Transformation from committed progenitor to leukaemia stem cell initiated by MLL–AF9
| Autor: | Jing Wang, D. Gary Gilliland, Joerg Faber, Yingzi Wang, David Twomey, Scott A. Armstrong, Todd R. Golub, Matthew C. Stubbs, Zhaohui Feng, William C. Hahn, Andrei V. Krivtsov, Jason E. Levine |
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| Rok vydání: | 2006 |
| Předmět: |
Oncogene Proteins
Fusion Cellular differentiation Biology medicine.disease_cause Leukemia Myelomonocytic Acute Cell Line Mice Cancer stem cell medicine Animals Humans Cell Lineage Progenitor cell Leukemia Multidisciplinary Macrophages Cell Differentiation Survival Rate Endothelial stem cell Haematopoiesis Cell Transformation Neoplastic Immunology Neoplastic Stem Cells Cancer research Stem cell Carcinogenesis Reprogramming Cell Division Myeloid-Lymphoid Leukemia Protein Neoplasm Transplantation Granulocytes |
| Zdroj: | Nature. 442:818-822 |
| ISSN: | 1476-4687 0028-0836 |
| Popis: | Leukaemias and other cancers possess a rare population of cells capable of the limitless self-renewal necessary for cancer initiation and maintenance. Eradication of these cancer stem cells is probably a critical part of any successful anti-cancer therapy, and may explain why conventional cancer therapies are often effective in reducing tumour burden, but are only rarely curative. Given that both normal and cancer stem cells are capable of self-renewal, the extent to which cancer stem cells resemble normal tissue stem cells is a critical issue if targeted therapies are to be developed. However, it remains unclear whether cancer stem cells must be phenotypically similar to normal tissue stem cells or whether they can retain the identity of committed progenitors. Here we show that leukaemia stem cells (LSC) can maintain the global identity of the progenitor from which they arose while activating a limited stem-cell- or self-renewal-associated programme. We isolated LSC from leukaemias initiated in committed granulocyte macrophage progenitors through introduction of the MLL-AF9 fusion protein encoded by the t(9;11)(p22;q23). The LSC were capable of transferring leukaemia to secondary recipient mice when only four cells were transferred, and possessed an immunophenotype and global gene expression profile very similar to that of normal granulocyte macrophage progenitors. However, a subset of genes highly expressed in normal haematopoietic stem cells was re-activated in LSC. LSC can thus be generated from committed progenitors without widespread reprogramming of gene expression, and a leukaemia self-renewal-associated signature is activated in the process. Our findings define progression from normal progenitor to cancer stem cell, and suggest that targeting a self-renewal programme expressed in an abnormal context may be possible. |
| Databáze: | OpenAIRE |
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