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排序方式: 共有208条查询结果,搜索用时 15 毫秒
1.
《European journal of cancer (Oxford, England : 1990)》2015,51(17):2708-2717
AimTo investigate whether the immune response in colorectal liver metastases is related to progression free survival (PFS) and if this may be influenced by systemic therapy.MethodsA retrospective central collection of tumour tissue was organised for the European Organisation for Research and Treatment of Cancer (EORTC) study 40983, where patients with colorectal liver metastases were treated by either resection alone or resection with perioperative FOLFOX. Immunostaining on whole slides was performed to recognise T-lymphocytes (CD3+, CD4+, CD8+), B-lymphocytes (CD20+), macrophages (CD68+) and mast cells (CD117+) inside the tumour, at the tumour border (TNI) and in normal liver tissue surrounding the tumour (0.5–2 mm from the TNI). Immunological response was compared between treatment arms and correlated to PFS.ResultsTumour tissue and immune response profiles were available for 82 resected patients, 38 in the perioperative chemotherapy arm and 44 in the surgery alone arm. Baseline patient and disease characteristics were similar between the treatment arms. In response to chemotherapy, we observed increased CD3+ lymphocyte and mast cell counts inside the tumour (p < 0.01), lower CD4+ lymphocytes in the normal liver tissue (p = 0.02) and lower macrophage counts in normal tissue (p < 0.01) and at the TNI (p = 0.02). High number of CD3+ lymphocyte and mast cells, and high T-cell score were correlated with tumour regression grade (TRG). Prolonged PFS correlated with the presence of mast cells in the tumour (9.8 versus 16.5 months, Hazard ratio (HR) 0.54 p = 0.03), higher CD3+ lymphocyte count at the TNI (10.8 versus 22.8 months, HR 0.57, p = 0.03) and T-cell score >2 (10.8 versus 38.6 months, HR 0.51, p = 0.04).ConclusionOur analyses in the context of a randomised study suggest that chemotherapy influences immune cell profiles, independent of patient characteristics. Immune responses of lymphocytes and mast cells were associated with pathological response to chemotherapy and to increased PFS. High CD3+ lymphocytes at the tumour front and intratumoural mast cells appear to be prognostic for patients with colorectal liver metastases. 相似文献
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目的探讨系统性红斑狼疮(SLE)患者和健康者静脉血B淋巴细胞成熟抗原(BCMA)表达和CD138+浆细胞数量的差异。方法将40例SLE患者血液标本作为SLE组,30例健康人血液标本作为对照组,采用荧光定量实时聚合酶链反应及酶联免疫吸附测定(ELISA)技术检测BCMA的表达,流式细胞技术检测静脉血CD138+浆细胞数量。结果 SLE组患者静脉血中BCMA mRNA水平、蛋白含量以及CD138+浆细胞的数量明显高于对照组(P<0.05)。结论 SLE患者中浆细胞数量的增多可能与BCMA高表达相关。 相似文献
4.
《International journal of radiation biology》2013,89(4):424-431
Purpose:?To analyse the role of in vitro radio-induced apoptosis of lymphocyte subpopulations as predictive test for late effects in cervical cancer patients treated with radiotherapy.Methods and materials:?Ninety-four consecutive patients and four healthy controls were included in the study. Toxicity was evaluated using the Late Effects Normal Tissue-Subjective, Objective, Management, and Analytic (LENT-SOMA) scale. Peripheral blood lymphocyte subpopulations were isolated and irradiated at 0, 1, 2 and 8 Gy, and then collected 24, 48 and 72 h after irradiation. Apoptosis was measured by flow cytometry.Results:?Radiation-induced apoptosis increased with radiation dose and time of incubation, and data fitted to a semi-logarithmic model defined by two constants: α (percentage of spontaneous cell death) and β (percentage of cell death induced at a determined radiation dose). Higher β values in cytotoxic T-lymphocytes (CD8) and bone cells (B-lymphocytes) were observed in patients with low bowel toxicity (hazard ratio (HR)?=?0.96, p?=?0.002 for B-cells); low rectal toxicity (HR?=?0.96, p?=?0.020; HR?=?0.93, p?=?0.05 for B and CD8 subpopulations respectively); low urinary toxicity (HR?=?0.93, p?=?0.003 for B-cells) and low sexual toxicity (HR?=?0.93, p?=?0.010 for CD8-cells).Conclusions:?Radiation-induced CD8 T-lymphocytes and, for the first time, B-lymphocytes apoptosis can predict differences in late toxicity in cervical cancer patients. 相似文献
5.
