Low serum pancreatic amylase levels as a novel latent risk factor for colorectal adenoma in nonalcohol drinkers

Background and Aim

Obesity, insulin resistance, and metabolic alterations increase the risk of colorectal cancer and adenoma (CRA). Nonalcoholic fatty liver disease (NAFLD) or pancreatic disease (NAFPD) shares many risk factors with CRA that may have significant roles in its development; however, the relationship between CRA and NAFLD/NAFPD remains unclear.

Methods

This cross-sectional study recruited 712 eligible participants without current drinking who had undergone total colonoscopy as part of a health checkup. These participants were classified into a CRA group (n = 236) and a control group (n = 439), which consisted of individuals without CRA and a history of polyp resection. NAFLD and NAFPD were diagnosed based on abdominal ultrasonography findings.

Results

NAFLD was observed more frequently in individuals with CRA than in the control group (55.9% vs. 41.6%, P < 0.01). There was no significant association between NAFPD and CRA; however, serum pancreatic amylase (P-amylase) levels were significantly lower in individuals with CRA. Although NAFLD was one of the factors increasing the presence of CRA (OR, 1.50; 95% CI, 1.07–2.10), low P-amylase levels were significantly associated with the presence of CRA (OR, 1.73; 95% CI, 1.04–2.88) independent of age, sex, current smoking, obesity, metabolic alterations including insulin resistance, and NAFLD.

Conclusions

Low serum P-amylase levels were a possible independent risk factor for CRA in the present study. The latent pancreatic exocrine-endocrine-gut relationship was considered a novel pathway involved in obesity-related CRA development, in non-alcoholic individuals.

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