Recombinant Porcine TNF-alpha Protein, CF

Formulations:
Catalog # Availability Size / Price Qty
690-PT-025/CF
Product Details
Citations (7)
FAQs
Reviews

Recombinant Porcine TNF-alpha Protein, CF Summary

Purity
>97%, 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 in a cytotoxicity assay using TNF-susceptible PK‑15 porcine kidney epithelial cells in the presence of the metabolic inhibitor actinomycin D. Matthews, N. and M.L. Neale (1987) in Lymphokines and Interferons, A Practical Approach. Clemens, M.J. et al. (eds): IRL Press. 221; Bertoni et al. (1993) J. Immunol. Meth. 160:267. The ED50 for this effect is 0.003-0.018 ng/mL.
Source
E. coli-derived porcine TNF-alpha protein
Arg78-Leu232, with an N-terminal Met
Accession #
N-terminal Sequence
Analysis
Met
Predicted Molecular Mass
17 kDa

Product Datasheets

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.

690-PT/CF

Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 100 μg/mL in sterile 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.

690-PT

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Reconstitution Reconstitute at 100 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.
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.
Reconstitution Calculator

Reconstitution Calculator

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: TNF-alpha

Tumor necrosis factor alpha (TNF-alpha ), also known as cachectin and TNFSF2, is the prototypic ligand of the TNF superfamily. It is a pleiotropic molecule that plays a central role in inflammation, immune system development, apoptosis, and lipid metabolism (1, 2). Porcine TNF-alpha consisits of a 35 amino acid (aa) cytoplasmic domain, a 21 aa transmembrane segment, and a 176 aa extracellular domain (ECD) (3). Within the ECD, porcine TNF-alpha shares 69%-86% aa sequence identity with bovine, canine, cotton rat, equine, feline, human, mouse, rat, and rhesus TNF-alpha. TNF-alpha is produced by a wide variety of immune, epithelial, endothelial, and tumor cells (1, 2). TNF-alpha is assembled intracellularly to form a noncovalently linked homotrimer which is expressed on the cell surface (4). Cell surface TNF-alpha can induce the lysis of neighboring tumor cells and virus infected cells, and it can generate its own downstream cell signaling following ligation by soluble TNFR I (2, 5). Shedding of membrane bound TNF-alpha by TACE/ADAM17 releases the bioactive cytokine, a 55 kDa soluble trimer of the TNF-alpha extracellular domain (6-8). TNF-alpha binds the ubiquitous 55-60 kDa TNF RI (9, 10) and the hematopoietic cell-restricted 80 kDa TNF RII (11, 12), both of which are also expressed as homotrimers (1, 2, 13). Both type I and type II receptors bind TNF-alpha with comparable affinity (14), although only TNF RI contains a cytoplasmic death domain which triggers the activation of apoptosis. Soluble forms of both types of receptors are released and can neutralize the biological activity of TNF-alpha (15).

References
  1. Zelova, H. and J. Hosek (2013) Inflamm. Res. 62:641.
  2. Juhasz, K. et al. (2013) Expert Rev. Clin. Immunol. 9:335.
  3. Pauli, U. et al. (1989) Gene 81:185.
  4. Tang, P. et al. (1996) Biochemistry 35:8216.
  5. Perez, C. et al. (1990) Cell 63:251.
  6. Black, R.A. et al. (1997) Nature 385:729.
  7. Moss, M.L. et al. (1997) Nature 385:733.
  8. Gearing, A.J.H. et al. (1994) Nature 370:555.
  9. Schall, T.J. et al. (1990) Cell 61:361.
  10. Loetscher, H. et al. (1990) Cell 61:351.
  11. Dembic, Z. et al. (1990) Cytokine 2:231.
  12. Smith, C.A. et al. (1990) Science 248:1019.
  13. Loetscher, H. et al. (1991) J. Biol. Chem. 266:18324.
  14. Pinckard, J.K. et al. (1997) J. Biol. Chem. 272:10784.
  15. Engelmann, H. et al. (1990) J. Biol. Chem. 265:1531.
Long Name
Tumor Necrosis Factor alpha
Entrez Gene IDs
7124 (Human); 21926 (Mouse); 24835 (Rat); 397086 (Porcine); 280943 (Bovine); 403922 (Canine); 100033834 (Equine); 493755 (Feline); 100009088 (Rabbit)
Alternate Names
APC1 protein; Cachectin; Cachetin; DIF; TNF; TNF, monocyte-derived; TNFA; TNF-A; TNFalpha; TNF-alpha; TNF-alphacachectin; TNFATNF, macrophage-derived; TNFG1F; TNFSF1A; TNFSF2; TNFSF2TNF superfamily, member 2; tumor necrosis factor (TNF superfamily, member 2); tumor necrosis factor alpha; Tumor necrosis factor ligand superfamily member 2; tumor necrosis factor; tumor necrosis factor-alpha

Citations for Recombinant Porcine TNF-alpha 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.

7 Citations: Showing 1 - 7
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  1. Infection of monocytes with European porcine reproductive and respiratory syndrome virus (PRRSV-1) strain Lena is significantly enhanced by dexamethasone and IL-10
    Authors: H Singleton, SP Graham, JP Frossard, KB Bodman-Smi, F Steinbach
    Virology, 2018;0(0):.
    Species: Porcine
    Sample Types: Whole Cells
    Applications: Bioassay
  2. Interaction of porcine monocyte-derived dendritic cells with African swine fever viruses of diverse virulence
    Authors: G Franzoni, SP Graham, G Sanna, P Angioi, MS Fiori, A Anfossi, M Amadori, S Dei Giudic, A Oggiano
    Vet. Microbiol., 2018;216(0):190-197.
    Species: Porcine
    Sample Types: Cell Culture Supernates
    Applications: Activation
  3. Elevated fibroblast growth factor-2 increases tumor necrosis factor-alpha induced endothelial cell death in high glucose.
    Authors: Clyne AM, Zhu H, Edelman ER
    J. Cell. Physiol., 2008;217(1):86-92.
    Species: Porcine
    Sample Types: Whole Cells
    Applications: Bioassay
  4. Enhanced integrative repair of the porcine meniscus in vitro by inhibition of interleukin-1 or tumor necrosis factor alpha.
    Authors: McNulty AL, Moutos FT, Weinberg JB, Guilak F
    Arthritis Rheum., 2007;56(9):3033-42.
    Species: Porcine
    Sample Types: Whole Tissue
    Applications: Bioassay
  5. Simultaneous detection of porcine proinflammatory cytokines using multiplex flow cytometry by the xMAP technology.
    Authors: Johannisson A, Jonasson R, Dernfalk J, Jensen-Waern M
    Cytometry A, 2006;69(5):391-5.
    Species: N/A
    Sample Types: N/A
    Applications: ELISA (Standard)
  6. Cytokine responses in gnotobiotic pigs after infection with virulent or attenuated human rotavirus.
    Authors: Azevedo MS, Yuan L, Pouly S, Gonzales AM, Jeong KI, Nguyen TV, Saif LJ
    J. Virol., 2006;80(1):372-82.
    Species: N/A
    Sample Types: N/A
    Applications: ELISA (Standard)
  7. The NS1 gene of H5N1 influenza viruses circumvents the host anti-viral cytokine responses.
    Authors: Seo SH, Hoffmann E, Webster RG
    Virus Res., 2004;103(1):107-13.
    Species: Porcine
    Sample Types: Whole Cells
    Applications: Bioassay

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