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In this study, γ-ray exposure in mice decreased hair follicle density and pigmentation, suggesting damage to stem cells affecting hair follicle regeneration.

In this study, γ-ray irradiation in mice during the first telogen phase led to decreased hair follicle density and pigmentation anomalies, suggesting damage to stem cells and progenitors for keratinocytes and melanocytes.

This study found that intermediate filaments and matrix proteins in presumptive hair shaft cells are synthesized sequentially, identifying a new polypeptide component that changes during hair cell differentiation.

Estetrol (E4) can help hair grow longer by extending its growth phase.

In this study, estetrol (E4) treatment was associated with increased hair growth in ex vivo human hair follicles, suggesting its potential as a treatment for hair loss disorders.

This study found that MAP-2 is intensely expressed in the companion layer of the hair follicle, suggesting its potential importance to follicle integrity and possible involvement in some types of alopecia.

Minoxidil works in liver and outer hair root sheath for hair growth.

This study found that cyclophosphamide-induced hair follicle damage in C3H mice could be remodelled into intact anagen hair follicles with topical cyclosporin A, especially in anagen IV stage follicles.

This study suggests that damaged anagen hair follicles have the capability to repair themselves and resume growth by mobilizing extra-bulge epithelial cells, particularly after injuries like chemotherapy and radiotherapy.

This study found that mycophenolic acid promotes dermal papilla cell proliferation and anagen hair follicle induction in mice, suggesting potential as a treatment for hair-loss disorders.

This study found that CD90+ cells, resembling mesenchymal stem cells, are abundantly present in the lower part of anagen hair follicles in dogs.

This study found that CD90+ stem cells with fibroblast-like morphology are present in the lower part of the anagen hair follicle in dogs.

This study describes the presence of SARS-CoV-2 in hair follicles from a patient with early-onset post-COVID hair loss, suggesting a potential direct impact of the virus on hair physiology.

This study found that minoxidil sulfate did not enhance hair follicle growth or cell proliferation in isolated human hair follicles at concentrations of 0.1, 1, and 10 μg/ml.

This study found that VEGFR-2 activation may play a role in hair follicle differentiation, proliferation, and apoptosis by co-expressing with several key proteins in normal human scalp skin.

This study observed that the mechanical connection between hair follicles and connective tissue in human fetal scalp skin is weaker than in the corresponding skin components, reflecting dynamic processes in hair growth.

This study found that 17α‐estradiol increases aromatase activity in female hair follicles, which may explain its beneficial effects in treating androgenetic alopecia.

This study found that keratin 6hf, a type II keratin, is expressed in specific regions of mouse and human hair and suggests potential interactions with keratin 17, impacting hair development and associated disorders.

This study found that in anagen hair follicles, the basement membrane zone components showed decreased expression in the lower hair bulb, with a complete absence of BP230 at the dermal papilla junction, suggesting an incomplete hemidesmosome structure in these regions.

This study found that distinct glycoconjugate expression patterns in human hair follicle cells suggest complex carbohydrate metabolism, revealing a unique sugar moiety in outer root sheath cells not present in other keratinocytes.

This study found that asynchronous differentiation in human anagen hair follicles involves specific localization of c-Myc and interrelated genes Max and Bin1 along the inner root sheath.

This study reports that Plantago asiatica L. extract may promote hair growth by enhancing growth factor production and activating specific signaling pathways in hair follicle dermal papilla cells.

In this study, cyclic ADP-ribose (cADPR) treatment in human hair follicle dermal papilla cells was associated with increased intracellular calcium retention and activated anagen-related signaling without causing significant cytotoxicity, indicating its potential impact on hair growth processes.

This study found that a novel drinkable supplement significantly increased hair density and reduced hair shedding over six months in women with telogen effluvium, although the authors emphasize the need for larger, placebo-controlled trials to confirm these promising results.

This study found that applying amaranthus extract cream to the scalp significantly improved terminal hair density, anagen hair count, and pilary index in men with male pattern hair loss, suggesting it may be a safe and effective supportive therapy.

This study examined the expression patterns of various cytokeratins in the outer root sheath of human anagen hair follicles, noting distinct differentiation patterns and localization of keratin markers.

In this pilot study, the researchers observed that transplanting anagen hair follicles into human scars can promote remodeling of fibrotic tissue and inhibit pro-fibrotic factors, offering potential new treatments for mature scars.

This pilot study suggests that autophagy is crucial for anagen maintenance in human hair follicles, and targeting this process may help manage hair growth disorders.

This study found that 17-beta-estradiol inhibits hair growth in mice by blocking hair follicles in the telogen phase, whereas an estrogen receptor antagonist promotes hair growth by initiating anagen.

This study demonstrates that pea sprout extract promotes hair growth by activating specific signaling pathways and providing antioxidant and anti-inflammatory effects, suggesting its potential as a natural alopecia treatment.