alexa Cytogenetic studies on prolymphocytic leukemia. II. T cell prolymphocytic leukemia.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): BritoBabapulle V, Pomfret M, Matutes E, Catovsky D

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Abstract We report chromosome abnormalities in 15 cases of T cell prolymphocytic leukemia (T-PLL). All cases were characterized by clinical, morphological, and membrane marker analysis. The most frequent abnormality was an inv(14)(q11q32) observed in nine cases. The T cell receptor (TCR) alpha chain gene is localized to 14q11 and the immunoglobulin heavy-chain gene to region 14q32. Four cases also had translocations involving 14q11. Trisomy or multisomy for 8q resulting from an i(8q) or from rearrangements with 8p12 as the breakpoint was observed in nine cases, and a deletion of 6q was found in four cases. Trisomy or partial trisomy for 7q was observed in four cases, of which two had abnormalities of band 7q35 to which the TCR beta chain gene is mapped. The expression of Tac antigen, investigated in 27 cases of human T cell leukemia virus I-negative chronic T cell leukemia, which included the 15 cases of T-PLL, showed a good correlation with abnormalities of 7q35. Our studies on chronic T leukemias suggest that inv(14)(q11q32) and trisomy for 8q are abnormalities characteristic of T-PLL.
This article was published in Blood and referenced in Journal of Antivirals & Antiretrovirals

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