Conditions: Growth Disorders Insulin-Like Growth Factor-1 Deficiency
Keywords: Primary IGF-1 Deficiency
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 137
Healthy volunteers: no

Brief summary:
This study is intended to determine whether twice daily weight based dosing with recombinant human insulin-like growth factor (rhIGF-1) will safely and effectively increase the growth of prepubertal children with short stature associated with low IGF-1 levels but who produce sufficient growth hormone (GH). Subjects will be randomized to either an observation arm or to active treatment.

Detailed description:
Prepubertal growth failure associated with primary IGF-1 deficiency (IGFD). Primary IGFD is a term that has been used to describe patients with intrinsic cellular defects in GH action. In this protocol, primary IGFD is defined as short stature (height standard deviation score\[SDS\]\<-2 below the mean for age and gender), low serum IGF-1 (IGF-1 SDS \<-2 below the mean for age and gender), and levels of growth hormone (GH) that are normal (≥7ng/mL) after a GH stimulation test. Primary IGFD is believed to result from a lower than normal ability to produce IGF-1 when exposed to normal levels of GH, i.e., a type of GH insensitivity or GH resistance.

This trial is one year, randomized, open label, observation-controlled, parallel-dose comparison efficacy and safety study conducted in approximately 40 centers across the United States.

Arms:
arm 1: Observational Group arm 2: Injection of rhIGF-1 40 μg/kg BID. Per protocol amendment these subjects were reassigned to receive 120 μg/kg BID. Due to the dose change, the efficacy results for these subjects were analysed in a separate subanalysis. For all outcome measures, mean and standard deviations were not calculated for this arm. arm 3: Injection of rhIGF-1 80 μg/kg BID arm 4: Injection of rhIGF-1 120 μg/kg BID

Interventions: intervention 1: rhIGF-1 (mecasermin, Tercica, Inc.)
Intervention descriptions: intervention 1: Twice Daily Injection

Protocol document: