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Binding of calcitonin and calcitonin gene-related peptide to calvarial cells and renal cortical membranes.

Authors
  • Seitz, P K
  • Thomas, M L
  • Cooper, C W
Type
Published Article
Journal
Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research
Publication Date
Feb 01, 1986
Volume
1
Issue
1
Pages
51–56
Identifiers
PMID: 3509740
Source
Medline
License
Unknown

Abstract

Binding of calcitonin (CT) and calcitonin gene-related peptide (CGRP) to rat hemicalvariae and renal membranes was examined in an effort to determine whether CT and CGRP interact with the same bone cell binding site, and to see whether the binding pattern was similar for bone and renal cortex. Specific binding of 125I-salmon CT to rat calvariae was inhibited by unlabeled salmon, porcine, or human CT, but not by rat CGRP. Binding of 125I-rat CGRP to calvariae was inhibited by CGRP and high doses of salmon CT, but not by human or porcine CT. Binding of 125I-salmon CT to renal membranes was inhibited by unlabeled salmon CT or rat CGRP, but no specific binding of 125I-rat CGRP could be detected. The results suggest that separate bone cell receptors for CT and CGRP exist and that CGRP can interact with renal receptors for CT.

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