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Activation of neuropeptide receptors on leukocytes induces chemotaxis. We determined in Boyden chambers with micropore filters, whether in human monocytes and lymphocytes this migratory response is heparan sulfate proteoglycan (HSPG) dependent. Chemotaxis toward calcitonin gene-related peptide, secretoneurin, vasoactive intestinal peptide (VIP), and substance P (SP) was abolished by removal of heparan...
Monocytes appear to play a central role in inflammatory processes like atherogenesis or lung inflammation both as the progenitors of foam cells and as a potential source of factors mediating further inflammatory processes. However, signals mediating the influx of monocytes into the inflammatory focus remain partly unknown. Secretoneurin (SN) is a more recently characterised 33-amino acid neuropeptide...
Secretoneurin is a newly discovered 33-amino-acid peptide derived from secretogranin II (chromogranin C) that is found in sensory afferent C-fibers. We show here that secretoneurin triggers the selective migration of human monocytes in vitro and in vivo. Combinations of secretoneurin with the sensory neuropeptides, substance P or somatostatin, synergistically stimulate such migration. The attraction...
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