C. Camacho-hubner et al., Insulin-like growth factor-I deficiency caused by a partial deletion of the IGF-I gene: Effects of rhIGF-I therapy, GROWTH H I, 9, 1999, pp. 47-51
Insulin-like growth factor-I (IGF-I) is one of the most important regulator
of growth. IGF-I deficiency is associated with prenatal and post-natal gro
wth failure and may arise primarily as a result of GH receptor/post-recepto
r abnormalities or defects in the synthesis and transport of IGF-I. We have
previously reported a 17.2-year-old boy with severe growth retardation and
undetectable serum levels of IGF-I caused by a partial deletion of the IGF
-I gene. This short review will concentrate on results of a recent study wh
ich examined the effects of rhIGF-I therapy on the GH-IGF system of this pa
tient. Similar to healthy individuals, this patient had normal IGFBP-3 but
elevated ALS levels. IGF-I treatment has improved linear growth and insulin
sensitivity in this patient by restoring IGF-I levels and by normalizing c
irculating GH, IGFBPs and insulin levels. (C) 1999 Harcourt Publishers Ltd.