Fig. 3

Extracellular vesicles (EVs) promote protein expression of Keap1 and HO-1 in bMECs infected with K. pneumoniae. A Changes of SOD activity in bMECs infected with K. pneumoniae or treatment with EVs. B Changes of ROS generation in bMECs infected with K. pneumoniae or treatment with EVs. C–E EVs from bovine colostrum, mature milk and mastitis milk (defined as C-EVs, M-EVs and CM-EVs, respectively) promoted protein expression of Keap1 and HO-1 in bMECs infected with K. pneumoniae. *P < 0.05 or **P < 0.01 is considered significant