Assay Method Information

Assay Name:  In Vitro Inhibition Assay
Description:  An in vitro assay showed inhibition of CXCR2-mediated intracellular calcium release. Briefly, human neutrophils were suspended in HBSS- (without Ca2+ and Mg2+) containing 10 mM HEPES and FLIPR Calcium 3 dye (3.1x107 cells in total volume 1.7 mL). Cells were aliquoted (200 uL of the cell suspension per tube, 8 tubes total) and 2 uL of the designated compound (with appropriate dilutions) were added to each of 6 tubes. As controls, 2 uL of DMSO (1% final concentration) were added to 2 other tubes. Cells were incubated for 30 min at 37 C. After dye loading, tubes were centrifuged at 6,000 rpm for 1 min, supernatant was removed and the cell pellet was re-suspended in 200 uL of HBSS+ (with Ca2+ and Mg2+) containing 10 mM HEPES. The test compound or DMSO (control) was added again at the same concentrations that were used during cell loading. The cell suspension was aliquoted into a 96-well Reading Plate (Corning) in a volume of 90 uL (105 cells/well).
Affinity data for this assay

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