title: Establishment of human acute myelogenous leukemia lines secreting interleukin-1 beta in SCID mice.
abstract: A reproducible in vivo model of human acute myelogenous leukemia (AML) was established in severe combined immunodeficient (SCID) mice. The AML-CL and AML-PS lines were originated from leukemic blasts purified respectively from the peripheral blood of a 27-year-old woman with previously untreated hyperleukocytotic AML and from the bone marrow of a 61-year-old man during the third leukemic relapse. The 2 lines were maintained and serially transplanted i.p. in SCID mice. AML-PS and AML-CL produced ascitogenous gross tumors after approximately 4 and 6 weeks, respectively, and all mice died within 6-8 weeks. Microscopic evaluation of different organs at autopsy showed massive involvement of bone marrow, liver and spleen, though with differences in the tumor burdens for the 2 lines (AML-CL > AML-PS). Flow cytometric analysis documented the spread of leukemic cells to bone marrow, peripheral blood and spleen. AML-PS and AML-CL cells show an immunophenotypic profile (CD13+, CD33+) and cytogenetic findings similar to freshly isolated blasts. Interleukin-1 beta (IL-1 beta) gene expression was observed by Northern blot analysis in leukemic cells from AML-CL and AML-PS SCID mice. After 24 hr of culture both lines released IL-1 beta in culture supernatants. High levels of circulating IL-1 beta were secreted in plasma of tumor-bearing mice. This AML-SCID murine model could contribute to an understanding of the mechanisms of AML growth in vivo and the possible role of the autocrine production of IL-1 beta in promoting cell growth.
authors.affiliation: Istituto di Ricerche Farmacologiche Mario Negri, Bergamo, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Giavazzi
authors.forename: C
authors.initials: C
authors.lastname: Di Berardino
authors.forename: A
authors.initials: A
authors.lastname: Garofalo
authors.forename: T
authors.initials: T
authors.lastname: Motta
authors.forename: A
authors.initials: A
authors.lastname: Gobbi
authors.forename: E
authors.initials: E
authors.lastname: Scanziani
authors.forename: G
authors.initials: G
authors.lastname: Giudici
authors.forename: M
authors.initials: M
authors.lastname: Galli
authors.forename: J G
authors.initials: JG
authors.lastname: Mayo
authors.forename: T
authors.initials: T
authors.lastname: Barbui
mesh_terms: D000328:Adult; D000818:Animals; D002455:Cell Division / Q000187:drug effects; D005260:Female; D015870:Gene Expression; D006801:Humans; D007375:Interleukin-1 / Q000097:blood / Q000235:genetics / Q000378:metabolism*; D015470:Leukemia, Myeloid, Acute / Q000097:blood / Q000473:pathology* / Q000503:physiopathology*; D008297:Male; D051379:Mice; D016513:Mice, SCID / Q000378:metabolism*; D008875:Middle Aged; D009368:Neoplasm Transplantation; D014407:Tumor Cells, Cultured
chemical_list: D007375:Interleukin-1