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1.
In our search for new violet-excitable dyes with improved photophysical and photochemical properties, we examined several halogen-substituted hydroxycoumarins and found that chlorinated derivatives are at least as bright as their fluorinated analogs. A monochlorinated hydroxycoumarin was found to have a high quantum yield (∼0.98), and human leucocyte-specific monoclonal antibodies (CD3, CD4, and CD45) conjugated with this dye exhibited reliable performance in flow cytometry assays. Additional studies were performed, with BD Horizon V450-antibody conjugates being included in eight-color cocktails aimed at subsetting lymphocytes and myeloid cells. Such cocktails can frequently be unstable due to the tendency of one or more components to lose structural integrity, photobleach, or develop unwanted affinities for another component. However, the cocktails employed in this study enabled several different applications to be run and established that multicolor reagent mixtures containing V450-antibody conjugates are functional and stable.  相似文献
2.
本文运用荧光原位杂交(FISH)技术结合淋巴细胞免疫表型分型方法,检测了血管免疫母细胞淋巴结病(AILD)中含有特征性+3细胞的免疫表型特征、细胞先经CD4和CD8免疫分型,再用3号染色体着丝粒异性的DNA探针作原位杂交。结果发现含有+3的细胞CD4和CD8阳性,即外周辅助性T细胞和抑制性T细胞均含有+3,说咀+3的畸变发生于胸腺中处于中期分化阶段的普通胸腺细胞,从而推测AILD可能起源于胸腺幼稚的T细胞。  相似文献
3.
用单克隆抗体LCA,UCHL1,MT1,MB1,MB2,LN1和LN2对65例非何杰金氏淋巴瘤常规福尔马林固定石蜡包埋组织切片作免疫表型研究。证实B细胞性淋巴瘤50例(77%)。T细胞性淋巴瘤11例(17%)(4例染色不良,未能分型)。根据国际工作分类,本组T细胞淋巴瘤所占比例分别是11%,27%和13%。全部病例中LCA阳性率97%。T细胞抗体UCHL;阳性率(91%)明显高于MT1(73%),且与B淋巴细胞无交叉反应。4种B细胞抗体阳性率分别为LN。(96%),MB2(94%),LN1(86%),MB1(84%)。LN2和LN1对源于滤泡中心细胞淋巴瘤有更强的反应。研究结果表明上述单克隆抗体可有效用于非何杰金氏淋巴瘤石蜡切片的免疫组织化学标记,合理选用单克隆抗体有助于进行免疫学分型。  相似文献
4.
本文用10种单克隆抗体(McAb)分析了正常人周围血及有髓单个核细胞的免疫表型,以及急性淋巴细胞白血病(ALL)和急性髓细胞白血病(AML)的免疫表型,并以免疫双酶标记法观察了非T-ALL肿瘤细胞的肿瘤相关核仁抗原(HMNA)和细胞表面抗原的表达。结果:不同年龄正常群体周围血CD_4~+细胞数及CD_4/CD_8比值有差异;约3%的正常骨髓单个核细胞CD_(10)~+(ALL的抗原)。应用单克隆抗体对白血病的免疫分型,不仅能确诊肿瘤的谱系,还能了解细胞分化阶段。本文讨论了AML和ALL免疫分型中的鉴别性McAb。HMNA为多种肿瘤细胞的标记,本文观察到幼稚B细胞白血病及毛细胞白血病的肿瘤细胞中HMNA亦为阳性。  相似文献
5.
Wang J  Qi J  Shen H  Zhou J  Fang J  Chen H  Wang Z  Li H 《Cytokine》2006,34(5-6):297-302
The recombinant duck interleukin-2 (rduIL-2) monomer was firstly isolated under nature condition, and refolded by oxidization procedure. Refolded rduIL-2 monomer induced in vitro proliferation of Con A-stimulated duck splenocytes in a sensitive and dose-dependent manner, and up-regulated in vivo the amounts of CD4+ T cells with low dose of administration. However, high doses intermittent administration resulted in sever side effects in vivo, with typical lymphocytic interstitial pneumonitis and nephritis, and lymphocytic depletion in splenic corpuscle. Our findings might be beneficial to studies of both mechanism and applications in vivo of avian IL-2.  相似文献
6.
Periosteum-derived progenitor cells (PDPCs) were isolated by characteristic surface markers. Reproducibility of immunophenotypes of the PDPCs was characterized by flow cytometric analysis using fluorescence-activated cell sorter (FACS). SH2+, SH3+, SH4+, CD9+, CD90+ and CD105+ were important eternal characteristic cell surface markers for the PDPCs. The characterized PDPCs maintained their chondrogenic potential in pellet cultures until the 15th passage from primary cell culture.  相似文献
7.
The role of mechanisms underlying differentiation is considered in malignant transformation of hemoblastoses and epithelial tumors. In hemoblastoses, differentiation is intimately related to malignant transformation and they are underlain by the same mechanisms. Immunophenotyping of hemoblastoses is fully based on successive stages of their differentiation with characteristic expression of differentiation antigens. Unlike hemoblastoses, epithelial tumors gradually, in the course of progression, lose their differentiation due to the degradation of the connections with the microenvironment, which controls the direction and level of epithelial differentiation. Therefore, carcinomas are characterized by varying degrees of “antigenic simplification”, including the epithelial-mesenchymal transition.  相似文献
8.
We describe three lymphoid tumors with the same immunophenotype characteristic for chronic lymphoid leukemia (CD19+/CD5+, clonality of the light immunoglobulin chains, CD23+ and CD10). However, clinical picture and morphology of neoplastic cells dictate different clinical forms of these cases: chronic lymphoid leukemia, large cell transformation of chronic lymphoid leukemia and diffuse large B-cell lymphoma. Taking into account that immunophenotype reflects the origin of tumor, while clinical outcome and morphological features of cells reflect the stage of tumor progression and/or pathway of tumor formation, we discuss the approach to natural classification of lymphoid tumors based on the process of their evolution.  相似文献
9.
Statement of the Problem: The sheep erythrocyte membrane glycoprotein T11TS/SLFA-3 can form a ligand-receptor complex with CD2 present on immunocyte and exert stimuli for activation and proliferation. Regression of brain tumor with the application of T11TS indicates the probable role of microglia, the chief immunomodulatory cell within the brain compartment. In the present study microglial activation and immunophenotypic modulation were assessed in T11TS treated brain tumor-bearing animal models. Rat glioma models induced by chemical carcinogen ENU were treated with three consecutive doses of T11TS. Microglial cells from brain were isolated and assessed through E-rosette formation, SEM and FACS for CD2, MHC class II, CD25, and CD4. The preliminary indication of presence of CD2 on microglia through E-rosette formation was confirmed by SEM and FACS. MHC class II and CD2 single and double positive subpopulations exist, and their expression is also modulated in different doses of T11TS. A general trend of highest receptor saturation and microglial activation, measured through the activation marker CD25 and CD4 expression, was observed in 2nd dose of T11TS administration, which was then dampened via a complex immune feedback mechanism in the 3rd dose. Published in 2004.  相似文献
10.
This paper presents clinical chemistry, hematology and immunophenotyping data from 102 chimpanzees over a 2-year period. The groupings were: 3 years or less, 4-7 years, and 8 + years. These data are intended to augment formerly published information on these parameters and to serve as a concise reference guide for primate veterinarians and researchers for whom these data may be useful. This study has larger samplings than previously published data and more panel constituents by immunophenotyping.  相似文献
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