Angiopoietin-2 Antibody [Unconjugated]

Western blot shows lysates of HepG2 human hepatocellular carcinoma cell line. PVDF Membrane was probed with 1 µg/mL of Goat Anti-Human Angiopoietin‑2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF623) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF019). A specific band was detected for Angiopoietin‑2 at approximately 65 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Angiopoietin‑2 was detected in immersion fixed paraffin-embedded sections of human liver cancer tissue using Goat Anti-Human Angiopoietin‑2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF623) at 3 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 cytoplasm in cancer cells. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

Angiopoietin‑2 was detected in immersion fixed paraffin-embedded sections of human gastrointestinal cancer tissue using 15 µg/mL Goat Anti-Human Angiopoietin‑2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF623) overnight at 4 °C. Tissue was stained with the Anti-Goat HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS008) and counterstained with hematoxylin (blue). Lower panel shows a lack of labeling if primary antibodies are omitted and tissue is stained only with secondary antibody followed by incubation with detection reagents. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.

• Reactivity: Hu
• Applications: WB, IHC
• Clonality: Polyclonal
• Host: Goat
• Conjugate: Unconjugated
• Concentration: LYOPH

Angiopoietin-2 Antibody [Unconjugated] Summary

• Immunogen: Mouse myeloma cell line NS0-derived recombinant human Angiopoietin-2
  Asp68-Phe496
  Accession # O15123
• Specificity: Detects human Angiopoietin-2 in direct ELISAs and Western blots. In direct ELISAs, 100% cross-reactivity with recombinant mouse Angiopoietin-2 is observed and less than 5% cross-reactivity with recombinant human Angiopoietin-1 is observed.
• Source: N/A
• Isotype: IgG
• Clonality: Polyclonal
• Host: Goat
• Gene: ANGPT2
• Endotoxin Note: <0.10 EU per 1 μg of the antibody by the LAL method.

Applications/Dilutions

• Dilutions:
  • Western Blot 1 ug/mL
  • Immunohistochemistry 5-15 ug/mL

Packaging, Storage & Formulations

• 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.
• Buffer: Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
• Preservative: No Preservative
• Concentration: LYOPH
• Reconstitution Instructions: Reconstitute at 0.2 mg/mL in sterile PBS.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Angiopoietin-2 Antibody [Unconjugated]

• AGPT2
• ANG2
• ANG-2
• angiopoietin 2
• Angiopoietin-2
• angiopoietin-2a
• angiopoietin-2B
• angiopoitin 2
• ANGPT2
• Tie2-ligand

Background

Angiopoietin-2 (Ang-2; also ANGPT2) is a secreted glycoprotein that plays a complex role in angiogenesis and inflammation. Mature Ang-2 is 478 amino acids (aa) in length. It contains one coiled-coil domain (aa 166-248) that mediates multimerization, and a C-terminal fibrinogen-like domain (aa 275-495) that mediates receptor binding. Under reducing conditions, secreted monomeric Ang-2 is 65-66 kDa in size. Under nonreducing conditions, both natural and recombinant Ang-2 form 140 kDa dimers, 200 kDa trimers, and 250-300 kDa tetramers and pentamers. Alternate splicing generates a short isoform that lacks 52 amino acids (aa) preceding the coiled-coil domain. Mature human Ang-2 shares 86% aa sequence identity with mouse and rat Ang-2. Ang-2 is widely expressed during development, but it is restricted postnatally to highly angiogenic tissues such as the placenta, ovaries, and uterus. It is particularly abundant in vascular endothelial cells (EC) where it is stored in intracellular Weibel-Palade bodies. Both Ang-2 and the related Angiopoietin-1 (Ang-1) are ligands for the receptor tyrosine kinase Tie-2. While Ang-1 is a potent Tie-2 agonist, Ang-2 may act as either a Tie-2 antagonist or agonist, depending upon its state of multimerization. The higher the order of oligomer, the more effective Ang-2 becomes as a Tie-2 agonist. The short isoform appears to block the binding of either Ang-1 or full-length Ang-2 to Tie-2. Ang-2 functions as a pro-angiogenic factor, although it can also induce EC death and vessel regression. Upon its release from quiescent EC, it regulates vascular remodeling by promoting EC survival, proliferation, and migration and destabilizing the interaction between EC and perivascular cells. Ang-2 is required for postnatal vascular remodeling, and it cooperates with Ang-1 during lymphatic vessel development. It mediates the upregulation of ICAM-1 and VCAM-1 on EC, which facilitates the adhesion of leukocytes during inflammation. Ang-2 is upregulated in both the endothelium and tumor cells of several cancers as well as in ischemic tissue. Its direct interaction with Integrins promotes tumor cell invasion. Ang-2 also promotes the neuronal differentiation and migration of subventricular zone progenitor cells.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Publications for Angiopoietin-2 Antibody (AF623)(10)

