Title: Oxygen-Induced Retinopathy in Mice: Amplification by Neonatal IGF-I Deficit and Attenuation by IGF-I Administration
Authors: Vanhaesebrouck, Sophie
Daniels, Hans
Moons, Lieve
Vanhole, Christine
Carmeliet, Peter
de Zegher, Francis # ×
Issue Date: Mar-2009
Publisher: Int pediatric research foundation, inc
Series Title: Pediatric research vol:65 issue:3 pages:307-310
Abstract: In preterms, low serum levels of IGF (IGF-I) correlate with retinopathy of prematurity (ROP). In mice, IGF-I is a prerequisite for normal retinal development. We further explored the link between IGF-I and oxygen-induced retinopathy (OIR). To assess the role of endogenous IGF-I, pups were redistributed into smaller versus larger litters at birth; in one subgroup, we measured body weight and circulating IGF-I; in another, we applied hyperoxia and assessed retinal neovascularization (NV). To screen for the potential role of exogenous IGF-I. we administered a single bolus of rhIGF-I on postnatal day (P) 4 to pups in normal litters, and applied hyperoxia; body weight and IGF-I were measured; maturation and NV were assessed. Neonatal mice in larger litters had a lower body weight than mice in smaller litters; they had lower levels of circulating IGF-I, and developed more OIR (p = 0.002). Mice who had received rhIGF-I, weighed more and had higher endogenous IGF-I levels; they matured faster and developed less OIR (p = 0.00001). These findings in mice are the first to Support the notion that higher availability of endogenous or exogenous IGF-I reduces OIR risk, and thus sharpen the perspective that ROP may be preventable by briefly up-regulating IGF-I after birth. (Pediatr Res 65: 307-310, 2009)
ISSN: 0031-3998
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Vesalius Research Centre (-)
Section Newborn (-)
Animal Physiology and Neurobiology Section - miscellaneous
Laboratory of Angiogenesis and Vascular Metabolism (Vesalius Research Center) (+)
× corresponding author
# (joint) last author

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