B lymphocyte subsets and their functional activity in the early months of life.

Abstract:

:In the present study we evaluated B-cell subsets and their functional development in 74 newborns from birth to 6 months of life. Moreover, we evaluated natural antibody production in vitro. The results documented a predominance of naive B-lymphocytes at all time-points evaluated, decreasing from birth to 6 months (p=0.009). The percentages of CD27+IgD+ and CD27+IgDneg memory B-cells were very low at birth and significantly increased only at 6 months (p=0.02 and p less than 0.001, respectively). We found a significant increase only in in vitro stimulated IgG production at 6 months as compared to birth (p less than 0.001). Moreover, a lower secretion of anti-Pn IgM antibodies up to 6 months of age, as compared to controls was observed. Our results underline that the susceptibility and severe course of infection in the neonate can be attributed, at least in part, to the lack of pre-existing immunological memory and competent adaptive immunity.

authors

Avanzini MA,Maccario R,Belloni C,Carrera G,Bertaina A,Cagliuso M,La Rocca M,Valsecchi C,Mantelli M,Castellazzi AM,Quinti I,De Silvestri A,Marconi M

doi

10.1177/039463201002300122

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

247-54

issue

1

eissn

0394-6320

issn

2058-7384

pii

22

journal_volume

23

pub_type

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