目的:尘螨过敏原Der p 7新的IgE抗原表位鉴定及尘螨交叉反应性的研究。方法:ELISA检测华东地区安徽省合肥市的尘螨过敏患者与尘螨过敏临床相关性较高的重组蛋白Der p 7的IgE结合率;通过ELISA和Dot Blot鉴定屋尘螨过敏原Der p 7的新IgE...目的:尘螨过敏原Der p 7新的IgE抗原表位鉴定及尘螨交叉反应性的研究。方法:ELISA检测华东地区安徽省合肥市的尘螨过敏患者与尘螨过敏临床相关性较高的重组蛋白Der p 7的IgE结合率;通过ELISA和Dot Blot鉴定屋尘螨过敏原Der p 7的新IgE抗原表位;利用圆二色光谱法检测Der p 7和其突变体的结构及热稳定性;最后用ELISA和ELISA抑制实验鉴定尘螨新的交叉过敏物质。结果:通过ELISA实验检测发现,华东地区的合肥市内尘螨过敏患者体内IgE与Der p 7的结合率为36.2%,与华南地区的广州市(37.4%)和西班牙(34.7%)相近。然而,这一结合率受到地理区域、自然环境和生活方式等多种因素的影响,与华北地区的北京市(19.3%)、乌克兰(22.67%)、意大利(28%)相比明显较低,而与非洲(56%)和日本(超过60%)相比则显著不同。ELISA和Dot Blot鉴定出尘螨重要过敏原Der p 7的两个新IgE抗原结合表位,分别是第36位天冬氨酸和第100位天冬氨酸。用圆二色光谱实验证明了Der p 7的结构稳定性,且突变后结构未发生改变,并检测了其热稳定性特征。最后用ELISA和ELISA抑制实验新发现了两种与尘螨存在交叉过敏的物质(小麦和花生)。结论:基于尘螨过敏原Der p 7与华东地区安徽省合肥市内过敏患者IgE的结合率及新的IgE抗原表位的研究为预防、诊断、治疗过敏性疾病提供理论基础,对开发尘螨过敏原低敏疫苗具有参考价值。发现新的尘螨交叉过敏物质为交叉过敏反应的预防、治疗提供了科学依据。展开更多
目的探讨小鼠心肌梗死进程中巨噬细胞亚群的动态变化与CD59、P2X7表达的动态变化。方法将成年雄性C57BL/6J小鼠36只随机分为对照组(不做任何处理,6只)和心肌梗死组(30只)。通过冠状动脉左前降支结扎建立小鼠急性心肌梗死模型,心肌梗死...目的探讨小鼠心肌梗死进程中巨噬细胞亚群的动态变化与CD59、P2X7表达的动态变化。方法将成年雄性C57BL/6J小鼠36只随机分为对照组(不做任何处理,6只)和心肌梗死组(30只)。通过冠状动脉左前降支结扎建立小鼠急性心肌梗死模型,心肌梗死组30只小鼠又随机分为A、B、C、D、E组,分别在心肌梗死后1、3、5、7、14 d取材。收取小鼠的外周血和心脏组织,采用流式细胞术检测巨噬细胞亚群的动态变化与CD59和P2X7的表达情况。结果心肌梗死后1、3 d外周血中单核细胞数量均高于对照组[(9.5±1.7)、(10.3±3.7)×10^(4)/ml比(3.2±3.1)×10^(4)/ml](均P<0.05)。心肌梗死后1、3、5 d心脏组织白细胞计数、巨噬细胞计数均高于对照组(均P<0.05)。心脏组织中Ly6C^(high)巨噬细胞计数在心肌梗死后3 d达到高峰,而Ly6C^(low)亚群在心肌梗死后5 d达到高峰,均高于对照组(均P<0.05)。心肌梗死后1 d P2X7^(-)CD59^(-)巨噬细胞占Ly6C^(high)巨噬细胞百分比高于对照组,而P2X7^(+)CD59^(+)巨噬细胞占比低于对照组(均P<0.05)。心肌梗死后1、3、5 d P2X7^(+)CD59^(+)巨噬细胞占Ly6C^(low)巨噬细胞百分比均低于对照组,而P2X7^(-)CD59^(+)巨噬细胞占比均高于对照组(均P<0.05)。结论在小鼠急性心肌梗死的不同阶段,心脏组织巨噬细胞的亚群呈现动态变化,同时伴随CD59和P2X7表达的动态变化。展开更多
Traumatic brain injury is a severe health problem leading to autophagy and apoptosis in the brain.3,6-Dibromo-beta-fluoro-N-(3-methoxyphenyl)-9H-carbazole-9-propanamine(P7C3-A20)can be neuroprotective in various disea...Traumatic brain injury is a severe health problem leading to autophagy and apoptosis in the brain.3,6-Dibromo-beta-fluoro-N-(3-methoxyphenyl)-9H-carbazole-9-propanamine(P7C3-A20)can be neuroprotective in various diseases,including ischemic stroke and neurodegenerative diseases.However,whether P7C3-A20 has a therapeutic effect on traumatic brain injury and