Abstract
In the hematopoietic system, menin was found to interact with MLL, a large protein encoded by the mixed linage leukemia gene that acts as a histone H3 methyltransferase. The MLL gene is a recurrent target for translocations in both acute myeloid and acute lymphoid leukemias. MLL gene rearrangements involve a variety of translocation partners, giving rise to MLL fusion proteins whose transforming ability is mediated through upregulated expression of Homeobox (Hox) genes as well as other targets. Recent work indicates that menin is an essential partner of MLL fusion proteins in leukemic cells and that it regulates normal hematopoiesis. In the absence of menin, steady-state hematopoiesis is largely preserved; however, menin-deficient hematopoietic stem cells are markedly deficient in situations of hematopoietic stress, such as during recovery after bone marrow transplantation. In leukemias driven by MLL fusion proteins, menin is essential for transformation and growth of the malignant cells. Thus, menin-MLL interactions represent a promising therapeutic target in leukemias with MLL rearrangements.
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Maillard, I., Hess, J.L. (2009). The Role of Menin in Hematopoiesis. In: Balogh, K., Patocs, A. (eds) SuperMEN1. Advances in Experimental Medicine and Biology, vol 668. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-1664-8_5
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