Abstract
The kinetics and nature of the immune response to dextran-BSA entrapped into liposomes was studied in rabbit. The antibody titer in the secondary immunization was found to be higher as compared to that in the primary response. In the primary response antibodies were of both IgG and IgM type but following secondary immunization the IgG level was increased. The conjugate entrapped into liposomes could establish an immunological memory for dextran. In order to eliminate the carrier effect of BSA, dextran was either entrapped or coupled to liposome and the immune response was studied in mice. The results revealed that dextran entrapped into liposomes or coupled to liposome surface induced IgM type immune response and antibody titer did not increase on secondary immunization.
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