{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,3]],"date-time":"2026-03-03T06:22:58Z","timestamp":1772518978998,"version":"3.50.1"},"reference-count":39,"publisher":"Portland Press Ltd.","issue":"5","license":[{"start":{"date-parts":[[2019,7,25]],"date-time":"2019-07-25T00:00:00Z","timestamp":1564012800000},"content-version":"vor","delay-in-days":296,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["portlandpress.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2018,10,31]]},"abstract":"<jats:p>Amoebiasis is a parasitic disease caused by Entamoeba histolytica. This illness is prevalent in poor countries causing 100,000 deaths worldwide. Knowledge of the natural resistance mechanisms of rats to amoebic liver abscess (ALA) development may help to discover new pathogenic factors and to design novel therapeutic strategies against amoebiasis. In this work, histologic analyses suggested that the complement system may play a central role in rat natural resistance to ALA. E. histolytica trophozoites disappeared from rat liver within 6 h post-infection with minimal or no inflammatory infiltrate. In vitro findings indicate that rat complement was lethal for the parasite. Furthermore, hamsters became resistant to ALA by intravenous administration of fresh rat serum before infection. The amoebicidal potency of rat complement was 10 times higher than hamster complement and was not related to their respective CH50 levels. The alternative pathway of complement plays a central role in its toxicity to E. histolytica since trypan blue, which is a C3b receptor inhibitor, blocks its amoebicidal activity. These results suggest that amoebic membrane affinity, high for C3b and\/or low for Factor H, in comparison with the hamster ones, may result in higher deposition of membrane complex attack on parasite surface and death.<\/jats:p>","DOI":"10.1042\/bsr20180713","type":"journal-article","created":{"date-parts":[[2018,9,10]],"date-time":"2018-09-10T18:06:02Z","timestamp":1536602762000},"update-policy":"https:\/\/doi.org\/10.1042\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Complement is a rat natural resistance factor to amoebic liver infection"],"prefix":"10.1042","volume":"38","author":[{"given":"Alfonso","family":"Olivos-Garc\u00eda","sequence":"first","affiliation":[{"name":"Unidad de Investigaci\u00f3n en Medicina Experimental, Facultad de Medicina, Universidad Nacional Aut\u00f3noma de M\u00e9xico, Ciudad de M\u00e9xico, 04510, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mario","family":"Nequiz","sequence":"additional","affiliation":[{"name":"Unidad de Investigaci\u00f3n en Medicina Experimental, Facultad de Medicina, Universidad Nacional Aut\u00f3noma de M\u00e9xico, Ciudad de M\u00e9xico, 04510, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Scarlet","family":"Liceaga","sequence":"additional","affiliation":[{"name":"Unidad de Investigaci\u00f3n en Medicina Experimental, Facultad de Medicina, Universidad Nacional Aut\u00f3noma de M\u00e9xico, Ciudad de M\u00e9xico, 04510, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Edith","family":"Mendoza","sequence":"additional","affiliation":[{"name":"Unidad de Investigaci\u00f3n en Medicina Experimental, Facultad de Medicina, Universidad Nacional Aut\u00f3noma de M\u00e9xico, Ciudad de M\u00e9xico, 04510, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Porfirio","family":"Z\u00fa\u00f1iga","sequence":"additional","affiliation":[{"name":"Centro M\u00e9dico Dalinde, Tuxpan 25, Roma sur, Ciudad de M\u00e9xico, 06760, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Azucena","family":"Cortes","sequence":"additional","affiliation":[{"name":"Unidad de Investigaci\u00f3n en Medicina Experimental, Facultad de Medicina, Universidad Nacional Aut\u00f3noma de M\u00e9xico, Ciudad de M\u00e9xico, 04510, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gabriel","family":"L\u00f3pez-Vel\u00e1zquez","sequence":"additional","affiliation":[{"name":"Grupo de Estudio en Biomol\u00e9culas y Salud Infantil, Laboratorio de EIMyT, Instituto Nacional de Pediatr\u00eda, Ciudad de M\u00e9xico, 04530, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sergio","family":"Enr\u00edquez-Flores","sequence":"additional","affiliation":[{"name":"Grupo de Estudio en Biomol\u00e9culas y Salud Infantil, Laboratorio de EIMyT, Instituto Nacional de Pediatr\u00eda, Ciudad de M\u00e9xico, 04530, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emma","family":"Saavedra","sequence":"additional","affiliation":[{"name":"Departamento de Bioqu\u00edmica, Instituto Nacional de Cardiolog\u00eda Ignacio Ch\u00e1vez, Ciudad de M\u00e9xico, 14080, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ruy","family":"P\u00e9rez-Tamayo","sequence":"additional","affiliation":[{"name":"Unidad de Investigaci\u00f3n en Medicina Experimental, Facultad de Medicina, Universidad Nacional Aut\u00f3noma de M\u00e9xico, Ciudad de M\u00e9xico, 04510, M\u00e9xico"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"288","published-online":{"date-parts":[[2018,10,2]]},"reference":[{"key":"2021111619153004100_B1","first-page":"97","article-title":"Amoebiasis","volume":"72","author":"WHO: World Health Organization","year":"1997","journal-title":"WHO Weekly Epidemiologic Record"},{"key":"2021111619153004100_B2","doi-asserted-by":"publisher","first-page":"210","DOI":"10.1016\/j.arcmed.2005.09.011","article-title":"Experimental amebiasis: a selected review of some in vivo models","volume":"37","author":"Tsutsumi","year":"2006","journal-title":"Arch. 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