Anis Syahirah Saifor Adzuan, Sharifah Aminah Syed Mohamad, Rashidah Iberahim, Noor Nadia Syahira Mohd Kamal, Nurliana Abd Mutalib, Nur Intan Hasbullah, Muneer Alsaydi, Nor'aishah Hasan, Low Kheng Oon, Olaide Olawunmi Ajibola, Rozila Alias, Maimunah Mustakim, Azlin Sham Rambely, Emida Mohamed, Mohammad Reza Pourmand
{"title":"Anti-invasion activities of heat-killed lactic acid bacteria isolates against <i>Salmonella enterica</i> serovar Typhimurium.","authors":"Anis Syahirah Saifor Adzuan, Sharifah Aminah Syed Mohamad, Rashidah Iberahim, Noor Nadia Syahira Mohd Kamal, Nurliana Abd Mutalib, Nur Intan Hasbullah, Muneer Alsaydi, Nor'aishah Hasan, Low Kheng Oon, Olaide Olawunmi Ajibola, Rozila Alias, Maimunah Mustakim, Azlin Sham Rambely, Emida Mohamed, Mohammad Reza Pourmand","doi":"10.18502/ijm.v16i6.17254","DOIUrl":null,"url":null,"abstract":"<p><strong>Background and objectives: </strong>The most common cause of severe foodborne salmonellosis is <i>S.</i> Typhimurium. Its interaction with intestinal epithelial cells is little known. Lactic acid bacteria (LAB) were recognized as a prominent probiotic gastrointestinal microbiota of humans and animals that confer health-promoting and protective effects. This study aims to determine the anti-invasion and antibacterial effects of heat-killed LAB (HK-LAB) isolates against <i>S.</i> Typhimurium towards human intestinal cells.</p><p><strong>Materials and methods: </strong>12 HK-LAB isolates from 3 sources of origin (stingless bee, plant, and food) were tested to determine the adhesion of HK-LAB to Caco-2 cells, anti-invasion and antibacterial activities against <i>S.</i> Typhimurium, the adhesion and invasion pattern of <i>S.</i> Typhimurium on intestinal epithelial cells (Caco-2) and assessing the effect of LAB on the <i>S</i>. Typhimurium-host cell interaction.</p><p><strong>Results: </strong>Tairu isolates from food have the highest adhesion rate with 19 ± 1.32/10 Caco-2 cells followed by HK-LAB R-isolate from plant 17 ± 0.70/10 Caco-2 cells, which is similar to the control <i>(Lactobacillus casei)</i>. In the anti-invasion assay, the two HK-LAB isolates that had the strongest adherence to Caco-2 cells, Tairu-isolate inhibited at 78.1 ± 3.06% and R-isolate inhibited at 64.76 ± 9.02% compared to the positive control (63.81 ± 1.15%), which led to increased suppression of <i>S.</i> Typhimurium accordingly. Tairu and R isolates were tested for their antibacterial ability against <i>S</i>. Typhimurium. Both R and Tairu isolates displayed strong inhibition zones (27 ± 0.06 mm, 23 ± 0.06 mm) respectively.</p><p><strong>Conclusion: </strong>These findings suggest that the anti-invasion activities of HK-LAB R and Tairu may correlate to their bactericidal effects that serve to protect the host from infection.</p>","PeriodicalId":14633,"journal":{"name":"Iranian Journal of Microbiology","volume":"16 6","pages":"763-772"},"PeriodicalIF":1.3000,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11682547/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Iranian Journal of Microbiology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.18502/ijm.v16i6.17254","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MICROBIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Background and objectives: The most common cause of severe foodborne salmonellosis is S. Typhimurium. Its interaction with intestinal epithelial cells is little known. Lactic acid bacteria (LAB) were recognized as a prominent probiotic gastrointestinal microbiota of humans and animals that confer health-promoting and protective effects. This study aims to determine the anti-invasion and antibacterial effects of heat-killed LAB (HK-LAB) isolates against S. Typhimurium towards human intestinal cells.
Materials and methods: 12 HK-LAB isolates from 3 sources of origin (stingless bee, plant, and food) were tested to determine the adhesion of HK-LAB to Caco-2 cells, anti-invasion and antibacterial activities against S. Typhimurium, the adhesion and invasion pattern of S. Typhimurium on intestinal epithelial cells (Caco-2) and assessing the effect of LAB on the S. Typhimurium-host cell interaction.
Results: Tairu isolates from food have the highest adhesion rate with 19 ± 1.32/10 Caco-2 cells followed by HK-LAB R-isolate from plant 17 ± 0.70/10 Caco-2 cells, which is similar to the control (Lactobacillus casei). In the anti-invasion assay, the two HK-LAB isolates that had the strongest adherence to Caco-2 cells, Tairu-isolate inhibited at 78.1 ± 3.06% and R-isolate inhibited at 64.76 ± 9.02% compared to the positive control (63.81 ± 1.15%), which led to increased suppression of S. Typhimurium accordingly. Tairu and R isolates were tested for their antibacterial ability against S. Typhimurium. Both R and Tairu isolates displayed strong inhibition zones (27 ± 0.06 mm, 23 ± 0.06 mm) respectively.
Conclusion: These findings suggest that the anti-invasion activities of HK-LAB R and Tairu may correlate to their bactericidal effects that serve to protect the host from infection.
期刊介绍：
The Iranian Journal of Microbiology (IJM) is an international, multi-disciplinary, peer-reviewed journal that provides rapid publication of the most advanced scientific research in the areas of basic and applied research on bacteria and other micro-organisms, including bacteria, viruses, yeasts, fungi, microalgae, and protozoa concerning the development of tools for diagnosis and disease control, epidemiology, antimicrobial agents, clinical microbiology, immunology, Genetics, Genomics and Molecular Biology. Contributions may be in the form of original research papers, review articles, short communications, case reports, technical reports, and letters to the Editor. Research findings must be novel and the original data must be available for review by the Editors, if necessary. Studies that are preliminary, of weak originality or merely descriptive as well as negative results are not appropriate for the journal. Papers considered for publication must be unpublished work (except in an abstract form) that is not under consideration for publication anywhere else, and all co-authors should have agreed to the submission. Manuscripts should be written in English.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
