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A Study on the Learning Progressions of Understanding the Core Concepts of Kinetic Energy in High School
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作者 xuemei cui Yue Zheng Yu Chen 《Journal of Contemporary Educational Research》 2024年第11期46-55,共10页
Learning progressions divide the logical system of a subject into ordered and continuously developing levels that are suitable for the cognitive development level of students,which plays an important role in understan... Learning progressions divide the logical system of a subject into ordered and continuously developing levels that are suitable for the cognitive development level of students,which plays an important role in understanding students’learning process.This paper focuses on the theme of“kinetic energy”in high school physics as the research object.Firstly,the concept map was used to represent the relationship between knowledge,and then five core concepts were selected based on the opinions of high school teachers.Secondly,the test tools were compiled and tested based on the relevant test questions.Finally,the paper analyzed the results based on the Rasch model,clarified students’cognitive development level of“kinetic energy”and constructed the learning progressions of“kinetic energy”based on the logical order of subject knowledge.The research provides theoretical and methodological support for the study of other subjects and learning progressions,and provides a valuable reference for high school teachers to effectively carry out the instruction of“kinetic energy.” 展开更多
关键词 Core concepts High school Kinetic energy Learning progressions
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小鼠多亚型热休克蛋白/肽疫苗联合PD-L1免疫检查点抑制剂的抗肿瘤实验研究 被引量:1
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作者 李浩江 王振勇 +9 位作者 沈师 高超 张彬 王泽昊 眭翔 崔雪梅 袁玫 刘舒云 郭全义 王桂琴 《中国肿瘤临床》 CAS CSCD 北大核心 2019年第6期278-283,共6页
目的:应用小鼠肉瘤组织制备混合多亚型热休克蛋白/肽疫苗(mHSP/P),联合程序性死亡配体(PD-L1)抑制剂治疗小鼠肉瘤。方法:免疫组织化学染色和Elisa蛋白定量鉴定肉瘤细胞MCA207中的热休克蛋白(HSP70、HSP90、Grp94)的表达。制备蛋白悬液,... 目的:应用小鼠肉瘤组织制备混合多亚型热休克蛋白/肽疫苗(mHSP/P),联合程序性死亡配体(PD-L1)抑制剂治疗小鼠肉瘤。方法:免疫组织化学染色和Elisa蛋白定量鉴定肉瘤细胞MCA207中的热休克蛋白(HSP70、HSP90、Grp94)的表达。制备蛋白悬液,通过蛋白层析技术获取mHSP/P和Grp94/肽肉瘤疫苗(Grp94/P),以Western blot(WB)鉴定。流式细胞术测定细胞毒性作用。Elisa实验测定mHSP/P和Grp94/P刺激产生的干扰素(IFN-γ)、肿瘤坏死因子(TNF-α)。小鼠实验探究肉瘤疫苗对肉瘤生长以及小鼠生存状况的影响。免疫荧光染色MCA207肉瘤细胞表面PD-L1的表达,WB测定IFN-γ对PD-L1表达的影响。动物实验探究PD-L1抑制剂联合mHSP/P对肿瘤的影响。结果:肿瘤组织携带多种亚型的HSP(HSP70、HSP90、Grp94);成功制备肉瘤组织来源的mHSP/P和Grp94/P,Western blot对肿瘤疫苗鉴定并且流式细胞学测定未发现细胞毒性;制备的mHSP/P较Grp94/P刺激产生更多的IFN-γ和TNF-α细胞因子(P<0.05)。肉瘤细胞表面PD-L1的表达随着IFN-γ的介入而增高;动物实验显示PD-L1抑制剂联合mHSP/P提高了免疫反应的抗肿瘤作用(P<0.05)。结论:肿瘤来源的mHSP/P和Grp94/P可以作为肿瘤疫苗在动物实验中使用。mHSP/P比Grp94/P能诱发更强的抗肿瘤免疫反应。IFN-γ刺激肉瘤细胞PD-L1的表达而导致免疫逃逸。PD-L1抑制剂联合mHSP/P提高了抗肿瘤作用。 展开更多
关键词 mHSP/P Grp94/P 层析 PD-L1免疫检查点抑制剂 IFN-γ IFN-α
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