PMID- 11133737 OWN - NLM STAT- MEDLINE DCOM- 20010215 LR - 20210216 IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 97 IP - 1 DP - 2001 Jan 1 TI - The src homology 2 domain of Bcr/Abl is required for efficient induction of chronic myeloid leukemia-like disease in mice but not for lymphoid leukemogenesis or activation of phosphatidylinositol 3-kinase. PG - 4-13 AB - The effect of mutations in the Src homology 2 (SH2) domain of the BCR/ABL oncogene on leukemogenesis was tested in a quantitative murine bone marrow transduction/transplantation assay that accurately models human Philadelphia-positive B-lymphoid leukemia and chronic myeloid leukemia (CML). The SH2 domain was not required for induction of B-lymphoid leukemia in mice by BCR/ABL. Under conditions where the p190 and p210 forms of BCR/ABL induce fatal CML-like myeloproliferative disease within 4 weeks, p210 SH2 mutants induced CML-like disease in some mice only after a significant delay, with other recipients succumbing to B-lymphoid leukemia instead. In contrast, p190 BCR/ABL SH2 point and deletion mutants rapidly induced CML-like disease. These results provide the first direct evidence of significant differences in cell signaling by the Bcr/Abl tyrosine kinase between these distinct leukemias. Contrary to previous observations, high levels of phosphatidylinositol 3-kinase (PI 3-kinase) activity in primary malignant lymphoblasts and myeloid cells from recipients of marrow transduced with the BCR/ABL SH2 mutants were found. Hence, the decreased induction of CML-like disease by the p210 BCR/ABL SH2 mutants is not due to impaired activation of PI 3-kinase. FAU - Roumiantsev, S AU - Roumiantsev S AD - Center for Blood Research, Department of Genetics, Harvard Medical School, Boston, MA 02115, USA. FAU - de Aos, I E AU - de Aos IE FAU - Varticovski, L AU - Varticovski L FAU - Ilaria, R L AU - Ilaria RL FAU - Van Etten, R A AU - Van Etten RA LA - eng GR - CA57593/CA/NCI NIH HHS/United States GR - CA94536/CA/NCI NIH HHS/United States GR - HL03310/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Blood JT - Blood JID - 7603509 RN - 0 (Interleukin-3) RN - 21820-51-9 (Phosphotyrosine) RN - EC 2.7.1.- (Phosphatidylinositol 3-Kinases) RN - EC 2.7.10.2 (Fusion Proteins, bcr-abl) SB - IM MH - Animals MH - Bone Marrow Cells/drug effects/enzymology MH - Cell Line/drug effects MH - Cell Transformation, Neoplastic/drug effects MH - Disease Models, Animal MH - Enzyme Activation/drug effects MH - Female MH - Fusion Proteins, bcr-abl/genetics/metabolism/*pharmacology MH - Interleukin-3/pharmacology MH - Leukemia, B-Cell/etiology MH - Leukemia, Experimental/enzymology/etiology MH - Leukemia, Myelogenous, Chronic, BCR-ABL Positive/enzymology/*etiology MH - Male MH - Mice MH - Mice, Inbred BALB C MH - Myeloid Cells/enzymology MH - Phosphatidylinositol 3-Kinases/drug effects/metabolism MH - Phosphorylation MH - Phosphotyrosine/metabolism MH - Point Mutation MH - Precursor Cell Lymphoblastic Leukemia-Lymphoma/enzymology MH - Protein Binding MH - Signal Transduction MH - Stem Cells/drug effects/enzymology MH - src Homology Domains/genetics/*physiology EDAT- 2001/01/03 11:00 MHDA- 2001/03/03 10:01 CRDT- 2001/01/03 11:00 PHST- 2001/01/03 11:00 [pubmed] PHST- 2001/03/03 10:01 [medline] PHST- 2001/01/03 11:00 [entrez] AID - S0006-4971(20)48103-0 [pii] AID - 10.1182/blood.v97.1.4 [doi] PST - ppublish SO - Blood. 2001 Jan 1;97(1):4-13. doi: 10.1182/blood.v97.1.4.