Proteins were purified from lungs or ATII cells after exposure to MC-LR for 48 h. Western blot analysis of cellular lysates was performed as previously described (Wang et al., 2014 (link)). The following primary antibodies were employed: Rabbit anti-CK18, rabbit anti-CK19, rabbit anti-SP-C, rabbit anti-E-cadherin, rabbit anti-ZO-1, rabbit anti-occludin, rabbit anti-vimentin, rabbit anti-ERK1/2, rabbit anti-p-ERK1/2, rabbit anti-Akt, rabbit anti-p-Akt, mouse anti-MEK1/2, rabbit anti-p-MEK1/2, rabbit anti-PTEN, rabbit anti-GAPDH, mouse anti-MEK1/2 and mouse anti-β-actin (Abcam Inc. Cambridge, MA). Horseradish peroxidase-conjugated goat anti-rabbit/mouse IgG (Boster, Wuhan, China) was used as the secondary antibody. Immunoreactive protein bands were detected using an Odyssey Scanning System (LI-COR Inc).
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