This study aimed to explore the mechanism of a novel mutation （p.Lys38Glu） in apolipoprotein H （APOH） gene causing hereditary beta2-glycoprotein I （β2GPI） deficiency and thrombosis in a proband with thrombophil...This study aimed to explore the mechanism of a novel mutation （p.Lys38Glu） in apolipoprotein H （APOH） gene causing hereditary beta2-glycoprotein I （β2GPI） deficiency and thrombosis in a proband with thrombophilia. The plasma level of β2GPI was measured by ELISA and Western blotting, and anti-β2GPI antibody by ELISA. Lupus anticoagulant （LA） was assayed using the dilute Russell viper venom time. Deficiency of the major natural anticoagulants including protein C （PC）, protein S （PS）, antithrombin （AT） and thrombomodulin （TM） was excluded from the proband. A mutation analysis was performed by amplification and sequencing of the APOH gene. Wild type and mutant （c.112A〉G） APOH expression plasmids were constructed and transfected into HEK293T cells. The results showed that the thrornbin generation capacity of the proband was higher than that of the other family members. Missense mutation p.Lys38Glu in APOH gene and LA coexisted in the proband. The mutation led to β2GPI deficiency and thrombosis by impairing the protein production and inhibiting the platelet aggregation. It was concluded that the recurrent thrombosis of the proband is associated with the coexistence ofp.Lys38Glu mutation in APOH gene and LA in plasma.展开更多
研究β2糖蛋白I(β2GPI)与肝细胞相互作用的过程,以进一步探讨β2GPI在乙型肝炎病毒感染肝细胞过程中所发挥的作用。采用L igand b lot技术,从SMMC-7721、HL-60及SGC-7901三个细胞株中,筛选出具有与人β2GPI特异结合蛋白成分的细胞。SMM...研究β2糖蛋白I(β2GPI)与肝细胞相互作用的过程,以进一步探讨β2GPI在乙型肝炎病毒感染肝细胞过程中所发挥的作用。采用L igand b lot技术,从SMMC-7721、HL-60及SGC-7901三个细胞株中,筛选出具有与人β2GPI特异结合蛋白成分的细胞。SMMC-7721细胞在40kD处出现一特异染色带,而HL-60及SGC-7901二种细胞则无此反应。在SMMC-7721细胞中存在有与人β2GPI特异结合的蛋白,这种蛋白可能参与了HBV感染肝细胞的过程。展开更多
文摘This study aimed to explore the mechanism of a novel mutation （p.Lys38Glu） in apolipoprotein H （APOH） gene causing hereditary beta2-glycoprotein I （β2GPI） deficiency and thrombosis in a proband with thrombophilia. The plasma level of β2GPI was measured by ELISA and Western blotting, and anti-β2GPI antibody by ELISA. Lupus anticoagulant （LA） was assayed using the dilute Russell viper venom time. Deficiency of the major natural anticoagulants including protein C （PC）, protein S （PS）, antithrombin （AT） and thrombomodulin （TM） was excluded from the proband. A mutation analysis was performed by amplification and sequencing of the APOH gene. Wild type and mutant （c.112A〉G） APOH expression plasmids were constructed and transfected into HEK293T cells. The results showed that the thrornbin generation capacity of the proband was higher than that of the other family members. Missense mutation p.Lys38Glu in APOH gene and LA coexisted in the proband. The mutation led to β2GPI deficiency and thrombosis by impairing the protein production and inhibiting the platelet aggregation. It was concluded that the recurrent thrombosis of the proband is associated with the coexistence ofp.Lys38Glu mutation in APOH gene and LA in plasma.
文摘研究β2糖蛋白I(β2GPI)与肝细胞相互作用的过程,以进一步探讨β2GPI在乙型肝炎病毒感染肝细胞过程中所发挥的作用。采用L igand b lot技术,从SMMC-7721、HL-60及SGC-7901三个细胞株中,筛选出具有与人β2GPI特异结合蛋白成分的细胞。SMMC-7721细胞在40kD处出现一特异染色带,而HL-60及SGC-7901二种细胞则无此反应。在SMMC-7721细胞中存在有与人β2GPI特异结合的蛋白,这种蛋白可能参与了HBV感染肝细胞的过程。
