碳酸锂对荷瘤小鼠的抑瘤防瘤及抗氧化作用研究

为探讨碳酸锂（Ｌｉ２ＣＯ３）对肿瘤是否有防治作用，选择两种荷瘤小鼠（肝癌Ｈ２２、肉瘤Ｓ１８０）对其进行了抑瘤防瘤实验研究，同时测定两种荷瘤小鼠血细胞超氧化物歧化酶（ＳＯＤ）活性、血浆丙二醛（ＭＤＡ）含量，初步探讨碳酸锂对荷瘤小鼠体内氧化及抗氧化系统的影响，并与环磷酰胺（ＣＰ）的毒副作用进行了比较。结果表明，Ｌｉ２ＣＯ３在剂量设计范围内未见明显的毒副作用。抑瘤防瘤实验中，对Ｈ２２和Ｓ１８０两种肿瘤均有明显的抑制作用；可提高两种荷瘤小鼠血细胞的ＳＯＤ活性，降低ＭＤＡ含量；同时对荷瘤小鼠血液白细胞（ＷＢＣ）水平无影响，并可降低荷瘤小鼠的骨髓细胞微核率（ＭＮＦ）。而ＣＰ则有肯定的降ＷＢＣ作用和致突变作用。

Study on inhibition and prevention of tumor and antioxidative effects of lithium carbonate in tumor bearing mice]

Two Kinds of tumor-bearing mice (hepatoma H22 and sarcoma S180) were administered with lithium carbonate (Li2CO3) for 17 or 10 days (advanced and simultaneous administration), in order to observe the effects of prevention and treatment of Li2CO3 on malignant tumor, as well as the relationship between Li2CO3 and lipid peroxidation in tumor-bearing mice. Meanwhile, we compared the toxic and side effects of cyclophosphamide (CP) with that of Li2CO3. The results showed that Li2CO3 had no significant toxic or side effects with the suggested doses. In the tests of inhibition and prevention of tumor, Li2CO3 could significantly inhibit the grouth of the two kinds of tumor, and increase the activity of superoxide dismutage (SOD) and decrease the contents of Malonyldialdehyde (MDA). In addition, Li2CO3 had no effect on the white blood cells (WBC) and decreased the micronucleus frequency (MNF) in bone marrow polychromatic erythrocytes (PCE), while CP had definite effect of decreasing the WBC and increasing the MNF in the tumor-bearing mice.