Objective To explore the influence of sodium selenite(Na2SeO3) and sodium phosphate(Na3PO4)given alone or combined on inhibition of liver cell proliferation of mouse exposed to sodium arsenite(NaAsO2) in vitro.Methods Primary mouse liver cell were treated with 8.0 μmol/L NaAsO2.Based on the two-factor and three-level (3 × 3) factorial design,the cells were randomly assigned into nine groups and cultured with different dosage of Na2SeO3(0.0,5.0,10.0 μmol/L) and Na3PO4(0.0,7.5,15.0 μmol/L),respectively.Liver cell activity was examined with thiazole blue reduction method (MTT) and the protective effect of Na2SeO3 and Na3PO4 on cell proliferation inhibition was tested.Results Different dose of Na2SeO3 had different protective effect on proliferation inhibition of mouse liver cell exposed to NaAsO2(F =35.743,P ＜ 0.05),so did Na3PO4(F =35.182,P ＜ 0.05).Meanwhile there was an interaction between Na2SeO3 and Na3PO4(F =13.702,P ＜ 0.05).The most significant intervention effect was observed in the group given low dose of Na2SeO3 (5.0 μmol/L) plus high dose of Na3PO4(15.0 μmol/L).Through pairwise comparison we found that there was no significant difference between the high and the low dose of Na3PO4 exposure groups of the protective effect on inhibiting of cell proliferation when the dosage of Na2SeO3 was fixed at certain levels(0.575 ± 0.070 vs 0.570 ± 0.017,0.789 ± 0.047 vs 0.797± 0.026,0.648 ± 0.027 vs 0.674 ±0.034,all P ＞ 0.05).However,when the dose of Na3PO4 was fixed,there was a significant difference between the high and the low dose of Na2SeO3 exposure groups(0.629 ± 0.026 vs 0.755 ± 0.063,0.789 ± 0.047 vs 0.648 ± 0.027,0.797 ± 0.026 vs 0.674 ± 0.034,all P ＜ 0.05).Conclusion A certain dose of Na2SeO3 and Na3PO4 has independent and combined antagonistic action to inhibition of mouse liver cell proliferation induced by NaAsO2 in vitro.%目的 探讨硒(亚硒酸钠)和磷(磷酸钠)单独及联合应用对染砷(亚砷酸钠)小鼠肝细胞体外增殖作用的影响.方法 采用原代小鼠肝细胞培养技术,用8.0μmol/L亚砷酸钠处理细胞,应用两因素三水平(3×3)析因设计将细胞分为9组,分别加入含不同剂量亚硒酸钠(0.0、5.0、10.0 μmol/L)和磷酸钠(0.0、7.5、15.0μmol/L)的培养液进行培养,通过噻唑蓝还原法(MTT)观察肝细胞活性,检测亚硒酸钠、磷酸钠对细胞增殖的影响.结果 不同剂量亚硒酸钠对亚砷酸钠染毒小鼠肝细胞的增殖作用不同(F=35.743,P＜0.05),不同剂量磷酸钠对亚砷酸钠染毒小鼠肝细胞的增殖作用不同(F=35.182,P＜0.05),亚硒酸钠和磷酸钠存在交互作用(F=13.702,P＜0.05),在低硒高磷组(亚硒酸钠5.0 μmol/L和磷酸钠15.0μmol/L)干预效果最明显.两两比较发现,在固定亚硒酸钠时,低磷组和高磷组对细胞抑制的保护效应无统计学意义(0.575±0.070 vs0.570±0.017、0.789±0.047 vs 0.797±0.026、0.648±0.027 vs 0.674±0.034,P均＞0.05)；在固定磷酸钠时,低硒组和高硒组对细胞抑制的保护效应有统计学意义(0.629±0.026 vs 0.755±0.063、0.789±0.047 vs0.648±0.027、0.797±0.026 vs 0.674±0.034,P均＜0.05).结论 一定剂量的亚硒酸钠和磷酸钠对亚砷酸钠致小鼠肝细胞体外增殖的抑制作用具有单独及联合拮抗作用.
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