Primed status of transitional B cells associated with their presence in the cerebrospinal fluid in early phases of multiple sclerosis.

Catalina Lee-Chang, Isabelle Top, Hélène Zéphir, Sylvain Dubucquoi, Jacques Trauet, Patricia Dussart, Lionel Prin, Patrick Vermersch

Université de Lille Nord de France, 1 place de Verdun, Lille Cedex, Lille, France.

Clinical immunology (Orlando, Fla.) 2011 Apr

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In the present study we showed that transitional B cells of patients with clinically isolated syndrome (CIS) and relapsing-remitting multiple sclerosis (RR-MS) are reduced in the peripheral blood (PB) (5.5- and 3.7-fold, respectively). In addition, these cells appeared to up-regulate different integrins (α4 and β1). These observations were associated with a primed cellular status, confirmed by an increased proportion of circulating CD80(+) transitional B cells. Interestingly, these results correlate with presence of transitional B cells in the CSF. Furthermore, these cells were absent in the CSF of individuals with other inflammatory neurological disease, and their levels in paired PB and CD80 expression were normal. Altogether, our data revealed that a differential primed status of transitional B cells is a characteristic feature of early phases of MS disease, and this functional status is associated with the ability of these cells to cross the blood-CSF barrier. Copyright © 2010 Elsevier Inc. All rights reserved.

Citation

Catalina Lee-Chang, Isabelle Top, Hélène Zéphir, Sylvain Dubucquoi, Jacques Trauet, Patricia Dussart, Lionel Prin, Patrick Vermersch. Primed status of transitional B cells associated with their presence in the cerebrospinal fluid in early phases of multiple sclerosis. Clinical immunology (Orlando, Fla.). 2011 Apr;139(1):12-20