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基于量子衍生涡流算法和T⁃S模糊推理模型的储层岩性识别
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作者 赵娅 管玉 +1 位作者 李盼池 王伟 《石油地球物理勘探》 EI CSCD 北大核心 2024年第1期23-30,共8页
鉴于梯度下降法易陷入局部极值、普通群智能优化算法易早熟收敛,提出一种基于量子衍生涡流算法(Quantum Vortex Search Algorithm,QVSA)和T⁃S模糊推理模型的岩性识别方法,QVSA具有操作简单、收敛速度快、寻优能力强等优点,有助于T⁃S模... 鉴于梯度下降法易陷入局部极值、普通群智能优化算法易早熟收敛,提出一种基于量子衍生涡流算法(Quantum Vortex Search Algorithm,QVSA)和T⁃S模糊推理模型的岩性识别方法,QVSA具有操作简单、收敛速度快、寻优能力强等优点,有助于T⁃S模糊推理模型获得最优参数配置,从而实现储层岩性的准确识别。首先利用具有全局搜索能力的QVSA优化T⁃S模糊推理模型的各种参数;然后利用主成分分析方法降低获取的地震属性维度;再利用优化的T⁃S模糊推理模型识别储层岩性。实验结果表明,利用反映储层特征的8个地震属性识别储层岩性时,所提方法的识别正确率达到92%,比普通BP网络方法高5.1%,同时查准率、查全率、F1分数等指标也较BP网络方法提升明显。 展开更多
关键词 储层岩性识别 量子衍生涡流算法 ts 模糊推理模型 模糊集 地震属性
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基于T-S模糊故障树的驱动电机冷却系统可靠性分析
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作者 柳炽伟 郭美华 《客车技术与研究》 2024年第2期19-25,共7页
车用驱动电机液压冷却系统存在故障机理不确定等问题。本文应用模糊数描述其故障概率和故障程度,建立驱动电机冷却系统的T-S模糊故障树模型,计算系统模糊可能性,分析各部件的概率重要度和关键重要度,找出影响系统可靠性的关键部件。
关键词 电动汽车 驱动电机 冷却系统 t-s模糊故障树 可靠性分析
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靶向蛋白S-棕榈酰化修饰在T细胞免疫疗法中的研究进展
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作者 孙丽婷 张为国 童玥 《中国药科大学学报》 CAS CSCD 北大核心 2024年第1期45-52,共8页
S-棕榈酰化是细胞内一种可逆且动态的蛋白质翻译后修饰,参与调控下游靶基因转录、表达以及信号转导,进而影响细胞生命活动。研究发现数千种人类蛋白质经历S-棕榈酰化修饰,表明S-棕榈酰化与疾病发生发展以及治疗之间存在很大程度的关联性... S-棕榈酰化是细胞内一种可逆且动态的蛋白质翻译后修饰,参与调控下游靶基因转录、表达以及信号转导,进而影响细胞生命活动。研究发现数千种人类蛋白质经历S-棕榈酰化修饰,表明S-棕榈酰化与疾病发生发展以及治疗之间存在很大程度的关联性。T细胞是机体抗肿瘤免疫的主力军,多种T细胞免疫相关蛋白受S-棕榈酰化调节。本文围绕S-棕榈酰化对T细胞信号转导的影响及在T细胞免疫疗法中的应用展开论述,为T细胞免疫治疗新靶点及多肽抑制剂的开发提供新思路。 展开更多
关键词 s-棕榈酰化 DHHC t细胞 免疫疗法 肽抑制剂
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Milk fat globule membrane supplementation protects againstβ-lactoglobul-ininduced food allergy in mice via upregulation of regulatory T cells and enhancement of intestinal barrier in a microbiota-derived short-chain fatty acids manner 被引量:1
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作者 Han Gong Tiange Li +3 位作者 Dong Liang Jingxin Gao Xiaohan Liu Xueying Mao 《Food Science and Human Wellness》 SCIE CSCD 2024年第1期124-136,共13页
Milk fat globule membrane(MFGM),which contains abundant glycoproteins and phospholipids,exerts beneficial effects on intestinal health and immunomodulation.The aim of this study was to evaluate the protective effects ... Milk fat globule membrane(MFGM),which contains abundant glycoproteins and phospholipids,exerts beneficial effects on intestinal health and immunomodulation.The aim of this study was to evaluate the protective effects and possible underlying mechanisms of MFGM on cow’s milk allergy(CMA)in aβ-lactoglobulin(BLG)-induced allergic mice model.MFGM was supplemented to allergic mice induced by BLG at a dose of 400 mg/kg body weight.Results demonstrated that MFGM alleviated food allergy symptoms,decreased serum levels of lipopolysaccharide,pro-inflammatory cytokines,immunoglobulin(Ig)E,Ig G1,and Th2 cytokines