Abstract:
:Monoclonal B-cell lymphocytosis (MBL) with normal lymphocyte counts is associated with decreased numbers of normal circulating B-cell subsets.Little is known about the distribution of normal lymphoid cells and their subsets in the peripheral blood (PB) of subjects with monoclonal B-cell lymphocytosis (MBL). In our study, we compared the absolute number of PB lymphoid cells and their subpopulations in 95 MBL cases with normal lymphocyte counts vs. 617 age-/sex-matched non-MBL healthy subjects (controls), using highly sensitive flow cytometry. MBL cases showed significantly reduced numbers of normal circulating B-cells, at the expense of immature and naive B-cells; in addition, CD4+CD8+ double-positive T-cells and CD8+ T-cells were significantly lower and higher vs. controls, respectively. Moreover, most normal B-cell subsets were significantly decreased in PB at >1% MBL-counts, vs. "low-count" MBL cases, and lower amounts of immature/naive B-cells were detected in biclonal (particularly in cases with coexisting CLL-like- and non-CLL-like B-cell clones) vs. monoclonal MBL subjects. In summary, our results show imbalanced (reduced) absolute numbers of recently produced normal circulating B-cells (e.g., immature and naıve B-cells) in MBL, which becomes more pronounced as the MBL cell count increases.
journal_name
Am J Hematoljournal_title
American journal of hematologyauthors
Hauswirth AW,Almeida J,Nieto WG,Teodosio C,Rodriguez-Caballero A,Romero A,López A,Fernandez-Navarro P,Vega T,Perez-Andres M,Valent P,Jäger U,Orfao A,Primary Health Care Group of Salamanca for Study of MBL.doi
10.1002/ajh.23214subject
Has Abstractpub_date
2012-07-01 00:00:00pages
721-4issue
7eissn
0361-8609issn
1096-8652journal_volume
87pub_type
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