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Abstract
We examined the effect of 1,25-dihydroxyvitamin D3 (1,25(OH)2D3) on the growth and differentiation of cultured human hair outer root sheath cells
(ORSC) from normal subjects and patients with vitamin D-dependent rickets type II
(DDR-II) with alopecia. 1,25(OH)2D3 dose-dependently suppressed the plating efficiency, clonal growth, and DNA synthesis
of normal ORSC. It enhanced the cornified envelope formation and caused morphological
changes in the cells. All results indicated the existence of specific receptors for
1,25(OH)2D3 in the ORSC, and suggest that 1,25(OH)2D3 is a potent inhibitor of proliferation of ORSC as well as a stimulator of terminal
differentiation. However, the cells from DDR-II patients with alopecia did not respond
to 1,25(OH)2D3, suggesting a lack of the specific receptors in the cells. The differences in the
cellular response to the hormone between the normal ORSC and those from the patients
were apparent and easily distinguishable, therefore this experiment may be a rapid
and simple diagnostic test for DDR-II patients with alopecia.
Large number of hairs were difficult to obtain from patients with alopecia, and we
developed a new culture method to accomplish these studies from a few plucked hair
follicles. Our system may be useful in the culture of ORSC from limited number of
follicles, and could be utilized to analyse the cellular characteristics of ORSC in
patients with hair diseases.
Keywords
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Article info
Publication history
Accepted:
April 22,
1991
Received:
August 11,
1990
Identification
Copyright
© 1991 Published by Elsevier Inc.