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Khangai A, Akada J, Saruuljavkhlan B, Gantuya B, Azzaya D, Oyuntsetseg K, Davaadorj D, Uchida T, Matsumoto T, Yamaoka Y. Utilization of an Automated Latex Agglutination Turbidity Assay for Assessing Gastric Mucosal Alteration during Helicobacter pylori Infection. Gut Liver 2024; 18:60-69. [PMID: 37720994 PMCID: PMC10791506 DOI: 10.5009/gnl220464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/21/2023] [Accepted: 02/07/2023] [Indexed: 09/19/2023] Open
Abstract
Background/Aims : A latex agglutination turbidity (LA) assay to test for serum antibodies has been approved in Japan and Korea for mass screening of Helicobacter pylori infection. In this study, we evaluated the LA assay for diagnosing H. pylori infection and predicting gastric mucosal changes in a Mongolian population. Methods : In total, 484 individuals were classified into H. pylori-positive (n=356) and H. pylori-negative (n=128) groups, as determined by histology and H. pylori culture. Results : The best cutoff, sensitivity, and specificity values for the LA assay were 18.35 U/mL, 74.2%, and 65.6%, respectively. The LA values in the atrophic gastritis group were statistically higher than those in the other groups (healthy, chronic gastritis, intestinal metaplasia, and gastric cancer, p<0.0001). The cutoff value to distinguish the atrophic gastritis group from the other four groups was 32.0 U/mL, and its area under the curve was 0.673, which was the highest among the E-plate, pepsinogen (PG) I, PG II, and PG I/II ratio tests in our data. The odds ratios for atrophic gastritis determined by the LA assay and PG I test in multiple logistic regression were 2.5 and 1.9, respectively, which were significantly higher than for the other tests. Conclusions : The LA assay can determine the risk of atrophic gastritis, which in turn is a considerable risk factor for gastric cancer. We propose using this assay in combination with the PG I/II ratio to avoid missing gastric cancer patients who have a low LA value (less than 32.0 U/mL).
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Affiliation(s)
- Ayush Khangai
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan
- The Gastroenterology Center, The First Central Hospital of Mongolia, Ulaanbaatar, Mongolia
| | - Junko Akada
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan
| | - Batsaikhan Saruuljavkhlan
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan
| | - Boldbaatar Gantuya
- Department of Gastroenterology, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
- Endoscopy Unit, Mongolia-Japan Teaching Hospital, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Dashdorj Azzaya
- Department of Gastroenterology, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
- Endoscopy Unit, Mongolia-Japan Teaching Hospital, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Khasag Oyuntsetseg
- Department of Gastroenterology, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
- Endoscopy Unit, Mongolia-Japan Teaching Hospital, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Duger Davaadorj
- Department of Gastroenterology, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
- Endoscopy Unit, Mongolia-Japan Teaching Hospital, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Tomohisa Uchida
- Department of Advanced Medical Sciences, Oita University Faculty of Medicine, Oita, Japan
| | - Takashi Matsumoto
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan
| | - Yoshio Yamaoka
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan
- Research Center for Global and Local Infectious Diseases (RCGLID), Oita University, Oita, Japan
- Department of Medicine, Gastroenterology and Hepatology Section, Baylor College of Medicine, Houston, TX, USA
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Cho JH, Jin SY, Park S. Scoring model for discriminating gastric cancer risk in patients with negative serum pepsinogen and anti-Helicobacter pylori antibody results. J Gastroenterol Hepatol 2021; 36:3345-3353. [PMID: 34328237 DOI: 10.1111/jgh.15630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 07/07/2021] [Accepted: 07/16/2021] [Indexed: 12/09/2022]
Abstract
BACKGROUND The ABC test measures serum pepsinogen and anti-Helicobacter pylori IgG antibody levels to predict precancerous conditions in the stomach and gastric cancer. However, a limitation of this test is that the gastric cancer risk is not negligible in patients with a negative result. METHODS Based on their ABC results, 1157 patients were classified into Groups A (n = 392), B (n = 479), C (n = 247), and D (n = 39). In Group A, 24.2% of patients had atrophic gastritis and/or intestinal metaplasia and had thus been incorrectly assigned to Group A. Patients in Group A were then assigned to derivation (n = 236) and validation (n = 156) cohorts by 3:2 random sampling. Logistic regression analyses were performed to identify the factors discriminating between a correct (true) and incorrect (false) Group A classification. RESULTS A 4-point discriminative model was constructed based on a high-negative H. pylori IgG antibody titer and the patient's age (50-64 and ≥65 years). The areas under the receiver operating characteristic curve for the derivation and validation cohorts were 0.868 and 0.894, respectively. In the validation cohort, the addition of a discriminative model score ≥2 to the ABC method showed a similar accuracy for predicting gastric cancer risk compared with the ABC method alone (93.8% vs. 92.4%). CONCLUSION The 4-point discriminative model may help identify patients with a normal serological test who are nonetheless at risk of developing gastric cancer.
