Serum insulin-like growth factor-I concentrations in late middle age: no association with birthweight in three UK cohorts |
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Authors: | Holt R I G Syddall H E Phillips D I W Martyn C N Gluckman P D Breier B H Wood P J Fall C H D |
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Institution: | Fetal Origins of Adult Disease Division, School of Medicine, University of Southampton, Southampton, UK. |
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Abstract: | BACKGROUND: Small body size at birth and during infancy is associated with an increased risk of adult osteoporosis and cardiovascular disease. Fetal programming of the growth hormone-insulin-like growth factor (GH-IGF) axis may provide a mechanism for these epidemiological findings. AIMS: To determine whether measurements of GH and IGF-I in late middle age were related to size at birth and in infancy. METHODS: Overnight urinary GH excretion and fasting serum IGF-I were measured in 309 men and 193 women from Hertfordshire (born 1920-1930) for whom birthweight and weight at 1 year were recorded. Serum IGF-I was measured in men and women from Preston (n=254, born 1935-1943) and Sheffield (n=215, born 1939-1940) whose birthweight and other birth measurements were recorded. RESULTS: Urinary GH and serum IGF-I were not related to birthweight, other measurements at birth, or weight at 1 year. CONCLUSION: In contrast to previous studies in children or young adults, these data do not support the hypothesis that IGF-I concentrations are programmed by intra-uterine events, as assessed by birthweight, in late middle age. |
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