Learn More
The presence of a bradykinin receptor on guinea pig peritoneal macrophages was evidenced by binding studies and by the effect of bradykinin on activation of the phospholipase C and the increase in intracellular calcium concentration ([Ca2+]i). Binding studies demonstrated a specific, saturable binding for [3H]bradykinin inhibited by the bradykinin B2 (HOe(More)
The present study examines the influence of kinins on the migratory capacity of human polymorphonuclear leukocytes under in vitro conditions using the Boyden chamber technique. By means of checkerboard analysis the migration of neutrophils induced by bradykinin could be characterized as true chemotaxis. The stimulation of human neutrophils with bradykinin,(More)
The peptide substance P (SP) is known to take part in the regulation of the Cl(-)-dependent secretion in the animal and human colonic mucosa. However, no conclusive evidence for the expression of the functional tachykinin NK(1) receptor has been found in the human colonic epithelial cells. Using the reverse transcription-polymerase chain reaction (RT-PCR)(More)
In this article, we analyzed the role of kinins and kinin receptors with respect to the activation of leukocytes. In these cells, the biological effects of kinin peptides are mediated by kinin receptor subtypes B1, B2, or both, depending on species and cell type. In contrast to the other leukocytes, neutrophils contain the complete system for the synthesis(More)
Neutrophil apoptosis is an important event in the resolution of inflammation. The role of substance P (SP) in neutrophil apoptosis has not been previously investigated. We found that substance P delays apoptosis in neutrophils. Human neutrophils were isolated and cultured up to 24 hours. Apoptosis was detected by light and electron microscopy, as well as(More)
SUMMARY H-89 is a compound characterized in vitro as a potent and selective inhibitor of protein kinase A. In the present study, we observed that H-89 induced morphological transformation and caused growth inhibition of the human colon cancer cell line Caco-2 in a dose-dependent manner. However, another protein kinase A inhibitor, H-8, had no effect on(More)
In this report, we investigated the responsiveness of subpopulations of elicited peritoneal macrophages between each other compared to resident tissue macrophages of alveoli of guinea pig to the action of bradykinin. Bradykinin stimulated the secretion of superoxide radical, arachidonic acid and prostaglandin E2 (PGE2) via the bradykinin B2 receptor subtype(More)
Objective and Design: The endogenous nonapeptide bradykinin is implicated in the pathogenesis of a number of inflammatory diseases. Recently, it could be shown that bradykinin is a potent stimulus for the generation of arachidonic acid, prostaglandin E2 (PGE2) and superoxide radical via the bradykinin B2 receptor from macrophages depending on their stage of(More)
It is commonly assumed that bradykinin B2 receptor antagonists bind to a receptor site partially different from that for agonists. Thus, it is likely that there exists more than one key modification to convert bradykinin receptor agonists into antagonists. In this respect, [L-NMePhe2]-BK represents the basic structure of a new type of bradykinin B2 receptor(More)
INTRODUCTION Cholecystokinin (CCK) is a peptide hormone and plays a major role both in the regulation of pancreatic enzyme secretion and growth of the gastrointestinal tract. The pancreatic CCK receptors are highly glycosylated membrane proteins that are able to bind plant lectins such as wheat germ agglutinin (WGA) and Ulex europaeus agglutinin (UEA-I). (More)
  • 1