Publications using AF623

• CY Lin, CF Cho, ST Bai, JP Liu, TT Kuo, LJ Wang, YS Lin, CC Lin, LC Lai, TP Lu, CY Hsieh, CN Chu, DC Cheng, YP Sher ADAM9 promotes lung cancer progression through vascular remodeling by VEGFA, ANGPT2, and PLAT Sci Rep, 2017;7(1):15108. 2017 [PMID: 29118335]
• J Retzlaff, K Thamm, CC Ghosh, W Ziegler, H Haller, SM Parikh, S David Flunarizine suppresses endothelial Angiopoietin-2 in a calcium - dependent fashion in sepsis Sci Rep, 2017;7(0):44113. 2017 [PMID: 28276491] (Western Blot, Human)
• Jenny Zhou H, Qin L, Zhang H, Tang W, Ji W, He Y, Liang X, Wang Z, Yuan Q, Vortmeyer A, Toomre D, Fuh G, Yan M, Kluger M, Wu D, Min W Endothelial exocytosis of angiopoietin-2 resulting from CCM3 deficiency contributes to cerebral cavernous malformation. Nat Med, 0;22(9):1033-1042. 0 [PMID: 27548575] (Western Blot, Human)
• J Rautiola, A Lampinen, T Mirtti, A Ristimäki, H Joensuu, P Bono, P Saharinen Association of Angiopoietin-2 and Ki-67 Expression with Vascular Density and Sunitinib Response in Metastatic Renal Cell Carcinoma PLoS ONE, 2016;11(4):e0153745. 2016 [PMID: 27100185] (IHC-P, Human)
• Hakanpaa L, Sipila T, Leppanen V, Gautam P, Nurmi H, Jacquemet G, Eklund L, Ivaska J, Alitalo K, Saharinen P Endothelial destabilization by angiopoietin-2 via integrin beta1 activation. Nat Commun, 2015;6(0):5962. 2015 [PMID: 25635707] (ICC, Human)
• Voigtlander T, David S, Thamm K, Schlue J, Metzger J, Manns M, Lankisch T Angiopoietin-2 and biliary diseases: elevated serum, but not bile levels are associated with cholangiocarcinoma. PLoS ONE, 2014;9(5):e97046. 2014 [PMID: 24823366] (IHC, Human)
• Boyer-Di Ponio J, El-Ayoubi F, Glacial F, Ganeshamoorthy K, Driancourt C, Godet M, Perriere N, Guillevic O, Couraud P, Uzan G Instruction of circulating endothelial progenitors in vitro towards specialized blood-brain barrier and arterial phenotypes. PLoS ONE, 2014;9(1):e84179. 2014 [PMID: 24392113] (ICC, Human)
• Ju, Rong, Zhuang, Zhen W, Zhang, Jiasheng, Lanahan, Anthony, Kyriakides, Themis, Sessa, William, Simons, Michael Angiopoietin-2 secretion by endothelial cell exosomes: regulation by the phosphatidylinositol 3-kinase (PI3K)/Akt/endothelial nitric oxide synthase (eNOS) and syndecan-4/syntenin pathways. J Biol Chem, 2014;289(1):510-9. 2014 [PMID: 24235146] (Western Blot, Human)
• Ohlmann A, Seitz R, Braunger B, Seitz D, Bosl MR, Tamm ER Norrin promotes vascular regrowth after oxygen-induced retinal vessel loss and suppresses retinopathy in mice. J. Neurosci., 2010;30(1):183-93. 2010 [PMID: 20053900] (Western Blot, Human)
• Helfrich I, Edler L, Sucker A, Thomas M, Christian S, Schadendorf D, Augustin HG Angiopoietin-2 levels are associated with disease progression in metastatic malignant melanoma. Clin. Cancer Res., 2009;15(4):1384-92. 2009 [PMID: 19228739] (ICC, Human)

Review for Angiopoietin-2 Antibody (AF623) (1)

Average Rating: 3

(Based on 1 review)

We have 1 review tested in 1 species: Mouse.

reviewed by: Anonymous WB Mouse 01/09/2015

Summary

• Application: Western Blot
• Sample Tested: See PMID 22203053
• Species: Mouse

Blocking

• Blocking Details: See PMID 22203053

Details

• Detection Notes: See PMID 22203053

Comments

• Comments: Published:See PMID 22203053Independent review from antibodyresource.com

Bioinformatics

• Gene Symbol: ANGPT2
• Uniprot:
  • O15123()