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- W2034421194 abstract "The ability to engraft human PBMC or fetal tissue immune cells in the severe combined immunodeficient (SCID) mouse has created a need for characterization of these systems and their application to disease models. We demonstrate that SCID mice reconstituted with PBMC support the growth and differentiation of a restricted set of B cells. Human IgG levels of 1-2 mg/ml (10-20% of normal human serum levels) were routinely achieved in spite of a serum half life of only 12 d. Ig levels peaked around 50 d and Ig production was maintained for greater than 100 d. The Ig was greater than 85% IgG though some IgM, IgA, IgD, and even IgE could be detected. However, the human IgG produced in hu-PBL-SCID mice was pauci-clonal when analyzed by isoelectric focusing and by kappa/lambda light chain usage. Using a new polymerase chain reaction based analysis capable of monitoring individual VH family utilization, we found that the engrafted B cells showed skewed and restricted human VH subfamily utilization. These parameters were markedly variable among hu-PBL-SCID mice reconstituted from the same donor cell population at both early (21-50 d) and late stages (greater than 100 d). Hu-PBL/CVI-SCID mice constructed with cells from patients with common variable immunodeficiency with an in vitro block in terminal B cell differentiation produced human Ig responses that were quantitatively the same as those produced by hu-PBL-SCID mice from normal donors. The hu-PBL-SCID system using PBMC appears to lead to growth and Ig production by a small number of B cells and results in a restricted B cell repertoire." @default.
- W2034421194 created "2016-06-24" @default.
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- W2034421194 date "1991-02-01" @default.
- W2034421194 modified "2023-10-16" @default.
- W2034421194 title "Limited B cell repertoire in severe combined immunodeficient mice engrafted with peripheral blood mononuclear cells derived from immunodeficient or normal humans." @default.
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- W2034421194 doi "https://doi.org/10.1172/jci115043" @default.
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