正丁酸钠对涎腺腺样囊性癌细胞株ACC-2侵袭、迁移的影响及机制研究

目的：探讨不同浓度正丁酸钠对涎腺腺样囊性癌细胞株ACC‐2侵袭、迁移的影响与其作用机制。方法噻唑蓝（M T T ）法探索正丁酸钠作用ACC‐2细胞的最佳浓度，Transwell小室实验检测正丁酸钠对 ACC‐2细胞侵袭、迁移能力的影响， Western blot和实时荧光定量 PCR（RT‐PCR）分别检测5组浓度药物作用后ACC‐2细胞中高迁移率族蛋白1（HMGB1）、TLR4的mRNA和蛋白的表达。结果与对照组相比，0．625、1．250、2．500、5．000、10．000 mmol／L 5组浓度的正丁酸钠均能抑制ACC‐2细胞增殖（P＜0．05）且呈明显浓度依赖性；5组浓度正丁酸钠对细胞侵袭能力的影响差异无统计学意义（P＞0．05）；2．500、5．000、10．000 mmol／L浓度正丁酸钠可以抑制ACC‐2细胞的迁移能力（P＜0．05），同时降低ACC‐2细胞 HMGB1、TLR4的mRNA及蛋白表达（P＜0．05）；相关性分析显示TLR4蛋白表达的降低与 HMGB1的抑制呈正相关（r＝0．810，P＜0．05）。结论正丁酸钠能够抑制ACC‐2细胞增殖，浓度较高时可以抑制ACC‐2细胞的迁移能力，同时降低HMGB1、TLR4的mRNA与蛋白表达，提示NaB对ACC‐2迁移能力抑制可能通过下调 HMGB1、TLR4的mRNA及蛋白表达来实现。

The effect and mechanism of sodium butyrate on the invasion and migration in human salivary gland adenoid cystic carcinoma cell line ACC-2

Objective To observe the effect of sodium butyrate on the invasion and migration of human salivary gland ade‐noid cystic carcinoma cell line ACC‐2 in vitro and to investigate the underlying mechanisms .Methods The cultured ACC‐2 cells were treated with different concentrations of sodium butyrate for 24 h ,and detected the viability rate of the cells by methyl thiazolyl tetrazolium(MTT) assay ;the drug′s influence on invasion and migration on ACC‐2 were detected by Transwell experiment ,while the protein and mRNA expression of HMGB1 and TLR4 explored by Western‐blot and RT‐PCR assay ;the relationship between TLR4 expression and HMGB1 was investigated .Results Compared with control group ,0 .625 ,1 .250 ,2 .500 ,5 .000 ,10 .000 mmol/L groups of sodium butyrate inhibited the proliferation of ACC‐2 cells(P<0 .05);the influence of sodium butyrate on the in‐vasion of ACC‐2 cells of all groups had no significant difference(P>0 .05);only 2 .500 ,5 .000 and 10 .000 mmol/L groups inhibited ACC‐2 cells migration and down‐regulated the protein and mRNA of HMGB1 and TLR4(P<0 .05) .Correlation analysis showed a positive correlation between the TLR4 protein and HMGB1 protein(r=0 .810 ,P<0 .05) .Conclusion Sodium butyrate could inhib‐it ACC‐2 cells proliferation and high concentration gropes inhibit ACC‐2 cells migration ,while reducing HMGB1 and TLR4 mRNA and protein expression ,suggesting that NaB might inhibite ACC‐2 cells migration through down‐regulated the mRNA and protein expression .