47XYY syndrome is a rare sex chromosome variant with an extra Y chromosome. Most patients with a 47XYY karyotype have a normal phenotype. This disorder seems to be associated with a higher risk of developing behavior ...47XYY syndrome is a rare sex chromosome variant with an extra Y chromosome. Most patients with a 47XYY karyotype have a normal phenotype. This disorder seems to be associated with a higher risk of developing behavior and cognitive problems, tall stature and infertility in adulthood. We report here a rare case of 47, XYY syndrome associated with an 11-beta-hydroxylase deficiency revealed by a stature advance along with precocious puberty after obtaining informed consent from parents. To our knowledge, this is the first case reported in the literature.展开更多
目的探讨血清IL-11在急性脑梗死诊断和预后评估中的价值及其与血清脑源性神经营养因子(BDNF)的相关性。方法收集102例急性脑梗死患者(脑梗死组)和64名正常对照者(正常对照组)的一般临床资料。根据90 d mRS评分将脑梗死组分为预后良好亚...目的探讨血清IL-11在急性脑梗死诊断和预后评估中的价值及其与血清脑源性神经营养因子(BDNF)的相关性。方法收集102例急性脑梗死患者(脑梗死组)和64名正常对照者(正常对照组)的一般临床资料。根据90 d mRS评分将脑梗死组分为预后良好亚组和预后不良亚组。采用Pearson相关性分析血清IL-11和NIHSS评分、脑梗死体积、血清BDNF的相关性,Logistics回归分析脑梗死预后的影响因素,并绘制IL-11在脑梗死诊断和预后预测中的ROC曲线。结果脑梗死组高血压比率及糖化血红蛋白、低密度脂蛋白水平显著高于正常对照组(均P<0.05)。预后不良亚组的年龄、糖尿病比率、糖化血红蛋白水平、入院时NIHSS评分、脑梗死体积显著高于预后良好亚组(均P<0.05)。脑梗死组血清IL-11水平显著低于正常对照组(t=10.123,P<0.001)。脑梗死预后不良亚组血清IL-11水平显著低于预后良好亚组(t=7.438,P<0.001)。脑梗死患者血清IL-11表达与NIHSS评分(r=-0.603,P<0.001)及脑梗死体积(r=-0.681,P<0.001)呈负相关关系。Logistics回归分析显示,IL-11为影响脑梗死患者预后的保护性因素(OR=0.814,P=0.009),脑梗死体积(OR=2.262,P<0.001)和NIHSS评分(OR=2.107,P=0.006)为影响脑梗死预后的危险因素。当IL-11应用于脑梗死的诊断时,ROC曲线下面积为0.841,灵敏性为91.18%,特异性为72.42%,截断值为378.47;当IL-11应用于脑梗死预后预测时,ROC曲线下面积为0.786,灵敏性为67.09%,特异性为87.93%,截断值为310.94。脑梗死患者血清IL-11水平与血清BDNF水平的相关系数为r=0.711、P<0.01。结论脑梗死患者血清IL-11水平显著降低,且预后不良患者的IL-11水平显著低于预后良好亚组。同时,IL-11水平与血清BDNF水平呈负相关,可能可以用于脑梗死的辅助诊断和预后评估。展开更多
Astrocytes are important cellular centers of cholesterol synthesis and metabolism that help maintain normal physiological function at the organism level.Spinal cord injury results in aberrant cholesterol metabolism by...Astrocytes are important cellular centers of cholesterol synthesis and metabolism that help maintain normal physiological function at the organism level.Spinal cord injury results in aberrant cholesterol metabolism by astrocytes and excessive production of oxysterols,which have profound effects on neuropathology.25-Hydroxycholesterol(25-HC),the main product of the membrane-associated enzyme cholesterol-25-hydroxylase(CH25H),plays important roles in mediating neuroinflammation.However,whether the abnormal astrocyte cholesterol metabolism induced by spinal cord injury contributes to the production of 25-HC,as well as the resulting pathological effects,remain unclear.In the present study,spinal cord injury-induced activation of thrombin was found to increase astrocyte CH25H expression.A protease-activated receptor 1 inhibitor was able to attenuate this effect in vitro and in vivo.In cultured primary astrocytes,thrombin interacted with protease-activated receptor 1,mainly through activation of the mitogen-activated protein kinase/nuclear factor-kappa B signaling pathway.Conditioned culture medium from astrocytes in which ch25h expression had been knocked down by siRNA reduced macrophage migration.Finally,injection of the protease activated receptor 1 inhibitor SCH79797 into rat neural sheaths following spinal cord injury reduced migration of microglia/macrophages to the injured site and largely restored motor function.Our results demonstrate a novel regulatory mechanism for thrombin-regulated cholesterol metabolism in astrocytes that could be used to develop anti-inflammatory drugs to treat patients with spinal cord injury.展开更多
