Evidence for a neuroprotective effect of pyrid-3-yl-sulphonyl-urea in
photochemically induced focal ischaemia in rats: magnetic resonance imaging
evaluation.
Baudelet C, Demeure R, Frois A, Masereel B, Goudemant JF, Ritter C,
Gallez B
Laboratory of Medicinal Chemistry and Radiopharmacy, Universite Catholique
de Louvain, Brussels, Belgium.
A neuroprotective effect can be obtained with N-[(4-cycloheptylaminopyrid-3-yl)sulphonyl]N'-cycloheptyl
urea (BM27), a pyrid-3-yl-sulphonylurea structurally related to torasemide,
a loop diuretic. We have investigated the neuroprotective effect of BM27
by magnetic resonance imaging and use of the photothrombotic model of cerebral
infarction in the rat. This method enables non-invasive quantification
of the extent of the cerebral oedema from T2-weighted spin-echo images.
This article reports the evolution of the extent of oedema with time (0.5,
1, 2, 4, 6, 24 and 48 h, 7 and 15 days and 1 month after induction of the
lesion) in rats pretreated with 5 mg kg(-1) BM27 or an appropriate control.
At all times, the rats treated with BM27 had, on average, smaller lesions
than control rats (30% decrease between 2 h and 6 h). These results strongly
suggest a significant (P < 0.01) but modest neuroprotective effect of
BM27 in ischaemic cerebral stroke. Further investigations should be performed
to determine if BM27 or its analogues are of clinical interest.
PMID: 10504038, UI: 99431363