Publication Date:
1996-08-02
Description:
The PTH/PTHrP receptor binds to two ligands with distinct functions: the calcium-regulating hormone, parathyroid hormone (PTH), and the paracrine factor, PTH-related protein (PTHrP). Each ligand, in turn, is likely to activate more than one receptor. The functions of the PTH/PTHrP receptor were investigated by deletion of the murine gene by homologous recombination. Most PTH/PTHrP receptor (-/-) mutant mice died in mid-gestation, a phenotype not observed in PTHrP (-/-) mice, perhaps because of the effects of maternal PTHrP. Mice that survived exhibited accelerated differentiation of chondrocytes in bone, and their bones, grown in explant culture, were resistant to the effects of PTHrP and Sonic hedgehog. These results suggest that the PTH/PTHrP receptor mediates the effects of Indian Hedgehog and PTHrP on chondrocyte differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lanske, B -- Karaplis, A C -- Lee, K -- Luz, A -- Vortkamp, A -- Pirro, A -- Karperien, M -- Defize, L H -- Ho, C -- Mulligan, R C -- Abou-Samra, A B -- Juppner, H -- Segre, G V -- Kronenberg, H M -- DK 47038/DK/NIDDK NIH HHS/ -- DK 47237/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1996 Aug 2;273(5275):663-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8662561" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
*Bone Development
;
Cartilage/*cytology/metabolism
;
Cell Differentiation
;
Cell Division
;
Cloning, Molecular
;
Culture Techniques
;
Feedback
;
Gene Deletion
;
Gene Targeting
;
Growth Plate/*cytology/metabolism
;
Hedgehog Proteins
;
Mice
;
Mice, Inbred C57BL
;
Osteoblasts/cytology
;
*Osteogenesis
;
Parathyroid Hormone
;
Parathyroid Hormone-Related Protein
;
Protein Biosynthesis
;
Proteins/pharmacology/physiology
;
Receptor, Parathyroid Hormone, Type 1
;
Receptors, Parathyroid Hormone/genetics/*physiology
;
Stem Cells
;
*Trans-Activators
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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