654205-M

TNF-α, Human, Recombinant, E. coli

• Synonym(s): TNF-α, Human, Recombinant, E. coli, rhTNF-α, rh-Cachectin, Tumor Necrosis Factor-α
• CAS Number: 94948-59-1
• MDL number: MFCD00148692

Properties

• recombinant: expressed in E. coli
• Quality Level: 100
• Assay: ≥95% (SDS-PAGE)
• form: lyophilized
• manufacturer/tradename: Calbiochem^®
• storage condition: OK to freeze
• impurities: ≤0.1 ng/μg Endotoxin (ng/μg TNF-α)
• storage temp.: −70°C

Description

General description

Recombinant, human tumor necrosis factor-α expressed in E. coli. A cytokine produced primarily by activated macrophages that activates a variety of immune defense mechanisms by interactions with polymorphonuclear leukocytes, T cells, antibody-producing B lymphocytes, fibroblasts, and hematopoietic bone marrow cells. Activity is not species-specific. Induces apoptosis in human blood and bone marrow neutrophils and in endothelial cells. Increases the iNOS levels in vascular smooth muscle cells. Involved in pathophysiological processes of several chronic and acute diseases. Stimulates stress activated protein kinase (SAPK).

Recombinant, human tumor necrosis factor-α expressed in E. coli. Activates a variety of immune defense mechanisms by interactions with polymorphonuclear leukocytes, T cells, antibody-producing B lymphocytes, fibroblasts, and hematopoietic bone marrow cells. Activity is not species-specific. Induces apoptosis in human blood and bone marrow neutrophils and in endothelial cells. Increases the iNOS levels in vascular smooth muscle cells. Involved in pathophysiological processes of several chronic and acute diseases. Stimulates stress activated protein (SAP) kinase.

Biochem/physiol Actions

ED₅₀ = 20-50 pg/ml as measured in a cytotoxicity assay with the TNF-α-susceptible murine L-929 cell line in the presence of Actinomycin D (Cat. No. 114666)

Warning

Toxicity: Standard Handling (A)

Reconstitution

Following reconstitution, aliquot and freeze (-20°C or -70°C) for long-term storage or refrigerate (4°C) for short-term storage. Avoid freeze/thaw cycles of solutions. Stock solutions are stable for up to 3 months at -20°C or -70°C or up to 1 month at 4°C.

Reconstitute with sterile, dH₂O to a final concentration of 0.1-1 mg/ml. Further dilutions should be made in low endotoxin medium or aqueous buffer containing carrier protein such as heat inactivated FCS or tissue culture grade BSA.

Other Notes

Merck Index 13, 9882.
Tsuchida, H., et al. 1995. J. Immunol. 154, 2403.
Westwick, J.K., et al. 1995. J. Biol. Chem. 270, 22689.
Polunovsky, V.A., et al. 1994. Exp. Cell Res.214, 584.
Koide, M., et al. 1993. FEBS Lett.318, 213.
Vilcek, J., and Lee, T.H. 1991. J. Biol. Chem.266, 7313.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class Code: 12 - Non Combustible Liquids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable