Key Product Details

Validated by

Orthogonal Validation

Species Reactivity

Validated:

Human

Cited:

Human, Mouse, Transgenic Mouse

Applications

Validated:

Immunohistochemistry, Western Blot, ELISA Capture (Matched Antibody Pair), Neutralization, Dual RNAscope ISH-IHC Compatible, Immunocytochemistry

Cited:

Immunohistochemistry, Immunohistochemistry-Paraffin, Immunohistochemistry-Frozen, Western Blot, Neutralization, Immunofluorescence, Immunocytochemistry, Cell Culture, ELISA Capture, ELISA Development

Label

Unconjugated

Antibody Source

Polyclonal Goat IgG
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Product Specifications

Immunogen

E. coli-derived recombinant human IL-33
Ser112-Thr270
Accession # O95760

Specificity

Detects human IL-33 in ELISAs and Western blots. In sandwich ELISAs, less than 0.05% cross-reactivity with recombinant mouse (rm) IL‑33 is observed.

Clonality

Polyclonal

Host

Goat

Isotype

IgG

Endotoxin Level

<0.10 EU per 1 μg of the antibody by the LAL method.

Scientific Data Images for Human IL‑33 Antibody

Cell Proliferation Induced by IL‑33 and Neutralization by Human IL‑33 Antibody.

Cell Proliferation Induced by IL‑33 and Neutralization by Human IL‑33 Antibody.

Recombinant Human IL-33 (3625-IL) stimulates proliferation in the D10.G4.1 mouse helper T cell line in a dose-dependent manner (orange line). Under these conditions, proliferation elicited by Recombinant Human IL-33 (1 ng/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Human IL-33 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3625). The ND50 is typically ≤ 3.0 µg/mL.

IL-33 antibody in Human Tonsil by Immunohistochemistry (IHC-P).

IL‑33 in Human Tonsil.

IL-33 was detected in immersion fixed paraffin-embedded sections of human tonsil using Goat Anti-Human IL-33 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3625) at 10 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Goat HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS008) and counterstained with hematoxylin (blue). Specific staining was localized to nuclei. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

IL-33 antibody in Human Tonsil Using Dual RNAscope®ISH and IHC.

IL-33 in Human Tonsil Using Dual RNAscope®ISH and IHC.

IL-33 mRNA was detected in formalin-fixed paraffin-embedded tissue sections of human tonsil probed with ACD RNAScope®Probe (Catalog # 400111) and stained using ACD RNAscope®2.5 HD Detection Reagents-Red (top image, Catalog # 32260). Adjacent tissue section was processed for immunohistochemistry using R&D Systems Goat Anti-Human IL-33 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF3625) at 3 ug/mL with overnight incubation at 4 °C followed by incubation with the Anti-Goat IgG VisUCyte HRP Polymer Antibody (R&D Systems, Catalog # VC004) and DAB chromogen (lower image, yellow-brown). Tissues were counterstained with hematoxylin (blue).

Detection of IL-33 by Western Blot

Detection of IL-33 by Western Blot

IL-33 increases MMP-1 and MMP-13 expression in chondrocytes. (a–c) Dose-dependent expression of Mmp-1 (a), Mmp-13 (b), and type II collagen (c) induced by IL-33 in human chondrocytes. (d) Western blot of MMP-1, MMP-13, and type II collagen expression in human chondrocytes induced by different doses of IL-33. (e and f) Quantification of Mmp-1 (e) and Mmp-13 (f) expression in mouse cartilage tissues 24 or 48 h after IL-33 intra-articular injection. (g) Immunohistochemical analysis of type II collagen expression in mouse articular tissues 48 h after IL-33 intra-articular injection. (h) Safranin O staining of mouse articular tissues 48 h after IL-33 intra-articular injection. Scale bar represents 100 μm. **P<0.01 and ***P<0.001. P-values were analyzed by one-way ANOVA Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/29095435), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of IL-33 by Western Blot

