目的:探讨治疗前淋巴细胞与C反应蛋白比值(LCR)对结外NK/T细胞淋巴瘤(ENKTL)预后的判断价值。方法:回顾性分析郑州大学第一附属医院收治的203例初诊为ENKTL患者的临床资料,ROC曲线得到LCR预测5 a总生存期(OS)的最佳截断值,并根据截断值...目的:探讨治疗前淋巴细胞与C反应蛋白比值(LCR)对结外NK/T细胞淋巴瘤(ENKTL)预后的判断价值。方法:回顾性分析郑州大学第一附属医院收治的203例初诊为ENKTL患者的临床资料,ROC曲线得到LCR预测5 a总生存期(OS)的最佳截断值,并根据截断值将患者分为两组,绘制Kaplan-Meier生存曲线,采用Cox回归分析无进展生存期(PFS)和OS的影响因素。结果:LCR预测5 a OS的最佳截断值为0.19,低LCR组患者预后较差(P<0.001)。Cox回归分析结果表明,低LCR组ENKTL患者预后较差,PFS和OS的HR(95%CI)分别为0.462(0.336~0.636)和0.381(0.275~0.527)。结论:治疗前LCR可影响ENKTL预后,低LCR患者的预后较差。展开更多
The effects of fibre/matrix bonding, fabric density, fibre volume fraction and bundle size on microstructure, mechanical properties and failure mechanisms in carbon fibre reinforced composites （plastic and carbon mat...The effects of fibre/matrix bonding, fabric density, fibre volume fraction and bundle size on microstructure, mechanical properties and failure mechanisms in carbon fibre reinforced composites （plastic and carbon matrix） have been investigated. The microstructure of unloaded and cracked samples was studied by optical microscopy and scanning electron microscopy （SEM）, respectively whereas the mechanical behaviour was examined by 3- point bending experiments. Exclusively one type of experimental resole type phenolic resin was applied. A strong fibre/matrix bonding, which is needed for high strength of carbon fibre reinforced plastic （CFRP） materials leads to severe composite damages during the pyrolysis resulting in low strength, brittle failure and a very low utilisation of the fibres strain to failure in C/C composites. Inherent fabric parameters such as an increasing fabric density or bundle size or a reduced fibre volume fraction introduce inhomogenities to the CFRP＇s microstructure. Results are lower strength and stiffness whereas the strain to failure increases or remains unchanged. Toughness is almost not affected. In C/C composites inhomogenities due to a reduced bundle size reduce strain to failure, strength, stiffness and toughness. Vice versa a declining fibre volume fraction leads to exactly the opposite behaviour. Increasing the fabric density （weight per unit area） causes similar effects as in CFRPs.展开更多
目的:旨在研究不同预后及严重程度的创伤性颅脑损伤(TBI)患者T淋巴细胞亚群和CRP水平分析。方法:回顾性分析宜春新建医院2022年5月—2023年6月收治的100例创伤性颅脑损伤患者临床数据。根据患者入院时格拉斯哥昏迷量表(Glasgow coma sca...目的:旨在研究不同预后及严重程度的创伤性颅脑损伤(TBI)患者T淋巴细胞亚群和CRP水平分析。方法:回顾性分析宜春新建医院2022年5月—2023年6月收治的100例创伤性颅脑损伤患者临床数据。根据患者入院时格拉斯哥昏迷量表(Glasgow coma scale,GCS)评分将其分为三组,轻型组(25例):GCS评分13~15分;中型组(33例):GCS评分9~12分;重型组(42例):GCS评分为3~8分,选取同期体检正常志愿者100例为对照组。根据TBI预后存活情况分为存活组90例、死亡组10例,观察并比较不同组别患者的T淋巴细胞亚群(CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+))、C反应蛋白(CRP),并分析各指标之间的相关性。结果:不同颅脑损伤组血清CD8^(+)、CRP水平均高于对照组,CD4^(+)、CD3^(+)水平及CD4^(+)/CD8^(+)均低于对照组(P<0.05);重型组、中型组CD8^(+)水平均高于轻型组,CD4^(+)、CD3^(+)水平及CD4^(+)/CD8^(+)均低于轻型组(P<0.05);重型组CD8^(+)水平高于中型组,CD4^(+)、CD3^(+)水平及CD4^(+)/CD8^(+)均低于中型组(P<0.05);重型组CRP水平高于中型组和轻型组,中型组高于轻型组(P<0.05)。存活组CD4^(+)、CD4^(+)/CD8^(+)均较死亡组高,CD8^(+)、CPR均低(P<0.05)。根据Pearson统计分析显示,TBI患者的CRP与CD4^(+)、CD3^(+)、CD4^(+)/CD8^(+)均呈负相关,CRP与CD8^(+)呈正相关(P<0.05)。结论:不同预后及严重程度的创伤性颅脑损伤患者中,CRP水平与CD8^(+)呈正相关,与CD4^(+)、CD3^(+)及CD4^(+)/CD8^(+)均呈负相关,且严重程度越高CRP水平越高,CD4^(+)、CD3^(+)及CD4^(+)/CD8^(+)水平越低。展开更多
