Figure 3From: Growth of human bronchial epithelial cells at an air-liquid interface alters the response to particle exposure RT-PCR for IL-8 (A), IL-6 (B), HOX1 (C), and COX2 (D) relative to GAPDH in unexposed NHBE cells. RNA for all proteins significantly changed with differentiation at ALI. *Significant difference relative to RNA in NHBE cells at day 0.Back to article page