Detection of IL-33 by Western Blot

RNAs released from injured osteoarthritic cartilages induce IL-33 expression in normal human chondrocytes. (a) TUNEL immunofluorescent staining in normal and osteoarthritic cartilage tissue slices. Scale bar represents 50 μm. (b) Western blot analysis of cleaved caspase-3 in normal and osteoarthritic cartilages. Samples from four OA patients were pooled together. (c) Western blot for IL-33, MMP-1, MMP-13, and type II collagen expression in normal human chondrocytes treated with the supernatants of osteoarthritic cartilage tissue homogenates. D-supernatant represents supernatant from damaged cartilage lysate. (d–g) Quantification of Il-33 (d), Mmp-1 (e), and Mmp-13 (f) and collagen II (g) expression in normal human chondrocytes induced by the supernatant of damaged cartilage lysate at different time points. (h) Western blot analysis for IL-33, MMP-1, and MMP-13 induced by the supernatant of osteoarthritic cartilage tissue homogenates in human chondrocytes pretreated with or without 5 μg/ml RNase A. D-supernatant represents supernatant from damaged cartilage lysate. (i–k) Quantification of Il-33 (i), Mmp-1 (j), and Mmp-13 (k) expression in normal human chondrocytes induced by the supernatant of osteoarthritic cartilage tissue homogenates in human chondrocytes pretreated with or without 5 μg/ml RNase A. D-supernatant represents supernatant from damaged cartilage lysate. **P<0.01 and ***P<0.001. P-values were analyzed by one-way ANOVA Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/29095435), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of IL-33 by Western Blot

Detection of IL-33 by Western Blot

dsRNA released from damaged cartilages activates TLR3 to induce IL-33 expression. (a–d) Quantification of Il-33 (b), Mmp-1 (c), and Mmp-13 (d) expression in normal human chondrocytes induced by the supernatant of osteoarthritic cartilage tissue homogenates in human chondrocytes transfected with or without Tlr3-siRNA. D-supernatant represents supernatant from damaged cartilage lysate. (e–h) Quantification of Il-33 (f), Mmp-1 (g), and Mmp-13 (h) expression in normal human chondrocytes induced by the supernatant of osteoarthritic cartilage tissue homogenates in human chondrocytes transfected with or without Tlr7 siRNA. D-supernatant represents supernatant from damaged cartilage lysate. (i–l) Quantification of Il-33 (i), Mmp-1 (j), Mmp-13 (k) and collagen II (l) expression in normal human chondrocytes induced by different doses of poly(I:C) for 24 h. (m) Western blot analysis of IL-33 and type II collagen in human chondrocytes induced by different doses of poly(I:C) for 24 h. *P<0.05, **P<0.01, and ***P<0.001. P-values were analyzed by one-way ANOVA Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/29095435), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of IL-33 by Western Blot

Detection of IL-33 by Western Blot

S. epidermidis reduces IL-33 production via suppression of RIPK3/MLKL-dependent necroptosis and is independent of apoptosis in allergic nasal epithelium. ARNE cells from four AR subjects were inoculated with human nasal commensal, S. epidermidis at a multiplicity of infection (MOI) of 0.25. The mRNA expression of IL-33 (A) was measured by real-time PCR, IL-33 protein concentration (B) secreted from ARNE cells was measured by ELISA using supernatants, and intracellular IL-33 protein expression (C) was also measured. after treatment of necroptosis inhibitors. Key molecules of necroptosis including RIPK3 (cropped blot) and MLKL and apoptosis including caspase3 were monitored by Western blot analysis (D). The mRNA expression of RIPK3 (E), and MLKL (F), and caspase3 (G) was measured by real-time PCR. Results are presented as mean ± SD values from four independent experiments. *p < 0.05 vs. mock-infected ARNE cells Image collected and cropped by CiteAb from the following open publication (https://bmcmicrobiol.biomedcentral.com/articles/10.1186/s12866-023-0289…), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of IL-33 by Western Blot

