Plasma fibrinogen and physiological aging.
Results of prospective studies indicate that increased fibrinogen concentration is significantly associated with the risk of arteriosclerotic vessel disease. As the fibrinogen concentration is considered to rise with aging, determination of its physiological values with various methods in strictly healthy adult and aged individuals is a prerequisite to evaluating the relative contribution of fibrinogen to cardiovascular diseases. Fibrinogen concentration was determined in 209 healthy subjects, aged 19 to 96 years. Persons over the age of 60 were recruited according to the stringent criteria of the Senieur protocol established for human immunogerontological studies. Fibrinogen concentrations, obtained by heating precipitation and by thrombin clotting time with both electromagnetic water-bath and semiautomatic coagulometer, ranged from 1.55 to 3.70 g/L. A rise in plasma concentration was observed with aging. Independently of age, females exhibited higher concentrations than males. Significantly higher values were observed in subjects over 60 years of age, in both sexes, in comparison with the younger groups.
Laharrague
P F
PF
Service d'Hématologie, CHU Toulouse-Rangueil, France.
Cambus
J P
JP
Fillola
G
G
Corberand
J X
JX
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000097:blood*; D001774:Blood Chemical Analysis; D002318:Cardiovascular Diseases / Q000209:etiology; D005260:Female; D005340:Fibrinogen / Q000378:metabolism*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D012307:Risk Factors; D012727:Sex Characteristics
D005340:Fibrinogen