Abstract:
:Eosinophils can be isolated from a mixed suspension of granulocytes by different procedures. We compared functional responses of human eosinophils purified according to two different principles: (1) an fMLP-induced difference in specific gravity between eosinophils and neutrophils and (2) selective removal of neutrophils by means of immunomagnetic beads coated with CD16 mAb. The results showed that eosinophils isolated with the CD16 beads method have a higher capacity to synthesize platelet activating factor (PAF) after stimulation with serum-treated zymosan (STZ) than eosinophils purified with the fMLP method. Binding of STZ and subsequent activation of the respiratory burst were also increased in CD16-isolated eosinophils. Furthermore, eosinophils isolated with the CD16 beads showed stronger chemotactic responses towards C5a and PAF. The difference in activity of these eosinophil preparations might be explained by a loss of the more active cells during the isolation with the fMLP method: only 30-60% of the eosinophils were recovered with this method, in contrast to a recovery of more than 95% with the CD16 beads method. Indeed, this 'lost' population of eosinophils, subsequently purified with CD16-coated beads, had a higher respiratory burst activity. The alternative explanation, i.e., an enhancement of eosinophil function by the beads method, appeared not to be valid, because repurification of fMLP-isolated eosinophils in the presence of fresh neutrophils and CD16-coated beads did not change the reactivity of the eosinophils. We conclude that the fMLP method leads to selective purification of eosinophils with a resting (or 'unprimed') phenotype.
journal_name
J Immunol Methodsjournal_title
Journal of immunological methodsauthors
Blom M,Tool AT,Mul FP,Knol EF,Roos D,Verhoeven AJdoi
10.1016/0022-1759(94)00255-usubject
Has Abstractpub_date
1995-01-27 00:00:00pages
183-93issue
2eissn
0022-1759issn
1872-7905pii
002217599400255Ujournal_volume
178pub_type
杂志文章abstract::IgM antibodies are often of low affinity (dissociation constant (Kd) > 10(-5) M) and therefore they are usually neglected as tools in, e.g., immunoassays. Previous studies have shown that low affinity biological interactions can be studied and exploited in affinity chromatography, biosensor technology and capillary el...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/s0022-1759(98)00039-8
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abstract::The length of the heavy chain complementarity-determining region two (HCDR2) of the unmutated anti-p-azophenylarsonate (Ars) monoclonal antibody (36-65 mAb) was extended by three residues in order to test whether this insertion can provide additional contacts between the Ab and the antigen. Two libraries were generate...
journal_title:Journal of immunological methods
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abstract::We describe here a specific and sensitive assay for biologically active bovine type-I interferon (IFN) in an Mx/CAT reporter gene assay. The assay is based on Madin-Darby Bovine Kidney cells transfected with a plasmid, containing a human MxA promoter driving a chloramphenicol acetyltransferase (CAT) cDNA. CAT expressi...
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abstract::No standard procedure is available for the purification of human monoclonal antibodies for human i.v. administration. Here we describe the procedure developed for pilot scale purification of the human IgM monoclonal antibody COU-1 directed against a cancer-associated antigen. The hybridoma cells were grown in protein-...
journal_title:Journal of immunological methods
pub_type: 杂志文章
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abstract::Studies on the kinetics of antigenic peptide binding to major histocompatibility complex class II molecules have been used extensively to probe major histocompatibility complex (MHC) structure as well as to investigate the molecular mechanism of peptide recognition. Previous experiments have frequently been carried ou...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/0022-1759(94)90290-9
更新日期:1994-07-12 00:00:00
abstract::Enzyme-linked antibody was used to treat unfixed herpesvirus-infected human fetal lung cell cultures in a mode which permitted the visualizing of local sites of infection. Foci containing as few as 20 herpesvirus-infected cells produced sufficient viral mass to be easily detectable by this method. 'Clouds' or 'plumes'...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/0022-1759(81)90361-6
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abstract::The detection of specifically internal immunoglobulin by staining of fixed preparations of lymphoid cells with appropriate fluorescein-conjugated antisera can be hampered by binding of the conjugates to membrane-bound immunoglobulin. Without preventing staining through membrane-bound immunoglobulin, it is impossible ...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/0022-1759(79)90209-6
更新日期:1979-01-01 00:00:00
abstract::The identification and characterization of human mast cell (MC) functions are hindered by the shortage of MC populations suitable for investigation. Here, we present a novel technique for generating large numbers of well differentiated and functional human MCs from peripheral stem cells (=peripheral stem cell-derived ...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/j.jim.2014.07.003
更新日期:2014-11-01 00:00:00
abstract::Human monoclonal antibodies may be generated by electrofusion of human B lymphocytes with a human/mouse heteromyeloma line. In addition to a fusion protocol optimised for the fusion partners, the activation of B lymphocytes is crucial for fusion and hybrid efficiency. In this study, we initially treated peripheral blo...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/s0022-1759(01)00431-8
更新日期:2001-09-01 00:00:00
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journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/0022-1759(95)00210-3
更新日期:1995-12-15 00:00:00
abstract::Cut point determination is an important aspect of immunogenicity assay development. The cut point can be influenced by a myriad of factors. Key among those is the analytical variability of the assay itself and biological variation due to test samples. Since a smaller cut point value may result in improved sensitivity,...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/j.jim.2018.10.001
