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La deficiencia de catecol-O-metiltransferasa y 2-metoxioestradiol está asociada con la preeclampsia
Keizo Kanasaki1, Kristin Palmsten, Hikaru Sugimoto
1Division of Matrix Biology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215, USA.
Nature
|May 13, 2008
Resumen
Los ratones que carecían de catecol-O-metiltransferasa (COMT) desarrollaron síntomas de preeclampsia debido a niveles bajos de 2-metoxioestradiol (2-ME). La suplementación con 2-ME revirtió estos síntomas, lo que sugiere su potencial como agente diagnóstico y terapéutico para la preeclampsia.
Área de la Ciencia:
- Biología de la reproducción Biología reproductiva.
- Medicina materna y fetal.
- Genética La genética.
Sus antecedentes:
- La preeclampsia es una complicación del embarazo caracterizada por hipertensión, proteinuria y edema.
- La comprensión actual sugiere que la hipoxia placentaria y el desequilibrio angiogénico (VEGF / PLGF / sFLT-1) contribuyen a los síntomas, pero los mecanismos siguen sin estar claros.
- Las teorías existentes no explican completamente todos los casos de preeclampsia, lo que indica posibles defectos moleculares aguas arriba.
Objetivo del estudio:
- Investigar el papel de la catecol-O-metiltransferasa (COMT) y su metabolito 2-metoxioestradiol (2-ME) en la preeclampsia.
- Para identificar un modelo genético de ratón para la preeclampsia.
- Explorar el potencial diagnóstico y terapéutico del 2-ME en la preeclampsia.
Principales métodos:
- Se generaron ratones preñados con deficiencia de COMT (Comt(-/-)).
- Evaluó el fenotipo de las ratas embarazadas Comt(-/-) en cuanto a las características similares a la preeclampsia.
- Se administró 2-ME a ratones embarazadas y se evaluaron sus efectos sobre los síntomas, la hipoxia placentaria y los marcadores moleculares.
- Los niveles medidos de COMT y 2-ME en mujeres con y sin preeclampsia severa.
Principales resultados:
- Las ratas embarazadas exhibieron un fenotipo similar a la preeclampsia, relacionado con la ausencia de 2-ME.
- La administración de 2-ME mejoró todas las características similares a la preeclampsia en estos ratones sin toxicidad.
- El tratamiento con 2-ME suprimió la hipoxia placentaria, la expresión del factor-1alfa inducible por hipoxia y la elevación de sFLT-1.
- Las mujeres con preeclampsia severa tenían niveles significativamente más bajos de COMT y 2-ME.
Conclusiones:
- La deficiencia en COMT conduce a la reducción de 2-ME, causando un fenotipo similar a la preeclampsia en ratones.
- 2-ME demuestra potencial como un marcador de diagnóstico para la preeclampsia.
- 2-ME puede servir como agente terapéutico para prevenir o tratar la preeclampsia.
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