title: Cytokine-dependent imatinib resistance in mouse BCR-ABL+, Arf-null lymphoblastic leukemia.
abstract: Retroviral transduction of the BCR-ABL kinase into primary mouse bone marrow cells lacking the Arf tumor suppressor rapidly generates polyclonal populations of continuously self-renewing pre-B cells, virtually all of which have leukemic potential. Intravenous infusion of 20 such cells into healthy syngeneic mice induces rapidly fatal, transplantable lymphoblastic leukemias that resist imatinib therapy. Introduction of BCR-ABL into Arf-null severe combined immunodeficient (SCID) bone marrow progenitors lacking the cytokine receptor common gamma-chain yields leukemogenic pre-B cells that exhibit greater sensitivity to imatinib in vivo. Hence, salutary cytokines in the hematopoietic microenvironment can facilitate leukemic proliferation and confer resistance to targeted therapy.
authors.affiliation: Department of Oncology, St Jude Children's Research Hospital, Memphis, TN 38105, USA.
authors.forename: Richard T
authors.initials: RT
authors.lastname: Williams
authors.forename: Willem
authors.initials: W
authors.lastname: den Besten
authors.forename: Charles J
authors.initials: CJ
authors.lastname: Sherr
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000627:therapeutic use; D001549:Benzamides; D019941:Cyclin-Dependent Kinase Inhibitor p16 / Q000235:genetics* / Q000502:physiology; D016207:Cytokines / Q000494:pharmacology*; D019008:Drug Resistance, Neoplasm / Q000187:drug effects* / Q000235:genetics; D016044:Fusion Proteins, bcr-abl / Q000235:genetics*; D006412:Hematopoietic Stem Cells / Q000473:pathology; D000068877:Imatinib Mesylate; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D016513:Mice, SCID; D008954:Models, Biological; D009368:Neoplasm Transplantation / Q000473:pathology; D010879:Piperazines / Q000627:therapeutic use*; D054198:Precursor Cell Lymphoblastic Leukemia-Lymphoma / Q000188:drug therapy* / Q000235:genetics*; D011743:Pyrimidines / Q000627:therapeutic use*; D017211:Treatment Failure
chemical_list: D000970:Antineoplastic Agents; D001549:Benzamides; C417743:Cdkn2a protein, mouse; D019941:Cyclin-Dependent Kinase Inhibitor p16; D016207:Cytokines; D010879:Piperazines; D011743:Pyrimidines; D000068877:Imatinib Mesylate; D016044:Fusion Proteins, bcr-abl