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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Clin+Nutr
2007 ; 86
(3
): 743-51
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The relation of magnesium and calcium intakes and a genetic polymorphism in the
magnesium transporter to colorectal neoplasia risk
#MMPMID17823441
Dai Q
; Shrubsole MJ
; Ness RM
; Schlundt D
; Cai Q
; Smalley WE
; Li M
; Shyr Y
; Zheng W
Am J Clin Nutr
2007[Sep]; 86
(3
): 743-51
PMID17823441
show ga
BACKGROUND: Mean magnesium intake in the US population does not differ from that
in East Asian populations with traditionally low risks of colorectal cancer and
other chronic diseases, but the ratio of calcium to magnesium (Ca:Mg) intake is
much higher in the US population. Transient receptor potential melastatin 7
(TRPM7) is a newly found gene essential to magnesium absorption and homeostasis.
OBJECTIVE: We aimed to test whether the association of colorectal polyps with
intake of calcium, magnesium, or both and Thr1482Ile polymorphism in the TRPM7
gene is modified by the Ca:Mg intake. DESIGN: Included in the study were a total
of 688 adenoma cases, 210 hyperplastic polyp cases, and 1306 polyp-free controls
from the Tennessee Colorectal Polyp Study. RESULTS: We found that total magnesium
consumption was linked to a significantly lower risk of colorectal adenoma,
particularly in those subjects with a low Ca:Mg intake. An inverse association
trend was found for hyperplastic polyps. We also found that the common Thr1482Ile
polymorphism was associated with an elevated risk of both adenomatous and
hyperplastic polyps. Moreover, this polymorphism significantly interacted with
the Ca:Mg intake in relation to both adenomatous and hyperplastic polyps. The
subjects who carried >or=1 1482Ile allele and who consumed diets with a high
Ca:Mg intake were at a higher risk of adenoma (odds ratio: 1.60; 95% CI: 1.12,
2.29) and hyperplastic polyps (odds ratio: 1.85; 95% CI: 1.09, 3.14) than were
the subjects who did not carry the polymorphism. CONCLUSION: These findings, if
confirmed, may provide a new avenue for the personalized prevention of magnesium
deficiency and, thus, colorectal cancer.