Effect of proton pump inhibitors on the detection of Helicobacter pylori in gastric biopsies.

Objective: To evaluate the diagnostic performance of different staining methods for Helicobacter pylori (H. pylori) in patients treated with proton pump inhibitors (PPI) Material and Methods: This is a retrospective study involving 75 gastric biopsies from patients with and without PPI therapy between October 2018 and September 2019. Slides were stained with hematoxylin and eosin (H&E); Giemsa and immunohistochemical staining (IHC) was done using polyclonal anti-H. pylori antibodies. Statistical analysis was performed to determine any association between the results of different staining methods and PPI consumption. Sensitivity, specificity and positive-negative predictive values of H&E and Giemsa stains were calculated. Results: Overall, H. pylori infection was detected in 33.3% of patients using IHC, 26.7% using H&E, and 28.0% via Giemsa staining. A strong correlation was found between PPI consumption and low H. pylori density detected via IHC (p-value=0.015) but not using H&E and Giemsa staining. The sensitivity of H&E and Giemsa was markedly reduced as a result of PPI consumption (57.1% to 18.2% vs. 85.7% to 27.3%, respectively). Conclusion: Identification of H. pylori using IHC in patients treated with PPI was superior to H&E and Giemsa stains. Both H&E and Giemsa stains showed a marked decrease in sensitivity in patients receiving PPI. The results indicate that IHC should be performed in patients with PPI therapy instead of H&E or Giemsa stains, and PPI should be discontinued for at least 14 days before the performance of endoscopy.

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Inhibitory effect of proton pump inhibitors against chemotaxis of Helicobacter pylori

Gastroenterology ◽

10.1016/s0016-5085(01)83260-1 ◽

2001 ◽

Vol 120 (5) ◽

pp. A655-A656

Author(s):

H NAKAMURA ◽

H YOSHIYAMA ◽

H YANAI ◽

M SHIRAL ◽

T NAKAZAWA ◽

...

Keyword(s):

Helicobacter Pylori ◽

Proton Pump Inhibitors ◽

Proton Pump ◽

Inhibitory Effect

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Different dose of new generation proton pump inhibitors for the treatment of Helicobacter pylori infection: A meta-analysis

International Journal of Immunopathology and Pharmacology ◽

10.1177/20587384211030397 ◽

2021 ◽

Vol 35 ◽

pp. 205873842110303

Author(s):

Wenwen Gao ◽

Xiang Zhang ◽

Yanhui Yin ◽

Shuwen Yu ◽

Lu Wang

Keyword(s):

Helicobacter Pylori ◽

Proton Pump Inhibitors ◽

Proton Pump ◽

Eradication Rate ◽

Standard Dose ◽

Statistical Significance ◽

High Dose ◽

Clarithromycin Resistance ◽

H Pylori ◽

New Generation

The evidence on whether high-dose new generation proton pump inhibitors (PPIs) including rabeprazole and esomeprazole achieve a higher eradication rate of Helicobacter pylori has not been assessed. The primary comparison was eradication and adverse events (AEs) rate of standard (esomeprazole 20 mg bid, rabeprazole 10 mg bid) versus high-dose (esomeprazole 40 mg bid, rabeprazole 20 mg bid) PPIs. Sub-analyses were performed to evaluate the eradication rate between Asians and Caucasians, clarithromycin-resistance (CAM-R) strains, and clarithromycin-sensitivity (CAM-S) strains of different dose PPIs. We conducted a literature search for randomized controlled trials comparing high-with standard-dose esomeprazole and rabeprazole for H. pylori eradication and AEs. A total of 12 trials with 2237 patients were included. The eradication rate of high-dose PPIs was not significantly superior to standard-dose PPIs regimens: 85.3% versus 84.2%, OR 1.09 (0.86–1.37), P = 0.47. The high dose induced more AEs than those of the standard dose, but didn’t reach statistical significance (OR 1.25, 95% CI: 0.99–1.56, P = 0.06). Subgroup analysis showed that the difference in eradication rate of PPIs between high- and standard-dose groups were not statistically significant both in Asians (OR 0.99, 95% CI 0.75–1.32, P = 0.97) and Caucasians (OR 1.27, 95% CI 0.84–1.92, P = 0.26). Furthermore, there were similar eradication rates in CAM-S (OR 1.2; 95% CI 0.58–2.5; P = 0.63) and CAM-R strains (OR 1.08; 95% CI 0.45–2.56; P = 0.87) between the standard-and high-dose groups. High and standard dosages of new generation of the PPIs showed similar H. pylori eradication rates and AEs as well as between Asian versus Caucasian populations, with or without clarithromycin-resistance. However, further studies are needed to confirm.

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Editorial: proton pump inhibitors, Helicobacter pylori and gastric cancer - the need for long-term follow-up

Alimentary Pharmacology & Therapeutics ◽

10.1111/apt.13504 ◽

2016 ◽

Vol 43 (5) ◽

pp. 647-648

Author(s):

E. J. Kuipers

Keyword(s):

Gastric Cancer ◽

Helicobacter Pylori ◽

Proton Pump Inhibitors ◽

Proton Pump ◽

Long Term Follow Up

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Long-term proton pump inhibitors and risk of gastric cancer development after treatment for Helicobacter pylori: a population-based study

Gut ◽

10.1136/gutjnl-2017-314605 ◽

2017 ◽

Vol 67 (1) ◽

pp. 28-35 ◽

Cited By ~ 161

Author(s):

Ka Shing Cheung ◽

Esther W Chan ◽

Angel Y S Wong ◽

Lijia Chen ◽

Ian C K Wong ◽

...

Keyword(s):

Gastric Cancer ◽

Helicobacter Pylori ◽

Proton Pump Inhibitors ◽

Proton Pump ◽

Proportional Hazards Model ◽

Absolute Risk ◽

Eradication Therapy ◽

Cox Proportional Hazards ◽

Cox Proportional Hazards Model

ObjectiveProton pump inhibitors (PPIs) is associated with worsening of gastric atrophy, particularly in Helicobacter pylori (HP)-infected subjects. We determined the association between PPIs use and gastric cancer (GC) among HP-infected subjects who had received HP therapy.DesignsThis study was based on a territory-wide health database of Hong Kong. We identified adults who had received an outpatient prescription of clarithromycin-based triple therapy between year 2003 and 2012. Patients who failed this regimen, and those diagnosed to have GC within 12 months after HP therapy, or gastric ulcer after therapy were excluded. Prescriptions of PPIs or histamine-2 receptor antagonists (H2RA) started within 6 months before GC were excluded to avoid protopathic bias. We evaluated GC risk with PPIs by Cox proportional hazards model with propensity score adjustment. H2RA was used as a negative control exposure.ResultAmong the 63 397 eligible subjects, 153 (0.24%) developed GC during a median follow-up of 7.6 years. PPIs use was associated with an increased GC risk (HR 2.44, 95% CI 1.42 to 4.20), while H2RA was not (HR 0.72, 95% CI 0.48 to 1.07). The risk increased with duration of PPIs use (HR 5.04, 95% CI 1.23 to 20.61; 6.65, 95% CI 1.62 to 27.26 and 8.34, 95% CI 2.02 to 34.41 for ≥1 year, ≥2 years and ≥3 years, respectively). The adjusted absolute risk difference for PPIs versus non-PPIs use was 4.29 excess GC (95% CI 1.25 to 9.54) per 10 000 person-years.ConclusionLong-term use of PPIs was still associated with an increased GC risk in subjects even after HP eradication therapy.

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