A normal population study of human salivary insulin-like growth factor 1 (IGF 1) concentrations from birth through puberty.
Insulin-like growth factor 1 (IGF 1) concentrations in mixed saliva samples, collected from a normal population (n = 327, ranging in age from birth to adolescence), were determined by RIA. Salivary IGF 1 concentrations remained steady over a 24-h period when collected at basal rates, but were diminished in saliva samples collected at a maximally stimulated flow rate. A similar pattern was observed for males and females, when IGF 1 levels in saliva were plotted as a function of age. The pattern was that of low levels in early childhood, rising with age, peaking in puberty and falling again in late adolescence. Salivary IGF 1 measurement differed from plasma measurement in three ways: 1) salivary IGF 1 concentrations (70 +/- 50 pM) were 100- to 200-fold less than plasma IGF 1 levels; 2) salivary IGF 1 levels in age-matched male and female samples were not different outside of pubertal influences; 3) salivary IGF 1 levels in neonates were highly variable with concentrations ranging up to pubertal concentrations. The study provides salivary IGF 1 reference data for a pediatric population.
Ryan
J
J
Children's Research Centre, Our Lady's Hospital for Sick Children, Crumlin, Dublin, Ireland.
Mantle
T
T
Costigan
D C
DC
D000293:Adolescent; D000375:Aging / Q000378:metabolism*; D015153:Blotting, Western; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007334:Insulin-Like Growth Factor I / Q000032:analysis* / Q000378:metabolism; D008297:Male; D011863:Radioimmunoassay; D012463:Saliva / Q000737:chemistry*
D007334:Insulin-Like Growth Factor I