A microwave-assisted solid phase synthesis for endothelin 1 is presented.Reduced endothelin 1 was synthesized efficiently on Wang resin under microwave irradiation using Fmoc/tBu orthogonal protection strategy.The who...A microwave-assisted solid phase synthesis for endothelin 1 is presented.Reduced endothelin 1 was synthesized efficiently on Wang resin under microwave irradiation using Fmoc/tBu orthogonal protection strategy.The whole peptide was cleaved from the resin and two disulphide bridges were formed under air oxidation at room temperature.The purity and efficiency of synthesizing the peptide is much higher than other methods used before.展开更多
基金supported by the key project of Chinese Ministry of Education(No.109086)
文摘A microwave-assisted solid phase synthesis for endothelin 1 is presented.Reduced endothelin 1 was synthesized efficiently on Wang resin under microwave irradiation using Fmoc/tBu orthogonal protection strategy.The whole peptide was cleaved from the resin and two disulphide bridges were formed under air oxidation at room temperature.The purity and efficiency of synthesizing the peptide is much higher than other methods used before.
文摘目的探讨不同病情程度支气管哮喘患儿血管内皮生长因子(vascular endothelial growth factor,VEGF)、内皮素1(endothelin-1,ET-1)水平与气道炎症、肺功能的相关性,以期为临床早期评估病情、制定干预方案提供参考。方法选取我院80例支气管哮喘患儿作为研究对象,其中轻度44例,中-重度36例,统计所有患儿临床资料、肺功能[呼气峰流速(peak expiratory flow rate,PEF)、1秒内用力呼气容积(forced expiratory volume within 1 second,FEV1)、FEV1占预计值百分比(FEV1 as a percentage of expected value,FEV1%)]、痰液气道炎症指标[白细胞介素6(interleukin-6,IL-6)、白细胞介素10(interleukin-10,IL-10)、肿瘤坏死因子α(tumor necrosis factor-α,TNF)-α]、VEGF、ET-1水平,分析VEGF、ET-1水平与气道炎症、肺功能相关性及对支气管哮喘患儿病情的影响及评估价值。结果不同病情程度患儿肺功能指标(FEV1、FEV1%、PEF)、气道炎症指标(痰液IL-6、IL-10、TNF-α)及血清VEGF、ET-1水平比较差异有统计学意义(P<0.05);支气管哮喘患儿血清VEGF、ET-1与肺功能指标FEV1、FEV1%、PEF及痰液气道炎症指标IL-10呈负相关(P<0.05),与痰液气道炎症指标IL-6、TNF-α呈正相关(P<0.05);VEGF、ET-1水平联合评估支气管哮喘患儿病情程度的AUC值为0.912,大于单一指标评估;支气管哮喘患儿VEGF、ET-1高水平时,病情加重风险是低水平的2.922倍(95%CI:1.678~5.089)、2.641倍(95%CI:1.514~4.608);经Logistic回归分析,结果显示VEGF、ET-1均为支气管哮喘患者病情程度加重的危险因素(P<0.05);VEGF、ET-1在支气管哮喘患儿病情加重风险中存在正相加交互作用,二者同时存在时效应增强。结论VEGF、ET-1与支气管哮喘患儿气道炎症及肺功能具有显著相关性,临床可通过其水平变化早期评估病情,以针对性展开后续治疗,改善预后。
