7-Dehydrocholesterol/ja: Difference between revisions

7-Dehydrocholesterol/ja
Created page with "7-デヒドロコレステロール"
 
Created page with "{{DEFAULTSORT:Dehydrocholesterol, 7-}} Category:Cholestanes Category:Sterols Category:Nutrition Category:Vitamin D"
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| ImageFile1 = 7-Dehydrocholesterol molecule ball.png
| ImageFile1 = 7-Dehydrocholesterol molecule ball.png
| ImageSize1 = 250
| ImageSize1 = 250
| ImageAlt1 = Ball-and-stick model of 7-dehydrocholesterol
| ImageAlt1 = 7-デヒドロコレステロールのボール&スティックモデル
| IUPACName = Cholesta-5,7-dien-3β-ol
| IUPACName = Cholesta-5,7-dien-3β-ol
| SystematicName = (1''R'',3a''R'',7''S'',9a''R'',9b''S'',11a''R'')-9a,11a-Dimethyl-1-[(2''R'')-6-methylheptan-2-yl]-2,3,3a,6,7,8,9,9a,9b,10,11,11a-dodecahydro-1''H''-cyclopenta[''a'']phenanthren-7-ol
| SystematicName = (1''R'',3a''R'',7''S'',9a''R'',9b''S'',11a''R'')-9a,11a-Dimethyl-1-[(2''R'')-6-methylheptan-2-yl]-2,3,3a,6,7,8,9,9a,9b,10,11,11a-dodecahydro-1''H''-cyclopenta[''a'']phenanthren-7-ol
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[[Image:Skinlayers.png|thumb|250px|right|The epidermal strata of the skin.]]  
[[Image:Skinlayers.png|thumb|250px|right|皮膚の表皮層]]  
'''7-Dehydrocholesterol''' ('''7-DHC''') is a [[zoosterol]] that functions in the [[blood plasma|serum]] as a [[cholesterol]] precursor, and is [[photochemically]] converted to [[Cholecalciferol|vitamin D<sub>3</sub>]] in the [[skin]], therefore functioning as [[provitamin]]-D<sub>3</sub>. The presence of this compound in human skin enables humans to manufacture vitamin D<sub>3</sub> ([[cholecalciferol]]).  Upon exposure to [[ultraviolet]] UV-B rays in the sun light, 7-DHC is converted into vitamin D<sub>3</sub> via [[Previtamin D3|previtamin D<sub>3</sub>]] as an intermediate [[isomer]]. It is also found in the [[milk]] of several mammalian species. [[Lanolin]], a waxy substance that is naturally secreted by wool-bearing mammals, contains 7-DHC which is converted into vitamin D by sunlight and then ingested during grooming as a nutrient. In insects 7-dehydrocholesterol is a precursor for the hormone [[ecdysone]], required for reaching adulthood. It was discovered by Nobel-laureate organic chemist [[Adolf Windaus]].
'''7-デヒドロコレステロール''''''7-DHC''')は[[zoosterol/ja|動物ステロール]]の一種で、[[blood plasma/ja|血清]]では[[cholesterol/ja|コレステロール]]前駆体として機能し、[[skin/ja|皮膚]]では[[photochemically/ja|光化学的]][[Cholecalciferol/ja||ビタミンD<sub>3</sub>]]に変換されるため、[[provitamin/ja|プロビタミン]]-D<sub>3</sub>として機能する。ヒトの皮膚にこの化合物が存在することで、ヒトはビタミンD<sub>3</sub>[[cholecalciferol/ja|コレカルシフェロール]])を製造することができる。 [[ultraviolet/ja|紫外線]]を浴びると、ビタミンDは生成される。太陽光に含まれる[[UV-B]]を浴びると、7-DHCは中間[[異性体]]として[[Previtamin D3/ja|プレビタミンD<sub>3</sub>]]を経由してビタミンD<sub>3</sub>に変換される。また、いくつかの哺乳類の[[milk/ja|乳]]にも含まれている。羊毛を持つ哺乳類が自然に分泌する[[lanolin/ja|ラノリン]]という蝋状の物質には7-DHCが含まれており、日光によってビタミンDに変換され、毛づくろいの際に栄養素として摂取される。昆虫では、7-デヒドロコレステロールは成虫になるために必要なホルモン[[ecdysone/ja|エクダイソン]]の前駆体である。ノーベル賞受賞の有機化学者[[:en:Adolf Windaus|アドルフ・ウィンダウス]]によって発見された。
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== こちらも参照 ==
== See also ==
* [[Vitamin D/ja]]
* [[Vitamin D]]
* [[Smith–Lemli–Opitz syndrome/ja]]
* [[Smith–Lemli–Opitz syndrome]]
* [[7-Dehydrocholesterol reductase/ja]]
* [[7-Dehydrocholesterol reductase]]
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{{Vitamin/ja}}
{{Vitamin}}
{{Cholesterol metabolism intermediates/ja}}
{{Cholesterol metabolism intermediates}}
{{Vitamin D receptor modulators/ja}}
{{Vitamin D receptor modulators}}
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{{二次利用|date=9 December 2023}}
{{DEFAULTSORT:Dehydrocholesterol, 7-}}
{{DEFAULTSORT:Dehydrocholesterol, 7-}}
[[Category:Cholestanes]]
[[Category:Cholestanes]]
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[[Category:Nutrition]]
[[Category:Nutrition]]
[[Category:Vitamin D]]
[[Category:Vitamin D]]
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