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Fluorescein Isothiocyanate (FITC), Clone LO_FLUO_1, Rat Mab anti_; flow_ELISA

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[#YSRTMCA1332] Fluorescein Isothiocyanate (FITC), Clone LO_FLUO_1, Rat Mab anti_; flow_ELISA


YSRTMCA1332 | Fluorescein Isothiocyanate (FITC), Clone LO_FLUO_1, Rat Mab anti_; flow_ELISA, 0.5 mg.
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(1) Design of a PKCδ-specific small peptide as a theragnostic agent for glioblastoma.[TOP]

Pubmed ID :26739937
Publication Date : //
Glioblastoma is an aggressive malignant brain tumor that starts in the brain or spine and frequently recurs after anticancer treatment. The development of an accurate diagnostic system combined with effective cancer therapy is essential to improve prognosis of glioma patients. Peptides, produced from phage display, are attractive biomolecules for glioma treatment because of their biostability, nontoxicity, and small size. In this study, we employed phage display methodology to screen for peptides that specifically recognize the target PKCδ as a novel biomarker for glioma. The phage library screening yielded four different peptides displayed on phages with a 20- to 200-pM Kd value for the recombinant PKCδ catalytic domain. Among these four phage peptides, we selected one to synthesize and tagged it with fluorescein isothiocyanate (FITC) based on the sequence of the PKCδ-binding phage clone. The synthetic peptide showed a relative binding affinity for antibody and localization in the U373 glioma cell. The kinase activity of PKCδ was inhibited by FITC-labeled peptide with an IC50 of 1.4 μM in vitro. Consequently, the peptide found in this study might be a promising therapeutic agent against malignant brain tumor.

Authors : Cho Jun-Haeng, Ha Na-Reum, Koh Seong-Ho, Yoon Moon-Young,

(2) Mannose-specific lectins that inhibit HIV infection bind nonspecifically to HIV Env-expressing cells.[TOP]

Pubmed ID :25868224
Publication Date : //
An approach to curing HIV/AIDS is to specifically kill all infected cells. Because the lectins, Hippeastrum hybrid agglutinin (HHA) and Galanthus nivalis agglutinin (GNA), are potent inhibitors of HIV infection and bind the oligomannans on the HIV Env protein, we hypothesized that they would bind specifically to cells expressing the HIV Env protein on their plasma membrane. Flow cytometry experiments indicated, however, that these lectins bind equivalently to both Env-expressing and control cells without Env.

Authors : Chau Deborah, Yee Michael, Gebremedhin Senait, Cheung Jennifer, Chino Takahiro, Düzgüneş Nejat,

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(6) CD16/32-specific biotinylated 2.4G2 single-chain Fv complexed with avidin-FITC enhances FITC-specific humoral immune response in vivo in a CD16-dependent manner.[TOP]

Pubmed ID :19951957
Publication Date : //
Fcgamma receptors (FcgammaRs) play an essential role in the regulation of immune response due to their ability to bind immune complexes. Activating FcgammaRs may facilitate antigen presentation and dendritic-cell maturation, while in the late phase of the immune response, the inhibitory FcgammaRIIb may down-regulate B-cell activation upon cross-linking with activating receptors. In this study, we investigated the in vivo role of FcgammaRs on the modulation of humoral immune response. In order to get well-defined immune complexes that can bind to both the activating and the inhibitory FcgammaRs, we designed a mono-biotinylated single-chain fragment variable construct from the rat anti-mouse CD16/32 clone 2.4G2, linked to avidin-FITC, and tested its effect on the FITC-hapten-specific T-independent type 2 (TI-2) and T-dependent (TD) immune response. When injected intravenously in mice, the complex bound to a small portion of B220+, CD11b(high) and CD11c(high) cells and was localized in the spleen on marginal zone macrophages 15 min after treatment. When applied as a booster following primary immunization with TI-2 (FITC-dextran) or TD (FITC-keyhole limpet haemocyanin) antigens, the complex elevated the number of hapten-specific IgM/IgG-producing B cells. This effect was diminished in CD16KO mice, suggesting that the activating-type FcgammaRIII might be a key mediator of this mechanism.