its possible molecular mechanisms are unclear.Therefore,in the present study,we investigated the therapeutic effects of P7C3-A20 on traumatic brain injury and explored the putative underlying molecular mechanisms.We established a traumatic brain injury rat model using a modified weight drop method.P7C3-A20 or vehicle was injected intraperitoneally after traumatic brain injury.Severe neurological deficits were found in rats after traumatic brain injury,with deterioration in balance,walking function,and learning memory.Furthermore,hematoxylin and eosin staining showed significant neuronal cell damage,while terminal deoxynucleotidyl transferase mediated dUTP nick end labeling staining indicated a high rate of apoptosis.The presence of autolysosomes was observed using transmission electron microscope.P7C3-A20 treatment reversed these pathological features.Western blotting showed that P7C3-A20 treatment reduced microtubule-associated protein 1 light chain 3-Ⅱ(LC3-Ⅱ)autophagy protein,apoptosis-related proteins(namely,Bcl-2/adenovirus E1B 19-kDa-interacting protein 3[BNIP3],and Bcl-2 associated x protein[Bax]),and elevated ubiquitin-binding protein p62(p62)autophagy protein expression.Thus,P7C3-A20 can treat traumatic brain injury in rats by inhibiting excessive autophagy and apoptosis.展开更多
文摘目的:尘螨过敏原Der p 7新的IgE抗原表位鉴定及尘螨交叉反应性的研究。方法:ELISA检测华东地区安徽省合肥市的尘螨过敏患者与尘螨过敏临床相关性较高的重组蛋白Der p 7的IgE结合率;通过ELISA和Dot Blot鉴定屋尘螨过敏原Der p 7的新IgE抗原表位;利用圆二色光谱法检测Der p 7和其突变体的结构及热稳定性;最后用ELISA和ELISA抑制实验鉴定尘螨新的交叉过敏物质。结果:通过ELISA实验检测发现,华东地区的合肥市内尘螨过敏患者体内IgE与Der p 7的结合率为36.2%,与华南地区的广州市(37.4%)和西班牙(34.7%)相近。然而,这一结合率受到地理区域、自然环境和生活方式等多种因素的影响,与华北地区的北京市(19.3%)、乌克兰(22.67%)、意大利(28%)相比明显较低,而与非洲(56%)和日本(超过60%)相比则显著不同。ELISA和Dot Blot鉴定出尘螨重要过敏原Der p 7的两个新IgE抗原结合表位,分别是第36位天冬氨酸和第100位天冬氨酸。用圆二色光谱实验证明了Der p 7的结构稳定性,且突变后结构未发生改变,并检测了其热稳定性特征。最后用ELISA和ELISA抑制实验新发现了两种与尘螨存在交叉过敏的物质(小麦和花生)。结论:基于尘螨过敏原Der p 7与华东地区安徽省合肥市内过敏患者IgE的结合率及新的IgE抗原表位的研究为预防、诊断、治疗过敏性疾病提供理论基础,对开发尘螨过敏原低敏疫苗具有参考价值。发现新的尘螨交叉过敏物质为交叉过敏反应的预防、治疗提供了科学依据。
