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IntroductionThe mitral valve, one of the heart's four valves, regulates blood flow. These valves have flaps that open and close to direct blood properly through the heart and body. During each heartbeat, the flaps open for blood to pass through and seal shut to prevent backflow. Specifically, the mitral valve opens to allow blood flow from the heart's upper left chamber to the lower left chamber. It then closes securely as the lower left chamber contracts to pump blood to the body, preventing...
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Mitral Stenosis I: Introduction01:22

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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
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Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
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Las mutaciones en DCHS1 causan prolapso de la válvula mitral

Ronen Durst1,2, Kimberly Sauls3, David S Peal4

  • 1Center for Human Genetic Research, Massachusetts General Hospital Research Institute and Department of Neurology, Harvard Medical School, 185 Cambridge Street, Boston, Massachusetts 02114 USA.

Nature
|August 11, 2015
PubMed
Resumen

Las mutaciones genéticas en el gen DCHS1 están relacionadas con el prolapso de la válvula mitral no-sindrómica (MVP). Este descubrimiento arroja luz sobre las causas genéticas de MVP y ofrece objetivos terapéuticos potenciales para esta afección cardíaca común.

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Área de la Ciencia:

  • La genética
  • Cardiología
  • Biología del desarrollo

Sus antecedentes:

  • El prolapso de la válvula mitral (MVP) es una afección cardíaca prevalente, a menudo hereditaria, pero su base genética sigue sin estar clara.
  • MVP es una de las principales causas de regurgitación mitral y posterior cirugía de la válvula mitral.

Objetivo del estudio:

  • Identificar la etiología genética del prolapso de la válvula mitral no síndroma.

Principales métodos:

  • Secuenciación completa del exoma en una familia multigeneracional con MVP.
  • Estudios funcionales en peces cebra, cultivos celulares y modelos de ratón.
  • Análisis de las células intersticiales de la válvula mitral (CIVM) de pacientes y modelos de ratón.

Principales resultados:

  • Se identificó una mutación de error en el gen DCHS1 y se segregó con MVP en la familia inicial.
  • Dos familias adicionales mostraron segregación de diferentes mutaciones dañinas de DCHS1 con MVP.
  • Se encontró que las mutaciones de DCHS1 reducen la estabilidad de las proteínas y causan defectos cardíacos en peces cebra y ratones, afectando el desarrollo de la válvula mitral y la función de MVIC.

Conclusiones:

  • Las mutaciones de DCHS1 son una causa significativa de prolapso de la válvula mitral no síndroma.
  • Las alteraciones en DCHS1 afectan a la morfogénesis de la válvula mitral, la migración de MVIC y el patrón celular.
  • La comprensión del papel de DCHS1 en la patogénesis de MVP puede conducir a nuevas estrategias terapéuticas.