Efficacy of Tegoprazan for Improving the Susceptibility of Antimicrobial Agents against Antibiotic-Resistant Helicobacter pylori
- Author:
Jung Won LEE
1
;
Nayoung KIM
;
Ryoung Hee NAM
;
Jeong Eun YU
;
Joo Hee SON
;
Sun Min LEE
;
Dong Ho LEE
Author Information
- Publication Type:Original Article
- From:Gut and Liver 2021;15(1):53-60
- CountryRepublic of Korea
- Language:English
-
Abstract:
Background/Aims:Favorable outcomes of potassium-competitive acid blocker (PCAB)-containing eradication therapy have been reported. In fact, tegoprazan, a recently developed PCAB, was presumed to show good eradication efficacy even for resistant Helicobacter pylori. We aimed to investigate the anti-H. pylori efficacy of tegoprazan compared with that of vonoprazan.
Methods:A total of 220 resistant clinical H. pylori isolates were utilized. The anti-H. pylori efficacy of PCABs was determined by evaluating the minimum inhibitory concentrations (MICs) of clarithromycin, fluoroquinolone, metronidazole, and amoxicillin in combination with vonoprazan or tegoprazan by the agar dilution method. The impact of the mutations responsible for resistance development, such as 23S rRNA, gyrA, rdxA, frxA, and pbp1 mutations, was also analyzed.
Results:H. pylori growth was significantly inhibited in a medium containing 1 μg/mL clarithromy-cin with tegoprazan (128 μg/mL). The MICs of clarithromycin (46.3%), fluoroquinolone (46.7%), metronidazole (55.6%), and amoxicillin (34.5%) against resistant H. pylori isolates improved after tegoprazan administration. Tegoprazan demonstrated more frequent susceptibility acquisitionwith metronidazole than with vonoprazan (20.6% vs 4.7%, p=0.014). However, there were nosignificant differences depending on the mutational status of each antimicrobial agent.
Conclusions:Tegoprazan administration may improve the susceptibility of antimicrobial-resistant H. pylori, independent of acid suppression.
