Real-World Efficacy of Weekly Somatrogon on Growth and Bone Health in Pediatric Growth Hormone Deficiency: A 12-Month Retrospective Cohort Study.

OBJECTIVE

Growth hormone deficiency (GHD) in children results in short stature and impaired bone health. While daily growth hormone (GH) injections are effective, they are associated with adherence challenges. Somatrogon, a long-acting, recombinant human GH (rhGH), allows weekly administration, potentially improving treatment compliance.

METHODS

This retrospective cohort study included prepubertal children with GHD treated with weekly Somatrogon at Al Jalila Children’s Hospital, Dubai. Diagnosis was based on clinical, biochemical, and radiological criteria, including height standard deviation score (SDS) <-2.0, subnormal growth velocity, and subnormal peak GH in one stimulation test (<10 ng/mL), supported by low IGF-1 and/or abnormal cranial magnetic resonance imaging. Growth outcomes and bone health indices were assessed over 12 months using auxology, insulin-like growth factor 1 (IGF-1) levels, and BoneXpert-derived bone health index (BHI) SDS and Metacarpal Index (MCI) SDS.

RESULTS

The study cohort consisted of 39 children with GHD. After 12 months of therapy, mean height SDS improved significantly from -2.16±0.80 to -1.65±0.71 (p<0.001). IGF-1 SDS rose from -1.38±1.02 to 0.88±1.57 (p<0.001). Adult predicted height and BHI SDS also improved significantly (p=0.005 and p<0.001, respectively). No significant changes were observed in bone age SDS or MCI SDS.

CONCLUSION

Weekly Somatrogon significantly improved linear growth, IGF-1 levels, and measures of cortical bone health without advancing bone age in children with GHD. These findings support the efficacy of this form of long-acting GH therapy and its potential to optimize growth and skeletal outcomes in clinical practice.