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Experimental study on cytotoxicity of zirconium compounds in vitro (1)

Experimental study on cytotoxicity of zirconium compounds in vitro (1)

Nihon Eiseigaku Zasshi. Japanese Journal of Hygiene 43(4): 895-900

The effect of three zirconium (Zr) compounds, zirconium oxychloride (ZrOCl2), zirconium oxide (ZrO2) and zirconium silicate (ZrSiO4) on the viability and DNA synthesis of cultured spleen cells from C57BL mice was studied in vitro. The viability of spleen cells was determined by the trypan blue stain method using cells cultured in a CO2 incubator at 37.degree.C for 1-4 days. The degree of DNA synthesis of spleen cells was determined by 3H-thymidine incorporation into spleen cells. The viability of spleen cells treated with ZrOCl2 exhibited similar changes at concentrations of 1-40 .mu.M and decreased at concentrations of 80-400 .mu.M, as compared with that of control cells. On the other hand, no effects of ZrO2 and ZrSiO4 on the viability of spleen cells were recognized at concentrations of 1-400 .mu.M. The degree of 3H-thymidine incorporation into spleen cells treated with ZrO2 or ZrSiO4 was not different from that of control cells. In the case of spleen cells treated wth ZrOCl2, it was enhanced at concentrations of 1-20 .mu.M and was inhibited at concentrations of 40-400 .mu.M as compared with the control cells. The results of these studies in vitro suggest the following: 1) The effect of Zr on the cytotoxicity of mouse spleen cells depends upon the solubility of Zr salts. 2) ZrOCl2 was found to be weakly mitogenic for lymphocytes at a narrow concentration (1-20 .mu.M; max, about 10 .mu.M) range.

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Accession: 007332674

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PMID: 3249421

DOI: 10.1265/jjh.43.895

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