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Nia FF, Ghasemi A, Saeidi J, Mohtashami M. Inhibitory activity of Limosilactobacillus reuteri isolated from camel milk against Helicobacter pylori effects in human gastric epithelial cells. Biotechnol Appl Biochem 2023; 70:1941-1953. [PMID: 37475587 DOI: 10.1002/bab.2501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 07/01/2023] [Indexed: 07/22/2023]
Abstract
This study aimed to evaluate anti-Helicobacter pylori effects of Limosilactobacillus reuteri 2892 (L. reuteri 2892) isolated from camel milk in GC cell lines (AGS and MKN). From 15 camel milk samples, 132 microbial strains were isolated. Based on microbial and biochemical analysis, 11 potential probiotic candidates were selected. The potential probiotic candidates were assayed for anti-H. pylori activity, and the strain with the highest anti-H. pylori activity was identified genotypically. Based on 16S rDNA sequencing, the selected strain with the best activity against H. pylori (inhibition zone = 15.5 ± 0.8) belonged to the Lactobacillus reuteri strain 2892. Cell treatment with H. pylori HC-113 inhibits gene expression of Claudin-4, ZO-1, MUC5AC, and MUC2 in gastric cells, which are attenuated by L. reuteri 2892. The simulative effects of H. pylori HC-113 on the cell migration and invasion of gastric cells were lost when cells were cotreated with L. reuteri 2892. Cell treatment with H. pylori HC-113 promoted cell death, whereas cotreatment with L. reuteri 2892 markedly decreased necrotic and late apoptotic cells. The present study demonstrates that L. reuteri 2892 has potent anti-H. pylori effects and thus can be considered as an alternative protective agent against inflammatory effects of H. pylori in gastric cells.
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Affiliation(s)
- Fatemeh Forooghi Nia
- Department of Microbiolgy, College of Science, Agricultuer and Modern Technology, Shiraz Branch, Islamic Azad University, Shiraz, Iran
| | - Ahmad Ghasemi
- Department of Basic Sciences, Neyshabur University of Medical Sciences, Neyshabur, Iran
- Healthy Ageing Research Centre, Neyshabur University of Medical Sciences, Neyshabur, Iran
| | - Jafar Saeidi
- Department of Physiology, School of Basic Science, Neyshabur Branch, Islamic Azad University, Neyshabur, Iran
| | - Mahnaz Mohtashami
- Department of Microbiology, School of Basic Science, Neyshabur Branch, Islamic Azad University, Neyshabur, Iran
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Losurdo G, Francioso F, Pricci M, Girardi B, Russo F, Riezzo G, D'Attoma B, Bleve MA, Iannone A, Celiberto F, Ierardi E, DI Leo A. A prospective study on Helicobacter pylori rapid urease test false negativity: is it time for its use in restricted situations? Minerva Gastroenterol (Torino) 2023; 69:382-387. [PMID: 35708038 DOI: 10.23736/s2724-5985.22.03207-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Rapid urease test (RUT) is a diagnostic tool for Helicobacter pylori (H. pylori) diagnosis, based on the ability of the bacterium to produce urease. Despite it is considered simple, fast, and cheap, some conditions may cause false negativity. Therefore, the aim of this study was to compare RUT with currently recommended tests for H. pylori diagnosis. METHODS We enrolled consecutive patients who underwent upper endoscopy with histology, RUT, and urea breath test (UBT). Delta over baseline (DOB) >4% was considered positive for UBT. Diagnosis of infection was achieved when at least two tests were positive. The rate of false positivity of RUT was computed, and DOB value in RUT+ versus RUT- was compared by Mann-Whitney Test. RESULTS One hundred and sixteen consecutive patients with H. pylori infection were recruited. The male/female ratio was 35/81 and the mean age 45.2±13.1. Twenty-five patients (21.5%) were RUT-, despite being positive at both histology and UBT. On the other hand, in only two patients UBT and histology had discordant results. A full concordance of the three tests was observed in 89 patients (76.7%). DOB, additionally, was significantly higher in RUT+ patients (39.2±24.2%) than RUT- ones (26.3±18.5%; P=0.005). CONCLUSIONS RUT shows false negativity rate higher than 20%. Moreover, the RUT-negative patients showed a lower DOB at UBT, which is an indirect indicator of intragastric bacterial load. Therefore, it is presumable that H. pylori low amount may be a concurrent cause of false negativity. This study suggests that RUT-based H. pylori detection should be restricted to some specific conditions.
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Affiliation(s)
- Giuseppe Losurdo
- Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy -
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy -
| | - Federica Francioso
- Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | | | | | - Francesco Russo
- National Institute of Gastroenterology, IRCCS Saverio de Bellis, Castellana Grotte, Bari, Italy
| | - Giuseppe Riezzo
- National Institute of Gastroenterology, IRCCS Saverio de Bellis, Castellana Grotte, Bari, Italy
| | - Benedetta D'Attoma
- National Institute of Gastroenterology, IRCCS Saverio de Bellis, Castellana Grotte, Bari, Italy
| | - Maria A Bleve
- Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Andrea Iannone
- Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Francesca Celiberto
- Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Enzo Ierardi
- Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Alfredo DI Leo
- Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
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Ribaldone DG, Pellicano R, Fagoonee S, Actis GC. Modulation of the gut microbiota: opportunities and regulatory aspects. Minerva Gastroenterol (Torino) 2023; 69:128-140. [PMID: 35179341 DOI: 10.23736/s2724-5985.22.03152-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The human gut is an intensively colonized organ containing microorganisms that can be health-promoting or pathogenic. This feature led to the development of functional foods aiming to fortify the former category at the expense of the latter. Since long, cultured products, including probiotics fortification, have been used for humans as live microbial feed additions. This review presents some of the microbes used as probiotics and discusses how supplementation with probiotics may help initiate and/or restore eubiotic composition of gut microbiota. Additionally, it considers safety and regulatory aspects of probiotics.
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Affiliation(s)
| | | | - Sharmila Fagoonee
- Institute of Biostructures and Bioimaging (CNR) c/o Molecular Biotechnology Center, Turin, Italy
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