Bet v 1基因家族编码植物病程相关蛋白PR10,参与植物的非生物和生物胁迫应答。本研究对新疆沙冬青Bet v 1基因家族进行筛选和进化分析,并通过实时荧光定量PCR分析了Bet v 1基因在低温和渗透胁迫下的表达模式。结果表明筛选到27个新疆沙...Bet v 1基因家族编码植物病程相关蛋白PR10,参与植物的非生物和生物胁迫应答。本研究对新疆沙冬青Bet v 1基因家族进行筛选和进化分析,并通过实时荧光定量PCR分析了Bet v 1基因在低温和渗透胁迫下的表达模式。结果表明筛选到27个新疆沙冬青Bet v 1基因家族成员,均包含内含子,分布于6条染色体上。在新疆沙冬青中有11个Bet v 1基因在大豆、拟南芥基因组中具有直系同源基因。该基因家族成员的启动子中含有大量与逆境胁迫和激素响应相关的元件。基因表达分析显示EVM0015604.1、EVM0020624.1、EVM000-0761.1、EVM0033568.1和EVM0004485.1的表达量在低温和渗透胁迫下升高,推测Bet v 1基因参与了新疆沙冬青响应低温和干旱胁迫。本研究为理解植物Bet v 1基因的功能提供了一定的理论依据。展开更多
大豆疫霉根腐病是由大豆疫霉菌(Phytophthora sojae)引起的危害大豆生长的严重病害。课题组前期研究表明具有P-loop结构域的GmPR10(Gene Bank accession no.FJ960440)和具有P-loop、Bet v1结构域的Gly m 4l(Gene Bank accession no.HQ91...大豆疫霉根腐病是由大豆疫霉菌(Phytophthora sojae)引起的危害大豆生长的严重病害。课题组前期研究表明具有P-loop结构域的GmPR10(Gene Bank accession no.FJ960440)和具有P-loop、Bet v1结构域的Gly m 4l(Gene Bank accession no.HQ913577.1)抑制大豆疫霉菌生长,并且过表达GmPR10和Gly m 4l的转基因大豆植株可以提高对大豆疫霉根腐病的抗性。为研究GmPR10和Gly m 4l抑菌机理,本研究利用点突变技术,获得了GmPR10的P-loop结构域突变体(Gly48/Thr48和Gly^51/Arg^51)、Gly m 4l的P-loop结构域突变体(Gly^49/Ile^49和Lys^55/Pro^55)、GmPR10和Gly m 4l的P-loop结构域以及Gly m 4l的Bet v1结构域缺失突变体,并纯化回收相应突变体蛋白,进行体外抑制大豆疫霉菌试验。结果表明,突变或缺失P-loop,Bet v1结构域的GmPR10和Gly m 4l失去了抑制大豆疫霉菌(Race 1)生长的能力,说明P-loop、Bet v 1结构域对GmPR10和Gly m 4l行使抑菌功能至关重要。展开更多
Malignant gliomas are highly invasive tumors that 1use the cerebral vessels for invasion due to high vascular fragility of the blood--brain barrier(BBB).On one hand,glioma is characterized by the BBB disruption,on the...Malignant gliomas are highly invasive tumors that 1use the cerebral vessels for invasion due to high vascular fragility of the blood--brain barrier(BBB).On one hand,glioma is characterized by the BBB disruption,on the other hand,drug brain delivery via the BBB is a big challenge in glioma therapy.The limited information about vascular changes associated with glioma growth is a reason of slow progress in prevention of glioma development.Here,we present in vrivo and er vrivo study of the BBB disruption and glioma cells(GCs)migration in rats using fuorescence and confocal microscopy.We uncovered a local breach in the BBB in the main tumor mass but not within the border of normal and malignant cells,where the BBB was impermeable for high weight molecules.The migr ation of GCs were observed via the cerebral vessels with the intact BBB that was associated with macrophages infiltration.The mechanisms underlying glioma progression remain umknown but there is an evidence that the sympathetic nervous system(SNS)via activation of vascular beta2-adrenoreceptors(B2-ADRs)can play an important role in tumor metastasis.Our results clearly show an increase in the expression of vascular B2-ADRs and production of the beta arrestin-1-co-factor of B2-ADRs signaling pathway in rats with glioma.Pharmacological blockade of B2-ADRs reduces the BBB disruption,macrophages infiltration,GCs migration and increases survival rate.These data suggest that the blockade of B2-ADRs may be a novel adjuvant therapeutic strategy to reduce glioma progression and prevent metastasis。展开更多
