目的观察重症肌无力(myasthenia gravis,MG)患儿血清YKL-40水平变化情况,探讨其临床意义。方法收集2017年1月~2020年10月在西安医学院第一附属医院治疗的42例MG患儿及50例对照组儿童血液样本。采用ELISA法检测比较各组血清YKL-40水平,...目的观察重症肌无力(myasthenia gravis,MG)患儿血清YKL-40水平变化情况,探讨其临床意义。方法收集2017年1月~2020年10月在西安医学院第一附属医院治疗的42例MG患儿及50例对照组儿童血液样本。采用ELISA法检测比较各组血清YKL-40水平,分析血清YKL-40水平与定量重症肌无力(QMG)评分的相关性,探讨MG患儿血清YKL-40水平对病情严重程度的评估价值。结果MG患儿血清YKL-40水平显著高于对照组(83.35±15.26 ng/ml vs 47.75±7.45 ng/ml),差异有统计学意义(Z=7.823,P<0.001),全身型(Ⅱa型+Ⅱb型)患儿血清YKL-40水平高于眼肌型(Ⅰ型)患儿,差异有统计学意义(t=2.214,P<0.05),急性期患儿血清YKL-40水平明显高于缓解期患儿(83.35±17.05ng/ml vs 78.98±17.63ng/ml),差异有统计学意义(t=7.324,P<0.001)。MG患儿血清YKL-40水平与QMG评分呈正相关关系(r=0.616,P<0.001)。多元线性回归分析结果显示血清YKL-40水平是MG患儿QMG评分的独立影响因素(Beta=0.659,P<0.001)。ROC曲线分析结果显示血清YKL-40预测高四分位QMG评分的曲线下面积为0.828(0.703,0.953)。结论MG患儿血清YKL-40水平升高,可能与MG急性起病及病情严重程度相关。展开更多
Pueraria thomsonii has long been used in traditional Chinese medicine.Isoflavonoids are the principle pharmacologically active components,which are primarily observed as glycosyl-conjugates and accumulate in P.thomson...Pueraria thomsonii has long been used in traditional Chinese medicine.Isoflavonoids are the principle pharmacologically active components,which are primarily observed as glycosyl-conjugates and accumulate in P.thomsonii roots.However,the molecular mechanisms underlying the glycosylation processes in(iso)flavonoid biosynthesis have not been thoroughly elucidated.In the current study,an O-glucosyltransferase(PtUGT8)was identified in the medicinal plant P.thomsonii from RNA-seq database.Biochemical assays of the recombinant PtUGT8 showed that it was able to glycosylate chalcone(isoliquiritigenin)at the 4-OH position and glycosylate isoflavones(daidzein,formononetin,and genistein)at the 7-OH or 4′-OH position,exhibiting no enzyme activity to flavonones(liquiritigenin and narigenin)in vitro.The identification of PtUGT8 may provide a useful enzyme catalyst for efficient biotransformation of isoflavones and other natural products for food or pharmacological applications.展开更多
文摘目的观察重症肌无力(myasthenia gravis,MG)患儿血清YKL-40水平变化情况,探讨其临床意义。方法收集2017年1月~2020年10月在西安医学院第一附属医院治疗的42例MG患儿及50例对照组儿童血液样本。采用ELISA法检测比较各组血清YKL-40水平,分析血清YKL-40水平与定量重症肌无力(QMG)评分的相关性,探讨MG患儿血清YKL-40水平对病情严重程度的评估价值。结果MG患儿血清YKL-40水平显著高于对照组(83.35±15.26 ng/ml vs 47.75±7.45 ng/ml),差异有统计学意义(Z=7.823,P<0.001),全身型(Ⅱa型+Ⅱb型)患儿血清YKL-40水平高于眼肌型(Ⅰ型)患儿,差异有统计学意义(t=2.214,P<0.05),急性期患儿血清YKL-40水平明显高于缓解期患儿(83.35±17.05ng/ml vs 78.98±17.63ng/ml),差异有统计学意义(t=7.324,P<0.001)。MG患儿血清YKL-40水平与QMG评分呈正相关关系(r=0.616,P<0.001)。多元线性回归分析结果显示血清YKL-40水平是MG患儿QMG评分的独立影响因素(Beta=0.659,P<0.001)。ROC曲线分析结果显示血清YKL-40预测高四分位QMG评分的曲线下面积为0.828(0.703,0.953)。结论MG患儿血清YKL-40水平升高,可能与MG急性起病及病情严重程度相关。
基金supported by the National Key Research and Development Program of China(Nos.2017YFC1702901 and 2017YFC1701601)CAMS Innovation Fund for Medical Sciences(No.2019-I2M-5-065)。
文摘Pueraria thomsonii has long been used in traditional Chinese medicine.Isoflavonoids are the principle pharmacologically active components,which are primarily observed as glycosyl-conjugates and accumulate in P.thomsonii roots.However,the molecular mechanisms underlying the glycosylation processes in(iso)flavonoid biosynthesis have not been thoroughly elucidated.In the current study,an O-glucosyltransferase(PtUGT8)was identified in the medicinal plant P.thomsonii from RNA-seq database.Biochemical assays of the recombinant PtUGT8 showed that it was able to glycosylate chalcone(isoliquiritigenin)at the 4-OH position and glycosylate isoflavones(daidzein,formononetin,and genistein)at the 7-OH or 4′-OH position,exhibiting no enzyme activity to flavonones(liquiritigenin and narigenin)in vitro.The identification of PtUGT8 may provide a useful enzyme catalyst for efficient biotransformation of isoflavones and other natural products for food or pharmacological applications.