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A room H. pylori치료의 쟁점 : Preneoplastic status에서의 Helicobacter pylori 치료: 찬성 의견
장영운 대한소화기학회 2002 대한소화기학회 세미나집 Vol.2002 No.-
위축과 장상피화생, 특히 장상피화생은 H. pylori 감염뿐만 아니라 bile reflux, high salt diet, alcohol 등에 의하여 초래되는 것이므로 H. pylori 제균만으로는 복귀가 매우 제한적일 수밖에 없다. 그리고 이러한 preneoplastic 병변이 줄기세포의 stable somatic 돌연변이의 결과로 일어난 경우에는 어떤 치료로도 이들을 복귀시킬 수 없는 소위 걈oint of no return궮넘어서 버린 것으로 생각할 수 있다. 그러므로 위축과 장상피화생이 있는 경우에 H. pylori를 제균하는 목적은 이들을 조직학적으로 복귀시킨다는 목적 이외에 염증을 해결하여 oxygen radical에 의한 DNA 손상을 줄이고, cell turnover를 감소시키며, 저위산증 환자에서는 위산분비를 증가시키고, ascorbic acid 분비를 증가시키는 목적이 있다. 왜냐하면 이러한 변화는 multifactorial, multistep의 성격을 가진 위암발생과정에 다각도로 도움이 될 수 있는 chemoprevention의 성격을 가지고 있기 때문이다.
장영운,고원진,오치혁,박유민,오신주,문정락,조준형,김정욱,장재영 대한내과학회 2019 The Korean Journal of Internal Medicine Vol.34 No.5
Background/Aims: The eradication rate of the first-line triple therapy (a proton pump inhibitor, clarithromycin, and amoxicillin) for Helicobacter pylori infection has gradually decreased in Korea. We evaluated whether clinical parameters, clarithromycin resistance, and CYP2C19 genotype can affect the eradication failure. Methods: A total of 203 patients with H. pylori-positive chronic gastritis were consecutively enrolled. They received clarithromycin-based triple therapy for 7 days. A clarithromycin resistance test was performed by detection of A2142G and A2143G point mutations in H. pylori 23S rRNA. The CYP2C19 genotype was examined for polymorphism G681A of exon 5 and G636A of exon 4 by polymerase chain reaction with restriction fragment length polymorphism. Eradication was assessed by a 13C-urea breath test 4 weeks after treatment. Results: Of 203 patients, 190 completed the study. The eradication rate was 64.0% according to intention-to-treat analysis and 68.4% by per-protocol analysis. CYP2C19 genotypes were identified as follows: 75 poor metabolizers, 75 intermediate metabolizers, and 40 rapid metabolizers. Nonetheless, this polymorphism was not significantly associated with eradication failure (p = 0.682). Clarithromycin resistance was detected in 33/190 patients (17.4%), and their eradication rate was zero. Clarithromycin resistance (odds ratio [OR], 19.13; 95% confidence interval [CI], 9.35 to 35.09) and female gender (OR, 1.73; 95% CI, 1.15 to 4.25) were significantly associated with eradication failure. The other clinical parameters such as age, cigarette smoking, alcohol intake, the body mass index, hypertension, and diabetes were not significantly associated with eradication. Conclusions: Clarithromycin resistance and female gender are factors affecting H. pylori eradication failure in patients with chronic gastritis.