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- W2106513319 abstract "Neoplastic cells of Hodgkin lymphoma (HL) originating from germinal or postgerminal center B cells lose their capacity to transcribe and to express surface immunoglobulins (Ig). This defect correlates with the absence of expression of B-cell-specific transcription regulators, including PU.1, BOB1, and OCT2. These findings suggest that Ig impairment in HL is caused by the defective transcription machinery. The mechanism or mechanisms underlying failure of Hodgkin cells to express PU.1, BOB1, and OCT2 remain unclear. The genes encoding for these three respective transcription factors have been mapped at 11p11.2 (SPI1), 11q23.1 (POU2AF1), and 19q13.2 (POU2F2); these are chromosomes recurrently affected in HL. To check the genomic status of PU.1, BOB1, and OCT2 in HL, we performed metaphase fluorescence in situ hybridization (FISH) analysis of 10 HL cases using locus-specific bacterial artificial chromosome clones. FISH signal pattern was correlated with the ploidy level of each analyzed cell and showed recurrent imbalances of the studied loci. The underrepresentation of one or two analyzed regions was detected in five cases; the remaining five cases showed either random losses, a ploidy-equivalent FISH pattern, or overrepresented signals. Neither a constant loss nor genomic aberration of at least one of these genes could be observed in studied cases. These findings indicate that genomic imbalances or rearrangements are not a cause of PU.1, BOB1, and OCT2 deficiency in cHL and argue for another mechanism underlying this phenomenon." @default.
- W2106513319 created "2016-06-24" @default.
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- W2106513319 date "2005-04-01" @default.
- W2106513319 modified "2023-09-23" @default.
- W2106513319 title "Alterations of loci encoding PU.1, BOB1, and OCT2 transcription regulators do not correlate with their suppressed expression in Hodgkin lymphoma" @default.
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- W2106513319 doi "https://doi.org/10.1016/j.cancergencyto.2004.09.005" @default.
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