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Relaciones entre la homocisteína, el factor VIIa y la generación de trombina en los síndromes coronarios agudos
M K Al-Obaidi1, H Philippou, P J Stubbs
1National Heart and Lung Institute, Cardiology and Haematology Departments, Charing Cross Campus, Imperial College School of Medicine, London, UK. m.al-obaidi@rbh.nthames.nhs.uk
Circulation
|February 2, 2000
Resumen
Los niveles elevados de homocisteína en pacientes con síndrome coronario agudo (SAA) se correlacionan con un aumento de los marcadores de generación de trombina. Este estudio demuestra un vínculo entre la homocisteína y la actividad protrombótica en ACS, ofreciendo una posible explicación de sus efectos clínicos.
Área de la Ciencia:
- Medicina Cardiovascular La medicina cardiovascular es una especialidad de la salud.
- Hematología Hematología.
- La bioquímica es la bioquímica.
Sus antecedentes:
- Estudios previos sugieren que la homocisteína promueve la generación de trombina.
- Este efecto protrombótico no se ha demostrado previamente en pacientes con síndromes coronarios agudos (SAC).
Objetivo del estudio:
- Investigar la asociación entre los niveles plasmáticos de homocisteína y los marcadores de la generación de trombina en pacientes que presentan ACS.
- Para determinar si la homocisteína contribuye al estado protrombótico observado en ACS.
Principales métodos:
- Se reclutaron 117 pacientes con SCA (infarto agudo de miocardio o angina de pecho inestable) y 18 pacientes de control.
- La homocisteína plasmática, el Factor VIIa y el fragmento de protrombina F1 + 2 se midieron utilizando cromatografía líquida de alto rendimiento y ELISA.
- Las correlaciones entre estos marcadores se analizaron en ACS y grupos de control.
Principales resultados:
- Los pacientes con SCA mostraron elevados fragmentos de protrombina F1+2 y Factor VIIa en comparación con los controles.
- Los niveles más altos de homocisteína en pacientes con SCA se asociaron con aumentos graduales en F1 + 2 y Factor VIIa.
- Se encontraron correlaciones positivas significativas entre la homocisteína y F1 + 2, la homocisteína y el factor VIIa, y F1 + 2 y el factor VIIa en pacientes con SCA.
Conclusiones:
- La homocisteína plasmática elevada se asocia significativamente con el aumento de los marcadores de generación de trombina en pacientes con SCA.
- Estos hallazgos sugieren que la homocisteína puede desempeñar un papel causal en el efecto protrombótico observado en ACS.
- Este estudio proporciona un mecanismo potencial que explica el impacto protrombótico de la homocisteína en el contexto de los síndromes coronarios agudos.
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