Abstract：
:A new and simple method for enzyme immunoassay of folic acid (FA) has been developed, which does not require extraction or heat denaturation of serum. FA-free serum for standards was prepared by a new immunosorbent technique as conventional methods were unsuccessful. The detection limit of the assay is 0.05 ng/ml. Intra- and interassay variabilities ranged between 5-13.3%. Analytical recoveries obtained after spiking with different amounts of FA ranged between 93-110%. We eliminated the interference of endogenous folate binding protein--a major problem in direct FA assay by incubating serum samples (or standards) with FA-HRP conjugate in antibody coated plates at 50 degrees C. Comparison of our data with results obtained by microbiological assay and also by heating samples in alkaline buffer showed good correlation.
journal_name
J Immunol Methodsjournal_title
Journal of immunological methodsauthors
Das Sarma J,Duttagupta C,Ali E,Dhar TKdoi
10.1016/0022-1759(95)00068-lsubject
Has Abstractpub_date
1995-07-17 00:00:00pages
7-14issue
1eissn
0022-1759issn
1872-7905pii
002217599500068Ljournal_volume
184pub_type
杂志文章abstract：:Hybridomas secreting monoclonal antibodies specific for hemoglobin nonenzymatically glycated in the non-A1c position were produced by fusion of SP 2/0 myeloma cells with spleen cells from BALB/c mice immunized with nonenzymatically glycated hemoglobin prepared from human erythrocytes. Wells containing hydridomas secre...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(91)90364-l
更新日期：1991-07-05 00:00:00
abstract：:Analytical affinity electrophoresis experiments are described as analogues of column and batch affinity experiments. The are based on crossed immunoelectrophoresis with included affinity, here concanavalian A (con A) and con A-Sepharose. Reactions with serum proteins and allergens from cow's hair and dander are descri...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(78)90037-6
更新日期：1978-01-01 00:00:00
abstract：:A mixed haemadsorption procedure for the detection and localisation of spermatozoal antigens is described. Sperm are immobilised by attaching them to the bases of wells on plastic plates using poly-L-lysine and antisera and sensitised red cells are then added to these wells. The technique uses simple reagents and allo...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(79)90242-4
更新日期：1979-05-10 00:00:00
abstract：:Two murine IgM monoclonal antibodies (MAs) directed against the lipid A portion of bacterial lipopolysaccharide (LPS) were compared in their binding to Re LPS and lipid A and their idiotypic make-up with rabbit anti-idiotypic sera. Horseradish peroxidase (HRPO)-labelled MAs 8-2 and 26-20 bound equally well to Re LPS. ...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(90)90308-i
更新日期：1990-06-12 00:00:00
abstract：:Rapid development in design and production of recombinant antibodies and antibody fragments specific for cell surface markers opens new opportunities for targeted delivery of therapeutic or imaging agents. However, the progress in this field is slowed by inactivation of many antibodies by chemical conjugation of paylo...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/j.jim.2004.03.011
更新日期：2004-06-01 00:00:00
abstract：:Pretreatment of polystyrene microplate wells with certain doses of UV light enhances their capacity for binding to single-stranded DNA, double stranded DNA and various synthetic polynucleotides. The use of UV-irradiated plates to immobilize nucleic acid antigens provides a simple, rapid, and specific ELISA for measuri...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(86)90390-x
更新日期：1986-06-10 00:00:00
abstract：:A sensitive and rapid immunoassay for the detection of tumor necrosis factor (TNF) has been developed. Magnetic monodisperse polymer particles (M-280 Dynabeads) used as solid phase material, were coated with a neutralizing mouse monoclonal antibody to TNF. The coated Dynabeads were shown to have a more rapid binding c...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(90)90387-b
更新日期：1990-12-05 00:00:00
abstract：:The proinflammatory cytokine IL-18 mediates IFN-gamma production as well as the induction of Th1 polarized immune responses in synergy with IL-12. In this study, we describe the production of isogeneic monoclonal antibodies (Mabs) directed against murine IL-18 (mIL-18). Immunization of IL-18-deficient mice with recomb...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/s0022-1759(01)00505-1
更新日期：2002-01-01 00:00:00
abstract：:In addition to their known implication in allergy studies, IgE antibodies are becoming an increasingly interesting antibody class in cancer research. However, large-scale purification of IgE antibodies still poses substantial challenges, as they cannot be purified using techniques commonly used for other immunoglobuli...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/j.jim.2020.112914
更新日期：2021-02-01 00:00:00
abstract：:Apoptosis and primary necrosis are the two modes of cell death induced by a lethal injury. The majority of structural and biochemical events occurring during cell death can be analysed by flow cytometry. The 7-aminoactinomycin D (7-AAD) assay can be used to detect the loss of membrane integrity during apoptosis of mur...
