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IL-8 production by HeLa cells induced by GST fusion protein-coated microparticles. HeLa cells were incubated with microparticles coated with fusions of the indicated proteins to GST at a ratio of 4,000 microparticles/cell or with medium alone. After 8 h, culture supernatants were collected and the levels of IL-8 were determined by ELISA. Values represent the means ± standard deviations of triplicate samples. The results are representative of three independent experiments.
