Conditions: Growth Hormone Deficiency Septo-Optic Dysplasia Hypopituitarism
Keywords: Optic Nerve Hypoplasia
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 20
Healthy volunteers: no

Brief summary:
Hypotheses:

1. The prevalence of endocrinopathies, and growth hormone (GH) deficiency in particular, among young children diagnosed with optic nerve hypoplasia (ONH) is higher than is commonly thought.
2. Early treatment of children with ONH and GH-deficiency can prevent adverse outcomes.

Aims:

1. Determine the prevalence and types of endocrinopathies in children diagnosed with ONH.
2. Correlate endocrine outcome with radiographic, ocular, and developmental findings in children with ONH.
3. Examine the effect of GH treatment on growth and obesity in children with ONH, GH-deficiency, and either subnormal or normal growth compared to children with ONH that are not GH-deficient.
4. Compare growth outcomes between children with isolated GH-deficiency and those with multiple hormone deficiencies.

Detailed description:
Subjects for this study will be recruited from active and newly enrolled subjects in our larger ONH study. The study duration is three years and we anticipate 38 subjects will enroll. Subjects will be recruited for this study if they present with either growth deceleration or at least one subnormal result for IGF-1 or IGFBP-3.

Baseline information collected includes: height, weight, head circumference, examinations by an endocrinologist and ophthalmologist, endocrine laboratory testing, fundus photography, electrophysiology testing, head MRI, and a developmental assessment. A glucagon stimulation test will be performed and subjects who are deemed GH-deficient and who have delayed growth will be assigned to GH treatment, in line with standard clinical practice. Those with normal growth but determined to be GH-deficient by a glucagon stimulation test will be randomized to treatment with GH vs control (no intervention; observation only).

Subjects assigned or randomized to treatment with GH will be provided with GH for the duration of their participation in the study. Enrolled subjects will return every four months to monitor progress. Subjects will undergo a physical examination at each visit, including height, weight, head circumference, and body fat. In addition, subjects assigned or randomized to growth hormone will have laboratory testing of thyroid, IGF-1 and IGFBP-3 hormones, and fasting lipid levels.

Arms:
arm 1: Treatment group assignment was based on subject's stature SDS relative to the mid-parental target height (MPTH) at baseline and subsequent classification as growth deceleration or normal growth. Subjects with growth deceleration were assigned to the GH treatment group in accordance with standard of care. Subjects with normal growth were randomized to treatment or to control (no intervention). The intervention was Nutropin AQ. The starting dose was calculated as 0.3 mg/kg/wk and subsequently modified based on observed length/height velocity and serum IGF-I levels. arm 2: Treatment group assignment was based on subject's stature SDS relative to the mid-parental target height (MPTH) at baseline and subsequent classification as growth deceleration or normal growth. Subjects with normal growth were randomized to treatment or to control. The control group received no intervention; however, control subjects were switched (crossed over) to the GH replacement group if, during the course of the study, they met criteria for growth deceleration.

Interventions: intervention 1: Nutropin AQ
Intervention descriptions: intervention 1: Daily injection. Dosage dependent on weight.

Protocol document: