Universität zu Köln

Klein, Sebastian ORCID: 0000-0002-2188-9377, Mentrup, Birgit, Timmen, Melanie, Sherwood, Joanna, Lindemann, Otto, Fobker, Manfred, Kronenberg, Daniel ORCID: 0000-0001-6807-7328, Pap, Thomas, Raschke, Michael J. and Stange, Richard ORCID: 0000-0003-0807-3151 (2020). Modulation of Transient Receptor Potential Channels 3 and 6 Regulates Osteoclast Function with Impact on Trabecular Bone Loss. Calcif. Tissue Int., 106 (6). S. 655 - 665. NEW YORK: SPRINGER. ISSN 1432-0827

Full text not available from this repository.

Abstract

Enhanced osteoclast formation and function is a fundamental cause of alterations to bone structure and plays an important role in several diseases impairing bone quality. Recent work revealed that TRP calcium channels 3 and 6 might play a special role in this context. By analyzing the bone phenotype of TRPC6-deficient mice we detected a regulatory effect of TRPC3 on osteoclast function. These mice exhibit a significant decrease in bone volume per tissue volume, trabecular thickness and -number together with an increased number of osteoclasts found on the surface of trabecular bone. Primary bone marrow mononuclear cells from TRPC6-deficient mice showed enhanced osteoclastic differentiation and resorptive activity. This was confirmed in vitro by using TRPC6-deficient RAW 264.7 cells. TRPC6 deficiency led to an increase of TRPC3 in osteoclasts, suggesting that TRPC3 overcompensates for the loss of TRPC6. Raised intracellular calcium levels led to enhanced NFAT-luciferase reporter gene activity in the absence of TRPC6. In line with these findings inhibition of TRPC3 using the specific inhibitor Pyr3 significantly reduced intracellular calcium concentrations and normalized osteoclastic differentiation and resorptive activity of TRPC6-deficient cells. Interestingly, an up-regulation of TRPC3 could be detected in a cohort of patients with low bone mineral density by comparing micro array data sets of circulating human osteoclast precursor cells to those from patients with high bone mineral density, suggesting a noticeable contribution of TRP calcium channels on bone quality. These observations demonstrate a novel regulatory function of TRPC channels in the process of osteoclastic differentiation and bone loss.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Klein, Sebastian UNSPECIFIED orcid.org/0000-0002-2188-9377 UNSPECIFIED Mentrup, Birgit UNSPECIFIED UNSPECIFIED UNSPECIFIED Timmen, Melanie UNSPECIFIED UNSPECIFIED UNSPECIFIED Sherwood, Joanna UNSPECIFIED UNSPECIFIED UNSPECIFIED Lindemann, Otto UNSPECIFIED UNSPECIFIED UNSPECIFIED Fobker, Manfred UNSPECIFIED UNSPECIFIED UNSPECIFIED Kronenberg, Daniel UNSPECIFIED orcid.org/0000-0001-6807-7328 UNSPECIFIED Pap, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Raschke, Michael J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stange, Richard UNSPECIFIED orcid.org/0000-0003-0807-3151 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-332481
DOI:	10.1007/s00223-020-00673-8
Journal or Publication Title:	Calcif. Tissue Int.
Volume:	106
Number:	6
Page Range:	S. 655 - 665
Date:	2020
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1432-0827
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CA2+ CHANNEL; TRPC3; DIFFERENTIATION; HYPERCALCEMIA; ACTIVATION; EXPRESSION; FRACTURES; MUTATION; WOMEN; RISK Multiple languages Endocrinology & Metabolism Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/33248