KAI1基因抑制胰腺癌转移的体内实验

目的 研究瘤体注射携带KAI1基因的腺病毒(Ad-KAI1)抗胰腺癌转移的作用.方法 首先建立胰腺癌荷瘤裸鼠模型,分别将其分为生理盐水对照组、Ad组和Ad-KAI1组.从成瘤第10天开始,每7 d注射1次,共注射3次,观察肿瘤的重量和体积,肝、肺重及病理改变.结果 3组移植瘤的重量和体积无显著差异.Ad-KAI1组肺重(0.366±0.041)g,肝重(1.35±0.21)g;Ad组肺重(0.57±0.065)g,肝重(1.58±1.828)g;对照组肺重(0.66±0.13)g,肝重(1.95±0.34)g.Ad-KAI1组与对照组差异显著(t=5.984,P<0.05),Ad组与对照组差异无显著性(t=1.089,P>0.05).Ad-KAI1组肺转移灶平均(1±1)个,肝转移灶平均(2±1)个,淋巴结转移灶平均(2±2)个;Ad组分别为(6±2)个、(5±1)个和(10±2)个;对照组分别为(7±2)个、(6±2)个和(11±3)个.Ad-KAI1组转移灶显著少于对照组(t=7.44、4.34、8.16,P<0.05),而Ad组与对照组无显著差异(t=0.92、0.64、0.42,P>0.05).结论 Ad-KAI1肿瘤内直接注射具有抑制胰腺癌转移的作用.

Effect on metastasis of pancreatic cancer in mice injected with KAI1 gene in vivo

Objective To observe the inhibitory effect on metastasis and growth of pancreatic cancer in mice by injection of KAI1 gene in vivo. Methods Pancreatic cancer cell line MiaPaCa Ⅱ was used to construct the nude mice models bearing tumors, then the mice were divided into normal saline group, Ad group and Ad-KAI1 group. Since the 10th days of model construction, the Ad-KAI1 was injected every 7 d and repeated twice, then the tumor size, the weight of liver, lung and their pathologic changes were evaluated. Results The tumor sizes were not significantly different between the three groups. The weight of lung and liver of Ad-KAI1 group was (0.366±0.041) g and (1. 35±0.21) g, respectively; the weight of lung and liver of Ad group was (0.57±0.065) g and (1.58±1.828) g, respectively; the weight of lung and liver of control group was (0.66±0.13)g and (1.95±0.344)g, respectively. The difference between Ad-KAI1 group and control group was significantly different (t = 5.984, P < 0. 05), and there was no significant difference between Ad group and control group (t=1.089, P > 0.05). The number of pulmonary, liver and lymph node metastasis in Ad-KAI1 group was (1±1), (2±1) and (2±2), respectively; in Ad group was (6±2), (5 ±1), (10±2), respectively; in control group was (7±2), (6±2), (11±3), respectively. The difference between Ad-KAI1 group and control group was significantly different (t = 7.44, 4.34, 8. 16, P < 0.05), while the difference between Ad group and control group was not significantly different (t=0.92, 0.64, 0.42, P >0.05). Conclusions KAI1 gene directly injected into tumors of nude mice may inhibit the growth and metastasis of pancreatic cancer.