Endocrine Dysfunction and Growth Hormone Deficiency in Children With Optic Nerve Hypoplasia

Children's Hospital Los Angeles

Status and phase: Completed; Phase 4

Conditions: Septo-Optic Dysplasia; Growth Hormone Deficiency; Hypopituitarism

Treatments: Drug: Nutropin AQ

Study type: Interventional

Funder types: Other; Industry

Identifiers

NCT00140413

03.261

Details and patient eligibility

About

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.

Full 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.

Enrollment: 20 patients

Sex: All

Ages: Under 5 years old

Volunteers: No Healthy Volunteers

Inclusion and exclusion criteria

Inclusion Criteria:

• New subjects diagnosed with ONH less than or equal to 2 years of age and subjects actively enrolled (in currently approved prospective ONH study) will be eligible for enrollment.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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20 participants in 2 patient groups

Treatment Group 1: Receiving GH Treatment

Experimental group

Description:

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.

Treatment:

Drug: Nutropin AQ

Treatment Group 2: Control

No Intervention group

Description:

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.