In this study, the differences in annual rainstorm changes in the Second Songhua River Basin and the Nenjiang River basin and their causes were compared from the perspective of mountain effects. The following results ...In this study, the differences in annual rainstorm changes in the Second Songhua River Basin and the Nenjiang River basin and their causes were compared from the perspective of mountain effects. The following results were drawn: (1) Altitude effect is the primary factor leading to increased rainstorms in the southern source; (2) Slope effect primarily leads to differences of the weather systems in the two sources, and thus cause the difference of the rainstorms; (3) Slope effect is responsible for the greater fluctuation in the observed floods in the southern source. These landform differences eventually lead to the differences in the characteristics of floods in the southern and northern sources. Commensurability method was used to identify the period of rainstorms in the southern and northern sources. The results showed that although rainstorms do not appear at the same time in the two sources they are characteristic of a 10 years' period in both areas. These results can serve as hydrological references for flood control and long-term flood disaster predictions.展开更多
目的探讨miRNA-423-5p与干扰素调节因子1(IRF1)在肺腺癌中的作用及机制。方法体外培养肺腺癌细胞A549、H1299和H1975。实验分组:(1)在过表达miRNA-423-5p实验中,mimics NC作为对照组,miRNA-423-5p作为过表达组;(2)在敲降miRNA-423-5p实...目的探讨miRNA-423-5p与干扰素调节因子1(IRF1)在肺腺癌中的作用及机制。方法体外培养肺腺癌细胞A549、H1299和H1975。实验分组:(1)在过表达miRNA-423-5p实验中,mimics NC作为对照组,miRNA-423-5p作为过表达组;(2)在敲降miRNA-423-5p实验中,ASO-NC作为对照组,ASO-miRNA-423-5p作为敲降组;(3)过表达IRF1实验中,pcDNA3.1作为对照组,pcDNA3.1-IRF1作为过表达组;(4)同时过表达miRNA-423-5p和IRF1实验中,mimics NC+pcDNA3.1作为对照组,miRNA-423-5p+pcDNA3.1作为只过表达miRNA-423-5p组,miRNA-423-5p+pcDNA3.1-IRF1作为同时过表达miRNA-423-5p和IRF1组。采用CCK-8、克隆形成、5-乙炔基-2′-脱氧尿嘧啶核苷(EDU)、蛋白质印迹法、Transwell和划痕实验分别检测各组细胞增殖凋亡、侵袭和迁移能力的影响。通过Star Base数据库预测miRNA-423-5p与IRF1的结合位点,双荧光素酶实验验证miRNA-423-5p与IRF1之间的结合作用。裸鼠皮下成瘤实验检测稳定敲降miRNA-423-5p和稳定过表达IRF1细胞对移植瘤生长的影响。多组比较采用单因素方差分析,两组间比较采用独立样本t检验。结果CCK-8、克隆形成、EDU、蛋白质印迹法、划痕和Transwell实验结果示,过表达miRNA-423-5p会促进H1299细胞的增殖、迁移和侵袭能力,抑制H1299细胞的凋亡能力,均P<0.001。敲低miRNA-423-5p会抑制H1299细胞的增殖、迁移和侵袭能力,促进H1299细胞的凋亡能力,均P<0.001。过表达IRF1会抑制H1299细胞的增殖、迁移和侵袭能力,促进H1299细胞的凋亡能力,均P<0.001。过表达IRF1可以挽救过表达miRNA-423-5p对H1299细胞增殖、凋亡、迁移和侵袭能力的作用,均P<0.001。Star Base数据库预测显示,miRNA-423-5p与IRF1之间存在结合位点。双荧光素酶实验证明miRNA-423-5p与IRF1可以结合,t=26.470,P<0.001。qRT-PCR(t=7.085,P=0.001)和蛋白质印迹法(t=28.660,P<0.001)实验表明,miRNA-423-5p可以调节IRF1的表达。裸鼠皮下成瘤实验结果提示,稳定敲降miRNA-423-5p的H1299细胞瘤体体积[(491.40±94.34)mm^(3)vs(382.20±16.04)mm^(3),t=2.825,P=0.037]、瘤组织Ki-67(0.40±0.10 vs 0.24±0.02,t=3.843,P=0.012)和PCNA表达(0.45±0.09 vs 0.25±0.04,t=4.974,P=0.004)均显著降低,稳定过表达IRF1的H1299细胞瘤体体积[(291.50±109.1)mm^(3)vs(125.46±98.52)mm^(3),t=2.766,P=0.040]、瘤组织Ki-67(0.44±0.04 vs 0.25±0.02,t=10.407,P<0.001)和PCNA表达(0.39±0.03 vs 0.15±0.02,t=16.305,P<0.001)均显著降低。结论miRNA-423-5p可能通过调控IRF1促进肺腺癌的恶性表型。展开更多
基金supported by the Application Foundation Item of Science and Technology Department of Jilin Province (Grant No. 2011-05013)the National Natural Science Foundation of China (Grant No. 50879028)
文摘In this study, the differences in annual rainstorm changes in the Second Songhua River Basin and the Nenjiang River basin and their causes were compared from the perspective of mountain effects. The following results were drawn: (1) Altitude effect is the primary factor leading to increased rainstorms in the southern source; (2) Slope effect primarily leads to differences of the weather systems in the two sources, and thus cause the difference of the rainstorms; (3) Slope effect is responsible for the greater fluctuation in the observed floods in the southern source. These landform differences eventually lead to the differences in the characteristics of floods in the southern and northern sources. Commensurability method was used to identify the period of rainstorms in the southern and northern sources. The results showed that although rainstorms do not appear at the same time in the two sources they are characteristic of a 10 years' period in both areas. These results can serve as hydrological references for flood control and long-term flood disaster predictions.