文摘目的:探讨治疗前淋巴细胞与C反应蛋白比值(LCR)对结外NK/T细胞淋巴瘤(ENKTL)预后的判断价值。方法:回顾性分析郑州大学第一附属医院收治的203例初诊为ENKTL患者的临床资料,ROC曲线得到LCR预测5 a总生存期(OS)的最佳截断值,并根据截断值将患者分为两组,绘制Kaplan-Meier生存曲线,采用Cox回归分析无进展生存期(PFS)和OS的影响因素。结果:LCR预测5 a OS的最佳截断值为0.19,低LCR组患者预后较差(P<0.001)。Cox回归分析结果表明,低LCR组ENKTL患者预后较差,PFS和OS的HR(95%CI)分别为0.462(0.336~0.636)和0.381(0.275~0.527)。结论:治疗前LCR可影响ENKTL预后,低LCR患者的预后较差。
文摘目的:分析趋化因子受体8(C⁃C motif chemokine receptor 8,CCR8)在卵巢癌肿瘤浸润性调节性T细胞(regulatory T cell,Treg)中的表达,探讨CCR8对Treg分化的作用。方法:构建C57BL/6小鼠卵巢癌细胞ID8荷瘤模型;流式细胞术检测小鼠肿瘤组织、脾脏和外周血中Treg上CCR8的表达比例,CCR8^(+)Treg上免疫检查点相关蛋白程序性细胞死亡蛋白1(programmed cell death protein 1,PD⁃1)、细胞素性T淋巴细胞抗原4(cytotoxic T⁃lymphocyte antigen 4,CTLA⁃4)、可诱导的T细胞共刺激分子(inducible T cell costimulators,ICOS)、淋巴细胞激活基因3(lymphocyte activation gene 3,LAG⁃3)的表达;流式细胞术检测CCR8变构抑制剂AZ084加入前后对C57BL/6小鼠脾脏中初始CD4^(+)T细胞向Treg分化的影响。结果:卵巢癌荷瘤小鼠肿瘤中Treg上的CCR8表达相比脾脏、外周血的Treg显著增高;相比CCR8^(-)Treg,CCR8^(+)Treg上免疫检查点相关蛋白表达更高;AZ084有效抑制小鼠脾脏中初始CD4^(+)T细胞向Treg的分化。结论:CCR8^(+)Treg在肿瘤浸润性Treg中占主要比例,CCR8作为卵巢癌浸润性Treg的主要标志物,变构CCR8蛋白可以抑制Treg的分化。靶向消除CCR8^(+)Treg可为改善卵巢癌肿瘤微环境的免疫抑制状态提供新思路。
文摘The effects of fibre/matrix bonding, fabric density, fibre volume fraction and bundle size on microstructure, mechanical properties and failure mechanisms in carbon fibre reinforced composites （plastic and carbon matrix） have been investigated. The microstructure of unloaded and cracked samples was studied by optical microscopy and scanning electron microscopy （SEM）, respectively whereas the mechanical behaviour was examined by 3- point bending experiments. Exclusively one type of experimental resole type phenolic resin was applied. A strong fibre/matrix bonding, which is needed for high strength of carbon fibre reinforced plastic （CFRP） materials leads to severe composite damages during the pyrolysis resulting in low strength, brittle failure and a very low utilisation of the fibres strain to failure in C/C composites. Inherent fabric parameters such as an increasing fabric density or bundle size or a reduced fibre volume fraction introduce inhomogenities to the CFRP＇s microstructure. Results are lower strength and stiffness whereas the strain to failure increases or remains unchanged. Toughness is almost not affected. In C/C composites inhomogenities due to a reduced bundle size reduce strain to failure, strength, stiffness and toughness. Vice versa a declining fibre volume fraction leads to exactly the opposite behaviour. Increasing the fabric density （weight per unit area） causes similar effects as in CFRPs.
文摘目的:旨在研究不同预后及严重程度的创伤性颅脑损伤(TBI)患者T淋巴细胞亚群和CRP水平分析。方法:回顾性分析宜春新建医院2022年5月—2023年6月收治的100例创伤性颅脑损伤患者临床数据。根据患者入院时格拉斯哥昏迷量表(Glasgow coma scale,GCS)评分将其分为三组,轻型组(25例):GCS评分13~15分;中型组(33例):GCS评分9~12分;重型组(42例):GCS评分为3~8分,选取同期体检正常志愿者100例为对照组。根据TBI预后存活情况分为存活组90例、死亡组10例,观察并比较不同组别患者的T淋巴细胞亚群(CD4^(+)、CD8^(+)、CD4^(+)/CD8^(+))、C反应蛋白(CRP),并分析各指标之间的相关性。结果:不同颅脑损伤组血清CD8^(+)、CRP水平均高于对照组,CD4^(+)、CD3^(+)水平及CD4^(+)/CD8^(+)均低于对照组(P<0.05);重型组、中型组CD8^(+)水平均高于轻型组,CD4^(+)、CD3^(+)水平及CD4^(+)/CD8^(+)均低于轻型组(P<0.05);重型组CD8^(+)水平高于中型组,CD4^(+)、CD3^(+)水平及CD4^(+)/CD8^(+)均低于中型组(P<0.05);重型组CRP水平高于中型组和轻型组,中型组高于轻型组(P<0.05)。存活组CD4^(+)、CD4^(+)/CD8^(+)均较死亡组高,CD8^(+)、CPR均低(P<0.05)。根据Pearson统计分析显示,TBI患者的CRP与CD4^(+)、CD3^(+)、CD4^(+)/CD8^(+)均呈负相关,CRP与CD8^(+)呈正相关(P<0.05)。结论:不同预后及严重程度的创伤性颅脑损伤患者中,CRP水平与CD8^(+)呈正相关,与CD4^(+)、CD3^(+)及CD4^(+)/CD8^(+)均呈负相关,且严重程度越高CRP水平越高,CD4^(+)、CD3^(+)及CD4^(+)/CD8^(+)水平越低。