including interleukin(IL)-4,while increased serum levels of Th1 cytokines including interferon-γand regulatory T cells(Tregs)cytokines including IL-10 and transforming growth factor-β.MFGM modulated gut microbiota and enhanced intestinal barrier of BLG-allergic mice,as evidenced by decreased relative abundance of Desulfobacterota,Rikenellaceae,Lachnospiraceae,and Desulfovibrionaceae,while increased relative abundance of Bacteroidetes,Lactobacillaceae and Muribaculaceae,and enhanced expressions of tight junction proteins including Occludin,Claudin-1 and zonula occludens-1.Furthermore,MFGM increased fecal short-chain fatty acids(SCFAs)levels,which elevated G protein-coupled receptor(GPR)43 and GPR109A expressions.The increased expressions of GPR43 and GPR109A induced CD103+dendritic cells accumulation and promoted Tregs differentiation in mesenteric lymph node to a certain extent.In summary,MFGM alleviated CMA in a BLG-induced allergic mice model through enhancing intestinal barrier and promoting Tregs differentiation,which may be correlated with SCFAs-mediated activation of GPRs.These findings suggest that MFGM may be useful as a promising functional ingredient against CMA. 展开更多
关键词 Cow’s milk allergy Milk fat globule membrane Gut microbiota short-chain fatty acid G protein-coupled receptor Regulatory t cell
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Correlative factors of poor prognosis and abnormal cellular immune function in patients with Alzheimer’s disease
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作者 Hua Bai Hong-Mei Zeng +2 位作者 Qi-Fang Zhang Yue-Zhi Hu Fei-Fei Deng 《World Journal of Clinical Cases》 SCIE 2024年第6期1063-1075,共13页
BACKGROUND Alzheimer’s disease(AD)is a serious disease causing human dementia and social problems.The quality of life and prognosis of AD patients have attracted much attention.The role of chronic immune inflammation... BACKGROUND Alzheimer’s disease(AD)is a serious disease causing human dementia and social problems.The quality of life and prognosis of AD patients have attracted much attention.The role of chronic immune inflammation in the pathogenesis of AD is becoming more and more important.AIM To study the relationship among cognitive dysfunction,abnormal cellular immune function,neuroimaging results and poor prognostic factors in patients.METHODS A retrospective analysis of 62 hospitalized patients clinical diagnosed with AD who were admitted to our hospital from November 2015 to November 2020.Collect cognitive dysfunction performance characteristics,laboratory test data and neuroimaging data from medical records within 24 h of admission,including Mini Mental State Examination Scale score,drawing clock test,blood T lymphocyte subsets,and neutrophils and lymphocyte ratio(NLR),disturbance of consciousness,extrapyramidal symptoms,electroencephalogram(EEG)and head nucleus magnetic spectroscopy(MRS)and