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Motility and resorption: osteoclastic activity in vitro.
Anatomy and Embryology
|January 1, 1984
Summary
Salmon calcitonin (SCT) inhibits osteoclast (OC) motility on non-biological surfaces but not dentine resorption. This suggests motility inhibition is unreliable for assessing osteoclast resorptive capacity.
Area of Science:
- Cell Biology
- Biomineralization
- Skeletal Physiology
Background:
- Osteoclasts (OCs) are crucial for bone resorption.
- Salmon calcitonin (SCT) is known to inhibit OC activity.
- Assessing OC resorptive capacity is vital in skeletal research.
Purpose of the Study:
- To investigate the effect of SCT on rabbit osteoclast motility and resorption on different substrates.
- To determine if OC motility inhibition reliably indicates resorptive capability.
Main Methods:
- Rabbit OCs were cultured on glass, plastic, or sperm whale dentine (SWD).
- Cells were treated with varying doses of SCT.
- Resorption was quantified using stereophotogrammetry, measuring lacunae volume and surface area.
Main Results:
- SCT inhibited motility and ruffling on non-biological substrates.
- Resorption on SWD occurred despite SCT treatment.
- Quantified resorption rates: highest hourly rate 570 micron3/h, average 165 micron3/h, mean total volume 3,885 micron3, mean plan area 1,450 micron2.
Conclusions:
- Osteoclast motility inhibition by SCT is not a reliable indicator of resorptive capacity on biological substrates like dentine.
- Osteoclasts maintain resorptive function on dentine even when motility is affected by SCT.