目的:观察IgA肾病(IgA nephropathy,IgAN)患者腭扁桃体、外周血中记忆B细胞表达及腭扁桃体切除后外周血记忆B细胞表达的变化,了解腭扁桃体在IgAN发病机制中的作用,为IgAN的治疗提供理论依据。方法:选取28例经临床和肾脏病理检查确诊为IgAN的患者腭扁桃体及外周血作为观察组,将27例慢性扁桃体炎患者腭扁桃体及10例正常健康者外周血作为对照组。采用流式细胞术检测记忆B细胞在腭扁桃体及外周血B细胞的表达,并分析IgAN患者腭扁桃体切除前、后外周血记忆B细胞的变化。结果:记忆B细胞在IgAN患者腭扁桃体及外周血高表达,分别为5.72%±5.26%和4.92%±5.10%;腭扁桃体切除前、后外周血中记忆B细胞表达百分率分别为4.92%±5.10%和1.10%±0.65%,差异有统计学意义,且腭扁桃体切除后外周血记忆B细胞表达基本恢复到正常水平。结论:记忆B细胞表达的高低为IgAN的临床进展研究提供了依据。 相似文献
6.
调节性T细胞在系统性红斑狼疮、银屑病、自身免疫性大疱病等疾病的发病机制中研究很多,随着在人体内发现分泌白细胞介素10的调节性B细胞,人们发现分泌白细胞介素10的调节性B细胞和其分泌的白细胞介素10有负向免疫调节作用,对疾病有保护作用.许多研究表明,在这些疾病中,分泌白细胞介素10的调节性B细胞的数量、功能和其分泌的白细胞介素10水平存在异常,认为这些异常与疾病的发病和病情有关. 相似文献
7.
免疫球蛋白κ(Igκ)链是免疫球蛋白的一条轻链。免疫球蛋白基因主要由3个不同的基因位点组成,κ链、 λ链、重链。正常情况下免疫球蛋白轻链与免疫球蛋白重链结合形成功能性的免疫球蛋白复合物。κ或λ游离轻链
(FLCs)是由B淋巴细胞在免疫球蛋白合成过程中产生的,过去认为FLCs没有任何功能,但是目前证实FLCs参与了
免疫应答的几个关键过程,在不同的疾病中FLCs浓度高低与病程预后有极大的相关性。FLCs会导致肥大细胞脱颗
粒,如炎症性肠病中肥大细胞会释放炎性介质,并刺激局部炎症反应。而且在一些自身免疫性疾病中FLCs浓度的水
平也显著升高。FLCs不仅对非肿瘤性疾病中有一定的影响,肿瘤组织浸润的B淋巴细胞分泌Igκ,且Igκ的表达水平
与肿瘤的发生、发展密切相关。本文主要就Igκ的结构功能及其在疾病发生过程中的作用进行综述。 相似文献
8.