Authors : Angyal Adrienn, Szekeres Zsuzsanna, Balogh Péter, Neer Zsuzsa, Szarka Eszter, Virag Viktor, Medgyesi David, Prechl Jozsef, Sarmay Gabriella,

(7) Use of a FLAER-based WBC assay in the primary screening of PNH clones.[TOP]

Pubmed ID :19762534
Publication Date : //
Diagnosis of paroxysmal nocturnal hemoglobinuria (PNH) with flow cytometry traditionally involves the analysis of CD55 and CD59 on RBCs and neutrophils. However, the ability to accurately detect PNH RBCs is compromised by prior hemolysis and/or transfused RBCs. Patients with aplastic anemia (AA) and myelodysplastic syndrome (MDS) can also produce PNH clones. We recently described a multiparameter fluorescent aerolysin (FLAER)-based flow assay using CD45, CD33, and CD14 that accurately identified PNH monocyte and neutrophil clones in PNH, AA, and MDS. Here, we compared the efficiency of this WBC assay with a CD59-based assay on RBCs during a 3-year period. PNH clones were detected with the FLAER assay in 63 (11.8%) of 536 samples tested, whereas PNH RBCs were detected in only 33 (6.2%), and always with a smaller clone size. The FLAER assay on WBCs is a more sensitive and robust primary screening assay for detecting PNH clones in clinical samples.

Authors : Sutherland D Robert, Kuek Nancy, Azcona-Olivera Juan, Anderson Tanya, Acton Erica, Barth David, Keeney Michael,

(8) Quantum dots as new-generation fluorochromes for FISH: an appraisal.[TOP]

Pubmed ID :19644760
Publication Date : //
In the field of nanotechnology, quantum dots (QDs) are a novel class of inorganic fluorochromes composed of nanometre-scale crystals made of a semiconductor material. Given the remarkable optical properties that they possess, they have been proposed as an ideal material for use in fluorescent in-situ hybridization (FISH). That is, they are resistant to photobleaching and they excite at a wide range of wavelengths but emit light in a very narrow band that can be controlled by particle size and thus have the potential for multiplexing experiments. The principal aim of this study was to compare the potential of QDs against traditional organic fluorochromes in both indirect (i.e. QD-conjugated streptavidin) and direct (i.e. synthesis of QD-labelled FISH probes) detection methods. In general, the indirect experiments met with a degree of success, with FISH applications demonstrated for chromosome painting, BAC mapping and use of oligonucleotide probes on human and avian chromosomes/nuclei. Many of the reported properties of QDs (e.g. brightness, 'blinking' and resistance to photobleaching) were observed. On the other hand, signals were more frequently observed where the chromatin was less condensed (e.g. around the periphery of the chromosome or in the interphase nucleus) and significant bleed-through to other filters was apparent (despite the reported narrow emission spectra). Most importantly, experimental success was intermittent (sometimes even in identical, parallel experiments) making attempts to improve reliability difficult. Experimentation with direct labelling showed evidence of the generation of QD-DNA constructs but no successful FISH experiments. We conclude that QDs are not, in their current form, suitable materials for FISH because of the lack of reproducibility of the experiments; we speculate why this might be the case and look forward to the possibility of nanotechnology forming the basis of future molecular cytogenetic applications.

Authors : Ioannou Dimitris, Tempest Helen G, Skinner Benjamin M, Thornhill Alan R, Ellis Michael, Griffin Darren K,

(9) Influence of ADAM28 on biological characteristics of human dental follicle cells.[TOP]

Pubmed ID :19580958
Publication Date : //
The aim of this study was to investigate the effects of a disintegrin and metalloproteinase 28 (ADAM28) on the biological characteristics of human dental follicle cells (HDFCs) and possible action mechanism.

Authors : Zhao Zheng, Liu Hongchen, Jin Yan, Lingling E,

(10) [Parameters of specific antibody interaction with P-gp in T-cell leukemia Jurkat cells].[TOP]

Pubmed ID :19499709
Publication Date : //
Special features of Pgp expression evaluation by flow cytometry were investigated. Indexes of interaction of FITC-conjugated Becton Dickinson Pharmingen monoclonal antibodies to external Pgp epitope (clone 17F9) were analyzed depending on the cell concentration (400000 to 3000000 cells/ml) and the specific antibody concentration (5, 10 and 20 microl of the market product solution per 300 microl of the cell suspension).

Authors : Bogush T A, Dudko E A, Bogush E A, Baryshnikov A Iu,