R. J. Komban et al. ( 2019)
Nature communications 10 1 2423
Activated Peyer's patch B cells sample antigen directly from M cells in the subepithelial dome.
The germinal center (GC) reaction in Peyer's patches (PP) requires continuous access to antigens,but how this is achieved is not known. Here we show that activated antigen-specific CCR6+CCR1+GL7- B cells make close contact with M cells in the subepithelial dome (SED). Using in situ photoactivation analysis of antigen-specific SED B cells,we find migration of cells towards the GC. Following antigen injection into ligated intestinal loops containing PPs,40{\%} of antigen-specific SED B cells bind antigen within 2 h,whereas unspecifc cells do not,indicating B cell-receptor involvment. Antigen-loading is not observed in M cell-deficient mice,but is unperturbed in mice depleted of classical dendritic cells (DC). Thus,we report a M cell-B cell antigen-specific transporting pathway in PP that is independent of DC. We propose that this antigen transporting pathway has a critical role in gut IgA responses,and should be taken into account when developing mucosal vaccines.
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产品类型：
产品号#：
19854
19854RF
产品名：
EasySep™小鼠B细胞分选试剂盒
RoboSep™ 小鼠B细胞分选试剂盒
Grimaldi JC et al. (JUN 1999)
Journal of Leukocyte Biology 65 6 846--53
Depletion of eosinophils in mice through the use of antibodies specific for C-C chemokine receptor 3 (CCR3).
We have generated rat monoclonal antibodies specific for the mouse eotaxin receptor,C-C chemokine receptor 3 (CCR3). Several anti-CCR3 mAbs proved to be useful for in vivo depletion of CCR3-expressing cells and immunofluorescent staining. In vivo CCR3 mAbs of the IgG2b isotype substantially depleted blood eosinophil levels in Nippostrongyus brasiliensis-infected mice. Repeated anti-CCR3 mAb treatment in these mice significantly reduced tissue eosinophilia in the lung tissue and bronchoalveolar lavage fluid. Flow cytometry revealed that mCCR3 was expressed on eosinophils but not on stem cells,dendritic cells,or cells from the thymus,lymph node,or spleen of normal mice. Unlike human Th2 cells,mouse Th2 cells did not express detectable levels of CCR3 nor did they give a measurable response to eotaxin. None of the mAbs were antagonists or agonists of CCR3 calcium mobilization. To our knowledge,the antibodies described here are the first mAbs reported to be specific for mouse eosinophils and to be readily applicable for the detection,isolation,and in vivo depletion of eosinophils.
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产品类型：
产品号#：
03800
03801
03802
03803
03804
03805
03806
产品名：
ClonaCell™-HY杂交瘤试剂盒
ClonaCell™-HY培养基A
ClonaCell™-HY 培养基 B
ClonaCell™-HY 培养基 C
ClonaCell™-HY 培养基 D
ClonaCell™-HY 培养基 E
ClonaCell™-HY PEG
D. G. W. Alanine et al. (jun 2019)
Cell 178 1 216--228
Human Antibodies that Slow Erythrocyte Invasion Potentiate Malaria-Neutralizing Antibodies.
The Plasmodium falciparum reticulocyte-binding protein homolog 5 (PfRH5) is the leading target for next-generation vaccines against the disease-causing blood-stage of malaria. However,little is known about how human antibodies confer functional immunity against this antigen. We isolated a panel of human monoclonal antibodies (mAbs) against PfRH5 from peripheral blood B cells from vaccinees in the first clinical trial of a PfRH5-based vaccine. We identified a subset of mAbs with neutralizing activity that bind to three distinct sites and another subset of mAbs that are non-functional,or even antagonistic to neutralizing antibodies. We also identify the epitope of a novel group of non-neutralizing antibodies that significantly reduce the speed of red blood cell invasion by the merozoite,thereby potentiating the effect of all neutralizing PfRH5 antibodies as well as synergizing with antibodies targeting other malaria invasion proteins. Our results provide a roadmap for structure-guided vaccine development to maximize antibody efficacy against blood-stage malaria.
