Two biochemical indices of mouse bone formation are increased,in vivo, in response to calcitonin
✍ Scribed by John R. Farley; Susan L. Hall; Sandra Herring; Nanine M. Tarbaux
- Publisher
- Springer
- Year
- 1992
- Tongue
- English
- Weight
- 1006 KB
- Volume
- 50
- Category
- Article
- ISSN
- 1432-0827
No coin nor oath required. For personal study only.
✦ Synopsis
In a series of four studies, adult female Swiss-Webster mice were used to measure the effects of salmon calcitonin on two biochemical indices of local and systematic bone formation: (1) skeletal alkaline phosphatase activity--in serum and in extracts of calvaria and tibiae, and (2) calvarial collagenase-digestible protein synthesis--measured, acutely, in vitro. Subcutaneous calcitonin doses ranged from 50 to 400 mU/mouse/day (0.95-18.1 U/kg/day), and treatment schedules were continuous (daily) for 2-14 days, acute, or intermittent (2 days/week for 6 weeks). The effects of calcitonin on these bone formation indices (skeletal alkaline phosphatase and collagenase-digestible protein synthesis) were biphasic with respect to dose and treatment time, being increased in response to short-term, low-dose treatment, but not long-term, continuous treatment. The effects of long-term intermittent calcitonin treatment were dose-dependent increases in skeletal alkaline phosphatase in calvaria and serum (r = 0.948, P less than 0.02, and r = 0.960, P less than 0.01, respectively).