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. 2006 Sep 19;3(9):e358. doi: 10.1371/journal.pmed.0030358

Figure 7. Anti-Celiac Peptide Antibodies Activate TLR4 in Cells Transfected with the TLR4 Gene.

Figure 7

Activation of NF-κB upon engagement of TLR4.

(A) Stimulation of 293T cells transfected with TLR4 by LPS 100 ng/ml (1), 10 ng/ml (2), 1 ng/ml (3), 0.1 ng/ml (4); by affinity-purified anti-celiac peptide antibodies, 4 μg/ml (5), 2 μg/ml (6), 1 μg/ml (7), 0.5 μg/ml (8) by affinity-purified antibodies directed against an irrelevant control peptide, 4 μg/ml (9), 2 μg/ml (10), 1 μg/ml (11), and 0.5 μg/ml (12).

(B) Stimulation of 293T cells transfected with TLR4 by LPS 100 ng/ml (1), 10 ng/ml (2), 1 ng/ml (3), 0.1 ng/ml (4), by affinity-purified antibodies against an irrelevant peptide 1 μg/ml (5), by affinity-purified anti-celiac peptide antibodies 1 μg/ml (6), by affinity-purified anti-celiac peptide antibodies 1 μg/ml in the presence of 1 μg/ml anti-TLR4 monoclonal antibody (7), by affinity-purified anti-celiac peptide antibodies 1 μg/ml in the presence of 1 μg/ml celiac peptide (8), by affinity-purified anti-celiac peptide antibodies 1 μg/ml in the presence of 1 μg/ml irrelevant control peptide (9), by affinity-purified anti-celiac peptide antibodies 1 μg/ml in the presence of 1 μg/ml recombinant human tTG (10), by affinity-purified anti-VP-7 peptide antibodies 1 μg/ml (11), by affinity-purified anti-VP-7 peptide antibodies 1 μg/ml in the presence of 1 μg/ml VP-7 peptide (12), by affinity-purified anti-VP-7 peptide antibodies 1 μg/ml in the presence of 1 μg/ml celiac peptide (13), and by affinity-purified anti-celiac peptide antibodies 1 μg/ml in the presence of 1 μg/ml ovalbumin (14). Results are expressed as percentage of positive control, where the positive control is the OD value obtained upon stimulation of TLR4 transfected cells with 100 ng/ml LPS (maximal concentration used).