硒对人羊膜细胞和猴肾细胞核酸合成的影响

作者采用细胞培养技术和同位素技术,研究了硒对人羊膜细胞和猴肾细胞的核酸合成的影响。将细胞悬液和不同浓度的亚硒酸钠溶液共同孵育24小时后,加入氚标记的DNA和RNA合成的前身物质,通过测定细胞内同位素量,可推测细胞合成DNA和RNA的速度。结果表明,硒能促进细胞的DNA和RNA合成,并且是细胞生长所必需的微量元素。

INFLUENCE OF SELENIUM ON THE SYNTHESIS OF NUCLEIC ACIDS IN HUMAN AMNION CELLS AND MONKEY KIDNEY CELLS

The effect of selenium on the synthesis of nucleic acids in human am-nion cells and monkey kidey cells was studied by the techniques of cell culture and radioisotope assay. The cells were cultured in a medium containing varied dosages of sodium selenite for 24 hours at 37℃ in a CO2 incubator (5% CO2), then 3H-labeled precursors of DNA and RNA were added. The synthetic activity of DNA and RNA was determined by assaying the incorporation amount of radioisotope. The result suggested that selenium can promote intracellular DNA and RNA synthesis and may be essential to cell growth.