C-Myc is one of the most common targets of genetic alterations in human cancers. Although overexpression of c-Myc in the B cell compartment predisposes to lymphomas, secondary mutations are required for disease manifestation. In this article, we show that genetic deficiencies causing arrested B cell development and accumulation of B cell progenitors lead to accelerated lymphomagenesis in Eμ c-myc transgenic mice. This result suggests that B cell progenitors are more prone than their mature counterparts to developing secondary oncogenic lesions that complement c-Myc in promoting transformation. To investigate the nature of these oncogenic lesions, we examined Eμ c-myc mice deficient in mismatch repair function. We report that Msh2 G674A/G674A Eμ c-myc and Msh2G674A/G674A Eμ c-myc mice rapidly succumb to pro-B cell stage lymphomas, indicating that Msh2-dependent mismatch repair function actively suppresses c-Myc-associated oncogenesis during early B cell development.
|Original language||English (US)|
|Number of pages||6|
|Journal||Proceedings of the National Academy of Sciences of the United States of America|
|State||Published - Nov 3 2009|
- Mismatch repair
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