Exploring Vitamin D Deficiency and IGF Axis Dynamics in Colorectal Adenomas

Area of Science:

• Oncology
• Endocrinology
• Nutritional Science

Background:

• Colorectal cancer (CRC) is a leading cause of cancer mortality, with colorectal adenomas (CRAs) as its precursors.
• Identifying modifiable risk factors, including vitamin D status and the insulin-like growth factor (IGF) axis, is vital for CRC prevention strategies.

Purpose of the Study:

• To investigate the association between serum levels of vitamin D metabolites (cholecalciferol, calcidiol, calcitriol) and IGF axis components (IGF-1, IGFBP-3) with the risk of colorectal adenomas (CRAs).

Main Methods:

• A case-control study involving 85 participants (53 CRA patients, 32 controls) who underwent colonoscopy.
• Serum concentrations of vitamin D3 (cholecalciferol), calcidiol, calcitriol, IGF-1, and IGFBP-3 were measured and analyzed for associations with CRA status.

Main Results:

• Lower serum cholecalciferol levels were identified as a significant risk factor for CRA (OR = 4.63, p = 0.004).
• No significant differences in calcidiol or calcitriol levels were found between groups, though calcidiol deficiency was prevalent.
• In CRA patients, IGF-1 levels showed inverse correlations with age, calcitriol, and IGFBP-3.

Conclusions:

• Lower cholecalciferol may serve as a potential biomarker for CRA risk, particularly when calcidiol levels are not informative.
• Further research is warranted to elucidate the interplay between calcitriol, the active vitamin D metabolite, and the IGF axis in colorectal carcinogenesis.