PMID: 2508389Sep 1, 1989Paper

Small stature and insulin-like growth factors: prolonged treatment of mini-poodles with recombinant human insulin-like growth factor I

Acta Endocrinologica
H P GulerE R Froesch

Abstract

The short stature of mini-poodles is associated with low serum levels of IGF-I. Standard poodles are taller and have considerably higher serum levels of IGF-I. Low IGF-I serum levels may be a symptom or the cause of small stature. We, therefore, undertook a study in which serum IGF-I levels of mini-poodles were elevated over a prolonged period of time by a constant infusion of rhIGF-I and the growth rate of the mini-poodles was followed. We infused four mini-poodles from day 91 to day 221 of age with 6 mg/day of recombinant human insulin-like growth factor I (rhIGF-I). Serum levels of IGF-I rose from about 160 to about 500 micrograms/l. Blood glucose remained within normal limits. Stimulation tests with clonidine and with GHRH revealed suppression of endogenous GH secretion during the IGF-I infusion. Serum levels of IGF-II and of creatinine were lower in the IGF-I-infused animals. Radial length and body weight did not increase to a greater extent in the IGF-I infused dogs than in controls. However, 'adapted body mass index' (aBMI = gram body weight/(mm radial length)2) decreased in each of the IGF-I infused animals, whereas it increased in each of the control dogs (p less than 0.05). We conclude that long-term infusion of IGF-I...Continue Reading

Citations

Sep 1, 1992·Pharmacology, Biochemistry, and Behavior·T W UhdeS O Slate
Jan 1, 1992·Progress in Growth Factor Research·F C Nielsen
Dec 5, 2003·Veterinary Clinical Pathology·J P BraunA D J Watson
Dec 22, 2019·Animals : an Open Access Journal From MDPI·Victoria L ShouldiceJ Andrew B Robinson
Mar 1, 1994·The Veterinary Quarterly·R C Nap, H A Hazewinkel
May 1, 1990·Trends in Endocrinology and Metabolism : TEM·E R FroeschJ Zapf

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