Wang D, Li Q, Gong Y, Yuan Y. The association between vacA or cagA status and eradication outcome of Helicobacter pylori infection: A meta-analysis.
PLoS One 2017;
12:e0177455. [PMID:
28493953 PMCID:
PMC5426689 DOI:
10.1371/journal.pone.0177455]
[Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 04/27/2017] [Indexed: 12/14/2022] Open
Abstract
Background
H. pylori virulence factors, especially vacA and cagA are important in gastroduodenal disease pathogenesis and affect cure rates. This meta-analysis aimed to clarify the association between vacA or cagA status and eradication outcome of H. pylori infection.
Methods
A literature search was performed using electronic databases to identify studies. Twenty-six prospective studies were determined eligible. Meta-analytical techniques were conducted to calculate eradication rates and pooled relative ratios (RR).
Results
The eradication rate was greater approximately 10% in vacA s1 compared with vacA s2 infected patients, and the pooled RR was 1.164 (95%CI: 1.040–1.303, P = 0.008). A significant association existed between vacA s1 and higher eradication rates in Europe (RR: 1.203, 95%CI: 1.003–1.442, P = 0.046) and Asia (RR: 1.187, 95%CI: 1.028–1.371, P = 0.020), in triple therapy patients (RR: 1.175, 95%CI: 1.012–1.365, P = 0.035). Eradication rates were similar for vacA m1 and m2 genotypes (RR: 0.981, 95%CI: 0.891–1.080, P = 0.690), whereas they were higher by approximately 8% in cagA-positive compared with cagA-negative infected patients, with a pooled RR of 1.094 (95%CI: 1.025–1.168, P = 0.007). A significant association existed between cagA-positive and increased eradication rates in Europe (RR: 1.138, 95%CI: 1.000–1.295, P = 0.049) and Asia (RR: 1.118, 95%CI: 1.051–1.190, P<0.001), in using PCR (RR: 1.232, 95%CI: 1.142–1.329, P<0.001) and protein chips (RR: 1.200, 95%CI: 1.060–1.359, P = 0.004), in triple therapy patients (RR: 1.090, 95%CI: 1.006–1.181, P = 0.034).
Conclusions
Evidence indicates that infection with vacA s1, cagA-positive strains, but not vacA s2, cagA-negative, is more conducive to H. pylori eradication.
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