Journal: Immunology
Article Title: Lipopolysaccharide induces calcitonin gene-related peptide in the RAW264.7 macrophage cell line
doi: 10.1111/j.1365-2567.2009.03239.x
Figure Lengend Snippet: Possible inflammatory mediators involved in lipopolysaccharide (LPS) -induced calcitonin gene-related peptide (CGRP) release from RAW macrophages. LPS (1 μg/ml) significantly increased CGRP release from RAW macrophages (a, b, *P < 0·001). (a) Co-treatment of LPS with 1·5 and 5 μg/ml nerve growth factor (NGF) receptor Fc chimera (sequestering NGF), 1 and 10 ng/ml interleukin-6 (IL-6) antiserum or 1 and 10 ng/ml IL-1β antiserum significantly suppressed LPS-induced CGRP release. Higher concentrations of NGF receptor Fc chimera, IL-6 and IL-1β further suppressed CGRP release to lower levels than vehicle. * indicates P < 0·05 or P < 0·001, antisera + LPS versus vehicle. + indicates P < 0·001, antisera + LPS versus LPS. (b) Co-treatment of LPS (L) with receptor-activity-modifying protein 1 (RAMP1) antiserum (1 and 10 ng/ml) or tyrosine receptor kinase A (trkA) receptor antiserum (1 μg/ml) significantly enhanced LPS-induced CGRP release compared with LPS treatment (+P < 0·001). RAMP1 and trkA antisera by themselves had no effect. Mean ± SEM, n = 3.
Article Snippet: A neutralizing antiserum against NGF receptor trkA was obtained from Chemicon Inc. (Temecula, CA).
Techniques: Activity Assay