Background: Since discovered in 1990, Cag A, a protein expressed by specific strains of Helicobacter pylori, was thought able to explain why only a few Helicobacter infected patients develop peptic diseases and gastric cancer. However, clinical trials provide discordant results.
Materials And Methods: In this study we evaluate Helicobacter pylori and Cag A seropositivity in 35 cancer affected patients, in 36 gastritis affected patients and in 40 healthy blood donors by means of two commercially available fluorescence enzyme-immunoessay (ELISA).
Results: Odds ratios determination strongly suggests that Cag A bearer Helicobacter strains play a pathogenetic role in gastric diseases (OR 4.23, 95% CI 3.22-5.24 for cancer versus healthy volunteers, OR 3.2, 95% CI 2.19-4.21 for gastritis versus asymptomatic patients), but is unable to demonstrate a direct carcinogenic activity (cancer-gastritis difference is not significant: OR 1.32, 95% CI 0.39-1.25).
Conclusions: Cag A seropositivity can be considered a risk factor for peptic disease, and only indirectly for gastric carcinoma. The paper also discuss some sampling, laboratory and statistical bias that can explain a wide eterogenity of the results reported in the literature.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Diffuse Cyclin D1 and SPINK1 Expression in Gastric Oxyntic Gland Neoplasms: Promising Diagnostic Markers Identified by Spatial Transcriptome Analysis.
Mod Pathol
January 2025
Department of Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan. Electronic address:
Oxyntic gland neoplasms typically arise in Helicobacter pylori-naïve stomachs and are composed predominantly of chief cells, with a smaller component of parietal cells. The pathologic diagnosis can be challenging due to minimal cellular atypia. Especially in biopsy specimens with limited tumor volume or when pathologists have limited experience in diagnosing this neoplasm, distinguishing it from normal oxyntic glands can be difficult, and no reliable diagnostic markers are currently available.
View Article and Find Full Text PDFExploring Bidirectional Causal Relationships between Antibody-Mediated Immune Responses to Infectious Agents and Systemic Lupus Erythematosus through Mendelian Randomization and Meta-Analyses.
Microb Pathog
January 2025
Department of Clinical Laboratory, The First People's Hospital of Lianyungang, The Affiliated Lianyungang Hospital of Xuzhou Medical University, The First Affiliated Hospital of Kangda College of Nanjing Medical University, Lianyungang, Jiangsu Province, China. Electronic address:
Background: Previous investigations into the causal relationship between infections and systemic lupus erythematosus (SLE) have yielded controversial results. This study delves into the bidirectional causal relationships between various infectious agents and SLE, employing two-sample Mendelian randomization (MR) from an immunological perspective.
Methods: Utilizing genome-wide association study (GWAS) data for 46 antibody-mediated immune responses (AMIRs) to 13 pathogens and three distinct SLE datasets, we employed Bayesian Weighted MR (BWMR) and inverse variance weighted (IVW) methods to ascertain causal links, supplemented by meta-analysis to resolve inconsistencies.
Antibiotic-free responsive biomaterials for specific and targeted Helicobacter pylori eradication.
J Control Release
January 2025
Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai 200433, China; Shanghai Key Laboratory of Nautical Medicine and Translation of Drugs and Medical Devices, Shanghai, China. Electronic address:
Gastric cancer is highly correlated with Helicobacter pylori (H. pylori) infection. Approximately 50 % of the population worldwide is infected with H.
View Article and Find Full Text PDFSuperior mesenteric artery syndrome: A rare cause of proximal bowel obstruction- Case report and literature review.
Int J Surg Case Rep
January 2025
Department of Pediatric Surgery, Kabul University of Medical Science, Maiwand Teaching Hospital, Kabul, Afghanistan. Electronic address:
Introduction And Importance: Superior mesenteric artery syndrome, or mesenteric root syndrome, is a rare cause of small bowel obstruction. Delay in diagnosis may lead to significant morbidity and mortality in pediatric patients across several age groups.
Case Presentation: We present a 10-year-old female child who has experienced numerous acute abdominal episodes since she was six years old.
rs762855 single nucleotide polymorphism modulates the risk for diffuse-type gastric cancer in females: a genome-wide association study in the Korean population.
Gastric Cancer
January 2025
Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Gyeonggi-Do, South Korea.
Background: Intestinal-type gastric cancer (IGC) and diffuse-type gastric cancer (DGC) exhibit different prevalence rates between sexes. While environmental factors like Helicobacter pylori infection and alcohol consumption contribute to these differences, they do not fully account for them, suggesting a role for host genetic factors.
Methods: We conducted a meta-analysis to explore associations between single nucleotide polymorphisms (SNPs) and the risk of IGC or DGC.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!