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How MYC promotes the development of cancer remains to be fully understood. Here, we report that the Zn(2+)-finger transcription factor ASCIZ (ATMIN, ZNF822) synergizes with MYC to activate the expression of dynein light chain (DYNLL1, LC8) in the murine Eμ-Myc model of lymphoma. Deletion of Asciz or Dynll1 prevented the abnormal expansion of pre-B cells in pre-cancerous Eμ-Myc mice and potentiated the pro-apoptotic activity of MYC in pre-leukemic immature B cells. Constitutive loss of Asciz or Dynll1 delayed lymphoma development in Eμ-Myc mice, and induced deletion of Asciz in established lymphomas extended the survival of tumor-bearing mice. We propose that ASCIZ-dependent upregulation of DYNLL1 levels is essential for the development and expansion of MYC-driven lymphomas by enabling the survival of pre-neoplastic and malignant cells.
Pubmed ID: 26832406
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