简介:摘要目的探讨晚期胃癌患者一线化疗后给予自体树突状细胞及细胞因子诱导的杀伤细胞(DC-CIK)维持治疗的临床疗效及对免疫细胞的影响。方法选取2013—2016年间兰州大学第一医院经XELOX/SOX/FOLFOX方案一线化疗后达部分缓解或稳定的107例Ⅳ期胃癌患者入组研究,其中53例作为观察组在末次化疗结束后给予自体DC-CIK细胞免疫治疗3个疗程,54例不进一步处理者作为对照组。比较两组患者的临床疗效及维持治疗前后T细胞亚群的变化。结果观察组的疾病控制率,1年无进展生存率,1、2年总生存率均高于对照组(75%∶46%, P<0.05; 60%∶33%, P<0.05; 68%∶44%; 32%∶17%, P<0.05)。两组患者的CD3(+)、CD4(+)、CD4(+)/CD8(+)较DC-CIK细胞维持治疗前升高,且观察组患者的D3(+)、D3(+)CD4(+)水平均高于对照组(P<0.05)。结论化疗后DC-CIK细胞维持治疗明显优于单纯化疗,能够提高晚期胃癌患者的临床疗效,改善免疫功能,延长生存期,为晚期胃癌的治疗提供新的思路。
简介:摘要自然杀伤细胞(NK)和树突状细胞(DCs)之间的相互作用在调节固有免疫应答的早期阶段以及随后的适应性免疫应答中的作用机制近年来才被阐明。NK细胞与DCs之间的相互作用导致NK细胞活化、DCs成熟或凋亡,并涉及细胞因子与细胞间的直接接触。NK细胞通过诱导偏向Th1免疫应答的DCs成熟,为DCs提供抗原和杀伤未经适当成熟的iDC,来控制和增强DCs介导的抗病毒免疫应答;DCs通过可溶性和细胞接触性激活剂刺激NK细胞,从而增强其细胞增殖、存活和细胞毒性来调节固有免疫应答的强弱。最近的研究表明,NK细胞和DCs之间的相互作用在几种抗病毒反应中也起着至关重要的作用。因此,本文综述了NK-DC相互作用及其与抗病毒反应的关系,以此为病毒感染疾病中NK-DC相互作用的分子机制研究提供理论基础。
简介:摘要:本文介绍了基于DC3000V供电的轨道车辆的设计与研制,并对牵引系统、辅助供电等关键系统的设计进行详细说明,为后续同类型项目设计提供借鉴。
简介:摘要:随着经济的增长以及人们生活水平的提高,人们对于电能的需求越来越大,如何在需求和供给之间维持平衡,不仅要关注变电站的建设情况,也要提升变电站设备的日常维修工作。只有保证日常维修以及规划性维修项目落到实处,才能充分发挥检修计划和方案的优势,更好地完成供电任务。本文首先对 35
简介:AbstractImportance:Within the coronavirus disease 2019 (COVID-19) global pandemic, more attention is warranted for whether this new infectious disease has unique manifestations in children.Objective:To retrospectively determine the epidemiological and clinical characteristics of 35 children with COVID-19 in Beijing, China.Methods:We collected data for 35 children diagnosed with COVID-19 who were admitted to Beijing Ditan Hospital from January 2020 to June 2020, and analyzed their epidemiological characteristics, clinical manifestations, laboratory examinations, chest imaging findings, treatments, and outcomes.Results:The children comprised 18 boys (51.4%) and 17 girls (48.6%) aged 6 months to 15 years. All patients had clear epidemiological history, with family clusters accounting for 28 cases (80.0%) and clear tracing of exposure to high epidemic areas in the remaining 7 cases (20.0%). Four (11.4%) patients were classified as asymptomatic, 17 (48.6%) as acute upper respiratory infection, and 14 (40.0%) as mild pneumonia, with no severe or critical cases. Clinical manifestations were mild, including fever in 18 (51.4%), cough in 14 (40.0%), and nausea and diarrhea in 7 (20.0%) patients. White blood cell count was mostly normal (26 cases, 74.3%) or decreased (7 cases, 20.0%); lymphocyte percentage was increased in 24 (68.7%); neutrophil percentage was decreased in 25 (71.4%); alanine aminotransferase was increased in 3 (8.6%); and serum potassium was decreased in 4 (11.4%). Time to negative viral nucleic acid testing was 2-42 days (mean: 14.0 ± 9.4 days). Chest imaging examination revealed that 20 patients (57.1%) had different forms of lung inflammation. Treatment was mainly isolation and nutritional support. Eleven patients were treated with interferon atomization inhalation. No patients required oxygen therapy. All 35 children were cured and discharged. Length of hospital stay was 9-54 days (mean: 25.4 ± 13.8 days). During regular follow-up after discharge, 5 children showed positivity again in the viral nucleic acid test and were re-hospitalized for observation and treatment. The mean length of re-hospitalization stay was 10.8 days.Interpretation:Children with COVID-19 mainly become infected within their family, and children of all ages are generally susceptible. The disease in children is mostly mild and the prognosis is good. Nucleic acid tests in some patients become positive again after discharge, suggesting that it is of great significance to carry out centralized isolation medical observations and active nucleic acid tests in close contacts for early detection of patients and routine epidemic prevention and control.