Philip A Bland-Ward

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1. 7-Nitro indazole (7-NI) produces potent inhibition of rat cerebellar nitric oxide synthase (NOS) with an IC50 of 0.9 +/- 0.1 microM (n = 6). NOS activity is dependent on the presence of both exogenous CaCl2 and NADPH. The inhibitory potency of 7-NI remained unaltered in the presence of different concentrations of either CaCl2 (0.75-7.5 mM) or NADPH(More)
1. The functional consequences of P2X receptor activation on peripheral sensory neurones have been investigated in vivo. Behavioural indices of acute nociception were monitored in the conscious rat following subplantar injection of adenosine 5'-triphosphate (ATP), alpha,beta-methylene ATP, adenosine 5'-diphosphate (ADP) and adenosine. 2. Signs of overt(More)
7-Nitro indazole (7-NI) inhibits rat striatal, cerebellar, hippocampal, cerebral cortex and olfactory bulb nitric oxide synthase (NOS) in vitro with IC50 values of 0.68 +/- 0.01 microM, 0.64 +/- 0.03 microM, 1.53 +/- 0.05 microM, 0.93 +/- 0.04 microM and 1.05 +/- 0.02 microM respectively (n = 6). Intraperitoneal (i.p.) or oral administration of 7-NI (30 mg(More)
ATP-gated P2X ion-channel receptors are localised throughout the mammalian nervous system and have been identified on neurones which participate in conduction of nociceptive information from the periphery to, and within, the CNS. This article briefly reviews recently published research describing the role that ATP and P2X receptors may play in pain(More)
The effect of 7-nitro indazole (7-NI) and a range of substituted indazole derivatives on nitric oxide synthase (NOS) enzyme activity in homogenates of rat cerebellum, bovine endothelial cells and lung from endotoxin-pretreated rats was investigated. 3-bromo 7-nitro indazole was either equipotent (IC50, 0.86 +/- 0.05 microM c.f. 0.78 +/- 0.2 microM, n = 6, P(More)
The purpose of this study was to use intravital microscopy to determine the effect of a selective adenosine A1 receptor agonist, GR79236 (1, 3 and 10 microg/kg i.v.), on neurogenic dural blood vessel dilation in anaesthetized rats. Vasodilation was evoked either by electrical stimulation of perivascular trigeminal nerves or by intravenous CGRP. GR79236(More)
1. After a period of myocardial ischaemia, reperfusion of the myocardium can elicit cardiac arrhythmias. Susceptibility to these arrhythmias declines with time, such that a preceding period of more than approximately 40 min ischaemia is associated with few reperfusion-induced arrhythmias. We have tested the hypothesis that this decline in susceptibility(More)
123 beta1 chain integrin) bispecific antibodies mediate transport of JCV into the central nervous system (CNS) to cause PML. Not only have they failed to provide supporting experimental data but they offer no substantiating evidence from the literature. The mechanism by which JCV-VLA4 bispecifics might mediate transfer of virus to the CNS is presumably(More)
Using extracellular recordings from deep dorsal horn neurones in the anaesthetized rat, the effects of intraplantar ( administration of formalin were examined. Phasic patterns of dorsal horn firing were observed which temporally concur with previously described behavioural responses following formalin. However, unexpectedly, formalin abolished(More)