journal_title：Journal of immunological methods
pub_type： 杂志文章,评审
doi：10.1016/s0022-1759(02)00072-8
更新日期：2002-07-01 00:00:00
abstract：:A method for the preservation of mouse peritoneal macrophages is described. Using 5% dimethylsulphoxide with either a cooling rate of 1 degree C/min or two-step cooling with 10 min interruption at -30 degrres C allows 80% survival as judged by pinocytic activity. An important finding was that the cells must be handled...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(77)90139-9
更新日期：1977-01-01 00:00:00
abstract：:Two sets of expression vectors were constructed that permitted the efficient expression of single-chain Fv fragments (scFvs) fused N-terminally to an enhanced mutant of the green fluorescent protein GFP+ or the red fluorescent protein DsRed in insect and mammalian cells. The vectors allowed rapid cloning of scFv fragm...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/j.jim.2003.12.001
更新日期：2004-02-15 00:00:00
abstract：:An enzyme linked immunosorbent assay (ELISA) method for the detection of antibodies to platelets and leucocytes is presented. The method can be used for large numbers of samples. The method is objective when photometers are used. Approximately 50% of all cases of possible autoimmune thrombocytopenic purpura (A.T.P.) a...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(81)90116-2
更新日期：1981-01-01 00:00:00
abstract：:Cytotoxicity assays are widely used to evaluate the functional activity of NK and T cells against tumour target cells and the release of radioactive sodium chromate from labelled target cells is still the most commonly used marker of target lysis in culture supernatants. We describe here the standardization of a micro...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(94)90104-x
更新日期：1994-06-24 00:00:00
abstract：:The basic method for evaluating the efficacy of antibody-mediated immunity (AMI) dates from the 1890s and involves the administration of specific Ab to an immunologically naïve host followed by microbial or toxin challenge. Other methods used to evaluate AMI involve correlating the presence of specific Ab with resista...
journal_title：Journal of immunological methods
pub_type： 杂志文章,评审
doi：10.1016/j.jim.2004.04.027
更新日期：2004-08-01 00:00:00
abstract：:Pig peripheral blood lymphocytes, typed for LD antigens by negative reactions to homozygous cells in primary MLRs and for SD antigens by complement-mediated lymphocytotoxicity, were sensitised in vitro against X-irradiated lymphocytes. These "primed" cells were rechallenged with lymphocytes possessing a range of LD an...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(78)90151-5
更新日期：1978-01-01 00:00:00
abstract：:Cultured human melanoma and gastrointestinal carcinoma cells were detached from substrate and further dissociated by placing the culture vessel into a water-filled ultrasonic cleaner (43 kHz) and sonicating it for 10-50 s. Plating efficiency and long-term growth of three melanoma cell lines were similar after ultrasou...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(87)90480-7
更新日期：1987-11-23 00:00:00
abstract：:This work presents a method for analyzing protein microarrays using a colorimetric nanogold probe coupled with silver enhancement (gold-silver detection). In this method, the gold nanoparticles were introduced to the microarray by the specific binding of the gold-conjugated antibodies or streptavidins and then coupled...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/j.jim.2003.11.008
更新日期：2004-02-15 00:00:00
abstract：:In transplantation techniques previously described it was impossible to separate the effects of immunosuppressive treatments on the host from the effects directed at the allograft itself. The skin allograft retransplantation technique described here allows one to assess changes in the immunogenicity of the allograft g...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(84)90005-x
更新日期：1984-09-04 00:00:00
abstract：:We describe a method for the generation of high-affinity monoclonal antibodies, which combines the power of natural immune responses with in vitro panning, B cell culture, RT-PCR and expression of the recombinant product. B cells from immunised rabbits were incubated at approximately 1000-10,000 cells per well with so...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/j.jim.2006.08.010
