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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 Med+Hypotheses
2010 ; 75
(3
): 315-8
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Does a higher ratio of serum calcium to magnesium increase the risk for
postmenopausal breast cancer?
#MMPMID20371155
Sahmoun AE
; Singh BB
Med Hypotheses
2010[Sep]; 75
(3
): 315-8
PMID20371155
show ga
Breast cancer is the most commonly diagnosed cancer among United States (US)
women. Established risk factors explain only about 13% of breast cancer incidence
among women in the US. Thus, the cause of most cases of breast cancer remains
unknown. In postmenopausal women, serum calcium (Ca) and serum magnesium (Mg)
play an important role in skeletal health, cell proliferation and cancer. Mg is
essential for DNA duplication and repair and Mg deficiency favors DNA mutations
leading to carcinogenesis. Dietary intake of Mg in the US is less than the
recommended amount, and the deficit is more pronounced in older individuals where
gastrointestinal and renal mechanisms for Mg conservation are not as efficient.
Furthermore, healthy postmenopausal women are frequently recommended to take
supplemental Ca, but not Mg and vitamin D to maintain bone and overall health.
Most women with hormone sensitive breast cancer are recommended to take aromatase
inhibitors, which causes bone loss and thus are generally prescribed Ca and
vitamin D, but not Mg. Although the association between serum Ca and breast
cancer risk remains controversial, we hypothesize that this may be because Mg
levels have not been accounted for. Mg level directly influences transient
receptor potential melastatin 7 (TRPM7) related Ca influx, calcium-adenosine
triphosphatase (Ca-ATP) levels, and cell proliferation, and thereby could lead to
cancer. Thus a high serum Ca/Mg ratio is more appropriate and alterations in this
ratio could lead to increased development of new and recurrent breast cancer.