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Inversión de la patología en la mucopolisacaridosis murina tipo VII por transferencia génica de células somáticas
J H Wolfe1, M S Sands, J E Barker
1Jackson Laboratory, Bar Harbor, Maine 04609.
Nature
|December 24, 1992
Resumen
La terapia génica que utiliza vectores retrovirales corrige parcialmente el síndrome de Sly en ratones al permitir la expresión de beta-glucuronidasa a largo plazo y de bajo nivel en las células madre, mejorando el almacenamiento lisosomal.
Área de la Ciencia:
- Genética La genética.
- La bioquímica es la bioquímica.
- Biología Molecular Biología Molecular
Sus antecedentes:
- La mucopolisacaridosis VII (síndrome de Sly) es una deficiencia hereditaria de beta-glucuronidasa que causa enfermedad de almacenamiento lisosomal.
- La enfermedad conduce a una degeneración progresiva y una esperanza de vida reducida, particularmente en ratones afectados.
- El trasplante de médula ósea ofrece una corrección parcial a través del reemplazo de enzimas, extendiendo la vida útil.
Objetivo del estudio:
- Para investigar la eficacia de la terapia génica para el síndrome de Sly.
- Para determinar si la transferencia de genes mediada por el vector retroviral en células madre hematopoyéticas puede corregir la enfermedad.
- Para evaluar la expresión a largo plazo y los efectos terapéuticos del gen beta-glucuronidasa in vivo.
Principales métodos:
- Transferencia mediada por vectores retrovirales del gen beta-glucuronidasa en células madre hematopoyéticas de ratón mutante.
- Monitoreo a largo plazo de la expresión génica y la actividad enzimática en ratones tratados.
- Evaluación del almacenamiento lisosómico en los órganos afectados (hígado, bazo).
Principales resultados:
- Expresión exitosa a largo plazo de bajos niveles de beta-glucuronidasa de genes transferidos por vectores en células madre hematopoyéticas.
- Se observó una corrección parcial del síndrome de Sly en ratones tratados.
- Reducción significativa en el almacenamiento lisosómico de glicosaminoglicanos en el hígado y el bazo.
Conclusiones:
- La terapia génica a través de la transferencia retroviral mediada por vectores es un enfoque viable para el síndrome de Sly.
- La expresión sostenida y de bajo nivel de la beta-glucuronidasa puede mejorar parcialmente el fenotipo de la enfermedad.
- Este enfoque ofrece una alternativa potencial al trasplante de médula ósea para el tratamiento de trastornos de almacenamiento lisosomal.
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