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DNA damage evaluation of hydroxyapatite on fibroblast cell L929 using the single cell gel electrophoresis assay
The Medical Journal of Malaysia ; : 170-171, 2004.
Article in Malayalam | WPRIM | ID: wpr-629950
ABSTRACT
Hydroxyapatite is the main component of the bone which is a potential biomaterial substance that can be applied in orthopaedics. In this study, the biocompatibility of this biomaterial was assessed using an in vitro technique. The cytotoxicity and genotoxicity effect of HA2 and HA3 against L929 fibroblast cell was evaluated using the MTT Assay and Alkaline Comet Assay respectively. Both HA2 and HA3 compound showed low cytotoxicity effect as determined using MTT Assay. Cells viability following 72 hours incubation at maximum concentration of both HA2 and HA3 (200 mg/ml) were 75.3 +/- 8.8% and 86.7 +/- 13.1% respectively. However, the cytotoxicity effect of ZnSO4.7H2O as a positive control showed an IC50 values of 46 mg/ml (160 microM). On the other hand, both HA2 and HA3 compound showed a slight genotoxicity effect as determined using the Alkaline Comet Assay following incubation at the concentration 200 mg/ml for 72 hours. This assay has been widely used in genetic toxicology to detect DNA strand breaks and alkali-labile site. The percentage of the cells with DNA damage for both substance was 27.7 +/- 1.3% and 15.6 +/- 1.0% for HA2 and HA3 respectively. Incubation of the cells for 24 hours with 38 microg/ml (IC25) of positive control showed an increase in percentage of cells with DNA damage (67.5 +/- 0.7%). In conclusion, our study indicated that both hydroxyapatite compounds showed a good biocompatibility in fibroblast cells.
Subject(s)
Full text: Available Index: WPRIM (Western Pacific) Main subject: Prostheses and Implants / Biocompatible Materials / DNA Damage / Cell Survival / Bone Substitutes / Hydroxyapatites / L Cells / Mutagenicity Tests Language: Malayalam Journal: The Medical Journal of Malaysia Year: 2004 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Prostheses and Implants / Biocompatible Materials / DNA Damage / Cell Survival / Bone Substitutes / Hydroxyapatites / L Cells / Mutagenicity Tests Language: Malayalam Journal: The Medical Journal of Malaysia Year: 2004 Type: Article