Beatrice Klinger

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Nine prepubertal children with Laron syndrome (6 males, 3 females) aged 0.5 to 14.6 years were treated by daily subcutaneous injections of IGF-I in doses of 150-200 micrograms/kg. All patients completed at least one year of treatment; six completed two years and five three years. During the first year, a significant increase in linear growth velocity, from(More)
Insulin-like growth factor binding protein-3 (IGFBP-3) is the major carrier of insulin-like growth factor I (IGF-I) in serum, and its production is growth hormone (GH) dependent. It is unclear whether in humans IGFBP-3 production is directly regulated by GH or mediated via IGF-I. We addressed this question in six patients with Laron-type dwarfism, a(More)
OBJECTIVE Patients with Laron syndrome (LS) can now be treated with recombinant IGF-I. We describe the development of androgenization during IGF-I treatment of female LS patients. PATIENTS Six female patients with LS--two clinically prepubertal (11.6 and 13.8 years of age) and four young adults (30 to 39 years old)--underwent long-term replacement(More)
Serum gonadotrophins. androgens, insulin and insulin-like growth factor-I (IGF-I) were determined before and during long-term treatment with recombinant IGF-I of seven males with Laron syndrome, and the changes correlated with changes in testicular volume and penile size. The subjects were four boys below the age of 5, two boys aged 10 and 14 but(More)
Biosynthetic insulin-type growth factor I (IGF-I) was given as an intravenous bolus of 75 micrograms/kg to 9 patients with Laron-type dwarfism. Rapid onset of hypoglycaemia (-45% of basal level) was associated with a reduction in plasma insulin (-55% of basal level); thus, the lack of growth hormone receptors in this condition does not apply to IGF-I(More)
Laron syndrome (LS) is a hereditary form of GH resistance due to molecular defects in the GH receptor (GHR). Most of the identified mutations are located in the extracellular domain of the receptor, resulting in a lack of serum GHBP in the majority of LS patients. We present an LS patient with supranormal levels of serum GHBP, in addition to 35 of her(More)
Muscle force and endurance of four muscle groups (biceps, triceps, hamstrings and quadriceps) were measured by a computerized device in three groups: (A) 4 boys with isolated growth hormone deficiencies (IGHD) examined before at 10 and 24 months of hGH treatment; (B) 5 children (2 F, 3 M) with Laron syndrome were examined 3.5-4 years after initiation of(More)
BACKGROUND Elevated serum lipoprotein(a) (Lp(a)) is a strong risk factor for coronary artery disease (CAD). Genetic factors appear to account for the major variance in Lp(a) levels but the contribution hormones make in modulating Lp(a) levels is not yet clear. In the present investigation we determined the effects of human growth hormone (hGH) and(More)
OBJECTIVE The serum level of sex hormone binding globulin (SHBG) changes inversely with that of both insulin and insulin-like growth factor (IGF-I), during several nutritional conditions, as well as in response to GH treatment. However, with exogenous IGF-I administration, endogenous IGF-I increases, while insulin decreases. In order to study the separate(More)
Recombinant IGF-I was administered as an iv bolus of 75 micrograms/kg to 10 patients with Laron type dwarfism (3 children aged 9, 11 and 12 years and 7 adults aged 30.6 +/- 3.5 years) and to 8 healthy subjects (mean age 19.9 +/- 12.1 years) and determinations of IGF-I, GHRH, hGH, TSH, and glucose were made before and at 2, 5, 15, 30, 60, 90, and 120 min.(More)