I don't have any direct info re: mineralocorticoid effect on renal reabsorbtion of calcium, however the interaction of sodium and calcium has been studied as it is important in kidney disease, for example kidney stones, and osteoporosis as well. Here is an article on an excellent site that discusses some of the significant aspects of sodium/calcium regulation: http://kidneystones.uchicago.edu/does-too-much-protein-incre....
