Fig. 3From: PM2.5 exposure induced renal injury via the activation of the autophagic pathway in the rat and HK-2 cellCollagen deposition induced by PM2.5 exposure. a Deposit of collagen by Masson’s Trichromic stain. b mRNA expressions of TGF-β and Smad2, on histogram graphic** indicate statistical difference (p < 0.01), independent-sample t testBack to article page