YAMC (A, B, D, F), HT29 (C), and kiKSR-expressing cells (E) were treated with viable LGG, hk-LGG, LGG-cm, or LGG-s as indicated for 1 h followed by TNF (100 ng/ml, 15 min) treatment. PI 3-kinase inhibitors, wortmannin (100 nm) or LY294002 (10 μm), or MEK1 inhibitor PD98059 (10 μm) was used to pre-treat cells for 1 h before TNF or LGG treatment (D). Akt activation was detected by Western blot analysis of cellular lysates with anti-Ser(P)-473-Akt and anti-Akt antibodies. YAMC cells were treated with LGG for the indicated times, and IκBα degradation and ERK1/2 activation were detected by Western blot analysis of cellular lysates with anti-IκBα or anti-phospho (P) ERK1/2 antibodies (F).