{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:45:36Z","timestamp":1760150736292,"version":"build-2065373602"},"reference-count":71,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2022,1,19]],"date-time":"2022-01-19T00:00:00Z","timestamp":1642550400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003593","name":"National Council for Scientific and Technological Development","doi-asserted-by":"publisher","award":["#470701-2014-5"],"award-info":[{"award-number":["#470701-2014-5"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Membranes"],"abstract":"<jats:p>Background: Angiostrongyliasis, the leading cause universal of eosinophilic meningitis, is an emergent disease due to Angiostrongylus cantonensis (rat lungworm) larvae, transmitted accidentally to humans. The diagnosis of human angiostrongyliasis is based on epidemiologic characteristics, clinical symptoms, medical history, and laboratory findings, particularly hypereosinophilia in blood and cerebrospinal fluid. Thus, the diagnosis is difficult and often confused with those produced by other parasitic diseases. Therefore, the development of a fast and specific diagnostic test for angiostrongyliasis is a challenge mainly due to the lack of specificity of the described tests, and therefore, the characterization of a new target is required. Material and Methods: Using bioinformatics tools, the putative presenilin (PS) protein C7BVX5-1 was characterized structurally and phylogenetically. A peptide microarray approach was employed to identify single and specific epitopes, and tetrameric epitope peptides were synthesized to evaluate their performance in an ELISA-peptide assay. Results: The data showed that the A. cantonensis PS protein presents nine transmembrane domains, the catalytic aspartyl domain [(XD (aa 241) and GLGD (aa 332\u2013335)], between TM6 and TM7 and the absence of the PALP and other characteristics domains of the class A22 and homologous presenilin (PSH). These individualities make it an atypical sub-branch of the PS family, located in a separate subgroup along with the enzyme Haemogonchus contournus and separated from other worm subclasses. Twelve B-linear epitopes were identified by microarray of peptides and validated by ELISA using infected rat sera. In addition, their diagnostic performance was demonstrated by an ELISA-MAP4 peptide. Conclusions: Our data show that the putative AgPS is an atypical multi-pass transmembrane protein and indicate that the protein is an excellent immunological target with two (PsAg3 and PsAg9) A. costarisencis cross-reactive epitopes and eight (PsAg1, PsAg2, PsAg6, PsAg7, PsAg8, PsAg10, PsAg11, PsAg12) apparent unique A. cantonensis epitopes. These epitopes could be used in engineered receptacle proteins to develop a specific immunological diagnostic assay for angiostrongyliasis caused by A. cantonensis.<\/jats:p>","DOI":"10.3390\/membranes12020108","type":"journal-article","created":{"date-parts":[[2022,1,19]],"date-time":"2022-01-19T21:01:51Z","timestamp":1642626111000},"page":"108","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Angiostrongylus cantonensis an Atypical Presenilin: Epitope Mapping, Characterization, and Development of an ELISA Peptide Assay for Specific Diagnostic of Angiostrongyliasis"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2172-656X","authenticated-orcid":false,"given":"Salvatore G.","family":"De-Simone","sequence":"first","affiliation":[{"name":"Center of Technological Development in Health (CDTS), National Institute of Science and Technology for Innovation on Neglected Diseases (INCT-IDN), FIOCRUZ, Rio de Janeiro 21040-900, RJ, Brazil"},{"name":"Laboratory of Epidemiology and Molecular Systematics (LESM), Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro 21040-900, RJ, Brazil"},{"name":"Department of Cellular and Molecular Biology, Biology Institute, Federal Fluminense University, Niter\u00f3i 24220-900, RJ, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paloma","family":"Napole\u00e3o-P\u00eago","sequence":"additional","affiliation":[{"name":"Center of Technological Development in Health (CDTS), National Institute of Science and Technology for Innovation on Neglected Diseases (INCT-IDN), FIOCRUZ, Rio de Janeiro 21040-900, RJ, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Priscila S.","family":"Gon\u00e7alves","sequence":"additional","affiliation":[{"name":"Center of Technological Development in Health (CDTS), National Institute of Science and Technology for Innovation on Neglected Diseases (INCT-IDN), FIOCRUZ, Rio de Janeiro 21040-900, RJ, Brazil"},{"name":"Department of Cellular and Molecular Biology, Biology Institute, Federal Fluminense University, Niter\u00f3i 24220-900, RJ, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4538-3802","authenticated-orcid":false,"given":"Guilherme C.","family":"Lechuga","sequence":"additional","affiliation":[{"name":"Center of Technological Development in Health (CDTS), National Institute of Science and Technology for Innovation on Neglected Diseases (INCT-IDN), FIOCRUZ, Rio de Janeiro 21040-900, RJ, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"suffix":"Jr.","given":"Arnaldo","family":"Mandonado","sequence":"additional","affiliation":[{"name":"Laboratory of Biology and Parasitology of Wild Mammals Reservoirs, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro 21040-360, RJ, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carlos","family":"Graeff-Teixeira","sequence":"additional","affiliation":[{"name":"Infectious Diseases Unit, Department of Pathology, Federal University of Espirito Santo, Vit\u00f3ria 29075-910, ES, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9824-0672","authenticated-orcid":false,"suffix":"Jr.","given":"David W.","family":"Provance","sequence":"additional","affiliation":[{"name":"Center of Technological Development in Health (CDTS), National Institute of Science and Technology for Innovation on Neglected Diseases (INCT-IDN), FIOCRUZ, Rio de Janeiro 21040-900, RJ, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,1,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"621","DOI":"10.1016\/S1473-3099(08)70229-9","article-title":"Human angiostrongyliasis","volume":"8","year":"2008","journal-title":"Lancet Infect. 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