SILu^™Prot IL8, Interleukin-8 human

SILu^™Prot IL8 is a recombinant, stable isotope-labeled human CXCL8 which incorporates [¹³C₆, ¹⁵N₄]-Arginine and [¹³C₆, ¹⁵N₂]-Lysine. Expressed in human 293 cells, it is designed to be used as an internal standard for bioanalysis of CXCL8 in mass-spectrometry. SILu^™Prot IL8 is a mixture of the 3 main CXCL8 isoforms with the molecular weights, amino acid number and relative abundance as described in Table 1 of the product′s datasheet.

Interleukin-8 (IL-8) is a member of the CXC chemokine subfamily and is produced by blood cells and many types of tissues. The measurement of IL-8 in voided urinary samples may have utility for urine-based detection of bladder cancer. Urinary IL-8 was a strong biomarker of stress under intensive and prolonged demands, both acutely and over time. IL-8 and cathepsin B levels were significantly elevated in melanoma patients, and more importantly, the combination of IL-8 and cathepsin B were also studied as a prognosis marker for melanoma mortality.

Supplied as a lyophilized powder containing phosphate buffered saline.

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This product is licensed under U.S. Patent No. 7,396,688 and foreign counterparts from E. I. du Pont de Nemours and Company. The purchase of this product conveys to the buyer the nontransferable right to use the purchased amount of the product for research and development only, including services for a third party for consideration. The buyer cannot sell or otherwise transfer this product, its components or materials made using this product or its components to a third party. Information about licenses for excluded uses is available from: E. I. du Pont de Nemours and Company; Attn: Associate Director, Commercial Development; DuPont Experimental Station E268; 200 Powdermill Rd.; Wilmington, DE 19803; 1-877-881-9787 (voice), 1-302-695-1437 (fax), licensing@dupont.com.

SILu is a trademark of Sigma-Aldrich Co. LLC