[Role of Helicobacter pylori infection and use of NSAIDs in the etiopathogenesis of upper gastrointestinal bleeding]

Altered cytokine expression in Helicobacter pylori infected patients with bleeding duodenal ulcer

Objective

Peptic ulcer disease is a condition in which an important role has infection with H. pylori. The most common complication of peptic ulcer is bleeding. The presence of H. pylori triggers local and systemic cytokine signaling which may affect processes such as healing, gastric or duodenal rupture, and carcinogenesis. In this study, we examined the concentrations of IL-1β, IL-6, IL-10, TNF, TGF-β and IL-17A in serum by enzyme immunoassay and their mRNA expressions in periulcer biopsies obtained from patients with bleeding peptic ulcer by means of real-time-PCR.

Results

We have shown that pro-inflammatory IL-6 and TNF concentrations in serum were significantly higher in patients who were infected with H. pylori, while the concentrations of TGF-β and IL-17A were significantly lower compared to non-infected subjects. IL-17A expression in periulcer mucosa was significantly higher in patients who were infected with H. pylori, while the expression of other cytokines, there was no significant difference compared to non-infected controls. Considering higher serum concentrations in non-infected subjects and higher IL-17A expression in mucosal tissue of infected patients, our data support the studies that found IL-17A has protective role in eradication of H. pylori infection in infected patients.

Electronic supplementary material

The online version of this article (10.1186/s13104-019-4310-4) contains supplementary material, which is available to authorized users.

Proteomic profiling of Helicobacter pylori treated with celecoxib

AIM: To perform a proteomic investigation of the effect of celecoxib on Helicobacter pylori (H. pylori).

METHODS: Total proteins of untreated and celecoxib-treated H. pylori 26695 were extracted and separated by 2-dimensionals polyacrylamide gel electrophoresis (2-DE). Differential protein expression was detected using computer-assisted image analysis. Differential proteins were identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) and matrix-assisted laser desorption/ionization time-of-flight-tandem mass spectrometry (MALDI-TOF-MS/MS). The levels of mRNA expression were measured by real-time polymerase chain reaction.

RESULTS: Seventeen differentially expressed spots were detected between untreated and celecoxib-treated H. pylori 26695. Seven spots were positively identified as three proteins: heat shock protein 60 (HSP60), elongation factor TU (EF-TU) and gamma-glutamyltranspeptidase (GGT). The protein expression of HSP60, GGT, and EF-TU, and mRNA expression of GGT and EF-TU were down-regulated (0.07 ± 0.06 vs 1.01 ± 0.16; 0.31 ± 0.13 vs 0.98 ± 0.01, both P < 0.05), while the mRNA expression of HSP60 was up-regulated in the presence of celecoxib (1.85 ± 0.26 vs 1.07 ± 0.27, P < 0.05).

CONCLUSION: Celecoxib could down-regulate the protein expression of HSP60, GGT and EF-TU and mRNA expression of GGT and EF-TU in H. pylori; however, the mRNA expression of HSP60 was up-regulated. These results suggest that celecoxib might interfere with the pathogenicity of H. pylori.

Time trends in incidence of peptic ulcer bleeding and associated risk factors in Norway 1985-2008

Objective:

The aim of this study was to examine time trends in the incidence of peptic ulcer bleeding and risk factors in a defined geographical area in Norway.

Material and methods:

Retrospective data were collected for 306 patients with bleeding peptic ulcers admitted to one hospital during the 1985–1986, 1995–1996, and 2007–2008 periods.

Results:

The incidence in 1985–1986 was 52/100,000 and in 2007–2008 was 45/100,000. In the group aged 20–75 years, the incidence decreased by 54% from 54/100000 in 1985–1986 to 25/100000 in 2007–2008 (P = 0.001) and increased by 49% in the group aged >75 years from 272/100000 to 406/100000 (P = 0.0001). The use of aspirin or nonsteroidal anti-inflammatory steroid drugs (NSAIDs) was 31% in 1985–1986 and increased to 67% in 2007–2008 (P = 0.004). In patients using aspirin or NSAIDs, Helicobacter pylori was present in 73% in 1995–1996 and in 51% in 2007–2008. H. pylori infection declined from 84% to 52% between 1995–1996 and 2007–2008.

Conclusions:

The incidence rate of peptic ulcer bleeding did not change between 1985–1986 and 2007–2008, but decreased in the age group ≤75 years and increased in the age group >75 years. The use of low-dose aspirin and NSAIDs increased substantially over time, and H. pylori infection was still present in 51% of these patients in 2007–2008.