other data.Multivariate logistic regression analysis was used to determine independent prog-nostic factors.the modified Rankin scale(mRS)was used to determine whether the prognosis was good.The correlation between drug treatment and prognostic mRS score was tested by the rank sum test.RESULTS Univariate analysis showed that abnormal cellular immune function,extrapyramidal symptoms,obvious disturbance of consciousness,abnormal EEG,increased NLR,abnormal MRS,and complicated pneumonia were related to the poor prognosis of AD patients.Multivariate logistic regression analysis showed that the decrease in the proportion of T lym-phocytes in the blood after abnormal cellular immune function(odd ratio:2.078,95%confidence interval:1.156-3.986,P<0.05)was an independent risk factor for predicting the poor prognosis of AD.The number of days of donepezil treatment to improve cognitive function was negatively correlated with mRS score(r=0.578,P<0.05).CONCLUSION The decrease in the proportion of T lymphocytes may have predictive value for the poor prognosis of AD.It is recommended that the proportion of T lymphocytes<55%is used as the cut-off threshold for predicting the poor prog-nosis of AD.The early and continuous drug treatment is associated with a good prognosis. 展开更多
关键词 Alzheimer’s disease Cellular immunity PROGNOsIs t lymphocytes Magnetic resonance spectroscopy
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T-S模糊系统的自触发有限时间H∞控制
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作者 刘晓迪 《计算机测量与控制》 2024年第4期120-128,共9页
为克服事件触发控制对硬件设备的依赖以及控制策略频繁更新的局限,针对一类不确定Takagi-Sugeno(T-S)模糊系统的有限时间H∞控制问题,引入自触发机制,提出一种基于此机制下只与触发时刻状态有关的模糊控制器设计方法;基于自触发机制并... 为克服事件触发控制对硬件设备的依赖以及控制策略频繁更新的局限,针对一类不确定Takagi-Sugeno(T-S)模糊系统的有限时间H∞控制问题,引入自触发机制,提出一种基于此机制下只与触发时刻状态有关的模糊控制器设计方法;基于自触发机制并结合有限时间控制的思想,通过设计触发间隔函数、推导并求解线性矩阵不等式(LMI),使得系统在保障稳定性的前提下,系统运动轨迹不会超过一定的界限,并达到所期望H∞性能水平;同时相较于事件触发机制,自触发机制位于系统内部,无需额外硬件设备接收触发信号且只需利用当前的触发状态信息来预测下一触发时刻,在一定程度上进一步降低系统资源成本;此外,利用李亚普诺夫函数对系统稳定性进行了严格分析,并提供一个确保能够防止芝诺现象发生的证明;最后,通过数值仿真、单连杆刚性机器人系统实例仿真两个实验说明所提方法的有效性。 展开更多
关键词 有限时间有界 自触发控制 鲁棒H∞控制 t-s模糊系统 模糊推理
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“作为思想家的诗人”——评蒋洪新教授《T.S.艾略特文学思想研究》
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作者 肖百容 黄苏 《湘南学院学报》 2024年第1期124-125,共2页
T.S.艾略特(T.S. Eliot,1888—1965)是20世纪英美现代主义诗歌的开拓者、著名的批评家、戏剧家、现代派诗歌运动的领袖,他对英美文学和文化批评产生了划时代的深远影响。蒋洪新教授深耕艾略特研究近三十年,完成了“诗学理论—文化批评... T.S.艾略特(T.S. Eliot,1888—1965)是20世纪英美现代主义诗歌的开拓者、著名的批评家、戏剧家、现代派诗歌运动的领袖,他对英美文学和文化批评产生了划时代的深远影响。蒋洪新教授深耕艾略特研究近三十年,完成了“诗学理论—文化批评—文学思想”渐次深入的艾略特研究三部曲,他创作的《T.S.艾略特文学思想研究》(以下简称为《研究》)无疑为国内艾略特研究做出了开创性的贡献。一、“文学思想”建构的创新性1948年,艾略特凭借《四个四重奏》获得诺贝尔文学奖,诺贝尔奖评委会给予他的颁奖词为:“在艾略特的诗歌和散文中有一种很特殊的声音,这种声音使我们这个时代不得不加以重视,这是一种钻石般的锋利切入我们这代人的意识的能力。” 展开更多
关键词 t.s.艾略特 《四个四重奏》 现代派诗歌 文学思想 英美文学 诗学理论 诺贝尔文学奖 我们这代人
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基于T-S模糊神经网络的光伏发电机组自动控制
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作者 杨振睿 沈主浮 +2 位作者 孙辰 蔡斌 姜宽 《机械与电子》 2024年第2期35-39,共5页
