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Desarrollo del 14-epi-19-nortachisterol y su configuración de unión sin precedentes para el receptor humano de
Daisuke Sawada1, Yuya Tsukuda, Hiroshi Saito
1Faculty of Pharmaceutical Sciences, Teikyo University, 1091-1, Suwarashi, Sagamihara, Kanagawa 252-5195, Japan.
Journal of the American Chemical Society
|April 20, 2011
Resumen
Los investigadores sintetizaron nuevos derivados del 14-epi-19-nortacisterol, encontrando que son estables y se unen fuertemente al receptor de vitamina D (VDR). Este estudio marca el primer aislamiento de análogos estables de taquisterol con configuraciones de unión únicas.
Área de la Ciencia:
- Química orgánica sintética y orgánica.
- Endocrinología Endocrinología.
- Biología estructural Biología estructural.
Sus antecedentes:
- La previtamina D (3) y sus derivados son cruciales en la homeostasis del calcio y en los procesos celulares.
- Los análogos del taquisterol son conocidos, pero a menudo carecen de estabilidad.
- Comprender las interacciones del ligando del receptor de vitamina D (VDR) es clave para desarrollar agentes terapéuticos.
Objetivo del estudio:
- Para sintetizar y caracterizar los nuevos derivados de la 14-epi-19-norprevitamina D.
- Investigar la estabilidad y la afinidad de unión VDR de estos nuevos compuestos.
- Para aclarar la configuración de unión de estos análogos dentro del bolsillo de unión de ligando del VDR humano (hVDR).
Principales métodos:
- Síntesis química de la 14-epi-19-norprevitamina D3 y su posterior isomerización C6,7-cis/trans.
- Aislamiento y purificación de los derivados resultantes del 14-epi-19-nortachisterol.
- Evaluación de la estabilidad del compuesto y la afinidad de unión con el hVDR utilizando ensayos bioquímicos establecidos.
- Análisis estructural para determinar la configuración del trieno dentro del hVDR.
Principales resultados:
- Síntesis exitosa de los derivados del 14-epi-19-nortachisterol.
- Se ha demostrado una marcada estabilidad y una potente afinidad de unión VDR para los análogos sintetizados.
- Se ha reportado el primer aislamiento de análogos estables del taquisterol.
- Configuraciones de unión sin precedentes (C5,6-s-trans y C7,8-s-trans trieno) observadas en el bolsillo de unión de ligando de hVDR.
Conclusiones:
- Se han sintetizado análogos estables del taquisterol con una potente unión al VDR.
- Estos nuevos compuestos exhiben modos de unión únicos dentro de la hVDR, distintos de los compuestos naturales de vitamina D.
- Los hallazgos abren nuevas vías para diseñar terapias dirigidas a VDR con propiedades de unión personalizadas.
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