目的研究北京地区桦树花粉过敏的主要致敏蛋白组分及其临床意义。方法采用横断面研究的方法将58例桦树花粉过敏的患者纳入研究。根据临床表现分为变应性鼻炎(allergic rhinitis,AR)和过敏性哮喘(allergic asthma,AA)组。采用ImmunoCAP...目的研究北京地区桦树花粉过敏的主要致敏蛋白组分及其临床意义。方法采用横断面研究的方法将58例桦树花粉过敏的患者纳入研究。根据临床表现分为变应性鼻炎(allergic rhinitis,AR)和过敏性哮喘(allergic asthma,AA)组。采用ImmunoCAP荧光酶联免疫法检测患者血清桦树花粉sIgE浓度,以及桦树花粉主要致敏蛋白组分Bet v 1,Bet v 2,Bet v 4,Bet v 6 sIgE浓度并分级。分析桦树花粉和各组分蛋白sIgE在AR和AA中的差异。结果入组患者中,AR为44例(75.9%),AA为14例(24.1%)。单独春季花粉过敏的18例患者全部为AR患者,无AA患者。春秋季花粉过敏的患者共计40例,其中AR为26例(65%);AA为14例(35%)。58例纳入研究的患者均为桦树花粉sIgE 2级及以上阳性。4种桦树花粉的致敏蛋白组分中,对任意一种桦树花粉蛋白组分阳性占94.8%。单一组分致敏占77.6%;2种组分致敏占17.2%。Bet v 1和(或)Bet v 2阳性率为93.1%。4种蛋白组分的阳性率依次为:Bet v 1(82.8%)、Bet v 2(29.3%)、Bet v 6(1.7%)、Bet v 4(0)。桦树花粉sIgE和Bet v 1的sIgE级别呈显著正相关性(r=0.898,P<0.001)。Bet v 2的sIgE浓度在AA组显著高于AR组[(4.34±14.35)kUA/L vs(1.56±3.26)kUA/L,P<0.05],其他组分无显著性差异。结论北京地区桦树花粉的主要致敏蛋白组分为Bet v 1,桦树花粉组分蛋白以单一致敏为主,Bet v 1联合Bet v 2检测可诊断90%以上的桦树花粉过敏患者。展开更多
Subject Code:H16With the support by the National Natural Science Foundation of China,a collaborative study by the research groups led by Prof.Wang Chenji(王陈继)from Fudan University,Prof.Huang Haojie(黄浩杰)from Mayo...Subject Code:H16With the support by the National Natural Science Foundation of China,a collaborative study by the research groups led by Prof.Wang Chenji(王陈继)from Fudan University,Prof.Huang Haojie(黄浩杰)from Mayo Clinic and Sun Yinhao(孙颖浩)from the Second Military Medical University have展开更多
文摘Bet v 1基因家族编码植物病程相关蛋白PR10,参与植物的非生物和生物胁迫应答。本研究对新疆沙冬青Bet v 1基因家族进行筛选和进化分析,并通过实时荧光定量PCR分析了Bet v 1基因在低温和渗透胁迫下的表达模式。结果表明筛选到27个新疆沙冬青Bet v 1基因家族成员,均包含内含子,分布于6条染色体上。在新疆沙冬青中有11个Bet v 1基因在大豆、拟南芥基因组中具有直系同源基因。该基因家族成员的启动子中含有大量与逆境胁迫和激素响应相关的元件。基因表达分析显示EVM0015604.1、EVM0020624.1、EVM000-0761.1、EVM0033568.1和EVM0004485.1的表达量在低温和渗透胁迫下升高,推测Bet v 1基因参与了新疆沙冬青响应低温和干旱胁迫。本研究为理解植物Bet v 1基因的功能提供了一定的理论依据。
文摘大豆疫霉根腐病是由大豆疫霉菌(Phytophthora sojae)引起的危害大豆生长的严重病害。课题组前期研究表明具有P-loop结构域的GmPR10(Gene Bank accession no.FJ960440)和具有P-loop、Bet v1结构域的Gly m 4l(Gene Bank accession no.HQ913577.1)抑制大豆疫霉菌生长,并且过表达GmPR10和Gly m 4l的转基因大豆植株可以提高对大豆疫霉根腐病的抗性。为研究GmPR10和Gly m 4l抑菌机理,本研究利用点突变技术,获得了GmPR10的P-loop结构域突变体(Gly48/Thr48和Gly^51/Arg^51)、Gly m 4l的P-loop结构域突变体(Gly^49/Ile^49和Lys^55/Pro^55)、GmPR10和Gly m 4l的P-loop结构域以及Gly m 4l的Bet v1结构域缺失突变体,并纯化回收相应突变体蛋白,进行体外抑制大豆疫霉菌试验。结果表明,突变或缺失P-loop,Bet v1结构域的GmPR10和Gly m 4l失去了抑制大豆疫霉菌(Race 1)生长的能力,说明P-loop、Bet v 1结构域对GmPR10和Gly m 4l行使抑菌功能至关重要。
基金Grant of Russian Science Foundation No.17-75-20069.
