PMID- 30181047 OWN - NLM STAT- MEDLINE DCOM- 20181211 LR - 20181211 IS - 1873-2518 (Electronic) IS - 0264-410X (Linking) VI - 36 IP - 41 DP - 2018 Oct 1 TI - Characterization of a multi-epitope peptide with selective MHC-binding capabilities encapsulated in PLGA nanoparticles as a novel vaccine candidate against Toxoplasma gondii infection. PG - 6124-6132 LID - S0264-410X(18)31208-8 [pii] LID - 10.1016/j.vaccine.2018.08.068 [doi] AB - No effective human vaccine against Toxoplasma gondii (T. gondii) has yet been developed; however, a protective vaccine using immunogenic peptides in a safe delivery vehicle system offers promise. Here, we employed bioinformatics to design a multimeric recombinant T. gondii vaccine using predicted T and B cell epitopes of SAG1, AMA1, ROP2, and GRA4 proteins based on their binding capabilities to common major histocompatibility complex (MHC) molecules. Furthermore, we encapsulated the expressed protein in poly lactic-co-glycolic acid (PLGA) nanoparticles as a delivery vehicle and also used alum as an adjuvant to determine the vaccine potency of this multimeric antigen. BALB/c mice were vaccinated and then challenged with T. gondii RH strain, and the survival rate and cytokine profiles were studied. Mice vaccinated with the multi-epitope-based vaccine, both with and without PLGA, had greater Th1 immune responses, survival rates, specific antibody titers, and IFN-gamma and IL-2 levels than controls, while the alum-adsorbed vaccine stimulated a Th2-type humoral immune response. CI - Copyright (c) 2018 Elsevier Ltd. All rights reserved. FAU - Roozbehani, Mona AU - Roozbehani M AD - Department of Parasitology and Mycology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. FAU - Falak, Reza AU - Falak R AD - Immunology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. FAU - Mohammadi, Mohsen AU - Mohammadi M AD - Persian Gulf Marine Biotechnology Research Center, Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran. FAU - Hemphill, Andrew AU - Hemphill A AD - Institute of Parasitology, Vetsuisse Faculty, University of Bern, Bern, Switzerland. FAU - Razmjou, Elham AU - Razmjou E AD - Department of Parasitology and Mycology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. FAU - Meamar, Ahmad Reza AU - Meamar AR AD - Department of Parasitology and Mycology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. FAU - Masoori, Leila AU - Masoori L AD - Department of Parasitology and Mycology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. FAU - Khoshmirsafa, Majid AU - Khoshmirsafa M AD - Immunology Research Center, Iran University of Medical Sciences, Tehran, Iran; Department of Immunology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. FAU - Moradi, Maryam AU - Moradi M AD - Department of Parasitology and Mycology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. FAU - Gharavi, Mohammad Javad AU - Gharavi MJ AD - Department of Parasitology, Faculty of Allied Medicine, Iran University of Medical Sciences, Tehran, Iran. Electronic address: gharavi.mj@iums.ac.ir. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180901 PL - Netherlands TA - Vaccine JT - Vaccine JID - 8406899 RN - 0 (Adjuvants, Immunologic) RN - 0 (Antibodies, Protozoan) RN - 0 (Antigens, Protozoan) RN - 0 (Interleukin-2) RN - 0 (Peptides) RN - 0 (Protozoan Proteins) RN - 0 (Protozoan Vaccines) RN - 1SIA8062RS (Polylactic Acid-Polyglycolic Acid Copolymer) RN - 82115-62-6 (Interferon-gamma) SB - IM MH - Adjuvants, Immunologic MH - Animals MH - Antibodies, Protozoan/immunology MH - Antigens, Protozoan/*immunology MH - Computational Biology MH - Female MH - Immunity, Humoral/physiology MH - Interferon-gamma/metabolism MH - Interleukin-2/metabolism MH - Mice MH - Mice, Inbred BALB C MH - Nanoparticles/*chemistry MH - Peptides/*immunology MH - Polylactic Acid-Polyglycolic Acid Copolymer/*chemistry MH - Protozoan Proteins/immunology MH - Protozoan Vaccines/*immunology/*therapeutic use MH - Toxoplasma/*immunology/*pathogenicity OTO - NOTNLM OT - Multi-epitope OT - PLGA nanoparticle OT - Toxoplasma gondii OT - Vaccine EDAT- 2018/09/06 06:00 MHDA- 2018/12/12 06:00 CRDT- 2018/09/06 06:00 PHST- 2018/06/28 00:00 [received] PHST- 2018/08/21 00:00 [revised] PHST- 2018/08/28 00:00 [accepted] PHST- 2018/09/06 06:00 [pubmed] PHST- 2018/12/12 06:00 [medline] PHST- 2018/09/06 06:00 [entrez] AID - S0264-410X(18)31208-8 [pii] AID - 10.1016/j.vaccine.2018.08.068 [doi] PST - ppublish SO - Vaccine. 2018 Oct 1;36(41):6124-6132. doi: 10.1016/j.vaccine.2018.08.068. Epub 2018 Sep 1.