Human Latent TGF-beta 1 ELISpot Kit
Human Latent TGF-beta 1 ELISpot Kit Summary
* Provided that the recommended microplates, buffers, diluents, substrates and solutions are used, and the assay is run as summarized in the Assay Procedure provided.
PRODUCT SUMMARY
ELISpot kits are highly sensitive, microplate-based assays for the detection of cytokine secreting cells. This kit is designed for the detection and enumeration of human TGF-beta 1. Complete ELISpot kits are ready-to-run and require no assay development or refinement.
This ELISpot assay employs a capture antibody specific for human TGF-beta 1, pre-coated onto a PVDF-backed microplate. Appropriately stimulated cells are pipetted directly into the wells and the immobilized antibody in the immediate vicinity of the secreting cells binds secreted human TGF-beta 1. Following wash steps and incubation with a biotinylated detection antibody, alkaline-phosphatase conjugated to streptavidin is added. Unbound enzyme is subsequently removed by washing and a substrate solution (BCIP/NBT) is added. A blue-black colored precipitate forms at the sites of cytokine localization and appears as spots, with each individual spot representing an individual human TGF-beta 1 secreting cell. The spots can be counted with an automated ELISpot reader system or manually using a stereomicroscope.
PRODUCT FEATURES
- Detect and quantitate individual cells secreting human TGF-beta 1
- High sensitivity - ELISpot assays can measure responses with frequencies well below 1 in 100,000 cells
- No in vitro expansion of cells required
- High-throughput - ELISpot assays use only a small number of primary cells
KIT CONTENTS
- Human TGF-beta 1 Microplate
- Biotinylated Detection Antibody
- Streptavidin conjugated to Alkaline Phosphatase
- Dilution Buffers
- Wash Buffer Concentrate
- BCIP/NBT Chromogen
- Human TGF-beta 1 Positive Control
OTHER REAGENTS REQUIRED
- Pipettes and pipette tips
- Deionized or distilled water
- Squirt bottle, manifold dispenser, or automated microplate washer
- 500 mL graduated cylinder
- 37 °C CO2 incubator
- Sterile culture media
- Dissection microscope or an automated ELISpot reader
Product Datasheets
Preparation and Storage
Background: TGF-beta 1
Transforming Growth Factor Beta 1, 2, and 3 (TGF-beta 1, TGF-beta 2, and TGF-beta 3) are highly pleiotropic cytokines that virtually all cell types secrete. TGF-beta molecules are proposed to act as cellular switches that regulate processes such as immune function, proliferation, and epithelial-mesenchymal transition. Targeted deletions of these genes in mice show that each TGF-beta isoform has some non-redundant functions: TGF-beta 1 is involved in hematopoiesis and endothelial differentiation; TGF-beta 2 affects development of cardiac, lung, craniofacial, limb, eye, ear, and urogenital systems; and TGF-beta 3 influences palatogenesis and pulmonary development. The full range of in vitro biological activities of TGF-beta 5 has not yet been explored. However, TGF-beta 1, TGF-beta 2, TGF-beta 3, and TGF-beta 5 have been found to be largely interchangeable in an inhibitory bioassay, and it is anticipated that TGF-beta 5 will show a spectrum of activities similar to the other TGF-beta family members. To date, the production of TGF-beta 5 has only been demonstrated in Xenopus.
TGF-beta ligands are initially synthesized as precursor proteins that undergo proteolytic cleavage. The mature segments form active ligand dimers via a disulfide-rich core consisting of the characteristic 'cysteine knot'. TGF-beta signaling begins with binding to a complex of the accessory receptor betaglycan (also known as TGF-beta RIII) and a type II serine/threonine kinase receptor termed TGF-beta RII. This receptor then phosphorylates and activates a type I serine/threonine kinase receptor, either ALK-1 or TGF-beta RI (also called ALK-5). The activated type I receptor phosphorylates and activates Smad proteins that regulate transcription. Use of other signaling pathways that are Smad-independent allows for distinct actions observed in response to TGF-beta in different contexts.
Citations for Human Latent TGF-beta 1 ELISpot Kit
R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.
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Citations: Showing 1 - 2
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Contribution of endotoxin to Th17 bias in patients with non-alcoholic steatohepatitis
Authors: X Wang, D Ji, B Zhu, S Jiang, L Han, Y Wang, H Mai, S Xu, H Jiang, G Wang, Y Rong
Microb. Pathog., 2020;0(0):104009.
Species: Human
Sample Types: Whole Cells
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Induction of latency-associated peptide (transforming growth factor-beta(1)) expression on CD4+ T cells reduces Toll-like receptor 4 ligand-induced tumour necrosis factor-alpha production in a transforming growth factor-beta-dependent manner.
Authors: Boswell S, Sharif S, Alisa A, Pereira SP, Williams R, Behboudi S
Immunology, 2011;133(3):278-87.
Species: Human
Sample Types: Whole Cells
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