ISSN:
1432-0827
Keywords:
Osteoclast
;
Bone resorption
;
Parathyroid hormone-related protein
;
Calcitonin
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
,
Physics
Notes:
Abstract Parathyroid hormone-related protein (PTHrP) fragments 107–111, 107–138, and 107–139 were all found to be without consistent significant inhibitory effect on the resorptive activity of isolated rat and chick osteoclasts over the dose range 10-13 M-10-9 M. In the rat, these results contrasted with a strong and significant inhibition (100%) by calcitonin. Our results differ from that previously reported for C-terminal fragments of PTHrP by Fenton et al. [1–3], who noted up to a 70% inhibition of resorptive activity of isolated rat or chick osteoclasts at femtomolar doses and greater. It is possible that the lack of response observed in our osteoclast assays is due to unknown variables in the bone slice assay that influence the responsiveness of isolated osteoclasts to these fragments.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00298996
