{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T15:13:27Z","timestamp":1790262807190,"version":"4.1.0"},"reference-count":65,"publisher":"The Company of Biologists","issue":"6","license":[{"start":{"date-parts":[[2025,6,23]],"date-time":"2025-06-23T00:00:00Z","timestamp":1750636800000},"content-version":"vor","delay-in-days":8,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/501100001411","name":"Indian Council of Medical Research","doi-asserted-by":"crossref","award":["VIR\/20\/2020\/ECD-I"],"award-info":[{"award-number":["VIR\/20\/2020\/ECD-I"]}],"id":[{"id":"10.13039\/501100001411","id-type":"DOI","asserted-by":"crossref"}]},{"name":"National Institute of Cholera and Enteric Diseases"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,6,15]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n               <jats:p>Chronic gastritis is one of the major symptoms of gastro-duodenal disorders typically induced by Helicobacter pylori (H. pylori). To date, no suitable model is available to study pathophysiology and therapeutic measures accurately. Here, we present a successful surgical infection model of H. pylori-induced gastritis in C57BL\/6 mice that resembles features of human infection. The proposed model does not require any preparatory treatment other than surgical intervention. C57BL\/6 mice were injected with wild-type SS1 (Sydney strain 1, reference strain) directly into the stomach. Seven days post infection, infected animals showed alterations in cytokine responses along with inflammatory cell infiltration in the lamina propria, depicting a prominent inflammatory response due to infection. To understand the immunogenicity and protective efficacy, the mice were immunized with outer membrane vesicles (OMVs) isolated from an indigenous strain with putative virulence factors of H. pylori [A61C (1), cag+\/vacA s1m1]. In contrast to the non-immunized cohort, the OMV-immunized cohort showed a gradual increase in serum immunoglobulin(s) levels on the 35th day after the first immunization. This conferred protective immunity against subsequent challenge with the reference strain (SS1). Direct inoculation of H. pylori into the stomach influenced infection in a short time and, more importantly, in a dose-dependent manner, indicating the usefulness of the developed model for pathophysiology, therapeutic and prophylactic studies.<\/jats:p>","DOI":"10.1242\/bio.060282","type":"journal-article","created":{"date-parts":[[2024,4,11]],"date-time":"2024-04-11T12:34:37Z","timestamp":1712838877000},"source":"Crossref","is-referenced-by-count":6,"title":["Establishment of an intragastric surgical model using C57BL\/6 mice to study the vaccine efficacy of OMV-based immunogens against <i>Helicobacter pylori<\/i>"],"prefix":"10.1242","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6500-1491","authenticated-orcid":false,"given":"Sanjib","family":"Das","sequence":"first","affiliation":[{"name":"ICMR-National Institute of Cholera and Enteric Diseases Division of Bacteriology , , P-33, CIT Road, Scheme-XM, Beliaghata, Kolkata 700010 ,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0389-6717","authenticated-orcid":false,"given":"Prolay","family":"Halder","sequence":"additional","affiliation":[{"name":"ICMR-National Institute of Cholera and Enteric Diseases Division of Bacteriology , , P-33, CIT Road, Scheme-XM, Beliaghata, Kolkata 700010 ,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Soumalya","family":"Banerjee","sequence":"additional","affiliation":[{"name":"ICMR-National Institute of Cholera and Enteric Diseases Division of Bacteriology , , P-33, CIT Road, Scheme-XM, Beliaghata, Kolkata 700010 ,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5638-4520","authenticated-orcid":false,"given":"Asish Kumar","family":"Mukhopadhyay","sequence":"additional","affiliation":[{"name":"ICMR-National Institute of Cholera and Enteric Diseases Division of Bacteriology , , P-33, CIT Road, Scheme-XM, Beliaghata, Kolkata 700010 ,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6897-7390","authenticated-orcid":false,"given":"Shanta","family":"Dutta","sequence":"additional","affiliation":[{"name":"ICMR-National Institute of Cholera and Enteric Diseases Division of Bacteriology , , P-33, CIT Road, Scheme-XM, Beliaghata, Kolkata 700010 ,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1379-9563","authenticated-orcid":false,"given":"Hemanta","family":"Koley","sequence":"additional","affiliation":[{"name":"ICMR-National Institute of Cholera and Enteric Diseases Division of Bacteriology , , P-33, CIT Road, Scheme-XM, Beliaghata, Kolkata 700010 ,","place":["India"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"237","published-online":{"date-parts":[[2025,6,23]]},"reference":[{"key":"2025062510234562900_BIO060282C1","doi-asserted-by":"publisher","first-page":"2870","DOI":"10.3748\/wjg.v23.i16.2870","article-title":"Strategies used by helicobacter pylori to establish persistent infection","volume":"23","author":"Abadi","year":"2017","journal-title":"World J. 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