February 2025 in “Plastic and Aesthetic Research” In this study, after long-term observation of human scalp hair follicles over 16 years, the researchers found that a topical 5% minoxidil solution could stimulate hair regrowth after a period of dormancy, though with reduced growth rates and hair diameter.
20 citations
,
September 2004 in “Journal of Anatomy” This study suggests that the structure and function of the inner root sheath in mammalian hair may have evolved from simpler forms seen in monotremes, aiding in hair exit without damaging the epidermis.
January 2012 in “Journal of the Dermatology Nurses’ Association” The document explains hair growth, hair loss types, and other hair-related terms.
59 citations
,
August 1981 in “PubMed” This study describes trichilemmal keratinization as a distinct process of hair follicle keratinization that occurs in specific areas of the outer root sheath, illustrated using electron microscopy on dog hair.
26 citations
,
March 1986 in “Clinical and Experimental Dermatology” Scalp hair grows at 0.37 mm/day, forearm hair at 0.18 mm/day, and thigh hair at 0.30 mm/day, with no significant differences found in people with certain hair conditions.
23 citations
,
April 1999 in “Dermatologic Clinics” This study found that the Epilight multiple wavelength pulsed-intense light source was effective for long-lasting hair removal, particularly in individuals with dark hair and light skin.
16 citations
,
April 2021 in “Plant Signaling & Behavior” This study found that in Arabidopsis, the MYB30-EIN3 module plays a role in adapting root hair development to phosphate deficiency, potentially enhancing phosphate uptake from soil.
16 citations
,
July 2013 in “The American Journal of Dermatopathology” This study observed that pigmented casts are present in various alopecia types but are not specific to any single diagnosis, with distinct morphological features noted in trichotillomania.
4 citations
,
April 2016 in “Experimental Dermatology” This commentary discusses the mechanisms of progression and potential regrowth in androgenetic alopecia, indicating that the initiation of anagen in kenogen follicles is more critical for hair density improvement than reversing follicle miniaturization.
2 citations
,
June 1980 in “International Journal of Dermatology” This article on pediculosis lacks an abstract and does not report new research findings.
1 citations
,
July 2009 in “Journal of dermatology” This case report describes a 29-year-old Japanese man with follicular mucinosis, suggesting nestin-positive, multipotent hair follicle stem cells may be involved in reticular epithelial degeneration of the outer root sheath.
January 2026 in “International Journal of Research and Innovation in Applied Science” This case report details a rare instance of malignant proliferating trichilemmal tumour in a 60-year-old male, emphasizing the significance of histochemical and immunohistochemical markers for accurate diagnosis and differentiation from squamous cell carcinoma.
This study analyzed inner root sheath-specific genes in Tan sheep during various growth stages, finding peak expression at birth. The pattern of genes KRT71, KRT72, and TCHH is consistent with wool crimp, potentially influencing wool morphology.
Trichodysplasia spinulosa can occur after a heart transplant due to immunosuppressive drugs.
30 citations
,
July 2021 in “Annals of Botany” This study observed that maize plants enhance phosphorus acquisition by promoting both root hair growth and lateral root development in response to localized nutrient patches, highlighting a complementary root trait trade-off.
4 citations
,
August 2025 in “Plant Cell & Environment” This study found that the plant-growth-promoting bacteria Azospirillum brasilense enhances root hair development by increasing auxin levels and activating specific transcription factors, highlighting key signaling pathways involved in this process.
1 citations
,
November 2023 in “Rice” This study found that PRX102, a peroxidase with a unique polar localization pattern, plays a role in root hair growth by aiding the transport of materials to the tips of growing root hairs.
356 citations
,
December 1986 in “The journal of cell biology/The Journal of cell biology” This study found that specific human hair keratins are differentially expressed in the hair follicle, suggesting a shared pathway of epithelial differentiation between hair cortex and nail plate cells.
287 citations
,
March 1999 in “The Plant Journal” This study found that disrupting the microtubule cytoskeleton in Arabidopsis root hairs caused loss of growth directionality and suggested microtubules interact with calcium gradients to regulate apical growth stability.
253 citations
,
March 1994 in “Developmental dynamics” This study suggests that programmed cell death plays a crucial role in shaping the structure of the human epidermis and its appendages during development.
146 citations
,
May 2002 in “The American journal of pathology” This study found that cathepsin L deficiency in mice led to significant abnormalities in hair follicle development and cycling, including disrupted hair shaft outgrowth and premature hair growth phase entry.
130 citations
,
April 2003 in “Journal of Investigative Dermatology” This study reports the cloning and expression details of two new human type II keratins, K6irs3 and K6irs4, in the hair follicle's inner root sheath, suggesting a distinct functional role related to hair structure.
96 citations
,
October 2000 in “The FASEB Journal” In this study, researchers found that p75 neurotrophin receptor signaling affects apoptosis during hair follicle regression in mice, and altering its activity might help manage disorders involving early catagen entry.
90 citations
,
June 2006 in “The American Journal of Dermatopathology” This review outlines the classification, histopathologic presentation, and pathogenetic concepts of scarring and nonscarring alopecias, reporting no new clinical results and emphasizing the need for clinicopathologic correlation.
60 citations
,
January 2014 in “Anais Brasileiros De Dermatologia” This article discusses the foundational concepts of nanotechnology and its contributions to dermatology and medicine, but does not present new research findings.
46 citations
,
January 1996 in “Journal of The American Academy of Dermatology” This study identified the presence of apoptotic or necrotic keratinocytes and hair shaft dystrophy as potential markers of hair loss in patients with HIV-1 infection.
44 citations
,
January 2023 in “New Phytologist” This study found that low temperature triggers root hair elongation in Arabidopsis thaliana through a FERONIA-ROP2-TORC signaling pathway, also activated by nitrogen deficiency.
44 citations
,
December 1991 in “Annals of the New York Academy of Sciences” This study observed that epidermal growth factor and fibroblast growth factor have distinct roles in sheep skin, with EGF involved in differentiation and FGF in bulb proliferation and fiber growth.
40 citations
,
March 2017 in “The journal of investigative dermatology/Journal of investigative dermatology” This study visualized mitochondrial metabolism in cultured bovine hair follicles and plucked human hairs, finding that ROS and mitochondrial polarization correlate in specific hair follicle regions, particularly near keratin deposition sites.
40 citations
,
January 2016 in “Elsevier eBooks” This article explains the structure and multifunctional roles of the human skin, including its protective, regulatory, and sensory functions, but does not report new research findings.