PMID- 33434161 OWN - NLM STAT- MEDLINE DCOM- 20210122 LR - 20220419 IS - 1479-683X (Electronic) IS - 0804-4643 (Print) IS - 0804-4643 (Linking) VI - 184 IP - 2 DP - 2021 Feb TI - Effectiveness and safety of rhIGF1 therapy in patients with or without Laron syndrome. PG - 267-276 LID - EJE-20-0325 [pii] LID - 10.1530/EJE-20-0325 [doi] AB - OBJECTIVE: The European Increlex(R) Growth Forum Database Registry monitors the effectiveness and safety of recombinant human insulin-like growth factor-1 (rhIGF1; mecasermin, Increlex(R)) therapy in patients with severe primary IGF1 deficiency (SPIGFD). We present data from patients with and without a reported genetic diagnosis of Laron syndrome (LS). DESIGN: Ongoing, open-label, observational registry (NCT00903110). METHODS: Children and adolescents receiving rhIGF1 therapy from 10 European countries were enrolled in 2008-2017 (n = 242). The treatment-naive/prepubertal (NPP) cohort (n = 138) was divided into subgroups based on reported genetic diagnosis of LS (n = 21) or non-LS (n = 117). Multivariate analysis of the NPP-non-LS subgroup was conducted to identify factors predictive of growth response (first-year-height standard deviation score (SDS) gain >/= 0.3). Assessments included change in height and weight over 5 years and adverse events (AEs). RESULTS: Height SDS gain from baseline was greater in the NPP-LS than the NPP-non-LS subgroup after 1 years' treatment (P < 0.05). In the NPP-non-LS subgroup, 56% were responders; young age at baseline was a positive independent predictive factor (P < 0.001). NPP-non-LS-responders and the NPP-LS subgroup had a similar mean age (6.07 years vs 7.00 years) at baseline and height SDS gain in year 1 (0.64 vs 0.70), although NPP-non-LS-responders were taller (P < 0.001) at baseline. BMI SDS changes did not differ across subgroups. Treatment-emergent AEs were experienced by 65.3% of patients; hypoglycaemia was most common. CONCLUSIONS: In most NPP children with SPIGFD, with or without LS, rhIGF1 therapy promotes linear growth. The safety profile was consistent with previous studies. FAU - Bang, Peter AU - Bang P AD - Division of Pediatrics, Department of Biomedical and Clinical Sciences, Faculty of Health Sciences, Linkoping University, Linkoping, Sweden. FAU - Woelfle, Joachim AU - Woelfle J AD - Children's Hospital, University of Erlangen, Erlangen, Germany. FAU - Perrot, Valerie AU - Perrot V AD - Ipsen Pharma, Boulogne-Billancourt, France. FAU - Sert, Caroline AU - Sert C AD - Ipsen Pharma, Boulogne-Billancourt, France. FAU - Polak, Michel AU - Polak M AD - Department of Paediatric Endocrinology, Gynaecology, and Diabetology, AP-HP, Necker-Enfants Malades University Hospital, IMAGINE Institute, University of Paris, Paris, France. LA - eng SI - ClinicalTrials.gov/NCT00903110 PT - Journal Article PT - Observational Study PL - England TA - Eur J Endocrinol JT - European journal of endocrinology JID - 9423848 RN - 0 (Recombinant Proteins) RN - 67763-96-6 (Insulin-Like Growth Factor I) RN - 7GR9I2683O (mecasermin) RN - Insulin-Like Growth Factor I Deficiency SB - IM MH - Adolescent MH - Body Height MH - Body Weight/drug effects MH - Child MH - Female MH - Growth/drug effects MH - Growth Disorders/*drug therapy MH - Hearing Loss, Sensorineural/*drug therapy MH - Humans MH - Hypoglycemia/blood/chemically induced MH - Insulin-Like Growth Factor I/*deficiency/*therapeutic use MH - Laron Syndrome/*drug therapy/genetics MH - Longitudinal Studies MH - Male MH - Patient Safety MH - Puberty MH - Recombinant Proteins/*therapeutic use MH - Treatment Outcome MH - Young Adult PMC - PMC7849377 EDAT- 2021/01/13 06:00 MHDA- 2021/01/23 06:00 PMCR- 2021/02/01 CRDT- 2021/01/12 17:19 PHST- 2020/04/17 00:00 [received] PHST- 2020/11/17 00:00 [accepted] PHST- 2021/01/13 06:00 [pubmed] PHST- 2021/01/23 06:00 [medline] PHST- 2021/01/12 17:19 [entrez] PHST- 2021/02/01 00:00 [pmc-release] AID - EJE-20-0325 [pii] AID - 10.1530/EJE-20-0325 [doi] PST - ppublish SO - Eur J Endocrinol. 2021 Feb;184(2):267-276. doi: 10.1530/EJE-20-0325.