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PDGF-dependent induction of gene expression in Stat1-null and wild-type fibroblasts. (A) Stat1-null or wild-type MEFs were untreated or treated for 30 min with IFN-γ or PDGF alone, or with PDGF plus IFN-γ. c-Jun mRNA levels were determined by Northern analysis. (B) Stat1-null or wild-type MEFs were untreated or treated with PDGF for 2 h. MCP-1 mRNA levels were determined by Northern analysis.
