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Un nuevo papel de los nucleótidos extracelulares en la calcificación de las válvulas: un objetivo potencial para la

Lana Osman¹, Adrian H Chester, Mohamed Amrani

¹Imperial College, Royal Brompton and Harefield National Health Service Trust, Harefield, Middlesex, UK.

|July 6, 2006

Resumen

El ATP extracelular promueve la diferenciación de los osteoblastos en las células de la válvula humana, mientras que la adenosina tiene un efecto inhibidor. Esto sugiere nuevos objetivos terapéuticos para la enfermedad de la válvula aórtica calcifica.

Área de la Ciencia:

Biología Cardiovascular Biología Cardiovascular
La bioquímica es la bioquímica.
Biología celular Biología celular.

Sus antecedentes:

La enfermedad de la válvula aórtica calcifica implica inflamación y células similares a los osteoblastos.
El ATP extracelular y la adenosina están implicados en la remodelación ósea y la inflamación.
Los mecanismos celulares en la enfermedad de la válvula aórtica siguen sin estar claros.

Objetivo del estudio:

Investigar las funciones del ATP extracelular y la adenosina en la diferenciación osteoblástica de las células intersticiales de la válvula humana.
Explorar posibles objetivos terapéuticos para la enfermedad de la válvula aórtica calcifica.

Principales métodos:

Las células intersticiales primarias de la válvula humana (CI) fueron cultivadas y tratadas con medios osteogénicos, ATP, ATP-gamma-S y adenosina durante 21 días.
La actividad y expresión de la fosfatasa alcalina (ALP) se midieron mediante espectrofotometría e inmunocitoquímica.
Se evaluaron los efectos del tratamiento con atorvastatina sobre la actividad de la ALP y el desglose de la ATP.

Principales resultados:

El ATP y el ATP-gamma-S aumentaron significativamente la actividad y la expresión de la ALP en el IC de la válvula.
La adenosina por sí sola no afectó la actividad de la ALP, pero redujo la ALP inducida por medios osteogénicos.
La atorvastatina inhibió la actividad de la ALP inducida por ATP y aumentó la degradación de ATP a la adenosina.

Conclusiones:

Los nucleótidos extracelulares juegan un papel novedoso en la inducción de la diferenciación de los osteoblastos en las válvulas humanas.
Estos hallazgos ofrecen estrategias terapéuticas potenciales para prevenir la progresión de la enfermedad de la válvula aórtica calcifica.

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