目的研究依巴斯汀对肥大细胞活化剂C48/80体外诱导肥大细胞脱颗粒和细胞因子释放效应的影响,探讨依巴斯汀治疗荨麻疹的作用机制。方法依巴斯汀处理C48/80诱导活化的肥大细胞,通过MTT法检测细胞活力,β-氨基己糖苷酶脱颗粒试验检测细胞...目的研究依巴斯汀对肥大细胞活化剂C48/80体外诱导肥大细胞脱颗粒和细胞因子释放效应的影响,探讨依巴斯汀治疗荨麻疹的作用机制。方法依巴斯汀处理C48/80诱导活化的肥大细胞,通过MTT法检测细胞活力,β-氨基己糖苷酶脱颗粒试验检测细胞脱颗粒效应,ELISA法检测细胞分泌TNF-α、IL-4、IL-1β、LTB4、LTE4和组胺水平,q-PCR检测肥大细胞MCP-1、MCP-3、eotaxin、TNF-α、IL-4、IL-1β、IL-5及IL-6 m RNA表达水平。结果依巴斯汀浓度加倍处理肥大细胞能抑制其脱颗粒,其中4倍浓度(4×10^(-4)mmol/L)时抑制脱颗粒有极其显著差异(P<0.001)。依巴斯汀能抑制肥大细胞分泌IL-1β、TNF-α、IL-4、LTE4和组胺,但LTB4分泌没有差异;以浓度依赖方式显著抑制MCP-1、MCP-3、eotaxin、TNF-α、IL-4、IL-1β、IL-5及IL-6在m RNA表达(P<0.001),其中4倍和8倍剂量效应最显著,但二者抑制效果相当。结论依巴斯汀能显著抑制C48/80诱导肥大细胞脱颗粒、细胞因子和趋化因子的转录表达从而抑制炎症过程,但4倍浓度抑制效果最好,故研究结果为临床荨麻疹治疗提供了新思考。展开更多
The molecule with Th symmetry is rare. A novel C60-1ike molecule C48O12 with rare Th symmetry has been studied at the B3LYP/6-31G(d) level of theory. Its structural, electronic, vibrational, NMR, and thermodynamic p...The molecule with Th symmetry is rare. A novel C60-1ike molecule C48O12 with rare Th symmetry has been studied at the B3LYP/6-31G(d) level of theory. Its structural, electronic, vibrational, NMR, and thermodynamic properties have been calculated at the B3LYP/6-31G(d) level of theory. Vibrational modes have been assigned according to their symmetry. There are 73 independent vibrational modes: 22 IR-active modes with Tu symmetry and 37 Raman-active modes with Ag, Eg and Tg symmetry, respectively. The heat of formation has been calculated by using isodesmic reactions, 765.7 kJ mol-1. According to the heat of formation and the HOMO-LUMO gap, C48O12 with rare Th symmetry is more stable than C6o.展开更多
The molecule with Th symmetry is rare. Two C60-1ike molecules C48N12 and C48B12 with rare Th symmetry have been reported here, which is an approach to seek for the molecule with rare Th symmetry. Their structural, ele...The molecule with Th symmetry is rare. Two C60-1ike molecules C48N12 and C48B12 with rare Th symmetry have been reported here, which is an approach to seek for the molecule with rare Th symmetry. Their structural, electronic, vibrational, NMR, and thermodynamic properties have been calculated at the B3LYP/6-31G(d) level of theory. Vibrational modes have been assigned according to their symmetry. They all have 73 independent vibrational modes: 22 IR-active modes with Tu symmetry and 37 Raman-active modes with Ag, Eg and Tg symmetry, respectively. The heats of formation have been calculated using isodesmic reactions, and the values of C48N12 and C48B12 are 3812.0 and 3423.8 kJ mo1-1, respectively. According to the estimated band gaps for their fcc solid, they are all semiconducting materials, like C60, especially C48B12-based fcc solid.展开更多
文摘目的研究依巴斯汀对肥大细胞活化剂C48/80体外诱导肥大细胞脱颗粒和细胞因子释放效应的影响,探讨依巴斯汀治疗荨麻疹的作用机制。方法依巴斯汀处理C48/80诱导活化的肥大细胞,通过MTT法检测细胞活力,β-氨基己糖苷酶脱颗粒试验检测细胞脱颗粒效应,ELISA法检测细胞分泌TNF-α、IL-4、IL-1β、LTB4、LTE4和组胺水平,q-PCR检测肥大细胞MCP-1、MCP-3、eotaxin、TNF-α、IL-4、IL-1β、IL-5及IL-6 m RNA表达水平。结果依巴斯汀浓度加倍处理肥大细胞能抑制其脱颗粒,其中4倍浓度(4×10^(-4)mmol/L)时抑制脱颗粒有极其显著差异(P<0.001)。依巴斯汀能抑制肥大细胞分泌IL-1β、TNF-α、IL-4、LTE4和组胺,但LTB4分泌没有差异;以浓度依赖方式显著抑制MCP-1、MCP-3、eotaxin、TNF-α、IL-4、IL-1β、IL-5及IL-6在m RNA表达(P<0.001),其中4倍和8倍剂量效应最显著,但二者抑制效果相当。结论依巴斯汀能显著抑制C48/80诱导肥大细胞脱颗粒、细胞因子和趋化因子的转录表达从而抑制炎症过程,但4倍浓度抑制效果最好,故研究结果为临床荨麻疹治疗提供了新思考。
基金supported by the Natural Science Foundation of Shandong Province(No.ZR2011BM022)
文摘The molecule with Th symmetry is rare. A novel C60-1ike molecule C48O12 with rare Th symmetry has been studied at the B3LYP/6-31G(d) level of theory. Its structural, electronic, vibrational, NMR, and thermodynamic properties have been calculated at the B3LYP/6-31G(d) level of theory. Vibrational modes have been assigned according to their symmetry. There are 73 independent vibrational modes: 22 IR-active modes with Tu symmetry and 37 Raman-active modes with Ag, Eg and Tg symmetry, respectively. The heat of formation has been calculated by using isodesmic reactions, 765.7 kJ mol-1. According to the heat of formation and the HOMO-LUMO gap, C48O12 with rare Th symmetry is more stable than C6o.
基金supported by the Natural Science Foundation of Shandong Province (No. ZR2011BM022)
文摘The molecule with Th symmetry is rare. Two C60-1ike molecules C48N12 and C48B12 with rare Th symmetry have been reported here, which is an approach to seek for the molecule with rare Th symmetry. Their structural, electronic, vibrational, NMR, and thermodynamic properties have been calculated at the B3LYP/6-31G(d) level of theory. Vibrational modes have been assigned according to their symmetry. They all have 73 independent vibrational modes: 22 IR-active modes with Tu symmetry and 37 Raman-active modes with Ag, Eg and Tg symmetry, respectively. The heats of formation have been calculated using isodesmic reactions, and the values of C48N12 and C48B12 are 3812.0 and 3423.8 kJ mo1-1, respectively. According to the estimated band gaps for their fcc solid, they are all semiconducting materials, like C60, especially C48B12-based fcc solid.