| Literature DB >> 29618612 |
Yi Fan1,2, Weiqing Liu1,2, Ruiye Bi2,3, Michael J Densmore1, Tadatoshi Sato1, Michael Mannstadt3, Quan Yuan2, Xuedong Zhou2, Hannes Olauson4, Tobias E Larsson4, Hakan R Toka5, Martin R Pollak5, Edward M Brown6, Beate Lanske7,3.
Abstract
The pathogenesis of parathyroid gland hyperplasia is poorly understood, and a better understanding is essential if there is to be improvement over the current strategies for prevention and treatment of secondary hyperparathyroidism. Here we investigate the specific role of Klotho expressed in the parathyroid glands (PTGs) in mediating parathyroid hormone (PTH) and serum calcium homeostasis, as well as the potential interaction between calcium-sensing receptor (CaSR) and Klotho. We generated mouse strains with PTG-specific deletion of Klotho and CaSR and dual deletion of both genes. We show that ablating CaSR in the PTGs increases PTH synthesis, that Klotho has a pivotal role in suppressing PTH in the absence of CaSR, and that CaSR together with Klotho regulates PTH biosynthesis and PTG growth. We utilized the tdTomato gene in our mice to visualize and collect PTGs to reveal an inhibitory function of Klotho on PTG cell proliferation. Chronic hypocalcemia and ex vivo PTG culture demonstrated an independent role for Klotho in mediating PTH secretion. Moreover, we identify an interaction between PTG-expressed CaSR and Klotho. These findings reveal essential and interrelated functions for CaSR and Klotho during parathyroid hyperplasia.Entities:
Keywords: FGF23; chronic kidney disease; conditional knockout; secondary hyperparathyroidism; tdTomato
Mesh：
Substances：
Year: 2018 PMID： 29618612 PMCID： PMC5910831 DOI： 10.1073/pnas.1717754115
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205