更新日期:2018-12-01 00:00:00
abstract::Dendritic cells (DC) are increasingly explored as cellular vaccines for tumor immunotherapy. In most reported DC-based cancer vaccine trials, DC have been pulsed with soluble tumor antigen-derived peptide ligands of MHC molecules. Considering that the half-life of peptide/MHC complexes on the cell surface is relativel...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/j.jim.2004.01.010
更新日期:2004-04-01 00:00:00
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journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/s0022-1759(01)00439-2
更新日期:2001-10-01 00:00:00
abstract::Structural point mutations in exon 1 at codons 52, 54 and 57 and a promotor polymorphism at -221 bp of the mannose-binding lectin (MBL) gene are associated with increased susceptibility to various infectious diseases. We developed a genotyping method based on the 5' nuclease (TaqMan) assay in combination with the use ...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/j.jim.2004.01.025
更新日期:2004-04-01 00:00:00
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journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/j.jim.2004.01.002
更新日期:2004-03-01 00:00:00
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journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/0022-1759(86)90231-0
更新日期:1986-11-20 00:00:00
abstract::A novel rigid and renewable transducing material for electrochemical immunosensing, based on Protein A bulk-modified graphite-epoxy biocomposite (ProtA-GEB) is reported. Protein A is able to bind to the Fc region of antibodies and provide an affinity matrix for antibody immobilisation onto the transducer. The rigid co...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/j.jim.2003.11.014
更新日期:2004-03-01 00:00:00
abstract::An immunoaffinity method for the purification of hepatitis B surface antigen (HBsAg) using monoclonal anti-idiotype (anti-Id) as a specific eluent is described. Ammonium sulfate fractions of HBsAg-containing plasma were absorbed on monoclonal idiotype (Id) immunoadsorbents. The bound material was eluted from the colum...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/0022-1759(90)90019-r
更新日期:1990-01-24 00:00:00
abstract::Respiratory enteric orphan virus (reovirus) has been used to study many aspects of the biology and genetics of viruses, viral infection, pathogenesis, and the immune response to virus infection. This report describes the functional activity of virus labeled with Alexa Fluor 488, a stable fluorescent dye. Matrix assist...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/j.jim.2006.05.008
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journal_title:Journal of immunological methods
pub_type: 杂志文章
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journal_title:Journal of immunological methods
pub_type: 杂志文章
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journal_title:Journal of immunological methods
pub_type: 杂志文章
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更新日期:2001-05-01 00:00:00
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journal_title:Journal of immunological methods
pub_type: 杂志文章
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abstract::A new micro-glass-tube leukocyte adherence inhibition (LAI) assay which is appropriate for detecting delayed type hypersensitivity in vitro has been developed for human leukocytes. Enumeration of adherent cells is replaced by a cellular radioimmunoassay determining antibody binding of the monoclonal reagents, OKT4, OK...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/0022-1759(86)90482-5
更新日期:1986-07-24 00:00:00
abstract::Passage of human peripheral blood leucocytes through Sephadex G-10 columns results in a complete depletion of monocytes. Microscopic examination and ingestion of latex particles failed to reveal any monocytes in the column-passed cells. The study of surface markers shows a slight enrichment of T-cells and a decrease o...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/0022-1759(78)90043-1
更新日期:1978-01-01 00:00:00
abstract::The aim of this study was to establish a cytokine-free, serum-free system which would enable the long-term survival and proliferation of human peripheral blood monocytes. Monocytes were isolated from peripheral blood mononuclear cells (PBMC) by adherence to untreated plastic petri dishes and maintained up to 6 weeks i...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/0022-1759(92)90323-l
更新日期:1992-08-30 00:00:00
abstract::The clinical value of assessing immunoglobulin (Ig)G and IgA subclasses in addition to the isotypes of soluble Igs in serum has been well established. >20years ago, the International Union of Immunological Societies and the World Health Organization performed collaborative studies in order to validate antibody (Ab) cl...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/j.jim.2017.09.008
更新日期:2019-12-01 00:00:00
abstract::Levels of acute phase cytokines secreted ex vivo by peripheral blood mononuclear cells (PBMCs) have been shown to be associated with clinical conditions or histologic lesions in renal transplant recipients. One of the limiting factors for the potential use of this assay as a diagnostic tool is the incubation time need...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/j.jim.2011.01.003
更新日期:2011-03-07 00:00:00
abstract::The U937 cell line has been shown to generate tumour necrosis factor alpha (TNF-alpha) in response to soluble stimuli such as PMA and LPS, but only after treatment with GM-CSF. We report here the generation of TNF-alpha from U937 cells following phagocytosis of opsonised zymozan particles without the need for pre-trea...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/0022-1759(92)90141-f
更新日期:1992-08-10 00:00:00
abstract::Antibody avidity, defined as the strength of binding between antibody and antigen, represents a functional measure of affinity maturation of antibodies. Determination of the antibody avidity is usually performed separating high and low avidity antibodies by dissociating agents, but measurement of the antibody avidity ...
journal_title:Journal of immunological methods
pub_type: 杂志文章
doi:10.1016/j.jim.2012.09.008
更新日期:2013-01-31 00:00:00