The liver is a vital organ in chickens that performs a number of crucial physiological functions, including the storage of hepatic glycogen, protein synthesis, detoxification, and deoxidation. The growth and metabolis...The liver is a vital organ in chickens that performs a number of crucial physiological functions, including the storage of hepatic glycogen, protein synthesis, detoxification, and deoxidation. The growth and metabolism of the liver are complex processes influenced by factors such as environment, diet, and genetics. MicroRNAs(miRNAs), as posttranscriptional regulatory molecules, play a role in various biological processes. There is growing evidence that miR-27b-5p plays a key role in the regulation of liver development and metabolism in various species. However, its role in chicken livers has yet to be determined. In our experiment, we found that chickens with fatty livers had significantly higher levels of serum triglyceride(TG) and total cholesterol(TC) compared to the normal chickens, while the control group had significantly higher levels of very low-density lipoprotein(VLDL) and serum hormones. Further research showed that the mRNA of miR-27b-5p was highly expressed in fatty livers. By exploring the function of miR-27b-5p in chicken livers, we discovered that it promotes lipogenesis, oxidative stress, and inflammatory responses, leading to hepatocyte apoptosis. Our study also established the mechanism by which miR-27b-5p interacts with its target gene, and found that miR-27b-5p targets insulin receptor substrate 2(IRS2) and modulates the PI3K/AKT signaling pathway. Additionally, our investigation of IRS2 in chicken hepatocytes revealed that knocking down IRS2 has the same effects as overexpressing miR-27b-5p. In conclusion, our study revealed that miR-27b-5p directly binds to IRS2, inhibiting the PI3K/AKT signaling pathway and causing steatosis, oxidative stress, inflammation, and apoptosis in chicken liver.展开更多
目的:探讨针刺对2型糖尿病(T2DM)大鼠肝组织胰岛素受体底物1和2基因(IRS1和2mRNA)表达的影响。方法:给食源性肥胖大鼠腹腔注射小剂量链脲佐菌素(STZ)(25mg/kg)造模成T2DM大鼠,随机分为针刺组、优降糖组和模型组,处理4周后,用快速血糖仪...目的:探讨针刺对2型糖尿病(T2DM)大鼠肝组织胰岛素受体底物1和2基因(IRS1和2mRNA)表达的影响。方法:给食源性肥胖大鼠腹腔注射小剂量链脲佐菌素(STZ)(25mg/kg)造模成T2DM大鼠,随机分为针刺组、优降糖组和模型组,处理4周后,用快速血糖仪检测空腹血糖(FBS)、用放免法检测空腹胰岛素(FINS)、用实时定量荧光PCR(real-tim e RT PCR)法检测肝组织IRS1和2mRNA表达,并与正常组大鼠进行对照。结果:针刺组和优降糖组FBS和FINS比模型组显著降低(P<0.05);模型组IRS1mRNA相对含量是正常组的25%,针刺组为正常组的2.83倍,优降糖组为正常组的1.23倍。模型组IRS2mRNA相对含量为正常组的2.19倍,针刺组IRS2mRNA相对含量为正常组的4.84%,优降糖组IRS2mRNA相对含量为正常组的4.59倍。结论:肝组织IRS1和2mRNA表达异常可能是T2DM的发病机制之一,针刺和优降糖均可上调T2DM大鼠肝组织IRS1mRNA的表达,针刺对T2DM大鼠肝组织IRS1 mRNA表达的上调作用优于优降糖;针刺具有显著抑制T2DM大鼠肝组织IRS2mRNA表达的作用,而优降糖无此作用。展开更多
以2-氯喹啉和苯硼酸为原料,在四(三苯基膦)钯作催化剂下反应得到主配体2-苯基喹啉(pq),之后pq与水合三氯化铱在乙二醇单乙醚溶剂中反应得到铱的氯桥二聚体(pq)_2Ir(μ-Cl_2)Ir(pq)_2,然后在碱性条件下和乙酰丙酮反应合成出高效磷光红光...以2-氯喹啉和苯硼酸为原料,在四(三苯基膦)钯作催化剂下反应得到主配体2-苯基喹啉(pq),之后pq与水合三氯化铱在乙二醇单乙醚溶剂中反应得到铱的氯桥二聚体(pq)_2Ir(μ-Cl_2)Ir(pq)_2,然后在碱性条件下和乙酰丙酮反应合成出高效磷光红光材料二(2-苯基喹啉-C2,N')(乙酰丙酮)合铱(Ⅲ)Ir(pq)_2(acac)。通过元素分析、红外光谱、核磁共振谱(~1 H NMR、^(13)C NMR)、质谱和单晶X射线衍射等表征手段确定了分子结构,利用紫外-可见吸收光谱和光致发光光谱对其光物理性能进行了测试。结果表明,Ir(pq)_2(acac)为电中性八面体配合物,Ir—O键的平均长度为0.21741(18)nm,而Ir—C键的平均长度0.1983(3)nm,Ir—N键的平均长度为0.2079(2)nm,在600nm处出现了较强的红光发射,其合成产率>95%,该方法适于Ir(pq)_2(acac)的小批量制备。展开更多
