title: Circadian rhythm of plasma beta-thromboglobulin in healthy human subjects.
abstract: The circadian variation in platelet function may play a role in the morning increase of coronary thrombotic complications. The circadian variation of plasma beta-thromboglobulin levels--as an indicator of in vivo platelet activation--was investigated in seven healthy volunteers using a commercial radioimmunoassay kit. There was a statistically significant rhythm culminating with an amplitude of 30 micrograms/l (95% tolerance interval/15-45 micrograms/l) at 10.00 hours (95% tolerance interval/07.00-13.00 hours). The morning increase of plasma beta-thromboglobulin indicates an increased in vivo platelet activation at this time of day. This finding could correlate with the morning peak in the onset of myocardial infarction. It might also help in timing therapy of diseases which are associated with platelet hyperactivation.
authors.affiliation: First Medical Clinic, Faculty of Medicine, Comenius University, Bratislava, Czechoslovakia.
authors.forename: J
authors.initials: J
authors.lastname: Pechán
authors.forename: M
authors.initials: M
authors.lastname: Mikulecký
authors.forename: A
authors.initials: A
authors.lastname: Okrucká
mesh_terms: D000328:Adult; D002940:Circadian Rhythm / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015539:Platelet Activation / Q000502:physiology*; D012016:Reference Values; D001620:beta-Thromboglobulin / Q000378:metabolism*
chemical_list: D001620:beta-Thromboglobulin