Flavonoids are important bioactive components in Dendrobium officinale,a medicinal orchid.They are involved in many biological activities,including protecting plants against biotic and abiotic stresses.Research on the...Flavonoids are important bioactive components in Dendrobium officinale,a medicinal orchid.They are involved in many biological activities,including protecting plants against biotic and abiotic stresses.Research on the key genes related to flavonoid biosynthesis in D.officinale is limited.In this study,one of the key flavonoid biosynthesis genes,flavanone 3-hydroxylase(F3H),was characterized from D.officinale.The open reading frame of DoF3H was 1134 bp long and it encoded a 377-amino acid protein.The DoF3H protein showed considerably high homology with F3H proteins from other plant species and shared a common evolutionary ancestor with other F3Hs.DoF3H transcripts were detected in different organs of adult plants and mainly accumulated in flowers,followed by roots,stems and leaves,a pattern that was similar to the content of flavonoids.Recombinant DoF3H protein,which was localized in the cytosol,could convert naringenin to dihydrokaempferol.The mRNA levels of DoF3H were significantly induced by salt and cold stresses.Furthermore,the heterologous expression of DoF3H in Escherichia coli conferred it higher tolerance to salt and cold stresses.These results provide insight into the molecular function of DoF3H in the biosynthesis of flavonoids,and provide a new application for improvement of abiotic tolerance in D.officinale.展开更多
文摘47XYY syndrome is a rare sex chromosome variant with an extra Y chromosome. Most patients with a 47XYY karyotype have a normal phenotype. This disorder seems to be associated with a higher risk of developing behavior and cognitive problems, tall stature and infertility in adulthood. We report here a rare case of 47, XYY syndrome associated with an 11-beta-hydroxylase deficiency revealed by a stature advance along with precocious puberty after obtaining informed consent from parents. To our knowledge, this is the first case reported in the literature.
文摘目的探讨血清IL-11在急性脑梗死诊断和预后评估中的价值及其与血清脑源性神经营养因子(BDNF)的相关性。方法收集102例急性脑梗死患者(脑梗死组)和64名正常对照者(正常对照组)的一般临床资料。根据90 d mRS评分将脑梗死组分为预后良好亚组和预后不良亚组。采用Pearson相关性分析血清IL-11和NIHSS评分、脑梗死体积、血清BDNF的相关性,Logistics回归分析脑梗死预后的影响因素,并绘制IL-11在脑梗死诊断和预后预测中的ROC曲线。结果脑梗死组高血压比率及糖化血红蛋白、低密度脂蛋白水平显著高于正常对照组(均P<0.05)。预后不良亚组的年龄、糖尿病比率、糖化血红蛋白水平、入院时NIHSS评分、脑梗死体积显著高于预后良好亚组(均P<0.05)。脑梗死组血清IL-11水平显著低于正常对照组(t=10.123,P<0.001)。脑梗死预后不良亚组血清IL-11水平显著低于预后良好亚组(t=7.438,P<0.001)。脑梗死患者血清IL-11表达与NIHSS评分(r=-0.603,P<0.001)及脑梗死体积(r=-0.681,P<0.001)呈负相关关系。Logistics回归分析显示,IL-11为影响脑梗死患者预后的保护性因素(OR=0.814,P=0.009),脑梗死体积(OR=2.262,P<0.001)和NIHSS评分(OR=2.107,P=0.006)为影响脑梗死预后的危险因素。当IL-11应用于脑梗死的诊断时,ROC曲线下面积为0.841,灵敏性为91.18%,特异性为72.42%,截断值为378.47;当IL-11应用于脑梗死预后预测时,ROC曲线下面积为0.786,灵敏性为67.09%,特异性为87.93%,截断值为310.94。脑梗死患者血清IL-11水平与血清BDNF水平的相关系数为r=0.711、P<0.01。结论脑梗死患者血清IL-11水平显著降低,且预后不良患者的IL-11水平显著低于预后良好亚组。同时,IL-11水平与血清BDNF水平呈负相关,可能可以用于脑梗死的辅助诊断和预后评估。
