Insulin-like growth factors (IGFs) and IGF binding proteins-1, -2, and -3 in newborn serum: Relationships to fetoplacental growth at term
Author
dc.contributor.author
Osorio, Marcial
Author
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Torres, Jorge
Author
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Moya, Fernando
Author
dc.contributor.author
Pezzullo, John
Author
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Salafia, Carolyn
Author
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Baxter, Robert
Author
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Schwander, Jurg
Author
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Fant, Michael
Admission date
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2019-01-29T15:54:49Z
Available date
dc.date.available
2019-01-29T15:54:49Z
Publication date
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1996
Cita de ítem
dc.identifier.citation
Early Human Development, Volumen 46, Issue 1-2, 2018, Pages 15-26
Identifier
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03783782
Identifier
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10.1016/0378-3782(96)01737-9
Identifier
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https://repositorio.uchile.cl/handle/2250/162719
Abstract
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Cord sera were obtained from term, Chilean newborns exhibiting various patterns of intrauterine growth and assayed for IGF-1, IGF-2, IGFBP-1, IGFBP-2, and IGFBP-3 by specific radioimmunoassays (RIA). Serum levels of each peptide were correlated with birth weight (BW), ponderal index (PI), and placental weight (PW). Total IGF-1 levels correlated with BW (r = 0.665, P = 0.0001), PI (r = 0.527, P = 0.004), and PW (r = 0.596, P = 0.0017). In contrast, IGF-2 failed to correlate with any growth parameter. Of the three binding proteins, IGFBP-3 exhibited the strongest relationship to each growth parameter. IGFBP-3 correlated significantly with BW (r = 0.71, P < 0.0001), PI (r = 0.782, P < 0.0001), and PW (r = 0.57, P = 0.0029). In addition IGFBP-3 levels positively correlated to IGF-1 levels (r = 0.614, P = 0.0005). By contrast, circulating IGFBP-1 and IGFBP-2 were inversely related to IGF-1 levels. All five peptides were subjected to multiple regression analysis and related to BW. Significan