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Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Physiol+Sci 2017 ; 67 (1): 151-162 Nephropedia Template TP
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Expression of the TRPM6 in mouse placental trophoblasts; potential role in maternal-fetal calcium transport #MMPMID27043350
Suzuki Y; Watanabe M; Saito CT; Tominaga M
J Physiol Sci 2017[Jan]; 67 (1): 151-162 PMID27043350show ga
The placenta is required to transport calcium (Ca(2+)) from mother to fetus during fetal bone mineralization. In an attempt to clarify the molecular basis of Ca(2+) entry for this transport, we identified TRPM6 as a candidate for apical Ca(2+) entry pathway. TRPM6 mRNA increased during the last 4 days of pregnancy, coinciding with fetal bone mineralization in mice. TRPM6 mRNA and protein was localized in the trophoblasts in labyrinth where the maternal-fetal Ca(2+) transport occurs. In patch-clamp recordings, we observed TRPM6/TRPM7-like currents in mouse trophoblasts after starting fetal bone mineralization but not before mineralization. Plasma membrane Ca(2+) permeability was significantly increased in TRPM6/TRPM7 expressed HEK293 cells under physiological Mg(2+) and ATP concentration but not in TRPM6 or TRPM7 homomer-expressing cells. These results suggest that TRPM6 is functionally expressed in mouse placental trophoblasts, implicating in maternal-fetal Ca(2+) transport likely with TRPM7, which might enable to sustain fetal bone mineralization.