基金supported by the National Natural Science Foundation of ChinaNo.81971826 (to AG)+5 种基金the China Postdoctoral Science FoundationNo.2020M681 689 (to YH)the Scientific Research Project of The Health Commission of Jiangsu ProvinceNo.ZDB2020003 (to AG)the Basic Scientific Research Projects of NantongNo.JC2020041 (to YH)
文摘Astrocytes are important cellular centers of cholesterol synthesis and metabolism that help maintain normal physiological function at the organism level.Spinal cord injury results in aberrant cholesterol metabolism by astrocytes and excessive production of oxysterols,which have profound effects on neuropathology.25-Hydroxycholesterol(25-HC),the main product of the membrane-associated enzyme cholesterol-25-hydroxylase(CH25H),plays important roles in mediating neuroinflammation.However,whether the abnormal astrocyte cholesterol metabolism induced by spinal cord injury contributes to the production of 25-HC,as well as the resulting pathological effects,remain unclear.In the present study,spinal cord injury-induced activation of thrombin was found to increase astrocyte CH25H expression.A protease-activated receptor 1 inhibitor was able to attenuate this effect in vitro and in vivo.In cultured primary astrocytes,thrombin interacted with protease-activated receptor 1,mainly through activation of the mitogen-activated protein kinase/nuclear factor-kappa B signaling pathway.Conditioned culture medium from astrocytes in which ch25h expression had been knocked down by siRNA reduced macrophage migration.Finally,injection of the protease activated receptor 1 inhibitor SCH79797 into rat neural sheaths following spinal cord injury reduced migration of microglia/macrophages to the injured site and largely restored motor function.Our results demonstrate a novel regulatory mechanism for thrombin-regulated cholesterol metabolism in astrocytes that could be used to develop anti-inflammatory drugs to treat patients with spinal cord injury.
基金supported by the National Natural Science Foundation of China(Grant No.31871547)。
文摘Flavonoids are important bioactive components in Dendrobium officinale,a medicinal orchid.They are involved in many biological activities,including protecting plants against biotic and abiotic stresses.Research on the key genes related to flavonoid biosynthesis in D.officinale is limited.In this study,one of the key flavonoid biosynthesis genes,flavanone 3-hydroxylase(F3H),was characterized from D.officinale.The open reading frame of DoF3H was 1134 bp long and it encoded a 377-amino acid protein.The DoF3H protein showed considerably high homology with F3H proteins from other plant species and shared a common evolutionary ancestor with other F3Hs.DoF3H transcripts were detected in different organs of adult plants and mainly accumulated in flowers,followed by roots,stems and leaves,a pattern that was similar to the content of flavonoids.Recombinant DoF3H protein,which was localized in the cytosol,could convert naringenin to dihydrokaempferol.The mRNA levels of DoF3H were significantly induced by salt and cold stresses.Furthermore,the heterologous expression of DoF3H in Escherichia coli conferred it higher tolerance to salt and cold stresses.These results provide insight into the molecular function of DoF3H in the biosynthesis of flavonoids,and provide a new application for improvement of abiotic tolerance in D.officinale.
