Abstract：
:Acute promyelocytic leukemia (APL) is characterized by the t(15;17)(q22;q11.2), which results in the PML-RARA fusion gene. In previous studies, we demonstrated that expression of a human PML-RARA complementary DNA in murine granulocyte precursor cells initiated the development of leukemia. However, leukemogenesis by PML-RARA required additional genetic alterations. To identify genetic changes that cooperate with PML-RARA in leukemogenesis, we performed spectral karyotyping analysis of myeloid leukemias from hMRP8-PML-RARA mice (11 cases) and from mice coexpressing PML-RARA and BCL2 (8 cases). Clonal abnormalities were detected in 18 of 19 cases (95%). Recurring numerical abnormalities identified in these murine leukemias included +15 (15 cases, 79%); loss of a sex chromosome (12 cases, 63%); +8 (10 cases, 53%); +10 (9 cases, 47%); +4, +7, or +14 (8 cases each, 42%); +16 (7 cases, 37%); and +6 (5 cases, 26%). In a series of 965 patients with APL, we identified secondary abnormalities in 368 (38%). The most common recurring abnormalities were +8 or partial trisomy of 8q (120 patients, 12.4%) and ider(17) t(15;17) (42 patients, 4.4%). The critical consequence of +8 in human leukemias appears to be the gain of 8q24, which is syntenic to mouse 15. Thus, our results suggest that PML-RARA-initiated murine leukemia is associated with a defined spectrum of genetic changes, and that these secondary mutations recapitulate, in part, the cytogenetic abnormalities found in human APL.
journal_name
Bloodjournal_title
Bloodauthors
Le Beau MM,Bitts S,Davis EM,Kogan SCdoi
10.1182/blood.v99.8.2985subject
Has Abstractpub_date
2002-04-15 00:00:00pages
2985-91issue
8eissn
0006-4971issn
1528-0020journal_volume
99pub_type
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