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.
journal_name
Int J Immunopathol Pharmacolauthors
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 Mdoi
10.1177/039463201002300122subject
Has Abstractpub_date
2010-01-01 00:00:00pages
247-54issue
1eissn
0394-6320issn
2058-7384pii
22journal_volume
23pub_type
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