Detection of IL-33 by Western Blot

RNAs released from injured osteoarthritic cartilages induce IL-33 expression in normal human chondrocytes. (a) TUNEL immunofluorescent staining in normal and osteoarthritic cartilage tissue slices. Scale bar represents 50 μm. (b) Western blot analysis of cleaved caspase-3 in normal and osteoarthritic cartilages. Samples from four OA patients were pooled together. (c) Western blot for IL-33, MMP-1, MMP-13, and type II collagen expression in normal human chondrocytes treated with the supernatants of osteoarthritic cartilage tissue homogenates. D-supernatant represents supernatant from damaged cartilage lysate. (d–g) Quantification of Il-33 (d), Mmp-1 (e), and Mmp-13 (f) and collagen II (g) expression in normal human chondrocytes induced by the supernatant of damaged cartilage lysate at different time points. (h) Western blot analysis for IL-33, MMP-1, and MMP-13 induced by the supernatant of osteoarthritic cartilage tissue homogenates in human chondrocytes pretreated with or without 5 μg/ml RNase A. D-supernatant represents supernatant from damaged cartilage lysate. (i–k) Quantification of Il-33 (i), Mmp-1 (j), and Mmp-13 (k) expression in normal human chondrocytes induced by the supernatant of osteoarthritic cartilage tissue homogenates in human chondrocytes pretreated with or without 5 μg/ml RNase A. D-supernatant represents supernatant from damaged cartilage lysate. **P<0.01 and ***P<0.001. P-values were analyzed by one-way ANOVA Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/29095435), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of IL-33 by Western Blot

Detection of IL-33 by Western Blot

S. epidermidis reduces IL-33 production via suppression of RIPK3/MLKL-dependent necroptosis and is independent of apoptosis in allergic nasal epithelium. ARNE cells from four AR subjects were inoculated with human nasal commensal, S. epidermidis at a multiplicity of infection (MOI) of 0.25. The mRNA expression of IL-33 (A) was measured by real-time PCR, IL-33 protein concentration (B) secreted from ARNE cells was measured by ELISA using supernatants, and intracellular IL-33 protein expression (C) was also measured. after treatment of necroptosis inhibitors. Key molecules of necroptosis including RIPK3 (cropped blot) and MLKL and apoptosis including caspase3 were monitored by Western blot analysis (D). The mRNA expression of RIPK3 (E), and MLKL (F), and caspase3 (G) was measured by real-time PCR. Results are presented as mean ± SD values from four independent experiments. *p < 0.05 vs. mock-infected ARNE cells Image collected and cropped by CiteAb from the following open publication (https://bmcmicrobiol.biomedcentral.com/articles/10.1186/s12866-023-0289…), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of IL-33 by Western Blot

Detection of IL-33 by Western Blot

IL-33 expression is increased in the articular chondrocytes of osteoarthritic patients. (a–c) Quantification of Il-33 (a), Mmp-1 (b), and Mmp-13 (c) expression in articular tissues from normal and osteoarthritic patients. (d) Immunohistochemical analysis of IL-33 expression in articular tissue from normal and osteoarthritic patients. Scale bar represents 20 μm. (e–g) Quantification of IL-33 (e), MMP-1 (f), and MMP-13 (g) in normal and osteoarthritic cartilages detected by ELISA. (h) Western blot of IL-33 in normal and osteoarthritic cartilages. (i–k) Quantification of Il-33 (i), Mmp-1 (j), and Mmp-13 (k) expression in normal and osteoarthritic cartilages. (l–n) Quantification of IL-33 (l), MMP-1 (m), and MMP-13 (n) in synovial fluid of normal and osteoarthritic patients detected by ELISA. *P<0.05, **P<0.01, and ***P<0.001. P-values were analyzed by t-test Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/29095435), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of IL-33 by Western Blot

Detection of IL-33 by Western Blot

The effect of TGF beta on IL-33 expression by fibroblasts over time. Non-IPF (n = 5) and IPF (n = 5) HLFs were stimulated with 2 ng/ml of TGF beta for 4, 8 and 24 h and IL33 gene expression measured by qPCR. For each donor, all data was normalised to the unstimulated media alone control at 4 h (A). Non-IPF (n = 5) and IPF (n = 4) HLFs were stimulated with 2 ng/ml of TGF beta for 8 and 24 h, total protein isolated and 20 μg protein/lane separated by SDS-PAGE. IL-33 protein expression by non-IPF (B) and IPF (C) HLFs was assessed by western blot and quantified relative to alpha -Tubulin via densitometry (D). Representative cropped western blots from non-IPF and IPF donors are shown. Whole IL-33 blots for the representative non-IPF and IPF donors are viewable in Additional file 1: Figs. S2 and Fig. S3 respectively. IL-33 release from non-IPF (n = 3) and IPF (n = 3) HLFs treated with 2 ng /ml TGF beta for 4, 8 or 24 h was measured by ELISA. Recombinant IL-33 was titrated as a positive control (E) and analysed alongside neat HLF supernatants (F) Non-IPF and IPF donors shown in black and grey respectively. Bars indicate median values and each data point represents a single donor with statistical analysis performed by Wilcoxon signed-rank test Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/36949463), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of IL-33 by Western Blot

