P. Kotsonis

Autoinhibition of neuronal nitric oxide synthase: distinct effects of reactive nitrogen and oxygen species on enzyme activity.

Kotsonis, P, Frey, A, Fröhlich, L G, Hofmann, H, Reif, A, Wink, D A, ...

Nitric oxide (NO) synthases (NOSs), which catalyse the oxidation of L-arginine to L-citrulline and an oxide of nitrogen, possibly NO or nitroxyl (NO-), are subject to autoinhibition by a mechanism...

Allosteric regulation of neuronal nitric oxide synthase by tetrahydrobiopterin and suppression of auto-damaging superoxide.

Kotsonis, P, Fröhlich, L G, Shutenko, Z V, Horejsi, R, Pfleiderer, W, Schmidt, H H

The underlying mechanisms regulating the activity of the family of homodimeric nitric oxide synthases (NOSs) and, in particular, the requirement for (6R)-5,6,7,8-tetrahydro-L-biopterin (H(4)Bip) are...

Autoinhibition of neuronal nitric oxide synthase: distinct effects of reactive nitrogen and oxygen species on enzyme activity.

Kotsonis, P, Frey, A, Fröhlich, L G, Hofmann, H, Reif, A, Wink, D A, ...

Nitric oxide (NO) synthases (NOSs), which catalyse the oxidation of L-arginine to L-citrulline and an oxide of nitrogen, possibly NO or nitroxyl (NO-), are subject to autoinhibition by a mechanism...

Allosteric regulation of neuronal nitric oxide synthase by tetrahydrobiopterin and suppression of auto-damaging superoxide.

Kotsonis, P, Fröhlich, L G, Shutenko, Z V, Horejsi, R, Pfleiderer, W, Schmidt, H H

The underlying mechanisms regulating the activity of the family of homodimeric nitric oxide synthases (NOSs) and, in particular, the requirement for (6R)-5,6,7,8-tetrahydro-L-biopterin (H(4)Bip) are...

Facilitation by procaterol, a beta-adrenoceptor agonist, of noradrenaline release in the pithed rat independently of angiotensin II formation.

Kotsonis, P, Majewski, H

1. The effects of the beta 2-adrenoceptor agonist, procaterol, on sympathetic neuroeffector transmission were studied in the pithed adrenal demedullated rat to determine if generation of angiotensin...

Noradrenaline release and the effect of endogenous activation of the phospholipase C/protein kinase C signalling pathway in rat atria

Majewski, H, Kotsonis, P, Murphy, T V, Barrington, M

It has been proposed that protein kinase C (PKC) in sympathetic nerves is activated during action-potential evoked release of noradrenaline and helps maintain transmitter output. We studied this...

The structural requirements for phorbol esters to enhance serotonin and acetylcholine release from rat brain cortex

Iannazzo, L, Kotsonis, P, Majewski, H

The effects of various phorbol-based protein kinase C (PKC) activators on the electrical stimulation-induced (S-I) release of serotonin and acetylcholine was studied in rat brain cortical slices...

Differential abilities of phorbol esters in inducing protein kinase C (PKC) down-regulation in noradrenergic neurones

Kotsonis, P, Funk, L, Prountzos, C, Iannazzo, L, Majewski, H

The ability of several phorbol ester protein kinase C (PKC) activators (phorbol 12, 13-dibutyrate, PDB; phorbol 12, 13-diacetate, PDA; and 12-deoxyphorbol 13-acetate, dPA) to down-regulate PKC was...

Protein kinase C involvement in maintenance and modulation of noradrenaline release in the mouse brain cortex.

Schroeder, G. E., Kotsonis, P., Musgrave, I. F., Majewski, H.

1. The role of protein kinase C in the modulation of noradrenaline release was investigated in mouse cortical slices which were pre-incubated with [3H]-noradrenaline. The aim was to investigate the...

The structural requirements for phorbol esters to enhance noradrenaline and dopamine release from rat brain cortex.

Kotsonis, P., Majewski, H.

1. The effects of various protein kinase C (PKC) activators on the stimulation-induced (S-I) release of noradrenaline and dopamine was studied in rat cortical slices pre-incubated with...

Noradrenaline synthesis after sympathetic nerve activation in rat atria and its dependence on calcium but not CAM kinase II and protein kinases A or C.

Kotsonis, P., Binko, J., Majewski, H.

1. The biosynthesis of noradrenaline following sympathetic nerve activation was investigated in rat atria. In particular the time course of noradrenaline synthesis changes, the relationship of...