Interleukin 8 (IL8 or chemokine (C-X-C motif) ligand 8, CXCL8) is a chemokine produced by macrophages and other cell types such as epithelial cells, airway smooth muscle cells and endothelial cells. Thus, chemotaxis assay used 24-well microchemotaxis system was undertaken to detect the chemotactic effect of IL8 on the human T-lymphocyte leukemia cell line Jurkat. Briefly, Jurkat cells were
seeded into the upper chambers (100 μl cell suspension, 10 6 cells/ml in RPMI-1640 with FBS free) and IL8 (0. 1 ng/ml, 1 ng/ml and 10 ng/ml diluted separately in serum free RPMI-1640 ) was added in lower chamber with a polycarbonate filter (8um pore size) used to separate the two compartments. After incubation at 37ºC with 5% CO₂ for 1h, the filter was removed, then cells in low chamber were observed by inverted microscope at low magnification (×100) and the number of migrated cells were counted at high magnification (×400) randomly (five fields for each filter). The migrated Jurkat cells in low chamber at low magnification (×100) randomly, and the migrated cells were counted at high magnification (×400). IL8 is able to induce migration of Jurkat cells, and the optimum chemotaxis of IL8 occurs at 1~10 ng/ml.
Lyophilized from 20 mM Tris (pH 8.0) with 150 mM NaCl, 1 mM EDTA, 1 mM DTT, 0.01% SKL, 5% Trehalose, Proclin300. Reconstitute with 20 mM Tris and 150 mM NaCl (pH 8.0) to a concentration of 0.1-1.0 mg/mL. Do not vortex.
For short-term storage (1-2 weeks), store at 4ºC. For long-term storage, store at -20ºC or below. After reconstitution, keep as concentrated solution. Avoid freeze-thaw cycles.
N-terminal His-Tag; Ala23~Ser101 (NP_001075762.1)
< 1 EU/μg
For laboratory use only. Not for any clinical, therapeutic, or diagnostic use in humans or animals. Not for animal or human consumption.