α-klotho as a regulator of calcium homeostasis

Akihiro Imura, Yoshihito Tsuji, Miyahiko Murata, Ryota Maeda, Koji Kubota, Akiko Iwano, Chikashi Obuse, Kazuya Togashi, Makoto Tominaga, Naoko Kita, Ken Ichi Tomiyama, Junko Iijima, Yoko Nabeshima, Makio Fujioka, Ryo Asato, Shinzo Tanaka, Ken Kojima, Juichi Ito, Kazuhiko Nozaki, Nobuo HashimotoTetsufumi Ito, Takeshi Nishio, Takashi Uchiyama, Toshihiko Fujimori, Yo Ichi Nabeshima*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

374 Scopus citations

Abstract

α-klotho was identified as a gene associated with premature aging-like phenotypes characterized by short lifespan. In mice, we found the molecular association of α-Klotho (α-Kl) and Na+,K +-adenosine triphosphatase (Na+,K+-ATPase) and provide evidence for an increase of abundance of Na+,K +-ATPase at the plasma membrane. Low concentrations of extracellular free calcium ([Ca2+]e) rapidly induce regulated parathyroid hormone (PTH) secretion in an α-Kl- and Na+,K +-ATPase-dependent manner. The increased Na+ gradient created by Na+,K+-ATPase activity might drive the transepithelial transport of Ca2+ in cooperation with ion channels and transporters in the choroid plexus and the kidney. Our findings reveal fundamental roles of α-Kl in the regulation of calcium metabolism.

Original languageEnglish
Pages (from-to)1615-1618
Number of pages4
JournalScience
Volume316
Issue number5831
DOIs
StatePublished - 2007/06/15

ASJC Scopus subject areas

  • General

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