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Molecular Characterization of the t(8; 13)(p11;q12) Translocation Associated With an Atypical Myeloproliferative Disorder: Evidence for Three Discrete Loci Involved in Myeloid Leukemias on 8p11
Ivan H. Still,
Olga Chernova,
David Hurd,
Richard M. Stone, and
John K. Cowell
From the Department of Neurosciences, Cleveland Clinic Foundation, Cleveland, OH; Bowman Gray School of Medicine, Winston-Salem, NC; and Dana-Farber Cancer Institute, Boston MA.
A reciprocal chromosome translocation between 13q12 and 8p11 is the consistent cytogenetic abnormality seen in a nonspecific myeloproliferative disorder that is associated with T-cell leukemia/lymphoma and peripheral blood eosinophilia. Detailed molecular analyses of the translocation breakpoints associated with this rearrangement have not been reported to date. We have now generated somatic cell hybrids from a newly described patient with this specific structural rearrangement and analyzed the breakpoints on the derivative chromosomes. We have shown that the breakpoint on chromosome 13 lies within a 300- to 500-kb region defined by the KIAA177 gene and D13S1123 marker. In addition, we have identified a 1.2-Mb YAC, 959A4, that crosses the translocation breakpoint on the short arm of chromosome 8 in this patient. The location of this breakpoint in 8p11 is distinct from the t(8; 16) and t(8; 22) translocations associated with M4/M5 myeloid leukemias, and suggests that three distinct loci located within 8p11 are involved in the pathogenesis of myeloid neoplasias.
Blood, Vol. 90 No. 8 (July 15), 1997:
pp. 3136-3141
© 1997 by The American Society of Hematology.
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