Boullin D J, Du Boulay G H, Rogers A T
Br J Clin Pharmacol. 1978 Sep;6(3):203-15. doi: 10.1111/j.1365-2125.1978.tb04586.x.
Acute cerebral arterial spasm was produced in baboons by intracisternal injection of blood or 5-hydroxytryptamine (5-HT). Blood induced spasm was not antagonized by the potent 5-HT antagonist BW501C67, but 5-HT induced cerebral arterial spasm was largely antagonized. Blood platelets from baboons were isolated and aggregated with adenosine diphosphate (ADP) and 5-HT. 5-HT induced platelet aggregation was abolished by BW501C67 It was also abolished after intracisternal administration of the drug. Thus it is concluded that BW501C67 antagonized 5-HT induced cerebral arterial spasm. BW501C67 also failed to antagonize contractions produced by human cerebrospinal fluid, serum and platelet extracts on the isolated human basilar artery, the isolated rat fundus and aorta. These results suggest that the role of 5-HT in the aetiology of human cerebral spasm may be minimal.
通过向狒狒脑池内注射血液或5-羟色胺(5-HT)来诱发急性脑动脉痉挛。强效5-HT拮抗剂BW501C67不能拮抗血液诱导的痉挛,但能很大程度上拮抗5-HT诱导的脑动脉痉挛。分离狒狒的血小板,并用二磷酸腺苷(ADP)和5-HT使其聚集。BW501C67可消除5-HT诱导的血小板聚集。在脑池内给药后也可消除该现象。因此得出结论,BW501C67可拮抗5-HT诱导的脑动脉痉挛。BW501C67也不能拮抗人脑脊液、血清和血小板提取物对离体人基底动脉、离体大鼠胃底和主动脉产生的收缩作用。这些结果表明,5-HT在人类脑痉挛病因学中的作用可能微乎其微。