目的探讨HBV感染患者外周血淋巴细胞亚群在疾病进展过程中的表达变化。方法选取2018年1月-2019年4月在天津市第二人民医院住院的慢性HBV感染患者共132例,其中慢性乙型肝炎患者47例,乙型肝炎肝硬化患者44例,乙型肝炎肝硬化相关原发性肝癌患者41例。另选取同期健康体检者42例作为对照组。采用流式细胞术检测4组外周血淋巴细胞亚群精准计数,比较4组外周血淋巴细胞亚群的表达水平。正态分布的计量资料,组间方差不齐采用Welch方差分析,两两比较采用GamesHowell检验。非正态分布的计量资料多组间及进一步两两比较采用Kruskal-Wallis H检验。计数资料组间比较采用χ2检验。相关性分析采用Spearman检验。结果与对照组和慢性乙型肝炎组相比,肝硬化组和肝癌组CD3^+、CD4^+T淋巴细胞数量明显减少,差异均有统计学意义(P值均<0.05)。与对照组相比,肝癌组CD8^+T淋巴细胞数量明显减少,差异有统计学意义(P<0.05);与慢性乙型肝炎组相比,肝硬化组和肝癌组CD8^+T淋巴细胞数量明显减少,差异均有统计学意义(P值均<0.05)。与对照组和慢性乙型肝炎组相比,肝硬化组和肝癌组CD19^+B淋巴细胞数量明显减少,差异均有统计学意义(P值均<0.05)。与对照组相比,肝硬化组和肝癌组CD16^+CD56^+NK细胞数量明显减少,差异均有统计学意义(P值均<0.05);与慢性乙型肝炎组比较,肝癌组CD16^+CD56^+NK细胞数量明显减少,差异有统计学意义(P<0.05)。4组疾病进展与外周血CD3^+T淋巴细胞、CD4^+T淋巴细胞、CD8^+T淋巴细胞、CD19^+B淋巴细胞、CD16^+CD56^+NK细胞呈明显负相关(r值分别为-0.414、-0.503、-0.269、-0.435、-0.402,P值均<0.01)。结论随着疾病的进展,慢性HBV感染患者免疫状态发生变化。外周血淋巴细胞亚群精准计数能够反应机体的免疫状态,可作为慢性HBV感染临床病情演变、治疗效果及疾病预后的参考依据。 相似文献
9.
Persis P. Wadia Nancy D. Herrera Michael M. Abecassis Anat R. Tambur 《Human immunology》2009,70(9):692-700
Mycophenolic acid (MPA) is considered an immunosuppressive compound mainly because of its inhibitory effects on lymphocyte proliferation. Here we studied specifically the effects of MPA on the ability of dendritic cells (DCs) to activate T cells via the indirect pathway and on the maturation and function of B-lineage cells. We demonstrated that DC cell-surface receptors, associated with antigen uptake and antigen processing and presentation (CD83 and CD205), were differentially downregulated in the presence of MPA, translating into a decreased uptake of alloantigens and reduced stimulation of T cells with decreased cytokine secretion (interleukin (IL)-1Ra and transforming growth factor (TGF)-α). Similarly, MPA significantly inhibited B-cell differentiation into memory and plasma cells in vitro and decreased secretion of TNF-α, IL-1Ra, and IL-10. We further demonstrated for the first time that not only the amount of antibody secretion was significantly lowered in the presence of MPA but also the total number of antibody-producing cells was reduced. Importantly, we provide direct evidence that HLA-specific antibody secretion was also affected using a newly developed HLA antibody-specific B-cell enzyme-linked immunospot assay. Our data indicate additional pathways by which MPA downregulates the immune system. This in turn may lead to improved conditions for allograft tolerance and control of allograft rejection. 相似文献
10.
Emilia Bialopiotrowicz Bozena Kuzniewska Neli Kachamakova-Trojanowska Maria Barcikowska Jacek Kuznicki Urszula Wojda 《Neurobiology of aging》2011,32(12):2319
Cell cycle (CC) reactivation in neurons seems to underlie the development of Alzheimer's disease (AD). We analyzed whether CC alterations can be detected in immortalized lymphocytes from patients with the sporadic and the familial form of AD (SAD and FAD). Real-time polymerase chain reaction (PCR)-arrays, immunoblotting, and flow cytometry demonstrated differences in the regulation of G1/S phases between SAD lymphocytes and cells from nondemented subjects, as well as between SAD and FAD cells. SAD compared to FAD lymphocytes showed differences in expression profiles of the 90 CC genes, and a marked increase in the level of the p21 protein, which promotes G1-arrest. Accordingly, SAD but not FAD cells had a prolonged G1-phase. γ-secretase inhibition did not change the CC profiles of the cell lines. These data show that SAD involves a prolongation of the G1 phase driven by p21 pathway, which is not activated in FAD cells. Thus, the mechanism in SAD differs from FAD. Moreover, disturbances of the CC in lymphocytes have a potential diagnostic value. 相似文献