In this study, the interaction of natriuretic peptides (NP) and bradykinin (BK) signaling pathways was identified by measuring membrane potential (V(m)) and intracellular Ca(2+) using the patch-clamp technique and flow cytometry in HEK-293 cells. BK and NP receptor mRNA was identified using RT-PCR. BK (100 nM) depolarized cells activating bradykinin receptor type 2 (B(2)R) and Ca(2+)-dependent ...

In gastrointestinal smooth muscle, the neuropeptides vasoactive intestinal peptide (VIP) and pituitary adenylate cyclase-activating polypeptide (PACAP) induce relaxation by interacting with VIP2/PACAP3receptors coupled via Gs to adenylyl cyclase and with distinct receptors coupled via Gi1 and/or Gi2 to a smooth muscle endothelial nitric oxide synthase (eNOS). The present study identifies the re...

Two types of natriuretic peptide receptors (NPR-A and NPR-B) are membrane guanylate cyclases whose relative expression varies in different tissues. Because natriuretic peptides have been shown to inhibit aortic smooth muscle proliferation, we investigated the regulation of NPR-A and NPR-B in these cells under different proliferative conditions. NPR subtype mRNA levels were measured by our newly...

In the 25 years since de Bold et al demonstrated the existence of an atrial natriuretic factor, investigation of the cardiac natriuretic peptides has produced a maturing knowledge base1,2 identifying the cardiac peptides and addressing stimuli for secretion of atrial (ANP) and B-type (BNP) natriuretic peptides, the processing and release of the mature bioactive carboxy terminal peptides, togeth...

Almost 3 decades ago, we witnessed the discovery of the natriuretic peptides and the role of the heart as an endocrine organ in which peptides of cardiovascular origin emerged as a humoral link between the heart and the kidney in cardiorenal homeostasis. In the United States, one such natriuretic peptide, B-type natriuretic peptide (BNP), was approved by the US Food and Drug Administration in 2...

Musclin is a novel skeletal muscle-derived secretory factor found in the signal sequence trap of mouse skeletal muscle cDNAs. Musclin possesses a region homologous to the natriuretic peptide family. Thus, musclin is found to bind with the natriuretic peptide clearance receptors. However, the role of musclin in vascular regulation remains unclear. In this study, we aim to investigate the direct ...

RATIONALE Cyclic nucleotides are second messengers that regulate cardiomyocyte function through compartmentalized signaling in discrete subcellular microdomains. However, the role of different microdomains and their changes in cardiac disease are not well understood. OBJECTIVE To directly visualize alterations in β-adrenergic receptor-associated cAMP and cGMP microdomain signaling in early ca...

Previous studies have demonstrated that the ventral aorta of the dogfish shark, Squalus acanthias, responds to a variety of cell-signaling agents. To investigate the generality of vasoactive receptors in the shark vasculature, in particular a conductance artery (anterior mesenteric) and vein (posterior intestinal), I measured the effect of acetylcholine, endothelin, nitric oxide, natriuretic pe...

background one of the main components involving in the pathogenesis and prognosis of sepsis and septic shock is natriuretic peptide. hemodynamic changes in sepsis or septic shock might explain increased plasma levels of these peptides circulations. objectives the present study aimed to assess the value of brain natriuretic peptide (bnp) in prediction of sepsis state and its related morbidity. w...