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产品类型：
产品号#：
19054
19054RF
17963
17963RF
产品名：
EasySep™人B细胞富集试剂盒
RoboSep™ 人B细胞富集试剂盒含滤芯吸头
EasySep™人B细胞富集试剂盒II（不去除CD43）
RoboSep™ 人B细胞富集试剂盒II（不去除CD43）
S. Balu et al. ( 2011)
The Journal of Immunology 186 3113-3119
A novel human IgA monoclonal antibody protects against tuberculosis
Abs have been shown to be protective in passive immunotherapy of tuberculous infection using mouse experimental models. In this study,we report on the properties of a novel human IgA1,constructed using a single-chain variable fragment clone (2E9),selected from an Ab phage library. The purified Ab monomer revealed high binding affinities for the mycobacterial ?-crystallin Ag and for the human Fc?RI (CD89) IgA receptor. Intranasal inoculations with 2E9IgA1 and recombinant mouse IFN-? significantly inhibited pulmonary H37Rv infection in mice transgenic for human CD89 but not in CD89-negative littermate controls,suggesting that binding to CD89 was necessary for the IgA-imparted passive protection. 2E9IgA1 added to human whole-blood or monocyte cultures inhibited luciferase-tagged H37Rv infection although not for all tested blood donors. Inhibition by 2E9IgA1 was synergistic with human rIFN-? in cultures of purified human monocytes but not in whole-blood cultures. The demonstration of the mandatory role of Fc?RI (CD89) for human IgA-mediated protection is important for understanding of the mechanisms involved and also for translation of this approach toward development of passive immunotherapy of tuberculosis.
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产品类型：
产品号#：
07801
19058
18060
18061
07861
07811
19058RF
100-1525
产品名：
EasySep™人单核细胞富集试剂盒（不去除CD16）
Lymphoprep™
Lymphoprep™
Lymphoprep™
Lymphoprep™
RoboSep™ 人单核细胞富集试剂盒（不去除CD16）含滤芯吸头
EasySep™人单核细胞富集试剂盒（不去除CD16）
Sasaki H et al. (FEB 2005)
Blood 105 3 1204--13
Overexpression of a cell adhesion molecule, TSLC1, as a possible molecular marker for acute-type adult T-cell leukemia.
Adult T-cell leukemia (ATL) caused by human T-cell leukemia virus type 1 (HTLV-1) infection,occurs in 2% to 4% of the HTLV-1 carriers with a long latent period,suggesting that additional alterations participate in the development of ATL. To characterize and identify novel markers of ATL,we examined the expression profiles of more than 12 000 genes in 8 cases of acute-type ATL using microarray. One hundred ninety-two genes containing interleukin 2 (IL-2) receptor alpha were up-regulated more than 2-fold compared with CD4(+) and CD4(+)CD45RO(+) T cells,and tumor suppressor in lung cancer 1 (TSLC1),caveolin 1,and prostaglandin D2 synthase showed increased expression of more than 30-fold. TSLC1 is a cell adhesion molecule originally identified as a tumor suppressor in the lung but lacks its expression in normal or activated T cells. We confirmed ectopic expression of the TSLC1 in all acute-type ATL cells and in 7 of 10 ATL- or HTLV-1-infected T-cell lines. Introduction of TSLC1 into a human ATL cell line ED enhanced both self-aggregation and adhesion ability to vascular endothelial cells. These results suggested that the ectopic expression of TSLC1 could provide a novel marker for acute-type ATL and may participate in tissue invasion,a characteristic feature of the malignant ATL cells.
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EasySep™小鼠TIL（CD45）正选试剂盒
技术公告Generation of B Cells from Cord Blood-Derived CD34+ Cells Using StemSpan™ Medium and Supplements
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