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Methods to Discover Alternative Promoter Usage and Transcriptional Regulation of Murine Bcrp1
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La expresión de v-src y c-src de pollo en células de rata demuestra diferencias cualitativas entre pp60v-src y
Cell
|May 1, 1984
Resumen
Los niveles elevados de la proteína src celular (pp60c-src) no causan cáncer. Sin embargo, la proteína viral src (pp60v-src) puede inducir el crecimiento neoplásico, destacando las diferencias entre estos oncogenes relacionados.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Biología celular Biología celular.
- La oncogénesis es la oncogénesis.
Sus antecedentes:
- El oncogén retroviral v-src se origina en el gen celular c-src.
- La similitud estructural sugiere que c-src también podría poseer potencial oncogénico.
Objetivo del estudio:
- Investigar el potencial oncogénico del gen src celular (c-src).
- Para comparar las capacidades de transformación de pp60c-src y pp60v-src.
Principales métodos:
- Construcción de un plásmido quimérico para la expresión c-src de pollo.
- Transfección de células de rata-2 con el ADN quimérico para crear una línea celular con pp60c-src elevado.
- Comparación de los niveles de expresión de proteínas src celulares y virales y los fenotipos celulares.
Principales resultados:
- Las líneas celulares de ratas con 10 veces los niveles normales de pp60c-src se mantuvieron fenotípicamente normales, conservando cables de actina y no mostrando crecimiento de agar blando.
- pp60c-src se produjo en niveles que exceden el umbral de transformación de pp60v-src.
- Transfección con transformación inducida por v-src en líneas celulares pp60c-src normales y elevadas, caracterizadas por morfología redondeada, actina interrumpida y crecimiento de agar blando.
Conclusiones:
- La sobreexpresión de pp60c-src por sí sola no induce la transformación celular.
- El oncogén viral pp60v-src posee una potente actividad transformadora distinta de su contraparte celular.
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