Increased neuropeptide Y concentrations in cerebrospinal fluid from patients with aneurysmal subarachnoid hemorrhage.
We investigated the possible relation between neuropeptides and cerebral vasoconstriction in samples of ventricular or cisternal cerebrospinal fluid from 14 patients with subarachnoid hemorrhage. Neuropeptide Y, calcitonin gene-related peptide, atrial natriuretic peptide, and pituitary polypeptide 7B2 were present in the cerebrospinal fluid of these patients. Concentrations of calcitonin gene-related peptide and 7B2 were not significantly different from those in control subjects, but that of atrial natriuretic peptide was significantly lower. Although the mean concentration of neuropeptide Y was not significantly higher than control, consecutive determinations showed an increase 6-11 days after the onset of subarachnoid hemorrhage. An initially high 7B2 concentration decreased gradually, although half the patients showed a second increase greater than 10 days after the onset. Considering the well-recognized vasoconstrictive effect of neuropeptide Y, it is possible that this increase in its concentration in the cerebrospinal fluid plays a role in the pathogenesis of the cerebral vasospasm that is often seen after subarachnoid hemorrhage.
Suzuki
Y
Y
Department of Endocrinology, Dokkyo University School of Medicine, Tochigi, Japan.
Sato
S
S
Suzuki
H
H
Namba
J
J
Ohtake
R
R
Hashigami
Y
Y
Suga
S
S
Ishihara
N
N
Shimoda
S
S
D000368:Aged; D009320:Atrial Natriuretic Factor / Q000134:cerebrospinal fluid; D015740:Calcitonin Gene-Related Peptide / Q000134:cerebrospinal fluid; D002851:Chromatography, High Pressure Liquid; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000134:cerebrospinal fluid / Q000150:complications; D008297:Male; D008875:Middle Aged; D009419:Nerve Tissue Proteins; D051859:Neuroendocrine Secretory Protein 7B2; D009478:Neuropeptide Y / Q000134:cerebrospinal fluid*; D009994:Osmolar Concentration; D010907:Pituitary Hormones / Q000134:cerebrospinal fluid; D013345:Subarachnoid Hemorrhage / Q000134:cerebrospinal fluid* / Q000209:etiology; D013997:Time Factors
D009419:Nerve Tissue Proteins; D051859:Neuroendocrine Secretory Protein 7B2; D009478:Neuropeptide Y; D010907:Pituitary Hormones; C497678:SCG5 protein, human; D009320:Atrial Natriuretic Factor; D015740:Calcitonin Gene-Related Peptide