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Published on: March 18, 2014
Retinoid receptors and the induction of apoptosis in canine osteosarcoma cells
S H Hong1, E Ohashi, T Kadosawa
1Division of Veterinary Medical Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan.
Abstract:
Retinoids, all-trans-retinoic acid (ATRA) and 9-cis-retinoic acid (9-cis-RA), induced morphological changes and apoptosis-like cell death characterized by cell shrinkage, chromatin condensation and nuclear disintegration in three canine osteosarcoma cells, OOS, HOS and POS, at a concentration of 10(-5) M. Both retinoid receptors, RARs and RXRs, were identified in these cells. 9-cis-RA bound to both the RXRs and the RARs, whereas ATRA bound to only the RARs in these cells. Those results indicate that the induction of apoptosis in canine osteosarcoma cells may be mediated by the specific control of RARs and RXRs.
Insights
All-trans-retinoic acid (ATRA) and 9-cis-retinoic acid (9-cis-RA) induced apoptosis in canine osteosarcoma cells. These retinoids
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Canine osteosarcoma is an aggressive bone cancer.
- Retinoids are vitamin A derivatives with potential anti-cancer properties.
- Understanding retinoid mechanisms in cancer is crucial for therapeutic development.
Purpose of the Study:
- To investigate the effects of all-trans-retinoic acid (ATRA) and 9-cis-retinoic acid (9-cis-RA) on canine osteosarcoma cells.
- To identify the roles of retinoid receptors (RARs and RXRs) in mediating these effects.
Main Methods:
- Treatment of canine osteosarcoma cell lines (OOS, HOS, POS) with ATRA and 9-cis-RA at 10(-5) M.
- Morphological assessment for apoptosis-like cell death.
- Identification and binding analysis of retinoid receptors (RARs and RXRs).
Main Results:
- Both ATRA and 9-cis-RA induced apoptosis-like cell death, including cell shrinkage and nuclear disintegration.
- RARs and RXRs were present in all tested canine osteosarcoma cells.
- 9-cis-RA bound to both RARs and RXRs, while ATRA bound only to RARs.
Conclusions:
- Retinoids, specifically ATRA and 9-cis-RA, effectively induce apoptosis in canine osteosarcoma cells.
- The specific binding of retinoids to RARs and RXRs suggests these receptors mediate the apoptotic effects.
- Targeting RARs and RXRs may represent a therapeutic strategy for canine osteosarcoma.
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