TY - JOUR
T1 - Binding of antigen by immunocytes. II. Effect of specific Ig on antigen binding by MOPC 315 cells
AU - Bystryn, J. C.
AU - Siskind, G. W.
AU - Uhr, J. W.
PY - 1975
Y1 - 1975
N2 - The effect of specific immunoglobulin (Ig) on specific binding of antigen to cells has been studied in a model system consisting of murine myeloma cells (MOPC 315), MOPC 315 serum, and DNP conjugates. MOPC 315 serum, which has IgA specific for DNP, specifically inhibited the binding of DNP conjugates to these cells. Using this model it was found that cells have a marked advantage over free specific Ig in binding multivalent antigen molecules and retaining them in a bound state. Cells were able to specifically bind multivalent antigen in the presence of a large excess of free specific Ig. The kinetics of antigen binding to cells was slow, and prolongation of time of incubation increased the amount of specific binding. Both antihapten and anticarrier Ig augmented nonspecific binding of multivalent but not of univalent hapten to control cells. Furthermore, antihapten Ig at low concentration increased antigen binding to specific cells.
AB - The effect of specific immunoglobulin (Ig) on specific binding of antigen to cells has been studied in a model system consisting of murine myeloma cells (MOPC 315), MOPC 315 serum, and DNP conjugates. MOPC 315 serum, which has IgA specific for DNP, specifically inhibited the binding of DNP conjugates to these cells. Using this model it was found that cells have a marked advantage over free specific Ig in binding multivalent antigen molecules and retaining them in a bound state. Cells were able to specifically bind multivalent antigen in the presence of a large excess of free specific Ig. The kinetics of antigen binding to cells was slow, and prolongation of time of incubation increased the amount of specific binding. Both antihapten and anticarrier Ig augmented nonspecific binding of multivalent but not of univalent hapten to control cells. Furthermore, antihapten Ig at low concentration increased antigen binding to specific cells.
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U2 - 10.1084/jem.141.6.1227
DO - 10.1084/jem.141.6.1227
M3 - Article
C2 - 1168694
AN - SCOPUS:0016704117
SN - 0022-1007
VL - 141
SP - 1227
EP - 1237
JO - Journal of Experimental Medicine
JF - Journal of Experimental Medicine
IS - 6
ER -