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Inst. Oswaldo Cruz"],"abstract":"<jats:p> BACKGROUND Rickettsia is a genus of Gram-negative bacteria that causes various diseases, including epidemic typhus, Rocky Mountain spotted fever, and Mediterranean spotted fever. Ticks transmit these diseases and commonly found in developing regions with poor sanitation. As a result, it is difficult to estimate the number of these diseases cases, making it challenging to create prevention and diagnostic mechanisms.  OBJECTIVES  Thus, this study aimed to develop an in silico multi-epitope vaccine against Rickettsia.  METHODS  Eight proteins were previously identified as potential vaccine candidates through reverse vaccinology and were screened for epitopes that bind to MHC class I and II molecules. The epitopes were then analysed for antigenicity, allergenicity, and toxicity. The selected epitopes were linked with AAY and GPGPG sequences peptide and a known adjuvant, the B-chain of Escherichia coli heat-labile enterotoxin, to form a chimeric multi-epitope protein. The protein\u2019s three-dimensional structure was predicted, and molecular docking analysis was performed against the toll-like receptor 4 (TLR4). Finally, the immune response to the protein was simulated using C-ImmSim tool.  FINDINGS  A total of 26 immunogenic epitopes, formed the multi-epitope vaccine RGME-VAC\/ATS-1. The vaccine showed excellent immunogenic parameters and was predicted to do not be toxic or allergenic to the host. It also showed good potential stimulation of immune cells, with a propensity to generate memory cells and elicit IFN-\u03b3 secretion.  MAIN CONCLUSIONS  The in silico validations suggest that our study successfully designed an innovative multi-epitope vaccine against Rickettsia, addressing the challenges posed by the elusive nature of diseases caused by this genus. We provide a promising potential for further experimental exploration and the development of targeted prevention and diagnostic strategies for these diseases.<\/jats:p>","DOI":"10.1590\/0074-02760240201","type":"journal-article","created":{"date-parts":[[2025,3,22]],"date-time":"2025-03-22T09:45:18Z","timestamp":1742636718000},"source":"Crossref","is-referenced-by-count":3,"title":["In silico construction of a multi-epitope vaccine (RGME-VAC\/ATS-1) against the Rickettsia genus using immunoinformatics"],"prefix":"10.1590","volume":"120","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8813-8850","authenticated-orcid":false,"given":"Andrei Giacchetto","family":"Felice","sequence":"first","affiliation":[{"name":"Universidade Federal do Tri\u00e2ngulo Mineiro,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tha\u00eds Cristina Vilela","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"Universidade Federal de Minas Gerais,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro Henrique","family":"Marques","sequence":"additional","affiliation":[{"name":"Universidade Federal de Minas Gerais,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Felipe Lucas","family":"Zen","sequence":"additional","affiliation":[{"name":"Universidade Federal do Tri\u00e2ngulo Mineiro,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcela Rezende","family":"Lemes","sequence":"additional","affiliation":[{"name":"Universidade Federal de Minas Gerais,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rafael Obata","family":"Trevisan","sequence":"additional","affiliation":[{"name":"Universidade Federal do Tri\u00e2ngulo Mineiro,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bruno Silva","family":"Andrade","sequence":"additional","affiliation":[{"name":"Universidade Estadual do Sudoeste da Bahia,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlo Jos\u00e9 Freire","family":"de Oliveira","sequence":"additional","affiliation":[{"name":"Universidade Federal do Tri\u00e2ngulo Mineiro,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vasco Ariston de Carvalho","family":"Azevedo","sequence":"additional","affiliation":[{"name":"Universidade Federal de Minas Gerais,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sandeep","family":"Tiwari","sequence":"additional","affiliation":[{"name":"Universidade Federal da Bahia,  Brazil; Universidade Federal da Bahia,  Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7299-3724","authenticated-orcid":false,"given":"Siomar de Castro","family":"Soares","sequence":"additional","affiliation":[{"name":"Universidade Federal do Tri\u00e2ngulo Mineiro,  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