光照情况变化会使光伏发电机组功率呈现不稳定性,加大光伏发电机组控制难度,为此,设计了基于T-S模糊神经网络的光伏发电机组自动控制方法。构建光伏阵列数学模型,分析在均匀和不均匀2种光照情况下光伏发电机组特性曲线。以分析结果为依... 光照情况变化会使光伏发电机组功率呈现不稳定性,加大光伏发电机组控制难度,为此,设计了基于T-S模糊神经网络的光伏发电机组自动控制方法。构建光伏阵列数学模型,分析在均匀和不均匀2种光照情况下光伏发电机组特性曲线。以分析结果为依据,采用T-S模糊神经网络构建光伏发电机组自动控制模型。为保证良好的控制效果,引入定比因子优化隶属度函数,输出最佳跟踪结果,结合最佳跟踪结果和自动控制模型实现光伏发电机组自动控制。测试结果显示,该方法能够完成光伏阵列特性分析,控制效果好。 展开更多
关键词 t-s模糊神经网络 光伏发电机组 自动控制 特性曲线 最大功率点 光照情况
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H.I.N.T.S检查法联合ABCD2评分对急性中枢性头晕、眩晕的诊断价值
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作者 冯慧敏 芦婷 +2 位作者 李刚 吕囡囡 任大鹏 《中文科技期刊数据库(引文版)医药卫生》 2024年第4期0045-0049,共5页
探讨H.I.N.T.S检查法联合ABCD2评分对急性中枢性头晕/眩晕的诊断价值。方法 选取2022年6月至2023年8月就诊于我院急诊的急性头晕/眩晕患者127例作为研究对象,分别并对其进行H.I.N.T.S检查、ABCD2评分及颅脑影像学检查,对比分析H.I.N.T.... 探讨H.I.N.T.S检查法联合ABCD2评分对急性中枢性头晕/眩晕的诊断价值。方法 选取2022年6月至2023年8月就诊于我院急诊的急性头晕/眩晕患者127例作为研究对象,分别并对其进行H.I.N.T.S检查、ABCD2评分及颅脑影像学检查,对比分析H.I.N.T.S检查法、ABCD2评分以及H.I.N.T.S检查法联合ABCD2评分对急性中枢性头晕/眩晕的诊断效能。结果 H.I.N.T.S检查法联合ABCD2评分的准确率为96.06%,敏感度为91.18%,特异度为97.85%,阳性拟然比为42.39,阴性拟然比为0.09。结论 H.I.N.T.S检查法联合ABCD2评分能有效预测急性中枢性头晕/眩晕,诊断价值较高。 展开更多
关键词 H.I.N.t.s检查法 ABCD2评分 急性中枢性头晕/眩晕
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Decoupling U.S.Economy from China Doomed to Fail
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作者 HE WEIWEN 《China Today》 2023年第6期44-45,共2页
The global supply chain is based on the global distribution of materials,technology,capital,labor,and markets and thus cannot be altered by political motives.KEEPING a sound and stable global supply chain will benefit... The global supply chain is based on the global distribution of materials,technology,capital,labor,and markets and thus cannot be altered by political motives.KEEPING a sound and stable global supply chain will benefit not only China and America,but also the world at large.Janet Yellen,U.S.secretary of treasury,has realized the devastating consequences of decoupling U.S.economy from Chinese economy when she spoke at John Hopkins Institute on April 20,2023.Yellen said,“The United States will assert ourselves when our vital interests are at stake.But we do not seek to decouple our economy from China’s.A full separation of our economies would be disastrous for both countries.It would be destabilizing for the rest of the world.” 展开更多
关键词 U.s. consequences economy
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基于Python和S-T的课堂教学分析——以高中信息技术课堂为例
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作者 王瑰霞 刘兴红 +2 位作者 张苏薇 李逸雪 覃守垣 《现代信息科技》 2024年第9期173-178,共6页
随着科技的飞速发展和教育信息化的全面普及,如何对高中信息技术课堂教学过程进行有效研究和分析,让其进一步完善是一个很重要的问题。文章选取高中信息技术两门相同理论课和两门相同实操课进行“同课异构”分析,通过反复观看课堂教学视... 随着科技的飞速发展和教育信息化的全面普及,如何对高中信息技术课堂教学过程进行有效研究和分析,让其进一步完善是一个很重要的问题。文章选取高中信息技术两门相同理论课和两门相同实操课进行“同课异构”分析,通过反复观看课堂教学视频,并运用Python和S-T分析法分析其课堂教学模式以及教学中存在的问题,最后针对理论性课程和操作类课程分别给出相关改进建议,为信息技术教师提升课堂教学效率和自我发展提供参考和建议,促进信息化教育课堂的发展。 展开更多
关键词 高中信息技术 s-t分析法 PYtHON 课堂教学分析