Detection of IL-33 by Western Blot

The effect of TGF beta on IL-33 expression by fibroblasts over time. Non-IPF (n = 5) and IPF (n = 5) HLFs were stimulated with 2 ng/ml of TGF beta for 4, 8 and 24 h and IL33 gene expression measured by qPCR. For each donor, all data was normalised to the unstimulated media alone control at 4 h (A). Non-IPF (n = 5) and IPF (n = 4) HLFs were stimulated with 2 ng/ml of TGF beta for 8 and 24 h, total protein isolated and 20 μg protein/lane separated by SDS-PAGE. IL-33 protein expression by non-IPF (B) and IPF (C) HLFs was assessed by western blot and quantified relative to alpha -Tubulin via densitometry (D). Representative cropped western blots from non-IPF and IPF donors are shown. Whole IL-33 blots for the representative non-IPF and IPF donors are viewable in Additional file 1: Figs. S2 and Fig. S3 respectively. IL-33 release from non-IPF (n = 3) and IPF (n = 3) HLFs treated with 2 ng /ml TGF beta for 4, 8 or 24 h was measured by ELISA. Recombinant IL-33 was titrated as a positive control (E) and analysed alongside neat HLF supernatants (F) Non-IPF and IPF donors shown in black and grey respectively. Bars indicate median values and each data point represents a single donor with statistical analysis performed by Wilcoxon signed-rank test Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/36949463), licensed under a CC-BY license. Not internally tested by R&D Systems.
Detection of IL-33 by Immunohistochemistry

Detection of IL-33 by Immunohistochemistry

IL‐3 is specifically expressed in astrocytes at 14 dpi. (A) Immunofluorescent staining of CD31 (green), IL‐3 (red), and nuclei (blue) in sagittal sections at 14 dpi. (B) Immunofluorescent staining of PDGFR beta (green), IL‐3 (red), and nuclei (blue) in sagittal sections at 14 dpi. (C) Immunofluorescent staining of CD68 (green), IL‐3 (red), and nuclei (blue) in sagittal sections at 14 dpi. (D) Immunofluorescent staining of NG2 (green), IL‐3 (red), and nuclei (blue) in sagittal sections at 14 dpi. (E) Immunofluorescent staining of GFAP (green), IL‐3 (red), and nuclei (blue) in sagittal sections at 14 dpi. The region of interest (ROI) represents the boxed region on the left. Asterisks indicate the injured core. Scale bars: 200 μm (left panel) and 20 μm (right panel). n = 3 animals per group. (F) Quantification of the proportion of IL‐3+CD31+ cells in CD31+ cells, IL‐3+PDGFR beta + cells in PDGFR beta + cells, IL‐3+CD68+ cells in CD68+ cells, IL‐3+NG2+ cells in NG2+ cells, or IL‐3+GFAP+ cells in GFAP+ cells at 14 dpi. ND, no determined, **p < 0.01; ****p < 0.001 by one‐way ANOVA followed by Tukey's post hoc test. Image collected and cropped by CiteAb from the following open publication (https://pubmed.ncbi.nlm.nih.gov/39697159), licensed under a CC-BY license. Not internally tested by R&D Systems.

Applications for Human IL‑33 Antibody

Application
Recommended Usage

Dual RNAscope ISH-IHC Compatible

3-25 µg/mL
Sample: Immersion fixed paraffin-embedded sections of human tonsil

Immunocytochemistry

5-15 µg/mL
Sample: Immersion fixed human peripheral blood mononuclear cells treated with PMA and calcium ionomycin

Immunohistochemistry

5-15 µg/mL
Sample: Immersion fixed paraffin-embedded sections of human tonsil

Western Blot

0.1 µg/mL
Sample: Recombinant Human IL‑33 (Catalog # 3625-IL)

Neutralization

Measured by its ability to neutralize IL‑33-induced proliferation in the D10.G4.1 mouse helper T cell line. The Neutralization Dose (ND50) is ≤ 3.0 ug/mL in the presence of 1 ng/mL Recombinant Human IL-33 (Catalog # 3625-IL).

