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In this study, gene therapy using a VDR-expressing adenoviral vector significantly improved hair growth and reduced cyst formation in Vdr -KO rats with alopecia linked to type II rickets, whereas control treatments did not show these effects.

A genetic mutation caused severe rickets and alopecia in an Indian patient, but high-dose calcium and phosphate treatment improved their condition.

In this study involving genetically modified rats, researchers observed that specific mutations in the vitamin D receptor affect calcium levels and bone formation, emphasizing the receptor's role in maintaining healthy bone density and its importance in regulating hair cycle and skin health.

In this study, gene therapy using a VDR-expressing adenoviral vector promoted hair growth in Vdr-KO rats, suggesting its potential for treating alopecia associated with type II rickets.

People with hair loss have more androgen receptors and enzymes in certain follicles, with men and women showing different patterns.

TGF-β receptors are crucial for hair follicle development.

This laboratory study concluded that TRPA1 and TRPV1 channels do not play a role in mechanotransduction processes in slowly adapting type II mechanoreceptors in isolated rat sinus hair follicles.

This abstract discusses two types of hereditary vitamin D metabolism defects, VDDR I and VDDR II, and reports on their distinct characteristics and treatment responses, without presenting new clinical data.

In this case report, researchers described a two-year-old girl with Vitamin D dependent rickets Type II, noting elevated 1,25-dihydroxyvitamin D3 and alopecia, and observed limited treatment response likely due to poor compliance.

In this study, 1,25-dihydroxyvitamin D3 inhibited growth and promoted differentiation in normal hair follicle cells but did not affect cells from a patient with vitamin D-dependent rickets type II, assisting in potential rapid diagnosis of the condition.

This case study reports that a 3 ½ year-old male with vitamin D-dependent type II rickets showed partial improvement in alopecia and rickets when treated with high doses of 1,25(OH)2 vitamin D3.

This study observes the expression of mRNA for androgen receptor, 5α‐reductase, and 17β‐hydroxysteroid dehydrogenase in human dermal papilla cells.

This study observed wide clinical diversity among five patients with the same VDR gene mutation causing vitamin D-dependent rickets type II, suggesting involvement of a nuclear accessory factor and a nongenomic action of the vitamin.

In this case report, a four-year-old girl was diagnosed with vitamin D-dependent rickets type II, manifesting as diffuse alopecia, frontal bossing, hypoplastic teeth, and skin-colored papules, due to a genetic mutation causing resistance to 1.25-dihydroxy vitamin D.

This study found that in androgenetic alopecia patients, there is enhanced expression of type 2 TGF-β and type II receptors in hair follicles, suggesting a link to hair growth cycle changes.

This study found that increased expression of type 2 TGF-β and type II receptor was observed in the bald vertex area of hair follicles from androgenetic alopecia patients, suggesting a role in catagen induction.

This study found that STAT3 signaling is essential for initiating the hair growth phase but not involved in hair follicle development during the fetal period.

This study found that in vitro, beard dermal papilla cells stimulated keratinocyte proliferation via androgen-dependent growth factors, while androgenetic alopecia cells released TGF-β1, inhibiting keratinocyte growth.

This study found that individuals with early onset extensive androgenetic alopecia have an elevated ratio of DHT to testosterone, but no significant genetic linkage to markers on chromosomes 2 or 5 was detected.

This study found that in vitro treatments with 5alpha-reductase inhibitors and androgen receptor antagonists strongly stimulate VEGF expression in dermal papilla cells.

In this study, androgens were found to stimulate keratinocyte growth in co-culture with beard dermal papilla cells but inhibit it in co-culture with balding frontal scalp DPCs, mediated by TGF-beta1.

This study suggests that beard dermal papilla cells may produce androgen-dependent growth factors that stimulate keratinocyte proliferation, while frontal scalp cells can have an inhibitory effect mediated by TGF-β1.

Atypical male hair loss may not respond to usual treatments.

This review discusses treatments for androgenic alopecia, including minoxidil, finasteride, and hormonal therapies with antiandrogens, and reports no new clinical findings.

This study found that all-trans-retinoic acid (ATRA) inhibits mink hair follicle growth by reducing dermal papilla cell proliferation and inducing apoptosis, likely through the TGF-β2/Smad2/3 pathway.

This case report details a woman with postural orthostatic tachycardia syndrome who experienced notable dermatological symptoms, including evanescent hyperemia, which improved with the use of an oral angiotensin II type 1 receptor antagonist.

This study found that the vitamin D-VDR system is crucial for mineral and bone metabolism post-weaning and identified missense mutations in 1alpha-hydroxylase causing type I rickets.

This article reviews the multifaceted roles of vitamin D beyond bone health and notes its potential involvement in reducing risks of certain cancers and autoimmune diseases, but it presents no new clinical results.

This study systematically reviewed 43 articles on the role of fibroblasts, especially dermal papilla cells, in androgenic alopecia, identifying androgen signaling and related pathways as key drivers of hair follicle miniaturization, which supports targeting dermal papilla cell dysfunction as a therapeutic strategy.

This study found elevated unoccupied type II GC receptors and decreased thioredoxin levels in alopecia areata patients' scalps, which may explain the variable effectiveness of glucocorticoid treatment for hair regrowth.