ArticleJournal of endocrinological investigation2026
Optimization of dosing regimens for the long-acting growth hormone pegpesen: A population PK/PD modeling approach.
Article in Journal of endocrinological investigation, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeLong-acting growth hormone (LAGH) provides a convenient treatment for children with growth hormone deficiency (GHD), but challenges such as waning growth velocity (GV) and dosing inflexibility persist. This study aimed to explore optimized dosing strategies for Pegpesen, a novel LAGH, using population pharmacokinetic/pharmacodynamic (PopPK/PD) modeling to improve therapeutic outcomes.
methodsA PopPK/PD model was developed using data from Phase 1–3 trials of Pegpesen. Two strategies were simulated in 292 GHD patients: (1) Dose up-titration, starting at 0.14 mg/kg/week and increasing by 12.3%, 18.9%, and 26.0% every 3 months to a maximum of 0.28 mg/kg/week. (2) Weight-banded dosing, evaluating the suitability of fixed doses for children within ± 1.78 kg and ± 3.57 kg of a target weight (fixed dose/0.14 kg). Primary evaluation metrics included 12- and 24-month GV, IGF-1 levels, and PK/PD profiles.
resultsThe up-titration strategy dose-dependently increased 12-month GV (9.51–9.88 cm/year), which then converged by 24 months, suggesting that saturation was reached before the second year of treatment. IGF-1 levels remained within safe range. For weight-banded dosing, PK/PD profiles for subjects within ± 1.78 kg of the target weight were comparable to standard weight-based dosing, whereas profiles for the ± 3.57 kg range showed significant divergence.
conclusionThis PopPK/PD model for LAGH Pegpesen in GHD children proposes a dose up-titration regimen that effectively counteracts declining GV while maintaining safety, and a simplified weight-banded dosing system that enhances treatment convenience without compromising efficacy.
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