更新日期：2006-10-20 00:00:00
abstract：:Here we extensively describe a FACS-based protocol for isolating intact non-stained human eosinophils from peripheral blood; a stop forward from our recently published initial study. This method of purification could be accomplished in <3 h with only small volumes of whole blood necessary, even in healthy subjects gen...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/j.jim.2018.09.003
更新日期：2018-12-01 00:00:00
abstract：:A competitive enzyme immunoassay for rat prolactin using an immunogen and a tracer obtained by recombinant DNA technology is described. Polyclonal antibodies were raised in rabbits immunized with a purified chimeric protein consisting of rat prolactin fused with two synthetic immunoglobulin G binding domains derived f...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(94)90264-x
更新日期：1994-03-10 00:00:00
abstract：:In this paper, we present a method for measuring antigen specific cytotoxic T lymphocyte (CTL) activity from individual mouse peripheral blood samples without animal sacrifice. Peripheral blood cells are stimulated in vitro with a cocktail of antigen, cytokines, costimulatory molecules and irradiated feeder cells resu...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/s0022-1759(99)00186-6
更新日期：2000-01-13 00:00:00
abstract：:Antigenic epitopes recognized by FoxP3(+) regulatory T cells (Treg) are poorly defined, largely due to a lack of assays for determining Treg specificity. We have developed a novel approach for detecting human Treg specific to peptide antigen, utilizing down-regulation of surface CD3 as a read-out of antigen recognitio...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/j.jim.2012.01.004
更新日期：2012-03-30 00:00:00
abstract：:The accumulation of 2-deoxy-D-[1-3H]glucose, a non-metabolised analogue of glucose provides a quantitative measurement of the state of activation of phagocytic cells. A microassay for 3H-deoxyglucose uptake by human neutrophils and monocytes is described. Optimal conditions for the assay include the use of 5 X 10(5) c...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(87)90443-1
更新日期：1987-04-02 00:00:00
abstract：:To date, studies on T cells in acute myeloid leukemia (AML) have been limited to flow cytometric analysis of whole peripheral blood mononuclear cell (PBMC) specimens or functional work looking at the impact of AML myeloblasts on normal or remission T cells. This lack of information on T cells at the time of presentati...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/j.jim.2009.06.010
更新日期：2009-08-31 00:00:00
abstract：:A flow cytometric method for enumeration of intracytoplasmic antibody-containing cells was developed. Flow cytometry was found to yield results comparable to traditional fluorescence microscopy in cells stimulated to produce intracytoplasmic antibody by either pokeweed mitogen or Epstein-Barr virus. This technique off...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(84)90083-8
更新日期：1984-02-24 00:00:00
abstract：:Toll-like receptor (TLR) agonists are currently being examined as adjuvants for vaccines, with several lead candidates now in licensed products or in late-stage clinical development. Guinea pigs are widely used for preclinical testing of drugs and vaccines; however, evaluation of TLR agonists in this model is hindered...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/j.jim.2011.07.021
更新日期：2011-10-28 00:00:00
abstract：:An improved sensitivity to low levels of hepatitis B surface antigen (HBsAg) was demonstrated when ELISA results were interpreted by a statistical method. The absorbance of each test well was compared with the mean absorbance of all low-colour test samples. Those wells with an absorbance of more than two standard devi...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/0022-1759(88)90316-x
更新日期：1988-11-25 00:00:00
abstract：:Interferon gamma (IFNγ) is a cytokine involved in many anti-viral and immunoregulatory processes. One of the major mechanisms through which IFNγ exerts these effects is by inducing expression of indoleamine 2,3 dioxygenase-1 (IDO1), an enzyme that catalyses the first, rate-limiting step of the kynurenine pathway. In t...
journal_title：Journal of immunological methods
pub_type： 杂志文章
doi：10.1016/j.jim.2013.05.011
更新日期：2013-08-30 00:00:00