文摘目的探讨小鼠心肌梗死进程中巨噬细胞亚群的动态变化与CD59、P2X7表达的动态变化。方法将成年雄性C57BL/6J小鼠36只随机分为对照组(不做任何处理,6只)和心肌梗死组(30只)。通过冠状动脉左前降支结扎建立小鼠急性心肌梗死模型,心肌梗死组30只小鼠又随机分为A、B、C、D、E组,分别在心肌梗死后1、3、5、7、14 d取材。收取小鼠的外周血和心脏组织,采用流式细胞术检测巨噬细胞亚群的动态变化与CD59和P2X7的表达情况。结果心肌梗死后1、3 d外周血中单核细胞数量均高于对照组[(9.5±1.7)、(10.3±3.7)×10^(4)/ml比(3.2±3.1)×10^(4)/ml](均P<0.05)。心肌梗死后1、3、5 d心脏组织白细胞计数、巨噬细胞计数均高于对照组(均P<0.05)。心脏组织中Ly6C^(high)巨噬细胞计数在心肌梗死后3 d达到高峰,而Ly6C^(low)亚群在心肌梗死后5 d达到高峰,均高于对照组(均P<0.05)。心肌梗死后1 d P2X7^(-)CD59^(-)巨噬细胞占Ly6C^(high)巨噬细胞百分比高于对照组,而P2X7^(+)CD59^(+)巨噬细胞占比低于对照组(均P<0.05)。心肌梗死后1、3、5 d P2X7^(+)CD59^(+)巨噬细胞占Ly6C^(low)巨噬细胞百分比均低于对照组,而P2X7^(-)CD59^(+)巨噬细胞占比均高于对照组(均P<0.05)。结论在小鼠急性心肌梗死的不同阶段,心脏组织巨噬细胞的亚群呈现动态变化,同时伴随CD59和P2X7表达的动态变化。
基金supported by National Natural Science Foundation of China,No.32102745(to XL).
文摘Traumatic brain injury is a severe health problem leading to autophagy and apoptosis in the brain.3,6-Dibromo-beta-fluoro-N-(3-methoxyphenyl)-9H-carbazole-9-propanamine(P7C3-A20)can be neuroprotective in various diseases,including ischemic stroke and neurodegenerative diseases.However,whether P7C3-A20 has a therapeutic effect on traumatic brain injury and its possible molecular mechanisms are unclear.Therefore,in the present study,we investigated the therapeutic effects of P7C3-A20 on traumatic brain injury and explored the putative underlying molecular mechanisms.We established a traumatic brain injury rat model using a modified weight drop method.P7C3-A20 or vehicle was injected intraperitoneally after traumatic brain injury.Severe neurological deficits were found in rats after traumatic brain injury,with deterioration in balance,walking function,and learning memory.Furthermore,hematoxylin and eosin staining showed significant neuronal cell damage,while terminal deoxynucleotidyl transferase mediated dUTP nick end labeling staining indicated a high rate of apoptosis.The presence of autolysosomes was observed using transmission electron microscope.P7C3-A20 treatment reversed these pathological features.Western blotting showed that P7C3-A20 treatment reduced microtubule-associated protein 1 light chain 3-Ⅱ(LC3-Ⅱ)autophagy protein,apoptosis-related proteins(namely,Bcl-2/adenovirus E1B 19-kDa-interacting protein 3[BNIP3],and Bcl-2 associated x protein[Bax]),and elevated ubiquitin-binding protein p62(p62)autophagy protein expression.Thus,P7C3-A20 can treat traumatic brain injury in rats by inhibiting excessive autophagy and apoptosis.
