Abstract:
OBJECTIVE:Androgens have paradoxically different effects on hair follicles depending on body site, stimulating beard growth while inducing regression in some areas of the scalp. The mesenchyme derived dermal papilla at the base of the hair follicle regulates many aspects of the growth of follicular epithelium, and is probably the site of androgen action. Since 5 alpha-dihydrotestosterone is considered to be the active intracellular androgen in many target tissues and is required for some androgen-mediated hair growth, such androgen-sensitive cells should contain 5 alpha-reductase. This study was designed to investigate whether cultured human dermal papilla cells contain 5 alpha-reductase and whether the metabolic capacity varies with the body site of the follicle in line with the clinical picture. DESIGN:Testosterone metabolism in cultured dermal papilla cells from androgen sensitive beard follicles was compared with less androgen dependent non-balding scalp follicles. Primary cell cultures were established from follicles of 11 patients with normal hair growth. The cells were grown to confluence in 10-cm Petri dishes and incubated with 5 nM 3H-testosterone in serum-free medium for 2 hours. The cells and the culture medium were collected separately for individual analysis. MEASUREMENTS:Unlabelled carrier and 14C-marker steroids were added to both the cell and medium extracts before separation by thin-layer chromatography. The individual steroid identities were confirmed by recrystallizing up to five times to a constant 3H/14C ratio. RESULTS:Testosterone was taken up by both cell types; significant amounts of 5 alpha-dihydrotestosterone were recovered inside beard cells, but not in scalp cells, whereas androstenedione was identified in both. An unidentified compound was present intracellularly in both cell types, but was not present in the culture medium. 5 alpha-Dihydrotestosterone was present only in the culture medium of beard cells but androstenedione was present in a similar amount in the medium from both cell types. The presence of other steroids could not be confirmed in either the cell extracts or the culture medium. CONCLUSIONS:The production of 5 alpha-dihydrotestosterone by beard cells concurs with the poor beard growth in men with 5 alpha-reductase deficiency, supporting our hypothesis that androgens mediate their effects on the hair follicle via the mesenchyme-derived dermal papilla.
journal_name
Clin Endocrinol (Oxf)journal_title
Clinical endocrinologyauthors
Thornton MJ,Laing I,Hamada K,Messenger AG,Randall VAdoi
10.1111/j.1365-2265.1993.tb02420.xsubject
Has Abstractpub_date
1993-12-01 00:00:00pages
633-9issue
6eissn
0300-0664issn
1365-2265journal_volume
39pub_type
杂志文章abstract::Endocrine studies, using the four hypothalamic releasing hormones, gonadotrophin releasing hormone, thyrotrophin releasing hormone, corticotrophin releasing hormone and growth hormone releasing hormone, were performed in 33 males after admission with a major head injury. The test was repeated 7 days later in all 33 pa...
journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1111/j.1365-2265.1988.tb00257.x
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abstract::Rathke's cleft cysts (RCCs) are benign, sellar and/or suprasellar lesions originating from the remnants of Rathke's pouch. Although a common finding in routine autopsies (12-33% of normal pituitary glands), symptomatic cases are rare and comprise 5-15% of all surgically resected sellar lesions. Small, asymptomatic RCC...
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journal_title:Clinical endocrinology
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abstract:RATIONALE:In vitro fertilization (IVF) is a common treatment for infertility. In mice, IVF is associated with development of glucose intolerance. However, human data are limited regarding the metabolic, endocrine and inflammatory effects of IVF therapy in IVF-conceived pregnancies. OBJECTIVE:To explore effects of IVF ...
journal_title:Clinical endocrinology
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doi:10.1111/cen.14270
更新日期:2020-12-01 00:00:00
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journal_title:Clinical endocrinology
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doi:10.1111/j.1365-2265.2008.03241.x
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journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1111/j.1365-2265.1987.tb00834.x
更新日期:1987-07-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章
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更新日期:2017-01-01 00:00:00
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journal_title:Clinical endocrinology
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更新日期:2016-06-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章
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更新日期:1996-11-01 00:00:00
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journal_title:Clinical endocrinology
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doi:10.1046/j.1365-2265.1997.1290951.x
更新日期:1997-03-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1111/j.1365-2265.1980.tb01025.x
更新日期:1980-07-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1111/j.1365-2265.2009.03671.x
更新日期:2010-03-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1111/j.1365-2265.1995.tb01890.x
更新日期:1995-07-01 00:00:00
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journal_title:Clinical endocrinology
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doi:10.1111/j.1365-2265.1987.tb01165.x
更新日期:1987-09-01 00:00:00
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journal_title:Clinical endocrinology
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journal_title:Clinical endocrinology
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2017-06-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1111/j.1365-2265.1986.tb00758.x
更新日期:1986-02-01 00:00:00
abstract::Exposure to maternal hypothyroxinemia during pregnancy, which is characterized by low free T4 but normal thyroid-stimulating hormone (TSH) levels, can negatively affect the foetus. This review provides an overview of present findings concerning the association between maternal hypothyroxinemia during pregnancy and chi...
journal_title:Clinical endocrinology
pub_type: 杂志文章,评审
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更新日期:2013-08-01 00:00:00
abstract::In 63 consecutive patients with primary hyperparathyroidism (HPT) a prospective screening study was undertaken for coexistent multiple endocrine neoplasma-(MEN)-syndrome type 1. The screening consisted of a clinical examination, a radiological examination of the sella turcica with skeletal tomography (and in equivocal...
journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1111/j.1365-2265.1984.tb00070.x
更新日期:1984-02-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1111/j.1365-2265.2012.04427.x
更新日期:2012-10-01 00:00:00
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journal_title:Clinical endocrinology
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doi:10.1111/j.1365-2265.2010.03805.x
更新日期:2010-08-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1046/j.1365-2265.2001.01341.x
更新日期:2001-07-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章,随机对照试验
doi:10.1111/cen.12451
更新日期:2014-10-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1111/j.1365-2265.2011.04072.x
更新日期:2011-09-01 00:00:00
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journal_title:Clinical endocrinology
pub_type: 杂志文章
doi:10.1046/j.1365-2265.1998.00614.x
更新日期:1998-12-01 00:00:00