基金financially supported by the National Key Research and Development Program of China (2021YFD1300600)the Sichuan Science and Technology Program, China (2021YFYZ0007 and 2022YFYZ0005)the China Agriculture Research System of MOF and MARA (CARS-40-K06)。
文摘The liver is a vital organ in chickens that performs a number of crucial physiological functions, including the storage of hepatic glycogen, protein synthesis, detoxification, and deoxidation. The growth and metabolism of the liver are complex processes influenced by factors such as environment, diet, and genetics. MicroRNAs(miRNAs), as posttranscriptional regulatory molecules, play a role in various biological processes. There is growing evidence that miR-27b-5p plays a key role in the regulation of liver development and metabolism in various species. However, its role in chicken livers has yet to be determined. In our experiment, we found that chickens with fatty livers had significantly higher levels of serum triglyceride(TG) and total cholesterol(TC) compared to the normal chickens, while the control group had significantly higher levels of very low-density lipoprotein(VLDL) and serum hormones. Further research showed that the mRNA of miR-27b-5p was highly expressed in fatty livers. By exploring the function of miR-27b-5p in chicken livers, we discovered that it promotes lipogenesis, oxidative stress, and inflammatory responses, leading to hepatocyte apoptosis. Our study also established the mechanism by which miR-27b-5p interacts with its target gene, and found that miR-27b-5p targets insulin receptor substrate 2(IRS2) and modulates the PI3K/AKT signaling pathway. Additionally, our investigation of IRS2 in chicken hepatocytes revealed that knocking down IRS2 has the same effects as overexpressing miR-27b-5p. In conclusion, our study revealed that miR-27b-5p directly binds to IRS2, inhibiting the PI3K/AKT signaling pathway and causing steatosis, oxidative stress, inflammation, and apoptosis in chicken liver.
文摘目的:探讨针刺对2型糖尿病(T2DM)大鼠肝组织胰岛素受体底物1和2基因(IRS1和2mRNA)表达的影响。方法:给食源性肥胖大鼠腹腔注射小剂量链脲佐菌素(STZ)(25mg/kg)造模成T2DM大鼠,随机分为针刺组、优降糖组和模型组,处理4周后,用快速血糖仪检测空腹血糖(FBS)、用放免法检测空腹胰岛素(FINS)、用实时定量荧光PCR(real-tim e RT PCR)法检测肝组织IRS1和2mRNA表达,并与正常组大鼠进行对照。结果:针刺组和优降糖组FBS和FINS比模型组显著降低(P<0.05);模型组IRS1mRNA相对含量是正常组的25%,针刺组为正常组的2.83倍,优降糖组为正常组的1.23倍。模型组IRS2mRNA相对含量为正常组的2.19倍,针刺组IRS2mRNA相对含量为正常组的4.84%,优降糖组IRS2mRNA相对含量为正常组的4.59倍。结论:肝组织IRS1和2mRNA表达异常可能是T2DM的发病机制之一,针刺和优降糖均可上调T2DM大鼠肝组织IRS1mRNA的表达,针刺对T2DM大鼠肝组织IRS1 mRNA表达的上调作用优于优降糖;针刺具有显著抑制T2DM大鼠肝组织IRS2mRNA表达的作用,而优降糖无此作用。
文摘近年来,许多实际应用不仅需要支持空间连接查询而且需要具备关键词搜索功能,以帮助用户查找那些既满足空间连接条件又包含指定关键词的空间对象组合。正是在这种需求的驱动之下,定义了一种具备关键词搜索功能的空间连接查询(Spatial Join with Keyword Search,缩写SJKS),并提出了一种基于IR2-Tree的SJKS查询处理算法(IR2-TreeSJKS算法),旨在实现关键词搜索与空间连接查询的高效结合。实验表明,本算法可有效支持具有关键词搜索功能的空间连接查询处理。
文摘以2-氯喹啉和苯硼酸为原料,在四(三苯基膦)钯作催化剂下反应得到主配体2-苯基喹啉(pq),之后pq与水合三氯化铱在乙二醇单乙醚溶剂中反应得到铱的氯桥二聚体(pq)_2Ir(μ-Cl_2)Ir(pq)_2,然后在碱性条件下和乙酰丙酮反应合成出高效磷光红光材料二(2-苯基喹啉-C2,N')(乙酰丙酮)合铱(Ⅲ)Ir(pq)_2(acac)。通过元素分析、红外光谱、核磁共振谱(~1 H NMR、^(13)C NMR)、质谱和单晶X射线衍射等表征手段确定了分子结构,利用紫外-可见吸收光谱和光致发光光谱对其光物理性能进行了测试。结果表明,Ir(pq)_2(acac)为电中性八面体配合物,Ir—O键的平均长度为0.21741(18)nm,而Ir—C键的平均长度0.1983(3)nm,Ir—N键的平均长度为0.2079(2)nm,在600nm处出现了较强的红光发射,其合成产率>95%,该方法适于Ir(pq)_2(acac)的小批量制备。
