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We have previously reported that biodegradable polymer microspheres (MS) are capable of eliciting strong and long-lasting antibody and T cell proliferative responses for either natural protein antigens or synthetic peptides. In this study, we investigated the possibility of inducing antigen-specific cytotoxic T lymphocyte (CTL) responses in vivo with a short synthetic peptide from the circumsporozoite...
Biodegradable microspheres (MS) based on poly(D,L-lactide) and poly(D,L-lactide-coglycolide) have the capacity to release encapsulated antigens over defined lengths of time depending on their composition and to elicit and sustain strong and long-lasting immune responses to protein antigens. In the present study, two synthetic multiple antigenic peptides (MAP), P30B2 and (NANP) 6 P2P30, were...
The importance of in vitro degradation of poly(lactide)/poly(lactide-co-glycolide) (PLA/PLGA) microspheres and of the concomitant in vitro release of a natural and a synthetic antigen for eliciting immune response was studied in mice. A variety of PLAs and PLGAs differing in molecular weight (M w of 14-130 kDa) and in polymer composition (lacticglycolic acid ratio of 100:00, 75:25, and 50:50)...
The use of biodegradable polymer microspheres as a single dose vaccine delivery system was investigated by using tetanus toxoid (TT). In order to compare the immunogenicity of TT-microspheres (TT-MS) with aluminum hydroxide (alum)-based TT, BALB/c mice were immunized with TT in different formulations including individual or mixtures of MS and TT-alum. All TT-MS formulations elicited high proliferative...
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