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1.
Med J Malaysia ; 59 Suppl B: 176-7, 2004 May.
Artigo em Inglês | MEDLINE | ID: mdl-15468875

RESUMO

Biomaterials intended for end-use application as bone-graft substitutes have to undergo safety evaluation. In this study, we investigated the in vitro cytotoxic effects especially to determine the mode of death of two hydroxyapatite compounds (HA2, HA3) which were synthesized locally. The methods used for cytotoxicity was the standard MTT assay whereas AO/PI staining was performed to determine the mode of cell death in HA treated L929 fibroblasts. Our results demonstrated that both HA2 and HA3 were not significantly cytotoxic as more than 75% cells after 72 hours treatment were viable. Furthermore, we found that the major mode of cell death in HA treated cells was apoptosis. In conclusion, our results demonstrated that these hydroxyapatite compounds are not cytotoxic where the mode of death was primarily via apoptosis.


Assuntos
Materiais Biocompatíveis/toxicidade , Substitutos Ósseos/toxicidade , Morte Celular/efeitos dos fármacos , Durapatita/toxicidade , Próteses e Implantes , Animais , Apoptose/efeitos dos fármacos , Células L , Camundongos
2.
Med. j. malaysia ; : 176-177, 2004.
Artigo em Ml | WPRIM | ID: wpr-629952

RESUMO

Biomaterials intended for end-use application as bone-graft substitutes have to undergo safety evaluation. In this study, we investigated the in vitro cytotoxic effects especially to determine the mode of death of two hydroxyapatite compounds (HA2, HA3) which were synthesized locally. The methods used for cytotoxicity was the standard MTT assay whereas AO/PI staining was performed to determine the mode of cell death in HA treated L929 fibroblasts. Our results demonstrated that both HA2 and HA3 were not significantly cytotoxic as more than 75% cells after 72 hours treatment were viable. Furthermore, we found that the major mode of cell death in HA treated cells was apoptosis. In conclusion, our results demonstrated that these hydroxyapatite compounds are not cytotoxic where the mode of death was primarily via apoptosis.


Assuntos
Apoptose/efeitos dos fármacos , Materiais Biocompatíveis/toxicidade , Substitutos Ósseos/toxicidade , Morte Celular/efeitos dos fármacos , Durapatita/toxicidade , Células L , Próteses e Implantes
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