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La clonación y la expresión de un ADN complementario que codifica un receptor bovino adrenal de angiotensina II tipo
K Sasaki1, Y Yamano, S Bardhan
1Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232.
Nature
|May 16, 1991
Resumen
Los investigadores clonaron con éxito una expresión de cDNA de un receptor de angiotensina II bovino. Este avance supera los desafíos anteriores en el estudio del receptor de angiotensina II tipo 1, crucial para la regulación cardiovascular y neuronal.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- La bioquímica es la bioquímica.
- Farmacología Farmacología.
Sus antecedentes:
- La angiotensina II regula el transporte cardiovascular, neuronal y de electrolitos.
- Los intentos anteriores de aislar el receptor de angiotensina II fracasaron debido a la inestabilidad y las bajas concentraciones.
Objetivo del estudio:
- Para superar las dificultades en la purificación del receptor de la angiotensina II.
- Para identificar y caracterizar el receptor de la angiotensina II bovina.
Principales métodos:
- La clonación de expresión de un ADN complementario (ADNc) que codifica el receptor de la angiotensina II bovina.
- Transfección de las células COS-7 con el receptor cDNA.
- Ensayos de unión de ligandos y mediciones intracelulares de calcio/inositol trifosfato.
- Análisis de la mancha del norte para determinar la expresión del ARN mensajero.
Principales resultados:
- El ADNc clonado codifica una proteína de 359 aminoácidos con una topología de receptores acoplados a proteínas G.
- Las células transfectadas exhibieron una unión específica de alta afinidad para la angiotensina II y los antagonistas.
- La estimulación de la angiotensina II/III aumentó el Ca2+ intracelular y el inositol-1,4,5-trisfosfato.
- El receptor se identifica como el receptor de angiotensina II tipo 1.
- Expresión de ARN mensajero detectada en la glándula suprarrenal y el riñón bovinos.
Conclusiones:
- Expresión exitosa de la clonación del receptor bovino de angiotensina II tipo 1.
- El receptor clonado media las vías clave de señalización de la angiotensina II.
- Esto proporciona una nueva vía para estudiar la función y la regulación del receptor de angiotensina II.
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