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- W2011697816 abstract "In this study, we compared the rate of spontaneous apoptosis of B cells from umbilical cord blood with adult B cells and assessed the role of Bcl-2, CD5, interleukin (IL)-4 and B cell-activating factor in B cell spontaneous apoptosis. We found that spontaneous apoptosis of cultured B cells, as assessed by utilizing annexin-V binding, was significantly higher in cord blood than in healthy adult individuals (77.5; 95 CI, 73.5-81.5 versus 59.2; 95 CI, 54-64, respectively, P < 0.0001) and further confirmed by 4' 6-diamidino-2-phenylindole, dihydrochloride (DAPI) staining. Whereas the expression of B cell-activating factor from the tumour necrosis factor family (BAFF) receptor mRNA was similar in B cells from adults and cord blood, we detected lower levels of circulating BAFF in the serum of cord blood (0.68 +/- 0.13 ng versus 1.83 +/- 0.54 ng, P = 0.01). The latter may explain, in part, our observation of lower levels of mean fluorescence intensity of Bcl-2 in cord B cells compared with adults (1.6 +/- 0.9 versus 2.85 +/- 1.3, P = 0.033). CD19(+) CD5(+) B cells from cord blood underwent a lower rate of apoptosis in comparison to CD19(+) CD5(-) B cells (25.1 +/- 9.3%versus 58.5 +/- 12.5%, P < 0.0001). This pattern of sensitivity was comparable in adult blood (15 +/- 5.5%versus 22.7 +/- 9.3%, P = 0.01). Nevertheless, the rate of apoptosis was higher in CD19(+) CD5(+) from cord blood compared to CD19(+) CD5(+) from adults (25.1 +/- 9.3%versus 15 +/- 5.5%, P = 0.0013). The addition of rIL-4 (10 u/ml) to cultured cells decreased B cell apoptosis in a similar fashion in both cord and adults blood. This rescue was strengthened when BAFF (100 microg/ml) was further added. Thus, alterations in Bcl-2 or serum BAFF level may explain the increased rate of cord blood B cell apoptosis." @default.
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- W2011697816 date "2006-07-12" @default.
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- W2011697816 title "Increased susceptibility of cord blood B lymphocytes to undergo spontaneous apoptosis" @default.
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- W2011697816 doi "https://doi.org/10.1111/j.1365-2249.2006.03170.x" @default.
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