Journal
BRITISH JOURNAL OF HAEMATOLOGY
Volume 116, Issue 3, Pages 595-597Publisher
BLACKWELL PUBLISHING LTD
DOI: 10.1046/j.0007-1048.2001.03318.x
Keywords
hairy cell leukaemia; dendritic cells
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Clinical studies in hairy cell leukaemia (HCL) have linked the frequent occurrence of infections due to intracellular pathogens and it profound monocytopenia. More recently, dendritic cells (DC), a subset of which are related to monocytes, were shown to be the professional antigen-presenting cells which stimulate the adaptive immune response. Using membrane markers and flow cytometry, we determined in peripheral blood whether various DC subsets and monocytes were impaired in HCL, Lymphoid and myeloid DC were virtually absent in five HCL patients with active disease. After treatment, both DC and monocytes recovered slowly. The decrease in DC suggests that defective antigen presentation could affect susceptibility to intracellular pathogens in HCL.
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