term stress.
176 citations
,
January 2013 in “Proceedings of the National Academy of Sciences” BMP and Wnt signaling balance controls hair follicle stem cell activity and hair growth.
122 citations
,
October 2010 in “Clinica Chimica Acta” Washing hair with water or shampoo lowers cortisol levels in hair.
83 citations
,
February 1977 in “PubMed” Increasing light exposure in winter can make mares ovulate and cycle earlier.
69 citations
,
May 2016 in “General and Comparative Endocrinology” External factors can significantly affect hair cortisol levels, so it's not always a reliable stress marker.
50 citations
,
November 2020 in “Physiology & behavior” People with depression often have higher hair cortisol levels, while those with PTSD tend to have lower levels, but more research is needed to understand this fully.
32 citations
,
September 1996 in “Archives of Dermatological Research” 30 citations
,
July 2023 in “Clinical Chemistry and Laboratory Medicine (CCLM)” Cortisone in hair is a more reliable indicator of stress hormone exposure than cortisol.
23 citations
,
January 2016 in “Brazilian Journal of Psychiatry” First-episode psychosis patients have higher hair cortisol levels, indicating early stress response issues.
19 citations
,
June 2020 in “General and comparative endocrinology” Hair cortisol is a reliable stress indicator in cattle but may not be valid for pigs.
18 citations
,
March 2023 in “Molecular Therapy — Nucleic Acids” Mechanical stimuli and CCL2 can help regenerate hair follicles in adult mice.
14 citations
,
March 2021 in “Journal of Pediatric and Adolescent Gynecology” In teens with Polycystic Ovary Syndrome and obesity, issues related to metabolism, skin, and mental health are common, and a clinic with various specialists can provide care for most of these problems.
14 citations
,
December 2009 in “Der Hautarzt”
13 citations
,
November 2021 in “Frontiers in Immunology” Melatonin could be an effective treatment for Alzheimer's Disease and rosacea.