Journal List > Korean J Gastroenterol > v.61(5) > 1007083

Kim, Song, Shin, Kim, Na, Boo, Choi, Cho, Kim, and Song: Clarithromycin-resistant Helicobacter pylori Associated with 23S rRNA Point Mutations in Jeju Island

Abstract

Background/Aims

The point mutations in 23S rRNA gene accounts for the majority of the clarithromycin resistance of Helicobacter pylori. This study aimed to investigate the association between the clarithromycin-resistance of H. pylori and the failure of primary H. pylori eradication therapy in Jeju Island.

Methods

Between April 2011 and October 2012, 6,937 patients underwent endoscopy, and H. pylori infection was evaluated in 2,287 patients (33.0%). Total of 110 patients with H. pylori infection were treated with proton pump inhibitor (PPI)-based triple therapy. The result of eradication was evaluated with urea breath test, histology and PCR which were conducted 4 weeks from the last dose of medicine.

Results

The patients who had point mutations were 33 (26.0%). A2142G and A2143G mutations were observed in 10 patients (7.9%) and 23 patients (18.1%). Among 110 patients treated with PPI-based triple therapy, the success rate of the eradication therapy was 52.7% (58/110) and 70.7% (58/82) by intention-to-treat and per-protocol analysis, respectively. Fifteen of the 24 patients who failed the eradication therapy showed point mutations; 1 patient (4.2%) showed A2142G mutation and 14 patients (58.3%) showed A2143G mutation. Patients with A2143G mutation H. pylori showed higher failure rate of 87.5%. Patients with A2142G mutation H. pylori showed similar failure rate compared to those of the patients with wild type H. pylori.

Conclusions

In Jeju Island, the frequency of 23S rRNA point mutations is similar (26.0%) with other regions of Korea (15.8–31.3%). A2143G mutation is associated with the failure of H. pylori eradication.

References

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Fig. 1.
Detection of point mutation at A2143G and A2142G in 23S rRNA gene by polymerase chain reaction products. M, marker; NC, negative control; PC1, PC2, clarithromycin resistance (PC1: A2143G, PC2: A2142G). Lane 28, A2143G mutation; lane 29, wild type; lane73, A2142G mutation.
kjg-61-252f1.tif
Fig. 2.
Results of Helicobacter pylori eradication with primary triple theraphy. PPI, proton pump inhibitor.
kjg-61-252f2.tif
Table 1.
Demographic Characteristics of Patients
  Characteristic Patient (n=127)
Age (yr) 52±14 (15–82)
Sex (male:female) 79 (62.2):48 (37.8)
BMI (kg/m2) 23.8±3.0
Indication of Helicobacter pylori eradication  
Active or healing gastric ulcer 11 (8.7)
Gastric ulcer scar 6 (4.7)
Active or healing duodenal ulcers 6 (4.7)
Duodenal ulcer scar 74 (58.3)
Endoscopic therapy of gastric adenoma 18 (14.2)
Endoscopic therapy of early gastric cancer 4 (3.1)
Endoscopic therapy of gastric hyperplastic polyp 6 (4.7)
Peptic ulcer bleeding 1 (0.8)
Functional dyspepsia 1 (0.8)
Underlying disease  
Diabetes mellitus 12 (9.4)
Hypertension 26 (20.5)
Hyperlipidemia 19 (15.0)
Social history  
Smoking 54 (42.5)
Alcohol 71 (55.9)

Values are presented as mean±SD (range) or n (%).

Table 2.
Comparison of Clinical Characteristics of Patients according to Helicobacter pylori Point Mutation
Variable Wild type (n=94) A2142G (n=10) A2143G (n=23) p-value
Age (yr) 50±14 53±19 59±11 0.028
Sex       <0.005
Male (n=79) 64 (81.0) 9 (11.4) 6 (7.6)  
Female (n=48) 30 (62.5) 1 (2.1) 17 (35.4)  
BMI (kg/m2) 23.7±2.8 24.5±2.6 23.8±3.6 0.752
Diabetes mellitus (n=12) 8 (66.7) 1 (8.3) 3 (25.0) 0.799
Hypertension (n=26) 16 (61.5) 3 (11.5) 7 (26.9) 0.266
Hyperlipidemia (n=19 9) 13 (68.4) 1 (5.3) 5 (26.3) 0.572

Values are presented as mean±SD or n (%).

Table 3.
Comparison of First Helicobacter pylori Eradication Results (n=82)
Variable Success group (n=58) Failure group (n=24) p-value
Age (yr) 52±12 59±15 0.027
Sex      0.443
Male (n=53) 39 (73.6) 14 (26.4)  
Female (n=29) 19 (65.5) 10 (34.5)  
BMI (kg/m2) 24.2±2.7 22.5±3.5 0.020
Social history      
Smoking (n=35) 23 (65.7) 12 (34.3) 0.389
Alcohol (n=47) 35 (74.5) 12 (25.5) 0.389
Compliance     0.743
100% (n=78) 55 (70.5) 23 (29.5)  
80–100% (n=2) 2 (100) 0 (0.0)  
50–80% (n=0) 0 (0.0) 0 (0.0)  
<50% (n=2) 1 (50.0) 1 (50.0)  
Point mutation     <0.001
Wild type (n=59) 50 (84.7) 9 (15.3)  
A2142G (n=7) 6 (85.7) 1 (14.3)  
A2143G (n=16) 2 (12.5) 14 (87.5)  

Values are presented as mean±SD or n (%).

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