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Perspective of World Economy and China's External Economic Environment
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作者 Tao Jian Chen Fengying Zhao Hongtu Zhang Yuncheng Jiang Yong Liang Jianwu Ni Jianjun Li Hongyan 《Contemporary International Relations》 2003年第12期31-63,共33页
Owing to a series of impacts of the "9·11 terrorist attack," the accounting scandals of big companies, Iraq War and the SARS crisis in the past two years, the world economy that might have rebounded for... Owing to a series of impacts of the "9·11 terrorist attack," the accounting scandals of big companies, Iraq War and the SARS crisis in the past two years, the world economy that might have rebounded forcefully has been on a wavering process of slow recovery. 展开更多
关键词 of As for Perspective of World economy and China’s External Economic Environment that been tHAN World into HAVE WILL
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分布式驱动电动汽车主动悬架T–S模糊控制研究 被引量:1
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作者 李韶华 张培强 +1 位作者 冯桂珍 韩翔宇 《力学与实践》 北大核心 2023年第1期22-32,共11页
分布式驱动电动汽车,由于簧下质量增大,导致车轮振动加剧,进而影响车辆平顺性及行驶安全性。为有效抑制分布式驱动电动汽车垂向振动恶化,设计了一种主动悬架T-S模糊控制器,构建了分布式驱动电动汽车1/4悬架动力学模型,基于Matlab/Simul... 分布式驱动电动汽车,由于簧下质量增大,导致车轮振动加剧,进而影响车辆平顺性及行驶安全性。为有效抑制分布式驱动电动汽车垂向振动恶化,设计了一种主动悬架T-S模糊控制器,构建了分布式驱动电动汽车1/4悬架动力学模型,基于Matlab/Simulink在B级随机路面及变路面工况下进行动力学仿真,考虑了控制器在车辆参数不确定时的自适应性,探究了T-S模糊控制器在车辆变参数条件下的控制效果,并与PID控制的主动悬架及传统的被动悬架进行比较,通过硬件在环实验验证了控制效果。结果表明,所提出的分布式驱动电动汽车主动悬架T-S模糊控制策略可有效提升车辆的平顺性指标,相对于PID控制及被动悬架,T-S模糊控制也具有更好的多工况自适应能力。 展开更多
关键词 主动悬架 ts模糊控制 轮毂电机 工况自适应
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How China's young economists see the country's economy
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作者 金碚 李钢 梁泳梅 《China Economist》 2009年第5期106-112,共7页
The Institute of Industrial Economics at the Chinese Academy of Social Sciences and China Business Journal jointly conducted an online survey on the thinking and research of China’s young economists on the country’s... The Institute of Industrial Economics at the Chinese Academy of Social Sciences and China Business Journal jointly conducted an online survey on the thinking and research of China’s young economists on the country’s economic issues. The survey lasted from June 17 to June 26,2009. 展开更多
关键词 In rate How China’s young economists see the country’s economy WILL than
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China's Economy Approaching the World Economic Track
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作者 Liu Rixin Research-fellow of Economic Research Centre of State Planning Commission 《China's Foreign Trade》 1994年第6期3-5,共3页
The year 1993 was the fifteenth of China’s reform and opening to the outside. Its economy sustained double digit growth for two years running. Last year, domestic GNP was RMB3,138 billion, a 13.4 percent increase com... The year 1993 was the fifteenth of China’s reform and opening to the outside. Its economy sustained double digit growth for two years running. Last year, domestic GNP was RMB3,138 billion, a 13.4 percent increase compared with the previous year’s 13.2 percent. 展开更多
