目的探讨钾双孔域通道亚家族K成员1(potassium two pore domain channel subfamily K member 1,KCNK1)在肺癌中的功能及其作用机制。方法利用TCGA数据分析KCNK1在肺癌组织中的表达水平,在H1299和H1975中用克隆形成实验检测KCNK1基因敲...目的探讨钾双孔域通道亚家族K成员1(potassium two pore domain channel subfamily K member 1,KCNK1)在肺癌中的功能及其作用机制。方法利用TCGA数据分析KCNK1在肺癌组织中的表达水平,在H1299和H1975中用克隆形成实验检测KCNK1基因敲减后对肺腺癌细胞增殖的影响,探讨KCNK1在肺腺癌细胞增殖中的作用,并用CCK8等细胞增殖、转移实验进一步验证其功能;将KCNK1干扰后,用Western blot和qPCR实验检测下游通路基因以分析KCNK1基因可能的作用机制。结果KCNK1基因在肺癌组织与癌旁组织相比表达显著升高(P<0.05),且KCNK1敲减后抑制细胞增殖和转移;干扰KCNK1可以抑制CREB3及靶基因的表达水平。结论KCNK1基因在肺癌的恶性进展中起重要的作用,该作用通过调控环磷酸腺苷反应元件结合蛋白3(CREB3)机制进行,KCNK1基因是肺癌新的潜在分子诊断指标及靶点。展开更多
The results from comparative study of the EUF-K values of four different soils and of their varions particlefractions (<2μm, 2-10μm and 10 50μm) showed that the EUF-K values were related to the composition ofcl...The results from comparative study of the EUF-K values of four different soils and of their varions particlefractions (<2μm, 2-10μm and 10 50μm) showed that the EUF-K values were related to the composition ofclay minerals and the soil particle size. The EUF-K values (0-35 min) were closely related to the amountof rapidly available K and part of non-exchangeable K of soils. Biological experiments proved that EUFtechnique was an effective method for evaluating soil K-supplying power.展开更多
A pot experiment was conducted in the growth chamber on Saskatchewan soils with dfferent texture todeterniine the K release status and wheat K demand. The relationship between K uptake and soil availableK extracted by...A pot experiment was conducted in the growth chamber on Saskatchewan soils with dfferent texture todeterniine the K release status and wheat K demand. The relationship between K uptake and soil availableK extracted by cation exchange membrane (CEM-K) and the effect of K fertilizer on wheat growth and soilavailable K was also evaluated. Theatments of 0, 60 and 120 mg K/kg were applied to sandy, low and highK loamy and clay soils. The highest yields were achieved with the application of 120 mg K/kg in sandysoil and 60 mg K/kg in other soils. On the whole, the clay soil contributed K more than other soils fromslowly available fraction. Regression revealed a linear relationship between the soil available K extractedby NH_4OAc(Ka) and CEM-K in suspensions (r=0.93). Results also showed that CEM-K in burial and insuspensions were different not only in the amount but also in correlation with Ka or K uptake.展开更多
Soil and tissue analyses are usually used in identifying potassium(K) deficiencies and predicting K fertilizer requirements of crops.The critical levels of both soil and fresh leaf tissue at seventh leaf stage were de...Soil and tissue analyses are usually used in identifying potassium(K) deficiencies and predicting K fertilizer requirements of crops.The critical levels of both soil and fresh leaf tissue at seventh leaf stage were developed and assessed for canola,chickpea and sunflower grown on two Saskatchewan,soils,with six rates of K fertilizer supply, in a growth chamber experiment.The available potassium in soils was determined by two methods:1)resin strip extraction, and 2) NH4OAC extraction. The potassium in fresh leaves was determined at seventh leaf stage by a simple procedure using a common garlic press and injector to extract the plant sap and testing the sap with a handheld ion selection electrode meter. The results shoWed significant relationships between the resin strip extractable K and NH4OAC extractable K, and between the plant uptake of total K and the supply of available K in the soils determined by the two methods. Good relationships were also found between the potassium in fresh leaves and the plant uptake of total K for canola, chickpea and sunflower.The resin strip extraction for K was calibrated using common NH4OAC extraction, and recommended for routine analyses because of its simplicity and sensitivity.展开更多
文摘目的探讨钾双孔域通道亚家族K成员1(potassium two pore domain channel subfamily K member 1,KCNK1)在肺癌中的功能及其作用机制。方法利用TCGA数据分析KCNK1在肺癌组织中的表达水平,在H1299和H1975中用克隆形成实验检测KCNK1基因敲减后对肺腺癌细胞增殖的影响,探讨KCNK1在肺腺癌细胞增殖中的作用,并用CCK8等细胞增殖、转移实验进一步验证其功能;将KCNK1干扰后,用Western blot和qPCR实验检测下游通路基因以分析KCNK1基因可能的作用机制。结果KCNK1基因在肺癌组织与癌旁组织相比表达显著升高(P<0.05),且KCNK1敲减后抑制细胞增殖和转移;干扰KCNK1可以抑制CREB3及靶基因的表达水平。结论KCNK1基因在肺癌的恶性进展中起重要的作用,该作用通过调控环磷酸腺苷反应元件结合蛋白3(CREB3)机制进行,KCNK1基因是肺癌新的潜在分子诊断指标及靶点。
文摘The results from comparative study of the EUF-K values of four different soils and of their varions particlefractions (<2μm, 2-10μm and 10 50μm) showed that the EUF-K values were related to the composition ofclay minerals and the soil particle size. The EUF-K values (0-35 min) were closely related to the amountof rapidly available K and part of non-exchangeable K of soils. Biological experiments proved that EUFtechnique was an effective method for evaluating soil K-supplying power.
文摘A pot experiment was conducted in the growth chamber on Saskatchewan soils with dfferent texture todeterniine the K release status and wheat K demand. The relationship between K uptake and soil availableK extracted by cation exchange membrane (CEM-K) and the effect of K fertilizer on wheat growth and soilavailable K was also evaluated. Theatments of 0, 60 and 120 mg K/kg were applied to sandy, low and highK loamy and clay soils. The highest yields were achieved with the application of 120 mg K/kg in sandysoil and 60 mg K/kg in other soils. On the whole, the clay soil contributed K more than other soils fromslowly available fraction. Regression revealed a linear relationship between the soil available K extractedby NH_4OAc(Ka) and CEM-K in suspensions (r=0.93). Results also showed that CEM-K in burial and insuspensions were different not only in the amount but also in correlation with Ka or K uptake.
文摘Soil and tissue analyses are usually used in identifying potassium(K) deficiencies and predicting K fertilizer requirements of crops.The critical levels of both soil and fresh leaf tissue at seventh leaf stage were developed and assessed for canola,chickpea and sunflower grown on two Saskatchewan,soils,with six rates of K fertilizer supply, in a growth chamber experiment.The available potassium in soils was determined by two methods:1)resin strip extraction, and 2) NH4OAC extraction. The potassium in fresh leaves was determined at seventh leaf stage by a simple procedure using a common garlic press and injector to extract the plant sap and testing the sap with a handheld ion selection electrode meter. The results shoWed significant relationships between the resin strip extractable K and NH4OAC extractable K, and between the plant uptake of total K and the supply of available K in the soils determined by the two methods. Good relationships were also found between the potassium in fresh leaves and the plant uptake of total K for canola, chickpea and sunflower.The resin strip extraction for K was calibrated using common NH4OAC extraction, and recommended for routine analyses because of its simplicity and sensitivity.
