摘要
目的采用RNA干扰技术(RNAi)技术观察低氧诱导因子-1a(HIF-1a)对人膀胱癌细胞株BIU一87增殖、侵袭及转移的影响。方法体外培养BIU-87细胞,实时荧光定量聚合酶链反应(FQ—PCIt)和Westernblot检测低氧(90%氮气+5%氢气+5%二氧化碳)和常氧下及HIF—lcx—siRNA转染前后BIU-87中HIF-1a、增殖细胞核抗原(PCNA)、基质金属蛋白酶(MMP)-2、MMP-9的表达;采用磺酰罗丹明B(SRB)法检测HIF-a-siRNA转染后的细胞增殖水平,细胞划痕和Transwell试验检测迁移和侵袭能力。结果低氧8、24h条件下,HIF—ln蛋白(0.56±0.08、1.33±0.21)、MMP-2mRNA(1.85±0.21、2.94±0.29)、MMP-2蛋白(0.68±0.11、1.37±0.22)、MMP一9mRNA(2.08±0.32、3.49±0.44)、MMP一9蛋白(0.89±0.12、1.40±0.23)表达与正常氧条件比较HIF一1d蛋白(0.33±0.05)、MMP一2mRNA(O.95±0.13)、MMP-2蛋白(0.47±0.07)、MMP-9mRNA(1.21±0.17)、MMP一9蛋白(0.58±0.14)表达均显著升高(均P〈0.05),HIF-1a mRNA(1.05±0.09、0.96±0.11)与正常氧条件(1.16±0.13)比较无明显变化;HIF-1a-siRNA转染后与转染前比较能有效沉默HIF—1a与转染前(1.12±0.17、315.25±40.94、96.86±9.85)比较,HIF。1饯.siRNA能降低增殖、侵袭及迁移细胞数(0.63±0.08、139.62±19.67、69.17±7.39)(均P〈0.05);BIU一87中PCNAmRNA(0.57±0.07)、PCNA蛋白(0.52±0.09)、MMP-2mRNA(0.64±0.08)、MMP-2蛋白(0.53±0.07)、MMP-9mRNA(0.49±0.06)、MMP-9蛋白(0.69±0.07)表达与转染前比较显著降低(0.99±0.14、0.80±0.13、1.06±0.13、0.87±0.12、0.99±0.12、1.12±0.14)(P〈0.05)。结论低氧下,HIF一10l—siRNA通过沉默HIF-1a,降低PCNA、MMP-2、MMP-9表达而抑制膀胱癌细胞增殖、侵袭及转移。
Objective To investigate the effects of silencing hypoixa inducible factor-lc~ (HIF-1a geue by RNAi on proliferation, invasion and metastasis of human bladder cancer cell line BIU-87. Methods BIU-87 cells were cultured in vitro. The expression of HIF-1a, proliferating cell nuclear antigen (PCNA), matrix metalloproteinase (MMP)-2, and MMP-9 was detected by using fluorescence real-time quantitative polymerase chain reaction (PCR) and Western blotting under normoxia or hypoxia (90%0 N2 ±5% H2 ±5% CO2 ). The cell proliferation was tested by SRB assay after transfection of HIF-lc^-siRNA. Invasion and me- tastasis were tested by cell scratch assay and Transwell chambers respectively. The expression of PCNA, MMP-2, and MMP-9 was detected. Results The expression levels of HIF-1a protein (0. 56 ± 0. 08, 1.33 ± 0. 21 ), MMP-2 mRNA ( 1.85 ±0. 21, 2. 94 ±0. 29), MMP-2 protein (0. 68 ±0. 11, 1.37 ±0. 22), MMP-9 mRNA (2. 08 ±0. 32, 3.49 ±0. 44) , and MMP-9 protein (0. 89 ±0. 12, 1.40 ±0. 23 ) were increased un- der hypoxia for 8, and 24 h than those under normoxia [ HIF-1a protein (0.33 ± 0.05 ) , MMP-2 mRNA (0. 95 ±0. 13), MMP-2 protein (0. 47 ±0. 07), MMP-9 mRNA ( 1.21 ±0. 17), MMP-9 protein (0. 58 ± 0. 14) ± (P 〈 0. 05 ). There was no significant difference in HIF-1 a mRNA ( 1.05 ± 0. 09, 0. 96 ± O. 11 ) between hypoxia for 8, 24 h and normoxia [ ( 1.16 ± 0. 13) ] (P 〉 0. 05 ). HIF-lcL expression was sup- pressed after HIF-1a-siRNA transfection. The number of proliferation, invasion and metastasis cells (0. 63 ±0. 08, 139. 62 ± 19.67, 69. 17 ±7.39) was decreased after HIF-la-siRNA transfection as com- pared with that before transfection ( 1.12 _± 0. 17, 315.25 ± 40. 94, 96. 86 ± 9. 85 ) (P 〈 0. 05 ). The ex- pression of PCNA mRNA (0. 57 ± 0.07), PCNA protein (0. 52 ± 0. 09), MMP-2 mRNA (0. 64 ± 0. 08), MMP-2 protein (0.53 ±0.07), MMP-9 mRNA (0.49 ±0.06), and MMP-9 protein (0.69 ±
出处
《中华实验外科杂志》
CAS
CSCD
北大核心
2013年第2期322-325,共4页
Chinese Journal of Experimental Surgery
关键词
低氧诱导因子-1A
膀胱肿瘤
RNA干扰
增殖细胞核抗原
金属基质蛋白酶
Hypoixa inducible factor-la
Human bladder cancer
RNA interference
Prolif-erating cell nuclear antigen
Matrix metalloproteinases