目的:探讨核因子κB活化对THP-1巨噬细胞源性泡沫细胞ATP结合盒转运子A1(ABCA1)基因表达的影响。方法:体外培养THP-1细胞并构建泡沫细胞模型,使用肿瘤坏死因子α(TNF-α)和NF-κB活化抑制剂对甲苯磺酰-L-苯丙氨酸甲基甲酮(N--αtosyl-L-...目的:探讨核因子κB活化对THP-1巨噬细胞源性泡沫细胞ATP结合盒转运子A1(ABCA1)基因表达的影响。方法:体外培养THP-1细胞并构建泡沫细胞模型,使用肿瘤坏死因子α(TNF-α)和NF-κB活化抑制剂对甲苯磺酰-L-苯丙氨酸甲基甲酮(N--αtosyl-L-phenylalan ine chlorom ethy ketone,TPCK)孵育细胞,以RT-PCR法和W estern b lot法测定THP-1源性泡沫细胞ABCA1 mRNA和蛋白表达情况,借助Sandw ich ELISA法观察核因子κB活化/核易位情况。结果:TNF-α可即刻激活NF-κB,并导致干预24小时后泡沫细胞ABCA1 mRNA和蛋白表达下调;若预先用TPCK孵育,则TPCK可抑制TNF-α对NF-κB的激活,且24小时后泡沫细胞ABCA1 mRNA和蛋白表达下调幅度减小;TPCK延迟孵育则对TNF-α的效应抑制不显著。结论:炎症因子TNF-α可即刻激活NF-κB信号途径,早期活化的NF-κB可阻遏THP-1源泡沫细胞ABCA1基因和蛋白的表达,影响泡沫细胞内胆固醇的流出。展开更多
The title compound (C30H32NO4PGe), O,O-dimethyl-N-(β-triphenylgermanyl) propionyl-α-aminobenzylphosphonates was synthesized by a convenient method, and its crystal structure was determined by single-crystal X-ray di...The title compound (C30H32NO4PGe), O,O-dimethyl-N-(β-triphenylgermanyl) propionyl-α-aminobenzylphosphonates was synthesized by a convenient method, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal is triclinic, space group P-1 with parameters: a=9.7753(5), b=11.5773(5), c=13.5059(6) ?, α=104.185(1),β= 95.971(1), γ =96.727(1)°, V=1457.63(12) ?3, Z=2, Mr=574.13, Dc=1.308 g/cm3, λ=0.71073 ?, μ = 1.139mm-1, and F(000)=596. The structure was solved by direct methods. The structure was refined to R=0.0257, wR=0.0705 for 5080 observed reflections with I >2σ(I).The result of structure analysis indicates that atom Ge is sp3 hydridized because the arrangement of the four carbon atoms bonded to it is a distorted tetrahedron. The geometry of the three phenyl groups linking with the Ge atom looks like a propeller form.展开更多
文摘目的:探讨核因子κB活化对THP-1巨噬细胞源性泡沫细胞ATP结合盒转运子A1(ABCA1)基因表达的影响。方法:体外培养THP-1细胞并构建泡沫细胞模型,使用肿瘤坏死因子α(TNF-α)和NF-κB活化抑制剂对甲苯磺酰-L-苯丙氨酸甲基甲酮(N--αtosyl-L-phenylalan ine chlorom ethy ketone,TPCK)孵育细胞,以RT-PCR法和W estern b lot法测定THP-1源性泡沫细胞ABCA1 mRNA和蛋白表达情况,借助Sandw ich ELISA法观察核因子κB活化/核易位情况。结果:TNF-α可即刻激活NF-κB,并导致干预24小时后泡沫细胞ABCA1 mRNA和蛋白表达下调;若预先用TPCK孵育,则TPCK可抑制TNF-α对NF-κB的激活,且24小时后泡沫细胞ABCA1 mRNA和蛋白表达下调幅度减小;TPCK延迟孵育则对TNF-α的效应抑制不显著。结论:炎症因子TNF-α可即刻激活NF-κB信号途径,早期活化的NF-κB可阻遏THP-1源泡沫细胞ABCA1基因和蛋白的表达,影响泡沫细胞内胆固醇的流出。
文摘The title compound (C30H32NO4PGe), O,O-dimethyl-N-(β-triphenylgermanyl) propionyl-α-aminobenzylphosphonates was synthesized by a convenient method, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal is triclinic, space group P-1 with parameters: a=9.7753(5), b=11.5773(5), c=13.5059(6) ?, α=104.185(1),β= 95.971(1), γ =96.727(1)°, V=1457.63(12) ?3, Z=2, Mr=574.13, Dc=1.308 g/cm3, λ=0.71073 ?, μ = 1.139mm-1, and F(000)=596. The structure was solved by direct methods. The structure was refined to R=0.0257, wR=0.0705 for 5080 observed reflections with I >2σ(I).The result of structure analysis indicates that atom Ge is sp3 hydridized because the arrangement of the four carbon atoms bonded to it is a distorted tetrahedron. The geometry of the three phenyl groups linking with the Ge atom looks like a propeller form.
