Fig. 8From: Early-life exposure to three size-fractionated ultrafine and fine atmospheric particulates in Beijing exacerbates asthma development in mature miceF1 exposure enhanced the OVA-induced activation of the TGF-β1/Smad2 (a) and Smad3/Stat3 (b) pathways involved in airway fibrosis. The expression of the relevant proteins was detected 24 h after the last OVA challenge according to the schedule shown in Fig. 5. n = 5 mice/groupBack to article page