Human IL-33 Sandwich Immunoassay

ELISA Capture (Matched Antibody Pair)
Recommended Concentration: 0.2-0.8 µg/mL
Use in combination with these reagents:
  • Detection Reagent: Human IL‑33 Biotinylated Antibody (Catalog # BAF3625)
  • Standard: Recombinant Human IL-33 Protein (Catalog # 3625-IL)
Please Note: Optimal dilutions of this antibody should be experimentally determined.

Reviewed Applications

Read 8 reviews rated 4.6 using AF3625 in the following applications:

Formulation, Preparation, and Storage

Purification

Antigen Affinity-purified

Reconstitution

Reconstitute at 0.2 mg/mL in sterile PBS. For liquid material, refer to CoA for concentration.


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Formulation

Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. See Certificate of Analysis for details.
*Small pack size (-SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.

Shipping

Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.

Stability & Storage

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.

Calculators

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: IL-33

IL-33, also known as NF-HEV and DVS 27, is a 30 kDa proinflammatory protein that may also regulate gene transcription (1‑3). DVS 27 was identifed as a gene that is up‑regulated in vasospastic cerebral arteries (1). NF-HEV was described as a nuclear factor that is preferentially expressed in the endothelial cells of high endothelial venules relative to endothelial cells from other tissues (2). IL-33 was identified based on sequence and structural homology with IL-1 family cytokines (3). DVS 27, NF-HEV, and IL-33 share 100% amino acid sequence identity. IL-33 is constitutively expressed in smooth muscle and airway epithelia. It is up‑regulated in arterial smooth muscle, dermal fibroblasts, and keratinocytes following IL-1 alpha or IL-1 beta stimulation (1, 3). Similar to IL-1, IL-33 can be cleaved in vitro by caspase-1, generating an N-terminal fragment that is slightly shorter than the C-terminal fragment (3, 4). The N-terminal portion of full length IL-33 contains a predicted bipartite nuclear localization sequence and a homeodomain-like helix-turn-helix DNA binding domain. By immunofluorescence, full length IL-33 localizes to the nucleus in HUVECs and transfectants (2). The C-terminal fragment, corresponding to mature IL-33, binds and triggers signaling through mast cell IL-1 R4/ST2L, a longtime orphan receptor involved in the augmentation of Th2 cell responses (3, 5-7). A ternary signaling complex is formed by the subsequent association of IL-33 and ST2L with IL-1R AcP (8). Stimulation of Th2 polarized lymphocytes with mature IL-33 in vitro induces IL-5 and IL-13 secretion (3). In vivo administration of mature IL-33 promotes increased production of IL-5, IL-13, IgE, and IgA, as well as splenomegaly and inflammatory infiltration of mucosal tissues (3). Full length and mature human IL-33 share 52‑58% aa sequence identity with mouse and rat IL-33. Human IL-33 shares less than 20% aa sequence identity with other IL-1 family proteins.

References

  1. Onda, H. et al. (1999) J. Cereb. Blood Flow Metab. 19:1279.
  2. Baekkevold, E.S. et al. (2003) Am. J. Pathol. 163:69.
  3. Schmitz, J. et al. (2005) Immunity 23:479.
  4. Black, R.A. et al. (1989) J. Biol. Chem. 264:5323.
  5. Xu, D. et al. (1998) J. Exp. Med. 187:787.
  6. Lohning, M. et al. (1998) Proc. Natl. Acad. Sci. USA 95:6930.
  7. Dinarello, C.A. (2005) Immunity 23:461.
  8. Chackerian, A.A. et al. (2007) J. Immunol. 179:2551.

Long Name

Interleukin 33

Alternate Names

C9orf26, DVS27, IL33, NF-HEV

Entrez Gene IDs

90865 (Human); 77125 (Mouse)

Gene Symbol

IL33

UniProt

Additional IL-33 Products

Product Documents for Human IL‑33 Antibody

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot or batch number in the search box below.

Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Human IL‑33 Antibody

For research use only

Citations for Human IL‑33 Antibody

Customer Reviews for Human IL‑33 Antibody (8)

4.6 out of 5
8 Customer Ratings
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Showing  1 - 5 of 8 reviews Showing All
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  • Human IL-33 Antibody
    Name: Anonymous
    Application: Western Blot
    Sample Tested: A549 human lung carcinoma cell line
    Species: Human
    Verified Customer | Posted 11/13/2024
    Human IL‑33 Antibody AF3625
  • Human IL-33 Antibody
    Name: Anonymous
    Application: Immunocytochemistry/Immunofluorescence
    Sample Tested: Aorta tissue
    Species: Human
    Verified Customer | Posted 07/25/2023
    Human IL‑33 Antibody AF3625
  • Human IL-33 Antibody
    Name: Anonymous
    Application: ELISA
    Sample Tested: Serum and Plasma
    Species: Human
    Verified Customer | Posted 06/09/2020
    We used this antibody in an in-house ELISA along with mAb (3625) and protein (3625-IL-010) to quantify IL-33 in human serum and plasma. This combination could not detect IL-33 in our samples but generated a good standard curve.
    Human IL‑33 Antibody AF3625
  • Human IL-33 Antibody
    Name: Anonymous
    Application: Immunocytochemistry/Immunofluorescence
    Sample Tested: BRONCHUS
    Species: Human
    Verified Customer | Posted 02/26/2019
    Staining was done on human airways after citrate antigen retrieval. OCT sections were used
    Human IL‑33 Antibody AF3625
  • Human IL-33 Antibody
    Name: Stephanie Zandee
    Application: Immunohistochemistry
    Sample Tested: Adult brain
    Species: Human
    Verified Customer | Posted 03/27/2018
    Published in https://www.ncbi.nlm.nih.gov/pubmed/28169287 Used at 10ug/ml. Briefly, frozen brain sections were fixed in 4% PFA (Fisher Scientific), followed by antigen retrieval using heating in acid citric buffer (Vector, Burlingame, CA, USA). Endogenous avidin-biotin was blocked for 15 min (Vector). Sections were incubated with 10% horse serum in PBS (Biosera, Boussens, France) and Fc Receptor Blocking Solution was added (Human TruStain FcX Biolegend, London, UK). Primary antibodies were added overnight at 4 °C. IL-33 was detected with donkey anti-goat-biotin (ab6578, Abcam), followed by streptavidin-HRP and visualised with DAB. Section was counterstained with Hematoxylin.
    Human IL‑33 Antibody AF3625
  • Human IL-33 Antibody
    Name: Anonymous
    Application: ELISA
    Sample Tested: Serum and Plasma
    Species: Human
    Verified Customer | Posted 11/09/2017
    AF3625 was used as both the capture and the detection antibody for the sandwich ELISA for IL-33. The immunoassay standard was 3625-IL. Assay had sensitivity of ~1pg/ml. Many healthy human samples were not detectable.
    Human IL‑33 Antibody AF3625
  • Human IL-33 Antibody
    Name: Anonymous
    Application: Immunocytochemistry/Immunofluorescence
    Sample Tested: Adult lung
    Species: Human
    Verified Customer | Posted 10/18/2016
    Human IL‑33 Antibody AF3625
  • Name: Anonymous
    Application: Immunocytochemistry
    Sample Tested: See PMID 23172891
    Species: Human
    Verified Customer | Posted 01/08/2015

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Protocols

Find general support by application which include: protocols, troubleshooting, illustrated assays, videos and webinars.

FAQs for Human IL‑33 Antibody

Showing  1 - 1 of 1 FAQ Showing All
  • Q: Does the Human IL-33 Antibody, Catalog # AF3625, detect full length IL-33 or the cleaved forms?

    A: The immunogen sequence that this antibody recognizes is Ser112-Thr270 from Accession # O95760. This seqeunce corresponds to the cleaved form and is included in the full length sequence. Therefore, we would expect that this antibody detects both the full length and cleaved forms.

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