关键词 World China’s economy Approaching the World Economic track will GNP
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Special Economic Zones——New growth points in China's economy
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作者 Sun ZhijieSEZ Office of the State Council 《China's Foreign Trade》 1996年第11期10-11,共2页
It was approved by the State Council in1984 to establish economic andtechnological development zones in 14coastal port cities to function as windows forthose cities to attract foreign investment,introduce advanced tec... It was approved by the State Council in1984 to establish economic andtechnological development zones in 14coastal port cities to function as windows forthose cities to attract foreign investment,introduce advanced technology andmanagement methods and expand the export-oriented economy. Since 1992, 18 otherdevelopment zones have been approved bythe Council, increasing the number of suchzones to 32. 展开更多
关键词 Us New growth points in China’s economy special Economic Zones
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Coordinated development of Yunnan's frontier culture and economy under the regional economic integration pattern
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作者 WAN Yu-ying 《Ecological Economy》 2017年第2期165-171,共7页
This paper constructs the index system by means of quantitative analysis. We choose the coordination degree of Yunnan province from 2012 to 2015. The regional cultural and economic development in Yunnan's frontier... This paper constructs the index system by means of quantitative analysis. We choose the coordination degree of Yunnan province from 2012 to 2015. The regional cultural and economic development in Yunnan's frontier are analyzed so that we can provide the reference for the sustainable development of Yunnan's frontier and realize the coordinated development of culture in Yunnan's frontier and economic system in order. The results show that the culture and economy in Yunnan's frontier are coupled with formation of the coordinated development of culture and economy; economic development is the main reason to promote the coordinated development of culture and economy in Yunnan's frontier, and it contributes to the main force of improving the coordinated development of evolution types; the coordinated development degree of the overall level is low and still in the China's backward level. 展开更多
关键词 regional economic integration culture and economy coordinated development Yunnan’s frontier
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Policy Towards Gender Equality in Employment in a Globalizing Economy——An outline of the analysis report on the impacts of China's economic reform on women employment 被引量:1
