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Transformación bioquímica de células de ratón por fragmentos de virus del herpes simple ADN ADN
Cell
|May 1, 1977
Resumen
Las células de ratón con deficiencia de timidina quinasa (TK) fueron diseñadas para expresar TK viral funcional mediante la introducción de fragmentos de ADN HSV2. Este estudio mapeó con éxito el gen TK en el genoma del HSV.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Virología Virología.
- Genética La genética.
Sus antecedentes:
- Las células L de ratón carecen de timidina quinasa (TK), presentando un modelo para la manipulación genética.
- El virus del herpes simplex tipo 2 (HSV2) codifica una enzima llamada timidina quinasa (TK).
Objetivo del estudio:
- Para determinar si el ADN HSV2 fragmentado puede conferir un fenotipo TK-positivo (TK+) a las células de ratón con deficiencia de TK.
- Para mapear la ubicación del gen HSV2 TK en el genoma viral.
Principales métodos:
- Infección de células LMTK- de ratón con ADN HSV2 fragmentado (Eco RI, Hind III, o cortado mecánicamente).
- Selección de células TK+ utilizando el medio HAT.
- Análisis de la actividad de TK a través de la termolabilidad y la electroforesis en gel de poliacrilamida.
- Pruebas de inmunofluorescencia para detectar antígenos específicos del HSV.
Principales resultados:
- Las células transformadas adquirieron un fenotipo TK+, exhibiendo actividad TK específica del virus.
- La actividad de TK en las células transformadas fue idéntica a la de las células infectadas líticamente con HSV2.
- Las células transformadas mostraron inmunofluorescencia específica del HSV.
Conclusiones:
- El ADN HSV2 fragmentado puede transformar las células de ratón en un fenotipo TK+.
- La ubicación del gen HSV2 TK en el genoma viral se puede mapear en base a estos estudios de transformación.
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