Calcium Supplementation and Colonic Cell Growth
Author Information
Author(s): J.H. Kleibeuker, J.W.M. Welberg, N.H. Mulder, R. van der Meer, A. Cats, A.J. Limburg, W.M.T. Kreumer, M.J. Hardonk, E.G.E. de Vries
Primary Institution: University Hospital Groningen
Hypothesis
Does oral calcium supplementation affect epithelial cell proliferation in the sigmoid colon of patients with adenomatous polyps?
Conclusion
Oral calcium supplementation increases epithelial cell proliferation in the sigmoid colon of patients with adenomatous polyps.
Supporting Evidence
- Median labelling index increased from 6.1% before to 8.7% after 12 weeks of calcium supplementation.
- The increase in proliferation was mainly in the basal part of the crypts.
- Labelling index remained elevated at 8.8% after one year of continued calcium supplementation.
Takeaway
When patients with certain types of polyps took calcium supplements, their colon cells grew more than before.
Methodology
Seventeen patients received 1.5g of calcium daily for 12 weeks while on a calcium-constant diet, and their epithelial proliferation was measured through biopsies.
Potential Biases
Potential bias due to lack of randomization and control group.
Limitations
The study lacked a control group and relied on self-reported dietary compliance.
Participant Demographics
17 patients, 11 men and 6 women, mean age 56 (range 39-69) years.
Statistical Information
P-Value
p<0.02
Statistical Significance
p<0.02
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