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作者 Li Huijing 《浙江经济》 1995年第3期6-9,共4页
1.This study is one of The Applied Economic Institutes Linkages Project(AERIL)which is funded by theCanadian International Development Agency(CIDA)and jiontly managed by The Conference Board of Canada(CBOC)and the Int... 1.This study is one of The Applied Economic Institutes Linkages Project(AERIL)which is funded by theCanadian International Development Agency(CIDA)and jiontly managed by The Conference Board of Canada(CBOC)and the International Trade Research Institute in China.It is jointly implemented by the Institute ofEconomic Research of the Chinese State Planning Commission and the North—South Institute of Canada。 展开更多
关键词 An outline of the analysis report on the impacts of China’s economic reform on women employment Policy towards Gender Equality in Employment in a Globalizing economy
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基于T-S模糊模型的桥吊系统积分状态反馈控制 被引量:1
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作者 邵雪卷 张井岗 +1 位作者 刘丽琴 陈志梅 《实验技术与管理》 CAS 北大核心 2023年第3期113-118,124,共7页
小车定位精度和负载摆角大小是桥式起重机控制系统的两个重要性能指标。采用状态反馈控制时小车位移会存在稳态误差,为了消除稳态误差,提高系统的定位精度,给出基于T-S模糊模型的积分状态反馈控制方法。在桥式起重机非线性动力学模型基... 小车定位精度和负载摆角大小是桥式起重机控制系统的两个重要性能指标。采用状态反馈控制时小车位移会存在稳态误差,为了消除稳态误差,提高系统的定位精度,给出基于T-S模糊模型的积分状态反馈控制方法。在桥式起重机非线性动力学模型基础上,建立增维T-S模糊模型,基于所建模型设计并行结构的积分状态反馈控制器,通过线性矩阵不等式计算反馈增益矩阵,并对闭环系统的稳定性进行分析。实验结果表明积分状态反馈控制不仅可以提高系统的定位精度,减少定位时间,而且有较好的抗干扰能力。 展开更多
关键词 稳态误差 增维t-s模糊模型 积分状态反馈控制
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Th1/Th2、CD28、ICOS、PD-1和CTLA-4在桥本甲状腺炎患者外周血中的表达及与甲状腺相关实验室指标的相关性 被引量:4
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作者 罗百文 李茂城 杨丽梅 《检验医学与临床》 CAS 2023年第5期589-593,共5页
目的探讨辅助性T淋巴细胞1与辅助性T淋巴细胞2比值(Th1/Th2)、CD28、可诱导共刺激分子(ICOS)、程序性死亡受体1(PD-1)和细胞毒性T淋巴细胞相关抗原4(CTLA-4)在桥本甲状腺炎(HT)患者外周血中的表达及与甲状腺相关实验室指标的相关性。方... 目的探讨辅助性T淋巴细胞1与辅助性T淋巴细胞2比值(Th1/Th2)、CD28、可诱导共刺激分子(ICOS)、程序性死亡受体1(PD-1)和细胞毒性T淋巴细胞相关抗原4(CTLA-4)在桥本甲状腺炎(HT)患者外周血中的表达及与甲状腺相关实验室指标的相关性。方法收集2021年在该院门诊或住院治疗的HT患者40例为HT组,另选择同期健康体检者40例为对照组。采用全自动化学发光免疫分析仪检测血清甲状腺过氧化物酶抗体(TPOAb)、促甲状腺激素(TSH)、游离甲状腺素(FT4)、游离三碘甲状腺原氨酸(FT3)水平,采用酶联免疫吸附试验检测血清γ干扰素(IFN-γ)、白细胞介素(IL)-2、IL-4和IL-10水平,采用流式细胞仪检测外周血中Th1与Th2细胞,以及CD3^(+)CD4^(+)T淋巴细胞表面共信号分子CD28、ICOS、PD-1、CTLA-4水平。结果HT组血清FT4和TPOAb水平均明显高于对照组,TSH、FT3水平明显低于对照组,差异有统计学意义(P<0.05)。HT组外周血中Th1细胞及其相关细胞因子IFN-γ和IL-2水平,以及Th1/Th2明显高于对照组,差异有统计学意义(P<0.05)。HT组外周血CD3^(+)CD4^(+)T淋巴细胞表面CD28、ICOS和PD-1水平明显高于对照组,差异有统计学意义(P<0.05);两组CTLA-4水平比较,差异无统计学意义(P>0.05)。FT4水平与Th1细胞、Th1/Th2水平呈正相关(P<0.05);TSH水平与Th1细胞、Th1/Th2和IL-2水平呈负相关(P<0.05);TPOAb水平与Th1细胞、Th1/Th2、IFN-γ、IL-2、CD28及ICOS水平呈正相关(P<0.05)。结论HT患者外周血中Th1细胞及其相关细胞因子IFN-γ和IL-2水平较健康体检者均明显上调,其CD3^(+)CD4^(+)T淋巴细胞表面CD28、ICOS和PD-1的表达也均明显上调。Th1细胞及其相关细胞因子,以及CD28、ICOS和PD-1可能在HT的发病机制中发挥了重要作用。 展开更多
关键词 桥本甲状腺炎 辅助性t淋巴细胞 CD28 可诱导共刺激分子 程序性死亡受体1 细胞毒性t淋巴细胞相关抗原4
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