Human IL-33 ELISA Kit (ab119547)
Key features and details
- Sensitivity: 0.2 pg/ml
- Range: 7.8 pg/ml - 500 pg/ml
- Sample type: Cell culture supernatant, Plasma, Serum
- Detection method: Colorimetric
- Assay type: Sandwich (quantitative)
- Reacts with: Human
Overview
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Product name
Human IL-33 ELISA Kit
See all IL-33 kits -
Detection method
Colorimetric -
Precision
Intra-assay Sample n Mean SD CV% Overall 4.7% Inter-assay Sample n Mean SD CV% Overall 6.9% -
Sample type
Cell culture supernatant, Serum, Plasma -
Assay type
Sandwich (quantitative) -
Sensitivity
0.2 pg/ml -
Range
7.8 pg/ml - 500 pg/ml -
Recovery
Sample specific recovery Sample type Average % Range Cell culture supernatant 73% - 92% Serum 67% - 79% -
Assay duration
Multiple steps standard assay -
Species reactivity
Reacts with: Human -
Product overview
Abcam’s IL-33 Human ELISA (Enzyme-Linked Immunosorbent Assay) kit is an in vitro enzyme-linked immunosorbent assay for the quantitative measurement of Human IL-33 in cell culture supernatant, serum, and plasma (citrate, heparin).
IL-33 specific antibodies have been precoated onto 96-well plates. Standards and test samples are added to the wells and then incubated at room temperature. After washing, a Biotin-conjugated anti-Human IL-33 detection antibody is added then incubated at room temperature. Following washing Streptavidin-HRP conjugate is added to each well, incubated at room temperature then again washed. TMB is added and then catalyzed by HRP to produce a blue color product that changes into yellow after addition of acidic stop solution. The density of yellow coloration is directly proportional to the amount of IL-33 captured on the plate.
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Platform
Microplate
Properties
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Storage instructions
Store at +4°C. Please refer to protocols. -
Components 1 x 96 tests 20X Assay Buffer Concentrate 1 x 5ml 20X Wash Buffer Concentrate 1 x 50ml Adhesive Films 6 units Biotin-Conjugate anti-human IL-33 polyclonal antibody 1 x 140µl Calibrator Diluent 1 x 5ml Conjugate Diluent 1 x 15ml IL-33 Standard lyophilized (500 pg/mL upon reconstitution) 2 vials Microplate coated with polyclonal antibody to IL-33 (12 x 8 wells) 1 unit Sample Diluent 1 x 12ml Stop Solution (1M Phosphoric acid) 1 x 15ml Streptavidin-HRP 1 x 150µl TMB Substrate Solution 1 x 15ml -
Research areas
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Function
Cytokine that binds to and signals through the IL1RL1/ST2 receptor which in turn activates NF-kappa-B and MAPK signaling pathways in target cells (PubMed:16286016). Involved in the maturation of Th2 cells inducing the secretion of T-helper type 2-associated cytokines. Also involved in activation of mast cells, basophils, eosinophils and natural killer cells. Acts as a chemoattractant for Th2 cells, and may function as an "alarmin", that amplifies immune responses during tissue injury (PubMed:17853410, PubMed:18836528).
In quiescent endothelia the uncleaved form is constitutively and abundantly expressed, and acts as a chromatin-associated nuclear factor with transcriptional repressor properties, it may sequester nuclear NF-kappaB/RELA, lowering expression of its targets (PubMed:21734074). This form is rapidely lost upon angiogenic or proinflammatory activation (PubMed:18787100). -
Tissue specificity
Expressed at high level in high endothelial venules found in tonsils, Peyer patches and mesenteric lymph nodes. Almost undetectable in placenta. -
Sequence similarities
Belongs to the IL-1 family. Highly divergent. -
Domain
The homeodomain-like HTH domain mediates nuclear localization and heterochromatin association. -
Post-translational
modificationsThe full length protein can be released from cells and is able to signal via the IL1RL1/ST2 receptor. However, proteolytic processing by CSTG/cathepsin G and ELANE/neutrophil elastase produces C-terminal peptides that are more active than the unprocessed full length protein. May also be proteolytically processed by calpains (PubMed:19596270). Proteolytic cleavage mediated by apoptotic caspases including CASP3 and CASP7 results in IL33 inactivation (PubMed:19559631). In vitro proteolytic cleavage by CASP1 was reported (PubMed:16286016) but could not be confirmed in vivo (PubMed:19465481) suggesting that IL33 is probably not a direct substrate for that caspase. -
Cellular localization
Nucleus. Chromosome. Cytoplasmic vesicle, secretory vesicle. Secreted. Associates with heterochromatin and mitotic chromosomes (PubMed:17185418). - Information by UniProt
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Alternative names
- C9orf26
- CHROMOSOME 9 OPEN READING FRAME 26
- DKFZp586H0523
see all -
Database links
- Entrez Gene: 90865 Human
- Omim: 608678 Human
- SwissProt: O95760 Human
- Unigene: 731660 Human
Images
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Typical Standard Curve
Representative Standard Curve using ab119547.
