Biomedical subjects

J M Restorick

Publications and source records attributed to J M Restorick.

4 recordsLinked to original sources

PubMed1991

The effect of cromakalim on the normal and hyper-reflexic human detrusor muscle.

Cromakalim is a benzopyran derivative which relaxes smooth muscle, probably by opening membrane potassium channels. This study tested the effect of cromakalim on spontaneous, electrically induced and pharmacologically induced contractile activity of normal and hyper-reflexic human detrusor muscle samples. All 3 types of contractile activity were reduced in the presence of cromakalim. A preliminary clinical trial of cromakalim was conducted, the results of which also suggest that this type of drug may have a significant role in the treatment of detrusor instability and hyper-reflexia.

Acetylcholine↗

PubMed1989

The density of cholinergic and alpha and beta adrenergic receptors in the normal and hyper-reflexic human detrusor.

The density of cholinergic and of alpha and beta adrenergic receptors was measured in samples of normal and hyper-reflexic human detrusor muscle. There was a significant reduction in the density of cholinergic receptors and a significant increase in the density of alpha adrenergic receptors in the hyper-reflexic samples as compared with normal. There was no difference between the two groups in the density of beta adrenergic receptors.

Female↗

PubMed1985

Vasoactive intestinal polypeptide in the hyper-reflexic neuropathic bladder.

The distribution of nerves containing vasoactive intestinal polypeptide (VIP) in the hyper-reflexic neuropathic bladder was investigated using immunocytochemistry and radioimmunoassay. Biopsy specimens were taken from the bladders of 21 patients with urodynamically proven detrusor hyper-reflexia and from 20 control patients with no urodynamic abnormality. The results showed a reduction in the number of VIP immunoreactive nerves and a reduction in VIP concentration in the hyper-reflexic bladder when compared with control samples.

Adult↗

PubMed1983

Vasoactive intestinal polypeptide in the normal and unstable bladder.

The possible involvement in idiopathic detrusor instability of a newly discovered type of autonomic nerve containing vasoactive intestinal polypeptide (VIP) has been studied. Immunocytochemistry and radioimmunoassay, using specific antibodies against VIP, were carried out on 20 biopsy specimens from the bladders of patients with detrusor instability and 20 specimens from control patients. The concentration of VIP in the unstable bladders was found to be markedly reduced from 36.52 +/- 4.8 pmol/g (mean +/- SEM) to 7.62 +/- 1.84 pmol/g (P less than 0.01). The number of VIP immunoreactive nerves was greatly decreased in all of the layers but particularly in the muscle layer of the unstable bladder in comparison with the controls. These findings may provide important information about the mechanism of this disorder.

Adult↗