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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Mouse monoclonal antibodies to chicken VH idiotypic determinants reactivity with B and T cells.

We have prepared mouse monoclonal antibodies against idiotypic (Id) determinants on chicken antibodies to N-acetylglucosamine (NAGA) and p-aminobenzoic acid (PABA) made by inbred line EL 6(3) birds. The monoclonal anti-NAGA Id antibody, termed CId-1, reacted with affinity purified antibodies to NAGA, but not with antibodies specific for PABA, arsanilic acid (Ars), phosphorylcholine (PC), or with normal chicken IgG and IgM. The monoclonal anti-PABA ID antibody, termed CId-2, reacted with anti-PABA antibodies and to a lesser extent with anti-Ars antibodies, but not with anti-NAGA, anti-PC, and normal IgG and IgM. The Id determinants were found among antibodies to NAGA and PABA made by outbred and inbred lines of White Leghorn chickens. The binding of the CId-1 and CId-2 antibodies to intact homologous anti-NAGA and anti-PABA antibodies, respectively, was not hapten-inhibitable in either case. Both anti-Id antibodies reacted specifically with isolated homologous heavy chains, suggesting VH Id specificities. The monoclonal CId-1 and CId-2 antibodies were reactive by immunofluorescence with approximately 0.9 and 0.2%, respectively, of the circulating lymphocytes and with approximately 0.4 and 0.15 of plasma cells. CId-1+ and CId-2+ bursal cells were first detected on the 16th and 14th days of incubation, respectively; both reached maximal frequencies by the 17th day of incubation. The CId-2 antibody reacted exclusively with immunoglobulin-positive cells. The CId-1 antibody also reacted with a subpopulation (0.4%) of immunoglobulin-negative lymphocytes from normal and agammaglobulinemic chickens, and thus would appear to recognize an idiotypic determinant expressed by certain clones of B and T cells.[1]


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