MLL translocations, histone modifications and leukaemia stem-cell development - PubMed (original) (raw)

Review

doi: 10.1038/nrc2253.

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Review

MLL translocations, histone modifications and leukaemia stem-cell development

Andrei V Krivtsov et al. Nat Rev Cancer. 2007 Nov.

Abstract

Translocations that involve the mixed lineage leukaemia (MLL) gene identify a unique group of acute leukaemias, and often predict a poor prognosis. The MLL gene encodes a DNA-binding protein that methylates histone H3 lysine 4 (H3K4), and positively regulates gene expression including multiple Hox genes. Leukaemogenic MLL translocations encode MLL fusion proteins that have lost H3K4 methyltransferase activity. A key feature of MLL fusion proteins is their ability to efficiently transform haematopoietic cells into leukaemia stem cells. The link between a chromatin modulator and leukaemia stem cells provides support for epigenetic landscapes as an important part of leukaemia and normal stem-cell development.

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