Recombinant Human Endostatin Protein, CF

Catalog # Availability Size / Price Qty
1098-ES-050
R&D Systems Recombinant Proteins and Enzymes
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Recombinant Human Endostatin Protein, CF Summary

Product Specifications

Purity
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Level
<0.01 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its ability to inhibit the FGF basic-dependent proliferation of HUVEC human umbilical vein endothelial cells. Dhanabal, M. et al. (1999) Biochem. Biophys. Res. Commun. 258:345. The ED50 for this effect is 0.4-2 μg/mL in the presence of 20 μg/mL of Goat Anti-Human Endostatin Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1098).
Source
E. coli-derived human Endostatin protein
His1154-Ser1335, with an N-terminal Met and 8-His tag
Accession #
N-terminal Sequence
Analysis
Met-His tag
Structure / Form
Monomer
Predicted Molecular Mass
21.6 kDa
SDS-PAGE
21 kDa, reducing conditions

Product Datasheets

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1098-ES

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

1098-ES

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 200 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it 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.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
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Background: Endostatin

Endostatin, an endogenous non‑glycosylated inhibitor of endothelial cell proliferation and angiogenesis, is an approximately 181 amino acid (aa), 20 kDa proteolytic fragment of the C‑terminal non‑collagenous domain of type XVIII collagen (1, 2). It is produced and/or trimmed by metalloproteinases such as MMP‑2 and MMP‑9, and cathepsins S, B and L (3, 4). The N‑terminal ~27 aa of Endostatin appear to contain the majority of its activity (4, 5). This region contains three zinc binding sites that are thought to be critical for its anti‑endothelial and anti‑tumor effects, as well as multiple cleavage sites that, when used, can modify its activity (4, 5). Human Endostatin shares 84‑87% aa sequence identity with mouse, rat, bovine and equine Endostatin. Endostatin inhibits endothelial cell growth by inducing cell cycle arrest in G1 phase and initiating apoptosis (1, 2). It is also thought to down‑regulate angiogenesis by blocking VEGF‑induced endothelial cell migration (6, 7). It alters the effect of FGF basic on adhesion and cell motility (8). Endostatin can interact with Transglutaminase 2, heparin, and integrins alpha 5 beta 1 and alpha v beta 3, all of which may be secreted by, or expressed on, endothelial cells, and can influence adhesion or migration (9, 10). Endostatin may also be involved with down‑regulation of angiogenesis after establishment of placental circulation in the pregnant uterus (11). Over‑expression in keratinocytes causes delay in healing of excisional wounds, while exogenous systemic Endostatin promotes endothelial and smooth muscle nitric oxide production and decreases blood pressure (12, 13). Since tumor growth and metastasis relies on angiogenesis to provide blood supply, Endostatin is inhibitory for a wide variety of primary and metastatic tumors (5‑8).

References
  1. Dhanabal, M. et al. (1999) Biochem. Biophys. Res. Commun. 10:345.
  2. O’Reilly, M.S. et al. (1997) Cell 88:277.
  3. Nilsson, U.W. et al. (2006) Cancer Res. 66:4789.
  4. Veillard, F. et al. (2011) J. Biol. Chem. 286:37158.
  5. Folkman, J. (2006) Exp. Cell Res. 312:594.
  6. Yamaguchi, N. et al. (2001) EMBO J. 18:4414.
  7. Ling, Y. et al. (2007) Biochem. Biophys. Res. Commun. 361:79.
  8. Dixelius, J. et al. (2002) Cancer Res. 62:1944.
  9. Faye, C. et al. (2010) Biochem. J. 427:467.
  10. Rehn, M. et al. (2001) Proc. Natl. Acad. Sci. USA 98:1024.
  11. Pollheimer, J. et al. (2011) Endocrinol. 152:4431.
  12. Seppinen, L. et al. (2008) Matrix Biol. 27:535.
  13. Sunshine, S.B. et al. (2012) Proc. Natl. Acad. Sci. USA 109:11306.
Entrez Gene IDs
80781 (Human); 12822 (Mouse)
Alternate Names
antiangiogenic agent; COL18A1; collagen alpha-1(XVIII) chain; collagen, type XVIII, alpha 1; Endostatin; FLJ27325; FLJ34914; human type XVIII collagen10endostatin; KNO; KNO1MGC74745; Knobloch syndrome, type 1; KS; multi-functional protein MFP

Citations for Recombinant Human Endostatin Protein, CF

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.

2 Citations: Showing 1 - 2
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  1. Endostatin in 3D Fibrin Hydrogel Scaffolds Promotes Chondrogenic Differentiation in Swine Neonatal Meniscal Cells
    Authors: VR Herrera Mi, B Canciani, L Mangiavini, JFS Filipe, L Aidos, M Pallaoro, GM Peretti, P Pocar, SC Modina, A Di Giancam
    Biomedicines, 2022-09-27;10(10):.
    Species: Porcine
    Sample Types: Whole Cells
    Applications: Bioassay
  2. Collagen 18 and agrin are secreted by enteric neural crest cells to remodel their microenvironment and regulate their migration during ENS development
    Authors: N Nagy, C Barad, R Hotta, S Bhave, E Arciero, D Dora, AM Goldstein
    Development, 2018-05-08;0(0):.
    Species: Chicken
    Sample Types: Whole Cells
    Applications: Bioassay

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