Abstract:
: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)6P2P30, were incorporated into MS of different compositions. P30B2 and (NANP)6P2P30 are composed of one or two universal T helper epitopes from tetanus toxin, 947-967 (P30) and 830-843 (P2), and of a B cell epitope derived from the repeat sequence of Plasmodium berghei or Plasmodium falciparum, respectively. BALB/c mice were immunized with these two peptides in different formulations, including individual MS or mixtures of MS with various release properties, Incomplete Freund's adjuvant (IFA) or as soluble peptides. MS formulations elicited strong and sustained proliferative and antibody responses comparable to those obtained with the IFA preparations. Furthermore, MS formulations induced specific isotype/ subclass antibodies similar to those induced by IFA. No significant augmentation of total serum IgE was detected during this study. In addition, a boosting effect was obtained when the immunized mice were reinjected with a small antigen dose in IFA several months later. These results indicate that biodegradable MS may be a suitable vaccine delivery system/adjuvant not only for protein antigens but also for weakly immunogenic synthetic peptides.
journal_name
Vaccinejournal_title
Vaccineauthors
Men Y,Gander B,Merkle HP,Corradin Gdoi
10.1016/s0264-410x(96)00074-6subject
Has Abstractpub_date
1996-10-01 00:00:00pages
1442-50issue
15eissn
0264-410Xissn
1873-2518pii
S0264410X96000746journal_volume
14pub_type
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