APRIL siRNA对 SW480裸鼠移植瘤的影响

Effect of APRIL siRNA in Nude Mice with SW480

目的：探讨增殖诱导配体（APRIL）基因在 SW480裸鼠移植瘤中的作用。方法建立人结直肠癌（CRC）裸鼠移植瘤模型并随机分为3组，瘤块内分别注射 APRIL siRNA、空载体和 PBS液。RT-PCR和免疫组织化学法（IHC）检测 A-PRIL水平和蛋白表达，人基质金属蛋白酶抑制因子-3（IHC检测TIMP-3），多配体蛋白聚糖-1（Syndecan-1，又名CD138）和基质金属蛋白酶-9（MMP-9）蛋白表达。结果①注射PBS组裸鼠移植瘤瘤块质量（2.15±0.30 g）明显高于注射 APRIL siRNA组（0.95±0.15 g，P＜0.05），与注射空载体组（2.20±0.25 g）比较差异无统计学意义（P＞0.05）。②注射 PBS组裸鼠 APRIL mRNA／18S rRNA比值（2.48±0.25）明显高于注射 APRIL siRNA组（0.39±0.15，P＜0.05），与注射空载体组（2.51±0.30）比较差异无统计学意义（P＞0.05）。③注射 APRIL siRNA 明显抑制 SW480细胞侵袭转移，3组 TIMP-3 Allred得分为7.70±0.35，1.10±0.16和1.15±0.12；Syndecan-1蛋白分别为7.80±0.30，1.05±0.20和1.10±0.22；MMP-9蛋白分别为1.20±0.10，8.00±0.25和8.20±0.20。结论 APRIL与人结直肠癌细胞 SW480的生长和转移有密切关系。

Objective To investigate the role of APRIL in SW480 cell line.Methods The CRC model was established in the nude mice,all the mice were divided into 3 groups,the mice were separately treated with APRIL siRNA,pGC-vector and PBS solution.The APRIL mRNA was detected by RT-PCR and the APRIL protein was surveyed by the way of immunohis-tochemistry （IHC）.The proteins of TIMP-3,Syndecan-1and MMP-9 also were assessed by IHC.Results ①Tumor mass in the group of nude mice injected with PBS （2.15±0.30 g）was significantly higher than the injection APRIL siRNA group （0.95±0.15 g,P〈0.05）,and was not statistically significant （P〉0.05）compared with the injection of empty vector group （2.20±0.25 g）.②APRIL mRNA/18S rRNA ratio （2.48±0.25）in the group of mice injected with PBS was signifi-cantly higher than the injection APRIL siRNA group （0.39±0.15,P〈0.05）,and was not statistically significant （P〉0.05）compared with the injection of empty vector group （2.51±0.30）.③SW480 cells injected with APRIL siRNA signifi-cantly inhibited invasion and metastasis.TIMP-3 Allred scores in three groups were 7.70±0.35,1.10±0.16 and 1.15± 0.12,Syndecan-1 protein was 7.80±0.30,1.05±0.20 and 1.10±0.22 MMP-9 protein was 1.20 ±0.10,8.00±0.25 and 8.20±0.20,respectively.Conlusion APRIL was closely connected with the growth and metabasis of CRC.