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Affiliation(s)
- Jun-Hyung Cho
- Digestive Disease Center, Soonchunhyang University Hospital, Seoul, South Korea
| | - So-Young Jin
- Department of Pathology, Soonchunhyang University Hospital, Seoul, South Korea
| | - Suyeon Park
- Department of Medical Biostatistics, Soonchunhyang University Hospital, Seoul, South Korea
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Tshibangu-Kabamba E, Phuc BH, Tuan VP, Fauzia KA, Kabongo-Tshibaka A, Kayiba NK, Rosas-Aguirre A, Devleesschauwer B, Cimuanga-Mukanya A, Ngoma Kisoko PDJ, Matsumoto T, Akada J, Disashi GT, Mumba Ngoyi D, Kido Y, Speybroeck N, Yamaoka Y. Assessment of the diagnostic accuracy and relevance of a novel ELISA system developed for seroepidemiologic surveys of Helicobacter pylori infection in African settings. PLoS Negl Trop Dis 2021; 15:e0009763. [PMID: 34499649 PMCID: PMC8455143 DOI: 10.1371/journal.pntd.0009763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 09/21/2021] [Accepted: 08/25/2021] [Indexed: 01/18/2023] Open
Abstract
Beside diagnostic uncertainties due to the lack of a perfect gold standard test for Helicobacter pylori infection, the diagnosis and the prevalence estimation for this infection encounter particular challenges in Africa including limited diagnostic tools and specific genetic background. We developed and evaluated the accuracy of an enzyme-linked immunosorbent assay (ELISA) system tailored for H. pylori genetics in Africa (HpAfr-ELISA). Strains belonging to main genetic populations infecting Africans were exploited as sources for whole-cell antigens to establish in-house the ELISA system. A phase II unmatched case-control study explored the diagnostic accuracy of the HpAfr-ELISA using a training set of samples collected from dyspeptic patients from Kinshasa, the Democratic Republic of Congo (DRC) who had been tested with invasive standard tests (i.e., histology, culture, and rapid urease test) in 2017. Then the assay was cross-validated through a community-based survey assessing the prevalence of H. pylori and associated factors in 425 adults from Mbujimayi, DRC in 2018. Bayesian inferences were used to deal with statistical uncertainties of estimates (true prevalence, sensitivity, and specificity) in the study population. At its optimal cut-off-value 20.2 U/mL, the assay achieved an estimated sensitivity of 97.6% (95% credible interval [95%CrI]: 89.2; 99.9%) and specificity of 90.5% (95%CrI: 78.6; 98.5). Consistent outcomes obtained at repeated tests attested the robustness of the assay (negative and positive agreements always > 70%). The true prevalence of H. pylori was estimated 53.8% [95%CrI: 42.8; 62.7%]. Increasing age (adjusted odds ratio [aOR] > 1.0 [95% confidence interval (CI): > 1.0; 1.1]; p<0.001), overcrowding households (aOR = 3.2 [95%CI: 2.0; 5.1]; p<0.001), and non-optimal hand hygiene (aOR = 4.5 [95%CI: 2.0; 11.4]; p = 0.001) were independently associated with the H. pylori-seropositivity. The novel ELISA system has demonstrated good diagnostic accuracy and potential usefulness for management and mitigation strategies for H. pylori infection in African settings.
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Affiliation(s)
- Evariste Tshibangu-Kabamba
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, Oita, Japan
- Department of Internal Medicine, Faculty of Medicine, University of Mbujimayi, Mbujimayi, DR Congo
- Research Center for Infectious Diseases Sciences & Department of Parasitology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - Bui Hoang Phuc
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, Oita, Japan
| | - Vo Phuoc Tuan
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, Oita, Japan
- Department of Endoscopy, Cho Ray Hospital, Cho Ray, Vietnam
| | - Kartika Afrida Fauzia
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, Oita, Japan
- Institute of Tropical Disease, Universitas Airlangga, Surabaya, Indonesia
- Department of Public Health and Preventive Medicine, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
| | | | - Nadine Kalenda Kayiba
- Research Institute of Health and Society (IRSS), Université catholoique de Louvain, Brussels, Belgium
- Department of Public Health, Faculty of Medicine, University of Mbujimayi, Mbujimayi, DR Congo
| | - Angel Rosas-Aguirre
- Research Institute of Health and Society (IRSS), Université catholoique de Louvain, Brussels, Belgium
| | - Brecht Devleesschauwer
- Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium
- Department of Veterinary Public Health and Food Safety, Ghent University, Merelbeke, Belgium
| | - Alain Cimuanga-Mukanya
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, Oita, Japan
- Department of Internal Medicine, Faculty of Medicine, University of Mbujimayi, Mbujimayi, DR Congo
| | - Patrick de Jésus Ngoma Kisoko
- Department of Gastroenterology and Hepatology, Faculty of Medicine, University of Kinshasa, Kinshasa, DR Congo
- Department of Gastroenterology and Hepatology, General Referential Hospital of Bukavu, Bukavu, DR Congo
| | - Takashi Matsumoto
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, Oita, Japan
| | - Junko Akada
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, Oita, Japan
| | - Ghislain Tumba Disashi
- Department of Internal Medicine, Faculty of Medicine, University of Mbujimayi, Mbujimayi, DR Congo
| | - Dieudonné Mumba Ngoyi
- Department of Parasitology, National Institute of Biomedical Research, Kinshasa, DR Congo
| | - Yasutoshi Kido
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, Oita, Japan
- Research Center for Infectious Diseases Sciences & Department of Parasitology, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - Niko Speybroeck
- Research Institute of Health and Society (IRSS), Université catholoique de Louvain, Brussels, Belgium
| | - Yoshio Yamaoka
- Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, Oita, Japan
- Department of Medicine, Gastroenterology section, Baylor College of Medicine, Houston, Texas, United States of America
- Global Oita Medical Advanced Research Center for Health, Oita University, Yufu, Japan
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