文摘目的探讨miRNA-423-5p与干扰素调节因子1(IRF1)在肺腺癌中的作用及机制。方法体外培养肺腺癌细胞A549、H1299和H1975。实验分组:(1)在过表达miRNA-423-5p实验中,mimics NC作为对照组,miRNA-423-5p作为过表达组;(2)在敲降miRNA-423-5p实验中,ASO-NC作为对照组,ASO-miRNA-423-5p作为敲降组;(3)过表达IRF1实验中,pcDNA3.1作为对照组,pcDNA3.1-IRF1作为过表达组;(4)同时过表达miRNA-423-5p和IRF1实验中,mimics NC+pcDNA3.1作为对照组,miRNA-423-5p+pcDNA3.1作为只过表达miRNA-423-5p组,miRNA-423-5p+pcDNA3.1-IRF1作为同时过表达miRNA-423-5p和IRF1组。采用CCK-8、克隆形成、5-乙炔基-2′-脱氧尿嘧啶核苷(EDU)、蛋白质印迹法、Transwell和划痕实验分别检测各组细胞增殖凋亡、侵袭和迁移能力的影响。通过Star Base数据库预测miRNA-423-5p与IRF1的结合位点,双荧光素酶实验验证miRNA-423-5p与IRF1之间的结合作用。裸鼠皮下成瘤实验检测稳定敲降miRNA-423-5p和稳定过表达IRF1细胞对移植瘤生长的影响。多组比较采用单因素方差分析,两组间比较采用独立样本t检验。结果CCK-8、克隆形成、EDU、蛋白质印迹法、划痕和Transwell实验结果示,过表达miRNA-423-5p会促进H1299细胞的增殖、迁移和侵袭能力,抑制H1299细胞的凋亡能力,均P<0.001。敲低miRNA-423-5p会抑制H1299细胞的增殖、迁移和侵袭能力,促进H1299细胞的凋亡能力,均P<0.001。过表达IRF1会抑制H1299细胞的增殖、迁移和侵袭能力,促进H1299细胞的凋亡能力,均P<0.001。过表达IRF1可以挽救过表达miRNA-423-5p对H1299细胞增殖、凋亡、迁移和侵袭能力的作用,均P<0.001。Star Base数据库预测显示,miRNA-423-5p与IRF1之间存在结合位点。双荧光素酶实验证明miRNA-423-5p与IRF1可以结合,t=26.470,P<0.001。qRT-PCR(t=7.085,P=0.001)和蛋白质印迹法(t=28.660,P<0.001)实验表明,miRNA-423-5p可以调节IRF1的表达。裸鼠皮下成瘤实验结果提示,稳定敲降miRNA-423-5p的H1299细胞瘤体体积[(491.40±94.34)mm^(3)vs(382.20±16.04)mm^(3),t=2.825,P=0.037]、瘤组织Ki-67(0.40±0.10 vs 0.24±0.02,t=3.843,P=0.012)和PCNA表达(0.45±0.09 vs 0.25±0.04,t=4.974,P=0.004)均显著降低,稳定过表达IRF1的H1299细胞瘤体体积[(291.50±109.1)mm^(3)vs(125.46±98.52)mm^(3),t=2.766,P=0.040]、瘤组织Ki-67(0.44±0.04 vs 0.25±0.02,t=10.407,P<0.001)和PCNA表达(0.39±0.03 vs 0.15±0.02,t=16.305,P<0.001)均显著降低。结论miRNA-423-5p可能通过调控IRF1促进肺腺癌的恶性表型。
