95 citations
,
July 2006 in “British Journal of Dermatology” This study observed that vitamin D receptor expression in certain hair follicle cells varies throughout the murine hair cycle, suggesting a potential role for 1,25-dihydroxyvitamin D3 in hair follicle biology.
144 citations
,
December 2004 in “Molecular Endocrinology” This study found that the effects of the vitamin D receptor on hair follicle cycling in mice are independent of its ability to bind a hormone, with specific domain mutations influencing hair regrowth outcomes.
140 citations
,
April 2004 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that mice lacking the 1αOHase enzyme, which is responsible for producing a key vitamin D metabolite, showed impaired epidermal differentiation and delayed recovery of skin barrier function after disruption.
215 citations
,
September 2003 in “Journal of Biological Chemistry” This study found that the hairless gene product (Hr) suppresses VDR-mediated gene activation by directly interacting with the vitamin D receptor, potentially affecting hair follicle function.
40 citations
,
October 2002 in “Endocrinology” In this study, synthetic vitamin D3 analogs stimulated hair growth and formation of normal hair follicles in nude mice, unlike the natural form 1,25 dihydroxyvitamin D3.
57 citations
,
April 2002 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that the vitamin D receptor is crucial for initiating the postnatal hair follicular cycle in mice, preventing alopecia associated with its inactivation.
180 citations
,
January 2002 in “The journal of investigative dermatology/Journal of investigative dermatology” This study observed that vitamin D receptor knockout mice exhibit impaired epidermal differentiation and progressive hair loss, suggesting the importance of the vitamin D receptor in normal skin and hair follicle development.
115 citations
,
December 2001 in “Endocrinology” This study found that restoring vitamin D receptor expression specifically in the keratinocytes of VDR null mice prevented alopecia and enhanced hair follicle response during anagen initiation.
178 citations
,
October 2001 in “Genes & Development” This study found that the mammalian hairless gene encodes a corepressor protein that interacts with thyroid hormone receptors, providing insights into hair loss syndromes in humans and mice.
139 citations
,
September 2001 in “The journal of investigative dermatology/Journal of investigative dermatology” This case report describes a patient with mutations in both alleles of the vitamin D receptor who exhibited hair loss clinically indistinguishable from generalized atrichia with papules, suggesting a potential genetic pathway shared with the hairless gene.
137 citations
,
April 2001 in “Journal of Clinical Investigation” This study found that alopecia in VDR-null mice persists despite undetectable vitamin D levels, indicating a defect in epithelial-mesenchymal communication due to the absence of ligand-independent receptor function.
114 citations
,
June 2000 in “Endocrinology” In this study, the researchers found that alopecia in VDR null mice is likely due to issues with hair cycle initiation rather than defects in keratinocyte proliferation or differentiation.
47 citations
,
April 2000 in “Experimental Dermatology” This study identified a novel missense mutation in the hairless gene in a Polish family, which may contribute to congenital atrichia with papular lesions by affecting the gene's function.
66 citations
,
December 1999 in “Journal of Investigative Dermatology” New mutations in the hairless gene may cause hair loss and affect bone development.
37 citations
,
August 1999 in “Journal of Investigative Dermatology” This study identified a nonsense mutation in the zinc-finger domain of the hairless gene associated with congenital atrichia in a Japanese family, indicating a potential genetic cause for this rare form of alopecia.
166 citations
,
July 1999 in “American Journal Of Pathology” This study found that the loss of a functional hr gene in mice leads to premature and abnormal hair follicle regression, disrupting normal hair cycling and architecture.
83 citations
,
October 1998 in “The American Journal of Human Genetics” A specific gene mutation causes complete hair loss in an Irish Traveller family.
519 citations
,
October 1998 in “Endocrinology” The study found that normalizing mineral ion levels in vitamin D receptor-ablated mice prevented hyperparathyroidism and bone disorders but did not address hair loss, indicating the VDR's role in hair growth.
126 citations
,
October 1998 in “Experimental Dermatology” This review provides an overview of the hairless gene in mice and humans, discussing its structure, expression, and implications for understanding skin physiology and human disorders related to gene disruption, but it reports no new empirical findings.
53 citations
,
October 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that cyclophosphamide induced significant keratinocyte apoptosis in anagen hair follicles of mice, while topical calcitriol-analogs reduced this apoptosis, suggesting a protective effect against chemotherapy-induced alopecia.
412 citations
,
January 1998 in “Science” This study identified a missense mutation in the human hairless gene associated with a rare form of recessively inherited alopecia universalis, pinpointed on chromosome 8p12.