[Objective] The aim was to better research the function and action mode of High Mobility Group B (HMGB) proteins in higher plants. [Method] At2G33450,At5G23405 and At5G23420 genes of HMGB protein family in Arabidops...[Objective] The aim was to better research the function and action mode of High Mobility Group B (HMGB) proteins in higher plants. [Method] At2G33450,At5G23405 and At5G23420 genes of HMGB protein family in Arabidopsis thaliana were cloned by the use of RT-PCR method,and the expression of these three proteins in E.coli and Arabidopsis thaliana were detected by using SDS-PAGE,Northern blot and subcellular localization methods. [Result] The results showed that the molecular weights of the three proteins were 17.5,17.0 and 27.0 kD respectively,and the expression levels of the proteins in Arabidopsis thaliana were At5G23420At5G23405At2G33450. In addition,all the three proteins were located in nucleus. [Conclusion] The study will provide a basis for the further research on the biological function of HMGB proteins in higher plants.展开更多
目的对比吸烟者和未吸烟者的牙龈上皮细胞凋亡的情况不同,评价吸烟对牙龈上皮细胞凋亡的影响并探讨其可能机制。方法选择21例行冠延长术的男性患者,年龄为30~45岁,无相关系统疾病和明显的牙龈疾病。无吸烟史10人作对照,切取的牙龈...目的对比吸烟者和未吸烟者的牙龈上皮细胞凋亡的情况不同,评价吸烟对牙龈上皮细胞凋亡的影响并探讨其可能机制。方法选择21例行冠延长术的男性患者,年龄为30~45岁,无相关系统疾病和明显的牙龈疾病。无吸烟史10人作对照,切取的牙龈上皮经新鲜配置4%多聚甲醛固定、脱水、石蜡包埋,TUNEL(TdT.mediated—dUTP nick end labeling,TUNEL)法原位细胞凋亡检测牙龈上皮的细胞凋亡情况。Newman—Keuls法计算各吸烟组与对照组及各吸烟组之间的差异,取α=0.05水准。SP免疫组化法对凋亡抑制基因Bcl-2的表达进行组织定位。结果各吸烟组与对照组都存在显著差异(P〈0.01);轻度吸烟组和重度吸烟组间也存在显著性差异(P〈0.01)。Bcl-2在吸烟者的牙龈上皮的表达较对照组减弱。结论吸烟促进牙龈上皮细胞凋亡的发生,干扰牙龈上皮的正常代谢。展开更多
文摘[Objective] The aim was to better research the function and action mode of High Mobility Group B (HMGB) proteins in higher plants. [Method] At2G33450,At5G23405 and At5G23420 genes of HMGB protein family in Arabidopsis thaliana were cloned by the use of RT-PCR method,and the expression of these three proteins in E.coli and Arabidopsis thaliana were detected by using SDS-PAGE,Northern blot and subcellular localization methods. [Result] The results showed that the molecular weights of the three proteins were 17.5,17.0 and 27.0 kD respectively,and the expression levels of the proteins in Arabidopsis thaliana were At5G23420At5G23405At2G33450. In addition,all the three proteins were located in nucleus. [Conclusion] The study will provide a basis for the further research on the biological function of HMGB proteins in higher plants.
文摘目的对比吸烟者和未吸烟者的牙龈上皮细胞凋亡的情况不同,评价吸烟对牙龈上皮细胞凋亡的影响并探讨其可能机制。方法选择21例行冠延长术的男性患者,年龄为30~45岁,无相关系统疾病和明显的牙龈疾病。无吸烟史10人作对照,切取的牙龈上皮经新鲜配置4%多聚甲醛固定、脱水、石蜡包埋,TUNEL(TdT.mediated—dUTP nick end labeling,TUNEL)法原位细胞凋亡检测牙龈上皮的细胞凋亡情况。Newman—Keuls法计算各吸烟组与对照组及各吸烟组之间的差异,取α=0.05水准。SP免疫组化法对凋亡抑制基因Bcl-2的表达进行组织定位。结果各吸烟组与对照组都存在显著差异(P〈0.01);轻度吸烟组和重度吸烟组间也存在显著性差异(P〈0.01)。Bcl-2在吸烟者的牙龈上皮的表达较对照组减弱。结论吸烟促进牙龈上皮细胞凋亡的发生,干扰牙龈上皮的正常代谢。