文摘Malignant gliomas are highly invasive tumors that 1use the cerebral vessels for invasion due to high vascular fragility of the blood--brain barrier(BBB).On one hand,glioma is characterized by the BBB disruption,on the other hand,drug brain delivery via the BBB is a big challenge in glioma therapy.The limited information about vascular changes associated with glioma growth is a reason of slow progress in prevention of glioma development.Here,we present in vrivo and er vrivo study of the BBB disruption and glioma cells(GCs)migration in rats using fuorescence and confocal microscopy.We uncovered a local breach in the BBB in the main tumor mass but not within the border of normal and malignant cells,where the BBB was impermeable for high weight molecules.The migr ation of GCs were observed via the cerebral vessels with the intact BBB that was associated with macrophages infiltration.The mechanisms underlying glioma progression remain umknown but there is an evidence that the sympathetic nervous system(SNS)via activation of vascular beta2-adrenoreceptors(B2-ADRs)can play an important role in tumor metastasis.Our results clearly show an increase in the expression of vascular B2-ADRs and production of the beta arrestin-1-co-factor of B2-ADRs signaling pathway in rats with glioma.Pharmacological blockade of B2-ADRs reduces the BBB disruption,macrophages infiltration,GCs migration and increases survival rate.These data suggest that the blockade of B2-ADRs may be a novel adjuvant therapeutic strategy to reduce glioma progression and prevent metastasis。
文摘目的研究北京地区桦树花粉过敏的主要致敏蛋白组分及其临床意义。方法采用横断面研究的方法将58例桦树花粉过敏的患者纳入研究。根据临床表现分为变应性鼻炎(allergic rhinitis,AR)和过敏性哮喘(allergic asthma,AA)组。采用ImmunoCAP荧光酶联免疫法检测患者血清桦树花粉sIgE浓度,以及桦树花粉主要致敏蛋白组分Bet v 1,Bet v 2,Bet v 4,Bet v 6 sIgE浓度并分级。分析桦树花粉和各组分蛋白sIgE在AR和AA中的差异。结果入组患者中,AR为44例(75.9%),AA为14例(24.1%)。单独春季花粉过敏的18例患者全部为AR患者,无AA患者。春秋季花粉过敏的患者共计40例,其中AR为26例(65%);AA为14例(35%)。58例纳入研究的患者均为桦树花粉sIgE 2级及以上阳性。4种桦树花粉的致敏蛋白组分中,对任意一种桦树花粉蛋白组分阳性占94.8%。单一组分致敏占77.6%;2种组分致敏占17.2%。Bet v 1和(或)Bet v 2阳性率为93.1%。4种蛋白组分的阳性率依次为:Bet v 1(82.8%)、Bet v 2(29.3%)、Bet v 6(1.7%)、Bet v 4(0)。桦树花粉sIgE和Bet v 1的sIgE级别呈显著正相关性(r=0.898,P<0.001)。Bet v 2的sIgE浓度在AA组显著高于AR组[(4.34±14.35)kUA/L vs(1.56±3.26)kUA/L,P<0.05],其他组分无显著性差异。结论北京地区桦树花粉的主要致敏蛋白组分为Bet v 1,桦树花粉组分蛋白以单一致敏为主,Bet v 1联合Bet v 2检测可诊断90%以上的桦树花粉过敏患者。
文摘Subject Code:H16With the support by the National Natural Science Foundation of China,a collaborative study by the research groups led by Prof.Wang Chenji(王陈继)from Fudan University,Prof.Huang Haojie(黄浩杰)from Mayo Clinic and Sun Yinhao(孙颖浩)from the Second Military Medical University have
