注射人膀胱癌细胞、乳腺癌细胞、肺癌细胞或者黑色素瘤癌细胞的小鼠，给予PL可以抑制这些肿瘤的生长，但PL对正常小鼠未见毒性作用。
In mice injected with human bladder, breast, lung, or melanoma cancer cells, PL inhibited tumor growth but showed no toxicity in normal mice.
方法：膀胱癌荷瘤鼠注射N-CWS，观察N-CWS的抑瘤效果及N-CWS对白细胞介素2（IL-2）水平和自然杀伤（NK）细胞活性的影响。
Methods:The effects of N-CWS on bladder carcinoma and on the activities of interleukin-2(IL-2) and NK cell were studied in syngenic mice bearingbladder carcinoma.
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