tachysterol


tachysterol
Sterol(s) formed by ultraviolet irradiation of any 5,7-diene-3β-sterol, which breaks the 9,10 bond, but usually from either or both of ergosterol and lumisterol to produce t.2 (ertacalciol, (6E,22E)-9,10-secoergosta-5(10),6,8,22-tetraen-3β-ol) and from 7-dehydrocholesterol to produce t.3 (tacalciol, (6E,3S)-9,10-secocholesta-5(10),6,8-trien-3β-ol). When reduced to the 5,7-diene (or 5,7,22-triene) form, dihydrotachysterol3 (10,19-dihydrocalciol) or dihydrotachysterol2 (10,19-dihydroercalciol), antirachitic action appears. This property has been of therapeutic interest, but t. is being replaced by the true vitamin D hormone (calcitriol) and its derivatives.

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ta·chys·ter·ol ta-'kist-ə-.rȯl, -.rōl n an oily liquid alcohol C28H43OH isomeric with ergosterol that is formed by ultraviolet irradiation of ergosterol or lumisterol and that on further irradiation yields vitamin D2 see DIHYDROTACHYSTEROL

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tach·ys·te·rol (tak-isґtə-rol) an isomer of ergosterol produced by irradiation.

Medical dictionary. 2011.

Look at other dictionaries:

  • tachysterol — [ta kis′tər ôl΄, tə kis′tərōl΄] n. 〚 TACHY + STEROL〛 an isomer of ergosterol, C28H44O, formed during the production of calciferol by the irradiation of ergosterol * * * ta·chys·ter·ol (tə kĭsʹtə rôl , rōl ) n. An isomer of ergosterol that forms… …   Universalium

  • tachysterol — [ta kis′tər ôl΄, tə kis′tərōl΄] n. [ TACHY + STEROL] an isomer of ergosterol, C28H44O, formed during the production of calciferol by the irradiation of ergosterol …   English World dictionary

  • tachysterol — n. isomer of ergosterol that forms vitamin D2 when irradiated with ultraviolet light (Biochemistry) …   English contemporary dictionary

  • tachysterol — ta·chys·ter·ol …   English syllables

  • tachysterol — taˈkistəˌrȯl, təˈk , rōl noun Etymology: tachy + sterol : an oily liquid alcohol C28H43OH isomeric with ergosterol that is formed by ultraviolet irradiation of ergosterol or lumisterol and that on further irradiation yields vitamin D2 compare… …   Useful english dictionary

  • 1,25-Dihydroxycholecalciferol — Strukturformel Allgemeines Trivialname Vitamin D3 Andere Namen Cholecalciferol …   Deutsch Wikipedia

  • Calciol — Strukturformel Allgemeines Trivialname Vitamin D3 Andere Namen Cholecalciferol …   Deutsch Wikipedia

  • Cholecalciferol — Strukturformel Allgemeines Trivialname Vitamin D3 …   Deutsch Wikipedia

  • Colecalciferol — Strukturformel Allgemeines Trivialname Vitamin D3 Andere Namen Cholecalciferol …   Deutsch Wikipedia

  • Kalziferol — Strukturformel Allgemeines Trivialname Vitamin D3 Andere Namen Cholecalciferol …   Deutsch Wikipedia