PKC-α、PKA-Ⅰ反义核酸对鼻咽癌CNE-2Z细胞生长增殖的影响

Effects of PKC-α asODN and PKA-ⅠasODN on growth andproliferation of the CNE-2Z cells of nasopharyngeal carcinoma

目的 :探讨PKC -α和PKA -Ⅰ反义核酸 (asODN)对鼻咽癌CNE - 2Z细胞生长增殖的影响。方法 :分别用脂质体 (lipofectin ,LP)介导asODN转染鼻咽癌CNE - 2Z细胞。实验组 :① 0 0 1- 1 0 0 μmol/LPKC -αasODN ;②0 0 1- 1 0 0 μmol/LPKA -ⅠasODN ;③ 0 5 0 μmol/LPKC -αasODN +0 5 0 μmol/LPKA -ⅠasODN。对照组 :相应浓度的随机序列 (rODN)。用免疫组化法检测CNE - 2Z细胞PKC -α和PKA -Ⅰ的表达 ,MTT法检测其生长指数 (growthin dex ,GI) ,软琼脂克隆形成率检测其体外增殖能力。结果 :PKC -αasODN或 /和PKA -ⅠasODN均可阻断其相应PKC-α或PKA -Ⅰ的表达 (P <0 0 5 )。PKC -αasODN或PKA -ⅠasODN均能显著降低CNE - 2Z细胞GI和软琼脂克隆形成率 (P <0 0 5 ) ,且具有量效依赖关系。PKC -αasODN +PKA -ⅠasODN共同作用可使其GI和软琼脂克隆形成率非常显著降低 (P <0 0 1) ,无明显量效依赖关系 ,两者对CNE - 2Z生长抑制作用强于PKC -αasODN或PKA -Ⅰa sODN(P <0 0 5 ) ,对其软琼脂克隆形成率的抑制作用与PKC -αasODN或PKA -ⅠasODN无显著差异 (P >0 0 5 )。结论 :PKC -αasODN和PKA -ⅠasODN均可抑制CNE - 2Z细胞体外生长和增殖 ,两者具有协同作用。

AIM: To investigate the effects of antisense oligonucleotides (asODN) of PKC-α and PKA-Ⅰon growth and proliferation of the CNE-2Z cells. METHODS: The expression of PKC-α and PKA-Ⅰ was observed with immunohistochemistry method. The asODNs of (1)PKC-α, (2)PKA-Ⅰ, (3)PKC-α and PKA-Ⅰ, were transfected into CNE-2Z cells by lipofectin (LP), and a random sequence as a control was used. The cell growth index (GI) and the clone formation rate of CNE-2Z were detected by MTT colorimetric assay and soft agar assy, respectively. RESULTS: The expression of PKC-α or PKA-Ⅰin CNE-2Z in experimental group were both significantly lower than that of control group(P<0.05). The GI and clone formation rates of CNE-2Z cells transfected by PKC-α and PKA-ⅠasODN with concentrations ranging from 0.05 μM to 1.00 μM were lower significantly than that of control groups(P<0.05), and there was a dose-dependent relationship among them. The inhibitory effects of PKC-α and PKA-ⅠasODNs both on the cell growth index (GI) and clone formation rates were more significant than that of control group(P<0.01),and the GI were significantly lower than that of the other experimental groups(P<0.05). CONCLUSION: PKC-α asODN and PKA-ⅠasODN inhibited CNE-2Z growth and proliferation in vitro, and a synergetic inhibitory effect of PKC-α asODN and PKA-ⅠasODN was also observed.