脱氧寡核苷酸对卵巢癌细胞核转录因子-κB活性和下游细胞分子表达的影响

目的 探讨核转录因子(NF)-κB诱捕物脱氧寡核苷酸(ODN)对人卵巢癌细胞株SKOV3细胞NF-κB活性和下游细胞分子如细胞间黏附分子1(ICAM-1)、血管内皮生长因子(VEGF)、尿激酶型纤溶酶原激活剂(uPA)表达的影响。方法 SKOV3细胞转染NF-κB诱捕物ODN后,用白细胞介素113(IL-1β)刺激6、12、24、48 h,采用凝胶电泳滞后实验测定NF-κB DNA结合活性,采用RT-PCR技术检测ICAM-1、VEGF、uPA mRNA表达水平,采用酶联免疫吸附实验(ELISA)检测VEGF蛋白表达水平。结果 (1)SKOV3细胞表达NF—κB DNA结合活性,IL-1β刺激后其活性上升,在转染NF—κB诱捕物ODN后SKOV3细胞NF-κB DNA结合活性被显著抑制,刺激6、12、24、48 h的抑制率分别为99.6％、86.4％、80.1％、21.6％。各时间点间比较,差异均有显著性(P<0.05～0.01)。(2)SKOV3细胞表达ICAM-1、VEGF、uPA mRNA和VEGF蛋白,IL-1β刺激后其表达率上升,转染NF-κB诱捕物ODN后其表达率下降。结论NF—κB诱捕物ODN转染SKOV3细胞后可能通过抑制NF-κB活性,从而抑制ICAM-1、VEGF、uPA的表达。NF—κB诱捕物ODN有望应用于卵巢癌的基因治疗。

Influence of nuclear factor-kappaB decoy transfection on nuclear factor-kappaB activity and vascular endothelial growth factor/urokinase-type plasminogen activator/intercellular cell adhesion molecule-1 level of SKOV3 cells

OBJECTIVE: To investigate the effect of nuclear factor-kappaB (NF-kappaB) decoy oligodeoxynucleotides (ODN) on NF-kappaB activation and expressions of vascular endothelial growth factor (VEGF), urokinase-type plasminogen activator (uPA), intercellular cell adhesion molecule-1 (ICAM-1) of SKOV3 cell. METHODS: After transfected with NF-kappaB decoy ODN, SKOV3 cells were stimulated by IL-1beta and cultured for 6, 12, 24, and 48 h, respectively. NF-kappaB DNA binding activity was measured by gel mobility shift assay and mRNA levels of ICAM-1, uPA, VEGF were analyzed by RT-PCR and VEGF level in supernatant was detected by enzyme-linked immunosorbent assay (ELISA). RESULTS: (1) SKOV3 cells expressed constitutive NF-kappaB DNA binding activity and stimulation of IL-1beta resulted in a significant increase of the binding activity. NF-kappaB decoy ODN transfection significantly decreased constitutive level and elevated level of NF-kappaB DNA binding activity by IL-1beta at 6, 12, 24, and 48 h in vitro (P < 0.05). (2) The constitutive and activated mRNA levels of uPA, VEGF, ICAM-1 and VEGF levels in the supernatant were significantly inhibited by NF-kappaB decoy ODN transfection especially at 6 h after transfection in vitro. CONCLUSIONS: Both NF-kappaB DNA binding activity and expressions of uPA, VEGF, and ICAM-1 at 48 h were upregulated by IL-1beta, and inhibited by transfection with NF-kappaB decoy ODN in SKOV3 cell line. NF-kappaB decoy ODN transfection shows promise as a novel molecular approach for ovarian cancer.