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The number of cytomegalovirus-specific CD4+ T cells is markedly expanded in patients with B-cell chronic lymphocytic leukemia and determines the total CD4+ T-cell repertoire

Pourgheysari, Batoul, Bruton, Rachel, Parry, Helen, Billingham, Lucinda, Fegan, Christopher Daniel, Murray, Jim and Moss, Paul 2010. The number of cytomegalovirus-specific CD4+ T cells is markedly expanded in patients with B-cell chronic lymphocytic leukemia and determines the total CD4+ T-cell repertoire. Blood 116 (16) , pp. 2968-2974. 10.1182/blood-2009-12-257147

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Abstract

B-cell chronic lymphocytic leukemia is associated with immune suppression and an altered T-cell repertoire with expansion of memory cells. Cytomegalovirus (CMV) is a common herpes virus that elicits a strong virus-specific T-cell immune response after infection. We studied the CMV-specific CD4+ T-cell response in 45 patients and 35 control subjects and demonstrated that it was markedly expanded in the patient group, averaging 11% of the CD4+ pool compared with 4.7% in controls. The magnitude of the CMV-specific CD4+ immune response increased with disease stage and was particularly high in patients who received chemotherapy. Within this group, the CMV-specific response comprised over 46% of the CD4+ T-cell repertoire in some patients. Serial analysis revealed that CMV-specific immunity increased during treatment with chemotherapy and remained stable thereafter. CMV-seropositive patients exhibited a markedly altered CD4+ T-cell repertoire with increased numbers of CD45R0+ T cells and a reduction in CD27, CD28, and CCR7 expression. Overall survival was reduced by nearly 4 years in CMV-seropositive patients, although this did not reach statistical significance. CLL patients therefore demonstrate an expansion of the CD4+ CMV-specific immune response, which is likely to contribute to the immunological and clinical features of this disease.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Subjects: Q Science > QH Natural history > QH426 Genetics
R Medicine > RC Internal medicine > RC0254 Neoplasms. Tumors. Oncology (including Cancer)
Publisher: American Society of Hematology
ISSN: 0006-4971
Last Modified: 04 Jun 2017 04:52
URI: http://orca.cf.ac.uk/id/eprint/45983

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