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Transduction-Transplantation Mouse Model of Myeloproliferative Neoplasm
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Un oncogén celular se transloca al cromosoma de Filadelfia en la leucemia mielocítica crónica
Nature
|December 23, 1982
Resumen
En la leucemia mielocítica crónica (LMC), el gen celular del virus de la leucemia murina Abelson (c-abl) se transloca desde el cromosoma 9 al cromosoma 22. Este intercambio cromosómico recíproco implica la c-abl en el desarrollo de la LMC.
Área de la Ciencia:
- Biología molecular La biología molecular.
- Genética humana Genética humana es la genética humana.
- Oncología Oncología.
Sus antecedentes:
- Los retrovirus oncogénicos poseen genes transformadores homólogos a los oncogenes celulares.
- El gen humano c-abl, un homólogo de la secuencia de transformación del virus de la leucemia murina de Abelson, reside en el cromosoma 9.
- La translocación del cromosoma de Filadelfia, t(9;22), es característica de la leucemia mielocítica crónica (LMC).
Objetivo del estudio:
- Para determinar si el gen c-abl está involucrado en la translocación del cromosoma de Filadelfia en la LMC.
- Para investigar la ubicación cromosómica precisa de c-abl en relación con la translocación t.
Principales métodos:
- Utilizó las sondas de hibridación c-abl y v-abl.
- Se analizaron híbridos de células somáticas que contenían derivados de la translocación Filadelfia.
- Examinó los patrones de hibridación para mapear las ubicaciones de los genes en relación con las anomalías cromosómicas.
Principales resultados:
- Se observó una hibridación positiva con el derivado 22q- (cromosoma de Filadelfia).
- No se produjo ninguna hibridación positiva con el derivado 9q+ de la translocación.
- Se ha demostrado que las secuencias c-abl están presentes en el cromosoma 22 translocado.
Conclusiones:
- Se concluyó que el gen c-abl se transloca del cromosoma 9 al cromosoma 22 en pacientes con LMC.
- Este hallazgo proporciona evidencia directa de un intercambio cromosómico recíproco.
- Sugiere un papel significativo para el gen c-abl en la patogénesis de la LMC.
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