Abstract:
:The precursor protein proopiomelanocortin (POMC) produces many biologically active peptides via a series of enzymatic steps in a tissue-specific manner, yielding the melanocyte-stimulating hormones (MSHs), corticotrophin (ACTH) and beta-endorphin. The gene for alpha-MSH is encoded for by the POMC gene, but alpha-MSH cannot be produced from POMC gene transcription and translation without these specific post-translational proteolytic steps taking place. The MSHs and ACTH bind to the extracellular G-protein-coupled melanocortin receptors (MCR), of which there are five subtypes. Two (MC1R and MC5R) show widespread cutaneous expression. ACTH and alpha-MSH bind to MC1R to influence both pigmentation and the immune system. MC5R regulates the sebaceous glands. Mutations in the MC1R gene lead to fair skin and red hair in humans, which is also seen with inactivating human POMC gene mutations. MC1R mutant receptor expression can also correlate with an increased incidence of the three commonest forms of skin cancer. Other mutations can occur in the POMC system or parallel interacting pathways, such as in prohormone convertase 1 and agouti signalling protein, a human homologue of murine agouti protein. However, they do not necessarily affect skin colour or function in humans, and further studies are needed to clarify these observations.
journal_name
Clin Exp Dermatoljournal_title
Clinical and experimental dermatologyauthors
Millington GWdoi
10.1111/j.1365-2230.2006.02128.xsubject
Has Abstractpub_date
2006-05-01 00:00:00pages
407-12issue
3eissn
0307-6938issn
1365-2230pii
CED2128journal_volume
31pub_type
杂志文章,评审abstract::We report the case of a 24-year-old woman with an 8-month history of deep pelvic pain and postcoital bleeding. Examination revealed desquamation of the vaginal epithelium with tender fissured plaques in the vagina, initially thought to be vaginal intraepithelial neoplasia. Histology showed squamous mucosa with supraba...
journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
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journal_title:Clinical and experimental dermatology
pub_type: 杂志文章
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journal_title:Clinical and experimental dermatology
pub_type: 杂志文章
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更新日期:2015-03-01 00:00:00
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更新日期:2005-07-01 00:00:00
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journal_title:Clinical and experimental dermatology
pub_type: 杂志文章,评审
doi:
更新日期:1996-03-01 00:00:00
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journal_title:Clinical and experimental dermatology
pub_type: 杂志文章
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更新日期:2020-03-01 00:00:00
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journal_title:Clinical and experimental dermatology
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更新日期:2012-04-01 00:00:00
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journal_title:Clinical and experimental dermatology
pub_type: 杂志文章
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journal_title:Clinical and experimental dermatology
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doi:10.1046/j.1365-2230.1999.00425.x
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journal_title:Clinical and experimental dermatology
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更新日期:2009-12-01 00:00:00
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journal_title:Clinical and experimental dermatology
pub_type: 杂志文章,评审
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更新日期:2019-12-01 00:00:00
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更新日期:2009-07-01 00:00:00
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journal_title:Clinical and experimental dermatology
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 and experimental dermatology
pub_type: 杂志文章
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更新日期:2015-12-01 00:00:00
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pub_type: 杂志文章
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更新日期:2020-08-01 00:00:00
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journal_title:Clinical and experimental dermatology
pub_type: 杂志文章
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更新日期:2009-12-01 00:00:00
abstract::We report a case of follicular porokeratosis of Mibelli affecting the natal cleft in a 42-year-old white man. To our knowledge, this is the first report in the English-language literature of follicular porokeratosis of Mibelli limited to the genitogluteal area. ...
journal_title:Clinical and experimental dermatology
pub_type: 杂志文章,评审
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更新日期:2009-01-01 00:00:00
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journal_title:Clinical and experimental dermatology
pub_type: 杂志文章
doi:10.1111/j.1365-2230.1994.tb02695.x
更新日期:1994-09-01 00:00:00