AQP4 and infection: After infection with wild type P. aeruginosa and lasI-/rhlI- mutant for 1 h, mRNA levels were slightly affected for AQP0, 1, 2, 3, 8, 11, and 12, with exception for AQP4, 5, 6, 7, 9, and 10 that maintained near to the basal expression level (Table S1).