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Poly (I:C) increases growth factor expression in a macrophage-dependent fashion. Kidney cortex mRNA was analyzed by real-time PCR for TGFβ, HB-EGF, PDGF-B, and osteopontin; values are relative to expression of the gene encoding GAPDH (n = 4–6 mice per group). *, P < 0.05; **, P < 0.01; ***, P < 0.001.
