Elevated serum concentrations of insulin and glucose increase risk of recurrent colorectal adenomas

Andrew Flood ¹, Volker Mai , Ruth Pfeiffer

⁰Division of Epidemiology and Community Health and the Cancer Center, University of Minnesota, Minneapolis, Minnesota, USA. flood009@umn.edu

Gastroenterology +

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October 2, 2007

View abstract on PubMed

Summary

Elevated insulin and glucose levels are linked to a higher risk of colorectal adenoma recurrence. Increased glucose is particularly associated with a greater risk of advanced adenoma recurrence.

Area Of Science

Endocrinology
Gastroenterology
Oncology

Background

Insulin resistance indicators are suspected to promote colorectal cancer.
Understanding the link between metabolic factors and colorectal adenoma recurrence is crucial for prevention strategies.

Purpose Of The Study

To investigate the association between fasting serum insulin and glucose levels and the risk of colorectal adenoma recurrence.
To determine if baseline metabolic markers predict future adenoma development.

Main Methods

Serum samples from 750 participants (375 with recurrent adenoma, 375 without) in the Polyp Prevention Trial were analyzed.
Fasting insulin and glucose concentrations were measured at baseline and over 4 years.
Multivariable logistic regression models were used to calculate odds ratios (ORs) and 95% confidence intervals (CIs), adjusting for covariates.

Main Results

Higher quartiles of both insulin and glucose were associated with increased adenoma recurrence risk (OR, 1.56 for insulin; OR, 1.49 for glucose).
The association between glucose and recurrence was more pronounced for advanced adenomas (OR, 2.43).
In individuals without a family history of colorectal cancer, elevated glucose showed a stronger association with adenoma recurrence, especially for advanced adenomas (OR, 3.52).

Conclusions

Increased fasting insulin and glucose levels are associated with a higher risk of colorectal adenoma recurrence.
Elevated glucose levels, in particular, are linked to an increased risk of developing advanced adenomas.
These findings highlight the potential role of metabolic dysregulation in colorectal cancer progression.

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