The Trypanosoma cruzi Protease Cruzain Mediates Immune Evasion
Figure 3
Cruzain-deficient (KR) but not WT parasites activate NF-κB.
Uninfected controls and mouse macrophages (MΦ) infected with WT or KR T. cruzi were infected for ≤ 1 min (lanes 1, 2), 30 minutes (lanes 3–7) and 60 minutes (lanes 8–11). Cell extracts were western blotted with: A, anti-NF-κB P65 Ab; B, anti ∼P-iκB; C, anti-actin Ab. MΦ were infected as follows: lane #1, WT; lane #2, KR; lane #3, uninfected MΦ; lane #4, WT; lane #5, KR; lane #6, KR with 10 µM K11777; lane #7, KR cultured without K777 for 2 months; lane #8, WT; lane #9, KR; lane #10, KR with 10 µM K11777; lane #11, KR cultured without K11777 for 2 months. Results are representative of six independent experiments using two different methods. Controls (D) were MΦ treated or not with K11777 and/or LPS.