Association of Helicobacter pylori enrichment in colorectal adenoma tissue on clinical and pathological features of adenoma.

OBJECTIVE: To investigate the enrichment of Helicobacter pylori (Hp) in adenoma tissue of patients with colorectal adenoma, and analyze the correlation between the enrichment and the clinical and pathological characteristics of colorectal adenoma. METHODS: The data of 1,622 patients undergoing gastrointestinal endoscopy in the Endoscopy Center of Wenzhou Integrated Traditional Chinese and Western Medicine Hospital affiliated to Zhejiang University of Traditional Chinese Medicine from January 2019 to June 2021 were retrospectively collected. The general data, gastric Hp infection, clinical and pathological features of colorectal adenoma, methylene blue staining of adenoma Hp, immunohistochemistry of adenoma Hp and immunofluorescence staining of adenoma TLR5 protein. were compared between the colorectal adenoma group (743 cases) and the control group (879 cases). RESULTS: There were 361 gastric Hp positive cases in the colorectal adenoma group, with a positive rate of 48.59%, and 331 gastric Hp positive cases in the control group, with a positive rate of 37.66%, and the difference was statistically significant (P < 0.001). Gastric Hp infection significantly correlates with the Hp enrichment in colorectal adenomas (OR: 28.449; 95%CI: 18.188-44.500; P < 0.001). Moreover, we found that Hp enrichment in colorectal adenomas was correlated with the diameter, pathological type, and malignancy of adenoma (OR: 3.536; 3.652; 2.833; all P < 0.001). Expression TLR5 protein was also increased in Hp-enriched adenoma tissue. CONCLUSION: There is a correlation between gastric Hp infection and intestinal Hp enrichment. The intestinal Hp enrichment significantly correlates with the clinical and pathological characteristics of colorectal adenomas, and its tumor-promoting effect may be related to the up-regulation of mucosal TLR5 expression.

LncRNA H19 gene rs2839698 polymorphism is associated with a decreased risk of colorectal cancer in a Chinese Han population: A case-control study.

BACKGROUND: Long non-coding RNA (lncRNA) H19 is involved in the carcinogenesis, progression, and metastasis of colorectal cancer (CRC). Recently, a few studies explored the relationship between lncRNA H19 gene rs2839698 polymorphism and CRC risk, but with conflicting findings. MATERIALS AND METHODS: A case-control study with 315 CRC cases and 441 controls was designed in a Chinese population. Genotyping was performed using PCR-RFLP. RESULTS: It was found rs2839698 polymorphism was associated with a decreased risk of CRC (AA vs GG: OR, 0.73; 95% CI, 0.54-0.98; P = .037; A vs G: OR, 0.78; 95% CI, 0.63-0.96; P = .021). Stratified analyses indicated this positive association was also significant in the non-smokers (AA vs GG: OR, 0.49; 95% CI, 0.25-0.93; P = .029), non-drinkers, those aged ≥ 60 years, and overweight individuals (BMI ≥ 24). In addition, rs2839698 polymorphism was also related to the lymph node metastasis (AA vs GG: OR, 0.43; 95% CI, 0.21-0.88; P = .019) and tumor size (AA vs GG: OR, 0.42; 95% CI, 0.20-0.88; P = .020) for patients with CRC. CONCLUSION: To sum up, the lncRNA H19 gene rs2839698 polymorphism decreases the risk of CRC in Chinese individuals, especially among the non-smokers, non-drinkers, individuals aged ≥ 60 years, and overweight individuals (BMI ≥ 24). Thus, the lncRNA H19 gene rs2839698 polymorphism might be an important biomarker and diagnostic marker for predicting the susceptibility to CRC in Chinese Han population.