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El mapeo de la red de proteínas NPHP-JBTS-MKS revela genes y vías de la enfermedad de la ciliopatía
Liyun Sang1, Julie J Miller, Kevin C Corbit
1Genentech Inc., South San Francisco, CA 94080, USA.
Cell
|May 14, 2011
Resumen
Este estudio identifica nuevos genes y vías involucradas en ciliopatías como las síndromes de nefronoftisis (NPHP), Joubert (JBTS) y Meckel-Gruber (MKS). Los hallazgos vinculan módulos de proteínas específicas con defectos renales, retinianos y neuronales, avanzando en nuestra comprensión de estos complejos trastornos genéticos.
Área de la Ciencia:
- Genética La genética.
- Biología Molecular Biología Molecular
- Biología del desarrollo Biología del desarrollo.
Sus antecedentes:
- Las síndromes de nefronoftisis (NPHP), Joubert (JBTS) y Meckel-Gruber (MKS) son ciliopatías con síntomas superpuestos que incluyen riñones quísticos, degeneración de la retina y defectos del tubo neural.
- Las vías precisas (ciliar, erizo, polaridad celular) subyacentes a las patologías renales, retinianas y neuronales en estos síndromes siguen siendo incompletamente entendidas.
Objetivo del estudio:
- Aclarar los mecanismos y vías moleculares involucrados en NPHP, JBTS y MKS mediante la integración de la proteómica y la genética humana.
- Identificar nuevos genes y comprender las relaciones funcionales entre los interactores de proteínas en las ciliopatías.
Principales métodos:
- Proteómica de alta confianza para identificar los interactores de nueve proteínas NPHP/JBTS/MKS.
- Análisis de las redes de interacción de proteínas para definir módulos funcionales.
- Ensayos de ciliogénesis y cultivo renal 3D para estudiar la morfogénesis epitelial.
- Análisis de enlace y secuenciación en 250 pacientes, y modelos de knockout en ratones.
Principales resultados:
- Se identificaron tres módulos de proteínas conectadas: "NPHP1-4-8" (superficie apical), "NPHP5-6" (centrosomas) y "MKS" (señalización del erizo).
- Defectos de la organización apical vinculados a la enfermedad quística renal y defectos de la vía ciliar / Hedgehog a los déficits neuronales / retinianos.
- Descubrieron ATXN10 y TCTN2 como nuevos genes NPHP-JBTS; los ratones knockout de Tctn2 exhibieron defectos de señalización del tubo neural y del erizo.
Conclusiones:
- El estudio integra con éxito las redes proteómicas y la genética humana para descubrir vías críticas de enfermedad en ciliopatías.
- Los módulos y vías de proteínas específicas están involucrados diferencialmente en las manifestaciones renales, retinianas y neuronales de NPHP, JBTS y MKS.
- La identificación de nuevos genes y conocimientos mecanicistas proporcionan una base para futuras investigaciones y posibles estrategias terapéuticas para las ciliopatías.
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