Immune response and protection assay of recombinant major surface glycoprotein of Leishmania (rgp63) reconstituted with liposomes in BALB/c mice. 2006

Mahmoud R Jaafari, and Attieh Ghafarian, and Ahsan Farrokh-Gisour, and Afshin Samiei, and Masoumeh Tavassoti Kheiri, and Fereidoun Mahboudi, and Farzaneh Barkhordari, and Ali Khamesipour, and W Robert McMaster
School of Pharmacy, Biotechnology Research Center, Mashhad University of Medical Sciences, P.O. Box 91775-1365, Mashhad, Iran. mr_jaafari@yahoo.com

In this study the ability of recombinant gp63 entrapped in liposomes to induce immune response and protection against L. major infection in susceptible BALB/c mice was studied. Liposomes containing rgp63 (Lip-rgp63) were prepared from egg lecithin and cholesterol using detergent solubilization method. Immunization of BALB/c mice with rgp63 alone conferred a partial protection while entrapment of rgp63 in liposomes significantly increased the rate of protection (P<0.05). The parasite burden of spleen in mice challenged with L. major was significantly (p<0.001) lower in group of mice immunized with rgp63 alone or Lip-rgp63, however, the least parasite burden was seen in Lip-rgp63 group. Both rgp63 alone and Lip-rgp63 elicited significant delayed-type hypersensitivity (DTH) response compared to controls (p<0.01), however, the DTH response of PBS-rgp63 was less than the Lip-rgp63. Titration of anti-Leishmania IgG isotypes (IgG2a/IgG1) showed a preferential Th1 type of immune response only in mice immunized with Lip-rgp63. The results indicate that liposomes might be used as a suitable immunoadjuvant for development of Leishmania vaccine.

UI MeSH Term Description Entries
D008081 Liposomes Artificial, single or multilaminar vesicles (made from lecithins or other lipids) that are used for the delivery of a variety of biological molecules or molecular complexes to cells, for example, drug delivery and gene transfer. They are also used to study membranes and membrane proteins. Niosomes,Transferosomes,Ultradeformable Liposomes,Liposomes, Ultra-deformable,Liposome,Liposome, Ultra-deformable,Liposome, Ultradeformable,Liposomes, Ultra deformable,Liposomes, Ultradeformable,Niosome,Transferosome,Ultra-deformable Liposome,Ultra-deformable Liposomes,Ultradeformable Liposome
D008666 Metalloendopeptidases ENDOPEPTIDASES which use a metal such as ZINC in the catalytic mechanism. Metallo-Endoproteinases,Metalloendopeptidase
D008807 Mice, Inbred BALB C An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research. BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D011994 Recombinant Proteins Proteins prepared by recombinant DNA technology. Biosynthetic Protein,Biosynthetic Proteins,DNA Recombinant Proteins,Recombinant Protein,Proteins, Biosynthetic,Proteins, Recombinant DNA,DNA Proteins, Recombinant,Protein, Biosynthetic,Protein, Recombinant,Proteins, DNA Recombinant,Proteins, Recombinant,Recombinant DNA Proteins,Recombinant Proteins, DNA
D005260 Female Females
D000276 Adjuvants, Immunologic Substances that augment, stimulate, activate, potentiate, or modulate the immune response at either the cellular or humoral level. The classical agents (Freund's adjuvant, BCG, Corynebacterium parvum, et al.) contain bacterial antigens. Some are endogenous (e.g., histamine, interferon, transfer factor, tuftsin, interleukin-1). Their mode of action is either non-specific, resulting in increased immune responsiveness to a wide variety of antigens, or antigen-specific, i.e., affecting a restricted type of immune response to a narrow group of antigens. The therapeutic efficacy of many biological response modifiers is related to their antigen-specific immunoadjuvanticity. Immunoactivators,Immunoadjuvant,Immunoadjuvants,Immunologic Adjuvant,Immunopotentiator,Immunopotentiators,Immunostimulant,Immunostimulants,Adjuvant, Immunologic,Adjuvants, Immunological,Immunologic Adjuvants,Immunological Adjuvant,Adjuvant, Immunological,Immunological Adjuvants
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000913 Antibodies, Protozoan Immunoglobulins produced in a response to PROTOZOAN ANTIGENS. Protozoan Antibodies
D016052 Protozoan Vaccines Suspensions of attenuated or killed protozoa administered for the prevention or treatment of infectious protozoan disease. Vaccines, Protozoan
D016773 Leishmaniasis, Cutaneous An endemic disease that is characterized by the development of single or multiple localized lesions on exposed areas of skin that typically ulcerate. The disease has been divided into Old and New World forms. Old World leishmaniasis is separated into three distinct types according to epidemiology and clinical manifestations and is caused by species of the L. tropica and L. aethiopica complexes as well as by species of the L. major genus. New World leishmaniasis, also called American leishmaniasis, occurs in South and Central America and is caused by species of the L. mexicana or L. braziliensis complexes. Leishmaniasis, American,Leishmaniasis, New World,Leishmaniasis, Old World,Oriental Sore,American Leishmaniasis,Cutaneous Leishmaniases,Cutaneous Leishmaniasis,Leishmaniases, Cutaneous,New World Leishmaniasis,Old World Leishmaniasis,Sore, Oriental

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