Longitudinal infusion of a complex of insulin-like growth factor-I and IGF-binding protein-3 in five preterm infants: pharmacokinetics and short-term safety

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@article{92cae0224ed84e38a55e37c6157585b1,
title = "Longitudinal infusion of a complex of insulin-like growth factor-I and IGF-binding protein-3 in five preterm infants: pharmacokinetics and short-term safety",
abstract = "BACKGROUND: In preterm infants, low levels of insulin-like growth factor-I (IGF-1) and IGF binding protein 3 (IGFBP-3) are associated with impaired brain growth and retinopathy of prematurity (ROP). Treatment with IGF-I/IGFBP-3 may be beneficial for brain development and may decrease the prevalence of ROP. METHODS: In a phase II pharmacokinetics and safety study, five infants (three girls) with a median (range) gestational age (GA) of 26 wk + 6 d (26 wk + 0 d to 27 wk + 2 d) and birth weight of 990 (900-1,212) g received continuous intravenous infusion of recombinant human (rh)IGF-I/rhIGFBP-3. Treatment was initiated during the first postnatal day and continued for a median (range) duration of 168 (47-168) h in dosages between 21 and 111 mu g/kg/24h. RESULTS: Treatment with rhIGF-I/rhIGFBP-3 was associated with higher serum IGF-I and IGFBP-3 concentrations (P < 0.001) than model-predicted endogenous levels. Of 74 IGF-I samples measured during study drug infusion, 37 (50%) were within the target range, 4 (5%) were above, and 33 (45%) were below. The predicted dose of rhIGF-I/rhIGFBP-3 required to establish circulating levels of IGF-I within the intrauterine range in a 1,000 g infant was 75-100 mu g/kg/24 h. No hypoglycemia or other adverse effects were recorded. CONCLUSION: In this study, continuous intravenous infusion of rhIGF-I/rhIGFBP-3 was effective in increasing serum concentrations of IGF-I and IGFBP-3, and was found to be safe.",
author = "David Ley and Ingrid Pupp and Aimon Niklasson and Magnus Domellof and Friberg, {Lena E.} and Jan Borg and Chatarina Lofqvist and Gunnel Hellgren and Smith, {Lois E. H.} and Anna-Lena Hard and Ann Hellstrom",
year = "2013",
doi = "10.1038/pr.2012.146",
language = "English",
volume = "73",
pages = "68--74",
journal = "Pediatric Research",
issn = "1530-0447",
publisher = "International Pediatric Foundation Inc.",
number = "1",

}