目的:研究祛瘀护膜法对反流性食管炎(RE)大鼠食管TGF-β/Smad通路及E-钙黏蛋白(E-Cadherin)表达的影响。方法:使用“4.2 mm幽门夹+2/3胃底结扎术”建立RE大鼠模型56只,造模成功后,随机分为西药组1、西药组2、治疗组、优化组、祛瘀护膜...目的:研究祛瘀护膜法对反流性食管炎(RE)大鼠食管TGF-β/Smad通路及E-钙黏蛋白(E-Cadherin)表达的影响。方法:使用“4.2 mm幽门夹+2/3胃底结扎术”建立RE大鼠模型56只,造模成功后,随机分为西药组1、西药组2、治疗组、优化组、祛瘀护膜剂组、加味祛瘀护膜剂组,每组8只,另设空白组8只。连续给药14 d,第15天采血后处死大鼠并取出食管组织。采用HE染色光镜下观察食管组织病理变化;透射电镜观察食管上皮细胞间隙;ELISA法检测转化生长因子-β1(TGF-β1)、肿瘤坏死因子-α(TNF-α)水平;RT-PCR法检测Snail m RNA、Slug m RNA、Twist m RNA、E-Cadherin m RNA表达水平;Western blotting检测TGF-β1、Snail、Slug、Twist、NLRP3、Smad2/3、p-Smad2/3蛋白表达水平;免疫组织化学染色测定TGF-β1、E-Cadherin、NLRP3表达。结果:祛瘀护膜法治疗的RE大鼠一般情况好转,体质量增加;食管黏膜损伤改善;上皮细胞间隙呈缩小趋势;食管组织中TGF-β1、Snail、Slug、Twist、NLRP3蛋白表达及Smad2/3磷酸化占比低于模型组(P<0.05),E-Cadherin蛋白及E-Cadherin m RNA表达高于模型组(P<0.05);血清中TNF-α、TGF-β1低于模型组(P<0.05)。结论:祛瘀护膜法可能通过抑制TGF-β/Smad信号通路,干预该通路介导的E-cadherin表达,促进食管炎黏膜修复,拮抗RE大鼠食管黏膜炎症。展开更多
Leading national space exploration agencies and private enterprises are actively engaged in lunar exploration initiatives to accomplish manned lunar landings and establish permanent lunar bases in the forthcoming year...Leading national space exploration agencies and private enterprises are actively engaged in lunar exploration initiatives to accomplish manned lunar landings and establish permanent lunar bases in the forthcoming years.With limited access to lunar surface materials on Earth,lunar regolith simulants are crucial for lunar exploration research.The Chang’e-5(CE-5)samples have been characterized by state-of-the-art laboratory equipment,providing a unique opportunity to develop a high-quality lunar regolith simulant.We have prepared a high-fidelity PolyU-1 simulant by pulverizing,desiccating,sieving,and blending natural mineral materials on Earth based on key physical,mineral,and chemical characteristics of CE-5 samples.The results showed that the simulant has a high degree of consistency with the CE-5 samples in terms of the particle morphology,mineral and chemical composition.Direct shear tests were conducted on the simulant,and the measured internal friction angle and cohesion values can serve as references for determining the mechanical properties of CE-5 lunar regolith.The PolyU-1 simulant can contribute to experimental studies involving lunar regolith,including the assessment of interaction between rovers and lunar regolith,as well as the development of in-situ resource utilization(ISRU)technologies.展开更多
文摘目的:研究祛瘀护膜法对反流性食管炎(RE)大鼠食管TGF-β/Smad通路及E-钙黏蛋白(E-Cadherin)表达的影响。方法:使用“4.2 mm幽门夹+2/3胃底结扎术”建立RE大鼠模型56只,造模成功后,随机分为西药组1、西药组2、治疗组、优化组、祛瘀护膜剂组、加味祛瘀护膜剂组,每组8只,另设空白组8只。连续给药14 d,第15天采血后处死大鼠并取出食管组织。采用HE染色光镜下观察食管组织病理变化;透射电镜观察食管上皮细胞间隙;ELISA法检测转化生长因子-β1(TGF-β1)、肿瘤坏死因子-α(TNF-α)水平;RT-PCR法检测Snail m RNA、Slug m RNA、Twist m RNA、E-Cadherin m RNA表达水平;Western blotting检测TGF-β1、Snail、Slug、Twist、NLRP3、Smad2/3、p-Smad2/3蛋白表达水平;免疫组织化学染色测定TGF-β1、E-Cadherin、NLRP3表达。结果:祛瘀护膜法治疗的RE大鼠一般情况好转,体质量增加;食管黏膜损伤改善;上皮细胞间隙呈缩小趋势;食管组织中TGF-β1、Snail、Slug、Twist、NLRP3蛋白表达及Smad2/3磷酸化占比低于模型组(P<0.05),E-Cadherin蛋白及E-Cadherin m RNA表达高于模型组(P<0.05);血清中TNF-α、TGF-β1低于模型组(P<0.05)。结论:祛瘀护膜法可能通过抑制TGF-β/Smad信号通路,干预该通路介导的E-cadherin表达,促进食管炎黏膜修复,拮抗RE大鼠食管黏膜炎症。
基金supported by the PolyU RCDSE projects(Nos.P0049221 and P0041304)We would like to express our sincere gratitude to Prof.Feng Li and Dr.Siqi Zhou from Beihang University for providing us with the BH-1 simulant,which served as the crucial reference for the PolyU-1 simulant.We would like to thank the support from the National Natural Science Foundation of China(No.42241103)the Key Research Program of the Institute of Geology and Geophysics,Chinese Academy of Sciences(No.IGGCAS-202101)。
文摘Leading national space exploration agencies and private enterprises are actively engaged in lunar exploration initiatives to accomplish manned lunar landings and establish permanent lunar bases in the forthcoming years.With limited access to lunar surface materials on Earth,lunar regolith simulants are crucial for lunar exploration research.The Chang’e-5(CE-5)samples have been characterized by state-of-the-art laboratory equipment,providing a unique opportunity to develop a high-quality lunar regolith simulant.We have prepared a high-fidelity PolyU-1 simulant by pulverizing,desiccating,sieving,and blending natural mineral materials on Earth based on key physical,mineral,and chemical characteristics of CE-5 samples.The results showed that the simulant has a high degree of consistency with the CE-5 samples in terms of the particle morphology,mineral and chemical composition.Direct shear tests were conducted on the simulant,and the measured internal friction angle and cohesion values can serve as references for determining the mechanical properties of CE-5 lunar regolith.The PolyU-1 simulant can contribute to experimental studies involving lunar regolith,including the assessment of interaction between rovers and lunar regolith,as well as the development of in-situ resource utilization(ISRU)technologies.
