The present invention relates to a pharmaceutical composition and a health functional food composition for preventing, alleviating or treating inflammatory diseases, including Toxoplasma gondii GRA9 protein or a gene encoding the protein as an active ingredient. The present inventors have identified the C-terminal region essential for the NLRP3-mediated mechanism of action and function of Toxoplasma gondii GRA9 in macrophages, which are host immune cells and confirmed the substantial anti-inflammatory and antibacterial effects and the antiseptic effect in vivo. Accordingly, Toxoplasma gondii GRA9 protein or a gene encoding the protein is expected to be usefully utilized in the field of prevention or treatment of inflammatory diseases caused by an abnormal NLRP3-mediated inflammatory response, including sepsis.

The present invention relates to a pharmaceutical composition and a health functional food composition for preventing, alleviating or treating inflammatory diseases, including Toxoplasma gondii GRA9 protein or a gene encoding the protein as an active ingredient. The present inventors have identified the C-terminal region essential for the NLRP3-mediated mechanism of action and function of Toxoplasma gondii GRA9 in macrophages, which are host immune cells and confirmed the substantial anti-inflammatory and antibacterial effects and the antiseptic effect in vivo. Accordingly, Toxoplasma gondii GRA9 protein or a gene encoding the protein is expected to be usefully utilized in the field of prevention or treatment of inflammatory diseases caused by an abnormal NLRP3-mediated inflammatory response, including sepsis.

Provided is a protein having Toxoplasma immunogenicity, the protein being a cyclophilin mutant protein and consisting of the amino acid sequence as shown in SED 2. Further provided is a nucleic acid that may encode a protein having Toxoplasma immunogenicity, which has the nucleic acid sequence as shown in SEQ ID NO. 1. Further provided is a vaccine, which is obtained by double-digesting a Toxoplasma antigen gene and then linking the same to a prokaryotic expression vector such as pET28a, and transforming the same into a prokaryotic expression engineering strain such as BL21(DE3), thereby inducing the high-efficiency expression thereof, wherein the inducing the high-efficiency expression thereof, wherein the purified protein is a soluble protein which maintains specific immunogenicity thereof.

Provided is a protein having Toxoplasma immunogenicity, the protein being a cyclophilin mutant protein and consisting of the amino acid sequence as shown in SED 2. Further provided is a nucleic acid that may encode a protein having Toxoplasma immunogenicity, which has the nucleic acid sequence as shown in SEQ ID NO. 1. Further provided is a vaccine, which is obtained by double-digesting a Toxoplasma antigen gene and then linking the same to a prokaryotic expression vector such as pET28a, and transforming the same into a prokaryotic expression engineering strain such as BL21(DE3), thereby inducing the high-efficiency expression thereof, wherein the inducing the high-efficiency expression thereof, wherein the purified protein is a soluble protein which maintains specific immunogenicity thereof.

The present disclosure provides genetically altered protozoan parasites comprising a mutation in a bradyzoite formation deficient 1 (BFD1) gene, wherein the mutation inhibits differentiation of the parasite into a bradyzoite. The genetically altered protozoan parasites can be utilized in vaccine compositions and in methods of treating apicomplexan parasite infection.

The present disclosure provides genetically altered protozoan parasites comprising a mutation in a bradyzoite formation deficient 1 (BFD1) gene, wherein the mutation inhibits differentiation of the parasite into a bradyzoite. The genetically altered protozoan parasites can be utilized in vaccine compositions and in methods of treating apicomplexan parasite infection.

Provided are nucleic acid constructs, Toxoplasma comprising same, pharmaceutical compositions comprising same and methods using same for delivering a protein-of-interest to a tissue-of-interest of a subject, such as the CNS and further treating a pathology which is treatable by administration of a therapeutic polypeptide in a central nervous system of the subject.

Provided are nucleic acid constructs, Toxoplasma comprising same, pharmaceutical compositions comprising same and methods using same for delivering a protein-of-interest to a tissue-of-interest of a subject, such as the CNS and further treating a pathology which is treatable by administration of a therapeutic polypeptide in a central nervous system of the subject.

The present disclosure relates to a use of virus-like particles including Toxoplasma gondii apical membrane antigen 1 for serodiagnosing toxoplasmosis, wherein an enzyme-linked immunosorbent assay with an infected serum was conducted using virus-like particles expressing Toxoplasma gondii AMA1, and higher sensitivity than the existing Toxoplasma gondii antigen was observed using virus-like particles, and no false diagnosis such as false negatives and false positives appeared after a reaction with a malaria-infected serum and thus high specificity was identified.

The present disclosure relates to a use of virus-like particles including Toxoplasma gondii apical membrane antigen 1 for serodiagnosing toxoplasmosis, wherein an enzyme-linked immunosorbent assay with an infected serum was conducted using virus-like particles expressing Toxoplasma gondii AMA1, and higher sensitivity than the existing Toxoplasma gondii antigen was observed using virus-like particles, and no false diagnosis such as false negatives and false positives appeared after a reaction with a malaria-infected serum and thus high specificity was identified.