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- W2300924949 abstract "Abstract Patients with the B-cell malignancy hairy cell leukemia (HCL) exhibit a skewed T-cell repertoire with oligoclonal expression or absence of many members of the T-cell receptor (TCR) BV gene families. To evaluate whether interferon-α (IFN-α) therapy would not only restore normal hematopoiesis, but also the abnormal T-cell repertoire, we studied T lymphocytes from a cohort of HCL patients treated by IFN-α in the past, at initiation, and at several intervals up to 6 years of IFN-α treatment. The junctional regions from 22 TCRBV gene families were analyzed after polymerase chain reaction amplification of cDNA (RT-PCR) using family specific primers. In all seven patients improvement of the skewed T-cell repertoire was not seen until 2 years of treatment. It consisted of disappearance of oligoclonal subpopulations and (polyclonal) reappearance of absent TCRBV gene families. The RT-PCR results were correlated with the TCRBV protein expression using TCRBV-specific monoclonal antibodies. T lymphocytes from four patients with active HCL contained large expansions of particular TCRBV-expressing cells (up to 25% of the CD3+cells; 600 to 700/μL whole blood), which decreased during IFN-α therapy in both patients tested. Finally, restoration of the TCR repertoire matched normalization of the functional immune repertoire as measured by proliferative, helper, and cytotoxic T-lymphocyte precursor frequencies against major histocompatibility complex–unrelated individuals. In conclusion, oligoclonal bands of TCRBV gene families found by RT-PCR correspond with a dramatic increase in circulating T lymphocytes expressing the same TCRBV family. Moreover, IFN-α can restore the skewed T-cell repertoire and suppress persistent T-cell clones upon treatment of the accompanying malignancy." @default.
- W2300924949 created "2016-06-24" @default.
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- W2300924949 date "1998-06-01" @default.
- W2300924949 modified "2023-09-28" @default.
- W2300924949 title "Correction of Abnormal T-Cell Receptor Repertoire During Interferon-α Therapy in Patients With Hairy Cell Leukemia" @default.
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- W2300924949 doi "https://doi.org/10.1182/blood.v91.11.4224" @default.
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