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The Plasmodium falciparum circumsporozoite protein is considered a major antimalarial-vaccine target due to its involvement in sporozoite invasion of mosquito’s salivary glands and human hepatocytes. The 4383, 4388 and 4389 CSP-conserved high activity hepatocyte binding peptides and their modified analogues were synthesised and their immunogenicity was tested in Aotus monkeys. Peptide 4388 modified...
Vaccines are promising for the control of toxoplasmosis. Here, we evaluated the immunogenicity of 17 peptides derived from SAG1 surface protein of Toxoplasma gondii in CH3 mice. Only 8 of 16 peptides induced specific antibodies. After a lethal challenge, only the vaccination with 4 of 17 peptides that were from the carboxy terminal end of the protein conferred significant survival. Our work shows...
Three Plasmodium falciparum serine repeat antigen (SERA) protein peptides were studied by NMR and structure calculations being done in 70:30 water:trifluoroethanol solution. Peptide 22834 was shown to be immunogenic and protective against malaria in Aotus monkeys, whilst native peptide 6737 and its analogue 14096 did not present protection against the disease in these monkeys. Results showed a relationship...
Apical membrane antigen-1 (AMA-1) is an integral Plasmodium falciparum malaria parasite membrane protein. Peptides having high activity binding to human red blood cells have been identified in this protein. One of them, peptide 4325, with the amino acid sequence MIKSAFLPTGAFKADRYKSH, for which critical binding residues have already been defined (underlined), is conserved and non-immunogenic. Its critical...
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