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OBJECTIVE
We examine the hypothesis that cyclic guanosine monophosphate (cGMP) levels are elevated in recipients of continuous-flow left ventricular assist devices (CF-LVADs) and that elevated cGMP levels are associated with a risk of gastrointestinal (GI) bleeding events.
METHODS
The levels of
A poorly controlled cerebral circulation, caused by excessive production of nitric oxide, has been suggested as predisposing to peri/intraventricular haemorrhage (PIVH) in the immature neonate. It is hypothesized that a relation exists between plasma cyclic GMP (cGMP) as an effector of endogenous
Diaspirin cross-linked hemoglobin (DCLHb) is a hemoglobin-based therapeutic agent that produces significant cardiovascular effects, possibly due to its actions on vasoactive substances, such as endothelin (ET) and nitric oxide (NO). We have studied the modulation of cardiovascular effects of DCLHb
OBJECTIVE
Efficiency of the treatment of cerebral vasospasm (CVS) after subarachnoid hemorrhage (SAH) by interfering with the nitric oxide-cyclic guanosine monophospate (cGMP) pathway seems to be inconsistent. So far, it remains unclear whether or not insufficient access to the drugs or impaired
BACKGROUND
Hemorrhagic shock upregulates inducible nitric oxide (NO) synthase (iNOS) expression and the resultant NO overproduction. Liver is one of the major organs that is responsible for increased NO production after trauma-hemorrhage and resuscitation. Guanosine triphosphate cyclohydrolase I
OBJECTIVE
One of the phosphodiesterase isoenzymes, Type V (PDE V), specifically hydrolyzes cyclic guanosine monophosphate to cause vasoconstriction. This study analyses the effect of PDE V inhibition with sildenafil citrate (SC) on cerebral vasospasm and its effect on apoptotic changes of the
Rats subjected to polytrauma and hemorrhage develop a coagulopathy that is similar to acute coagulopathy of trauma in humans, and is associated with a rise in prothrombin time and a fall in clot strength. Because platelet aggregation accounts for a major proportion of clot strength, we This study was undertaken to investigate how protein kinase C (PKC) and nitric oxide (NO) interact to regulate the vascular tone, and how their interaction contributes to the development of vasospasm after subarachnoid hemorrhage (SAH). For these purposes, vasospasm was conducted with a canine
Cerebral vasodilator responses are often impaired following subarachnoid hemorrhage (SAH). Because depolarization of vascular muscle may occur after SAH, we tested in vivo the hypothesis that SAH may augment dilatation in response to hyperpolarization due to activation of K+ channels. Anesthetized
OBJECTIVE
Rho A, a small guanosine triphosphate-binding protein, and rho kinases have been suggested to play an important role in the agonist-induced myofilament Ca++ sensitization and cytoskeletal organization of smooth-muscle cells. To discover their possible roles in the prolonged contraction
Nitric oxide (NO) increases 3',5'-cyclic guanosine monophosphate (cGMP) in vascular smooth muscle and increases cerebral blood flow (CBF). In early stages of cerebral ischemia, NO plays a beneficial role in sustaining CBF. Subarachnoid hemorrhage (SAH), one of the main causes of ischemia, may impair
As inhaled nitric oxide (iNO) may differently increase bleeding time (BT) and inhibit platelet aggregation in normal and lung-injured patients or experimental models, we studied the effects of iNO on hemostasis in presence and absence of an endotoxic lung injury in the rat. Eight hours after
OBJECTIVE
Recent evidence suggests a possible role for Haeme oxygenase (HO)-derived carbon monoxide (CO) in the regulation of vascular tone through elevation of cyclic 3'-5' guanosine monophosphate (cGMP). Previous work from our laboratory has shown that blockade of the HO pathway by
OBJECTIVE
To determine the role of nitric oxide (NO) in intestinal motility dysfunction in rats subjected to hemorrhagic shock (HS).
METHODS
Sixteen male Wistar rats were randomly and equally divided into two groups. The HS model of rat was induced by bleeding from femoral artery. After animal