The Jiuyishan complex massif,located in the northern section of the Nanling region,is a combination of five plutons,namely,the Xuehuading,Jinjiling,Pangxiemu,Shaziling and Xishan plutons.Whole-rock geochemistry,Iminer...The Jiuyishan complex massif,located in the northern section of the Nanling region,is a combination of five plutons,namely,the Xuehuading,Jinjiling,Pangxiemu,Shaziling and Xishan plutons.Whole-rock geochemistry,Imineral electron microprobe analysis,zircon U-Pb dating and Hf isotope analysis were carried out for the Jinjiling and Pangxiemu plutons.The zircon U-Pb dating yields weighted mean ages of 152.9±0.9 Ma for the Jinjiling pluton and 151.7±1.5 Ma for the Pangxiemu pluton,with a narrow gap between them.The Jinjiling and Pangxiemu plutons both have geochemical characteristics of high SiO2,Al2 O3,Na2 O,K2 O and low TiO2,MgO,CaO,P2 O5 contents,with intense depletions in Sr,Ba,Ti,Eu and enrichments in Ga,FeoOT and HFSE,and these characteristics reflect an A-type affinity.From the Jinjiling to the Pangxiemu plutons,the mineral composition of mica changes from lepidomelane to zinnwaldite,with increases in F,Li2 O and Rb2 O contents.The mineral composition of zircon changes from low Zr/Hf to high Zr/Hf,with increasing HfO2,P2 O5 and UO2+ThO2+Y2 O3 contents.The mineral compositions of feldspar indicate that the Pangxiemu pluton contains more alkali feldspar than the Jinjiling pluton.The whole-rock geochemistry and mineral compositions reveal a higher degree of differentiation for the Pangxiemu pluton.The nearly uniformεHf(t)indicates the same source region for the two plutons:both were derived from partial melting of the lower crust,with small contributions of mantle materials.In addition,higher F,lower Nb/Ta and Zr/Hf ratios in the Pangxiemu Pluton suggest a closer relationship with the rare metal mineralization than for the Jinjiling pluton.展开更多
【目的】试验前期组学数据提示甲型流感病毒(Influenza A Virus,IAV)感染A549细胞后宿主的环状RNA(circular RNA,circRNA)hsa_circ_004389表达显著上调。为进一步明确hsa_circ_004389表达和IAV感染间的关联,研究其对IAV复制的影响。【...【目的】试验前期组学数据提示甲型流感病毒(Influenza A Virus,IAV)感染A549细胞后宿主的环状RNA(circular RNA,circRNA)hsa_circ_004389表达显著上调。为进一步明确hsa_circ_004389表达和IAV感染间的关联,研究其对IAV复制的影响。【方法】(1)采用荧光定量PCR等方法,确定在IAV病毒感染后不同时间点和不同感染复数(Multiplicity of Infection,MOI)条件下hsa_circ_004389的表达水平;(2)检测聚肌苷酸胞苷酸(Polyinosinic acid:polycytidilic acid,poly I∶C)和细菌脂多糖(Lipopolysaccharide,LPS)处理后hsa_circ_004389的表达情况;(3)干扰素(Interferon,IFN)β和JAK的抑制剂处理细胞后检测hsa_circ_004389的表达情况;hsa_circ_004389过表达和敲低后,在mRNA和蛋白水平上检测该环状RNA对IAV复制的影响。【结果】宿主细胞内hsa_circ_004389表达的增加与IAV感染相关,且与病毒复制呈明显正相关,而JAK-STAT信号通路参与hsa_circ_004389的表达调控,并且hsa_circ_004389能够抑制IAV复制。【结论】hsa_circ_004389是宿主应答IAV感染的产物,为潜在的细胞Ⅰ型IFN应答IAV的拮抗因子。展开更多
基金financially supported by the Key R&D Program of China(Grant No.2017YFC0602402)the Innovationdriven Plan of Central South University,China(Grant No.2015CX008)+2 种基金the China Postdoctoral Science Foundation(Grant No.2017M622597)Open Research Fund Program of Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring(Central South University),Ministry of Education(Grant No.2019YSJS23)the Natural Science Foundation of Hunan Province(Grant No.2017JJ3138)
文摘The Jiuyishan complex massif,located in the northern section of the Nanling region,is a combination of five plutons,namely,the Xuehuading,Jinjiling,Pangxiemu,Shaziling and Xishan plutons.Whole-rock geochemistry,Imineral electron microprobe analysis,zircon U-Pb dating and Hf isotope analysis were carried out for the Jinjiling and Pangxiemu plutons.The zircon U-Pb dating yields weighted mean ages of 152.9±0.9 Ma for the Jinjiling pluton and 151.7±1.5 Ma for the Pangxiemu pluton,with a narrow gap between them.The Jinjiling and Pangxiemu plutons both have geochemical characteristics of high SiO2,Al2 O3,Na2 O,K2 O and low TiO2,MgO,CaO,P2 O5 contents,with intense depletions in Sr,Ba,Ti,Eu and enrichments in Ga,FeoOT and HFSE,and these characteristics reflect an A-type affinity.From the Jinjiling to the Pangxiemu plutons,the mineral composition of mica changes from lepidomelane to zinnwaldite,with increases in F,Li2 O and Rb2 O contents.The mineral composition of zircon changes from low Zr/Hf to high Zr/Hf,with increasing HfO2,P2 O5 and UO2+ThO2+Y2 O3 contents.The mineral compositions of feldspar indicate that the Pangxiemu pluton contains more alkali feldspar than the Jinjiling pluton.The whole-rock geochemistry and mineral compositions reveal a higher degree of differentiation for the Pangxiemu pluton.The nearly uniformεHf(t)indicates the same source region for the two plutons:both were derived from partial melting of the lower crust,with small contributions of mantle materials.In addition,higher F,lower Nb/Ta and Zr/Hf ratios in the Pangxiemu Pluton suggest a closer relationship with the rare metal mineralization than for the Jinjiling pluton.
文摘【目的】试验前期组学数据提示甲型流感病毒(Influenza A Virus,IAV)感染A549细胞后宿主的环状RNA(circular RNA,circRNA)hsa_circ_004389表达显著上调。为进一步明确hsa_circ_004389表达和IAV感染间的关联,研究其对IAV复制的影响。【方法】(1)采用荧光定量PCR等方法,确定在IAV病毒感染后不同时间点和不同感染复数(Multiplicity of Infection,MOI)条件下hsa_circ_004389的表达水平;(2)检测聚肌苷酸胞苷酸(Polyinosinic acid:polycytidilic acid,poly I∶C)和细菌脂多糖(Lipopolysaccharide,LPS)处理后hsa_circ_004389的表达情况;(3)干扰素(Interferon,IFN)β和JAK的抑制剂处理细胞后检测hsa_circ_004389的表达情况;hsa_circ_004389过表达和敲低后,在mRNA和蛋白水平上检测该环状RNA对IAV复制的影响。【结果】宿主细胞内hsa_circ_004389表达的增加与IAV感染相关,且与病毒复制呈明显正相关,而JAK-STAT信号通路参与hsa_circ_004389的表达调控,并且hsa_circ_004389能够抑制IAV复制。【结论】hsa_circ_004389是宿主应答IAV感染的产物,为潜在的细胞Ⅰ型IFN应答IAV的拮抗因子。
