Evaluating the relationship between serum immunoglobulin G (IgG) and A (IgA) anti-CagA antibody and the cagA gene in patients with dyspepsia

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FAKHRE YASERI HASHEM; Baradaran Moghaddam Ali; SHEKARABI MEHDI; BARADARAN HAMID REZA; SOLTANI ARABSHAHI SEYED KAMRAN

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Journal: IRANIAN JOURNAL OF MICROBIOLOGY Year:2017 | Volume:9 | Issue:2 Page(s): 97-102

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Title

Evaluating the relationship between serum immunoglobulin G (IgG) and A (IgA) anti-CagA antibody and the cagA gene in patients with dyspepsia

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Keywords

cagA

IgG anti-CagA

IgA anti-CagA

Dyspepsia

Abstract

Background and Objectives: The cytotoxin-associated gene (cag) pathogenicity island is reported to be a major virulence factor of Helicobacter pylori infection. It is previously reported that the cagA-positive strains are more virulent, so it can be postulated that the cagA-positive gastritis will be more severe and the serum immunoglobulin G (IgG) and A (IgA) anti-CagA antibody titer will be higher. The aim of this study was to compare the relationship between IgG and IgA anti-CagA antibody and the cagA gene expression in patients with dyspepsia. Serum samples obtained from 130 dyspeptic patients with positive H. pylori in histological and Geimsa staining were tested for serum IgG and IgA anti-CagA antibody using the enzyme-linked immunosorbent Assay. The expression of the cagA gene was determined using PCR on the biopsy samples, taken via endoscopy. Results: In our material, the sensitivity of IgG anti-CagA antibody in identifying patients with a proven infection with the cagA-positive strains was 97. 67%, and the negative likelihood ratios was 0. 06. There was not significant correlation between serum IgA anti-CagA and the expression of the cagA gene among the dyspeptic patients. Conclusion: The IgG antibody titer was significantly higher in our patients with the cagA-positive H. pylori strain. However, in daily practice, the level of the IgG antibody titer cannot predict whether or not an individual carries a cagA-positive H. pylori strain, because there is a major overlap in the IgG antibody titer between the cagA-positive and cagA-negative patients.

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APA: Copy

FAKHRE YASERI, HASHEM, Baradaran Moghaddam, Ali, SHEKARABI, MEHDI, BARADARAN, HAMID REZA, & SOLTANI ARABSHAHI, SEYED KAMRAN. (2017). Evaluating the relationship between serum immunoglobulin G (IgG) and A (IgA) anti-CagA antibody and the cagA gene in patients with dyspepsia. IRANIAN JOURNAL OF MICROBIOLOGY, 9(2), 97-102. SID. https://sid.ir/paper/315497/en

Vancouver: Copy

FAKHRE YASERI HASHEM, Baradaran Moghaddam Ali, SHEKARABI MEHDI, BARADARAN HAMID REZA, SOLTANI ARABSHAHI SEYED KAMRAN. Evaluating the relationship between serum immunoglobulin G (IgG) and A (IgA) anti-CagA antibody and the cagA gene in patients with dyspepsia. IRANIAN JOURNAL OF MICROBIOLOGY[Internet]. 2017;9(2):97-102. Available from: https://sid.ir/paper/315497/en

IEEE: Copy

HASHEM FAKHRE YASERI, Ali Baradaran Moghaddam, MEHDI SHEKARABI, HAMID REZA BARADARAN, and SEYED KAMRAN SOLTANI ARABSHAHI, “Evaluating the relationship between serum immunoglobulin G (IgG) and A (IgA) anti-CagA antibody and the cagA gene in patients with dyspepsia,” IRANIAN JOURNAL OF MICROBIOLOGY, vol. 9, no. 2, pp. 97–102, 2017, [Online]. Available: https://sid.ir/paper/315497/en

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