1
|
Yuen KCJ. Utilizing Somapacitan, a Long-acting Growth Hormone Formulation, for the Treatment of Adult Growth Hormone Deficiency: A Guide for Clinicians. Endocr Pract 2024:S1530-891X(24)00600-1. [PMID: 38992799 DOI: 10.1016/j.eprac.2024.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Revised: 06/27/2024] [Accepted: 07/05/2024] [Indexed: 07/13/2024]
Abstract
OBJECTIVE Somapacitan is the first approved and currently the only long-acting growth hormone (GH) formulation in the United States for treatment of adults with growth hormone deficiency (GHD). The aim of this review was to provide a practical approach for clinicians on how to utilize somapacitan in the treatment of adults with GHD. METHODS Literature search was performed on PubMed using key words, including adult GHD, long-acting growth hormone, somapacitan, treatment, and management. The discussion of treatment aspects utilizing somapacitan was based on evidence from previous clinical studies and personal experience. RESULTS Clinical trial data demonstrated that somapacitan, a once-weekly reversible albumin-binding GH derivative, decreased truncal fat, improved visceral fat and lean body mass, increased insulin-like growth factor-I standard deviation score and exerted neutral effects on glucose metabolism. Overall, somapacitan was well-tolerated, adverse event rates were comparable with daily GH, antisomapacitan or anti-GH antibodies were not detected, and treatment satisfaction was in favor of somapacitan vs daily GH. CONCLUSION Somapacitan is an efficacious, safe, convenient and well-tolerated once-weekly long-acting GH formulation that reduces the treatment burden of once-daily GH injections for adults with GHD. This article provides a review of the pharmacology of somapacitan and offers practical recommendations based on previous clinical trial data on how to initiate, dose titration, monitoring and dose adjustments whilst on therapy in adults with GHD. Timing of measurement of serum insulin-like growth factor-I levels, information on administration, recommendations on missed doses, and clinical recommendations on dosing in certain sub-population of patients are also discussed.
Collapse
Affiliation(s)
- Kevin C J Yuen
- Barrow Pituitary Center, Barrow Neurological Institute, Departments of Neuroendocrinology and Neurosurgery, University of Arizona College of Medicine and Creighton School of Medicine, Phoenix, Arizona.
| |
Collapse
|
2
|
Dombernowsky SL, Damholt BB, Højby Rasmussen M, Sværke C, Kildemoes RJ. Investigating the Bioavailability and Insulin-like Growth Factor-I Release of Two Different Strengths of Somapacitan: A Randomised, Double-Blind Crossover Trial. Clin Pharmacokinet 2024; 63:1015-1024. [PMID: 38969919 PMCID: PMC11271340 DOI: 10.1007/s40262-024-01395-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/10/2024] [Indexed: 07/07/2024]
Abstract
STUDY DESIGN AND OBJECTIVE Randomised, double-blind, crossover trial to confirm bioequivalence of somapacitan, a long-acting growth hormone (GH), in 5 mg/1.5 mL and 10 mg/1.5 mL strengths in equimolar doses. METHODS Healthy participants were randomised (1:1:1) to subcutaneous somapacitan treatment in one dosing period with 5 mg/1.5 mL and two periods with 10 mg/1.5 mL. Eligibility criteria included age 18-45 years and body mass index 18.5-24.9 kg/m2. Exclusion criteria included history of GH deficiency, previous GH treatment, weight > 100.0 kg and participation in any clinical trial of an investigational medicinal product within 45 days or five times the half-life of the previous investigational product before screening. Area under the curve from time 0 until last quantifiable observation (AUC0-t), maximum serum concentration (Cmax), time to Cmax and terminal half-life of somapacitan and safety were assessed. RESULTS In total, 33 participants were randomised. For AUC0-t, estimated treatment ratio (ETR) (5 mg/1.5 mL versus 10 mg/1.5 mL) was 0.95 (90% confidence interval [CI] 0.89-1.01). Point estimate and 90% CIs were within the acceptance range (0.80-1.25). For Cmax, ETR was 0.77 (90% CI 0.68-0.89). Point estimate and 90% CIs were outside the acceptance range (0.80-1.25). Mean insulin-like growth factor-I (IGF-I) and IGF-I standard deviation score concentration-time curves for each strength were almost identical. No new safety issues were identified. CONCLUSIONS Bioequivalence criterion for somapacitan 5 mg/1.5 mL and 10 mg/1.5 mL was met for AUC0-t but not for Cmax. The two strengths had equivalent IGF-I responses. TRIAL REGISTRATION ClinicalTrials.gov, NCT03905850 (3 April 2019).
Collapse
Affiliation(s)
| | | | | | - Claus Sværke
- Novo Nordisk A/S, Vandtårnsvej 108, 2860, Søborg, Denmark
| | | |
Collapse
|
3
|
Mori J, Ohata Y, Fujisawa Y, Sato Y, Röhrich S, Rasmussen MH, Bang RB, Horikawa R. Effective growth hormone replacement with once-weekly somapacitan in Japanese children with growth hormone deficiency: Results from REAL4, a phase 3 clinical trial. Clin Endocrinol (Oxf) 2024; 100:389-398. [PMID: 38368603 DOI: 10.1111/cen.15025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/21/2023] [Accepted: 01/21/2024] [Indexed: 02/20/2024]
Abstract
OBJECTIVE Somapacitan is a long-acting growth hormone (GH) derivative developed for the treatment of GH deficiency (GHD). This study evaluates the efficacy and tolerability of somapacitan in Japanese children with GHD after 104 weeks of treatment and after switch from daily GH. DESIGN Subanalysis on Japanese patients from a randomised, open-labelled, controlled parallel-group phase 3 trial (REAL4, NCT03811535). PATIENTS AND MEASUREMENTS Thirty treatment-naïve patients were randomised 2:1 to somapacitan (0.16 mg/kg/week) or daily GH (0.034 mg/kg/day) up to Week 52, after which all patients received somapacitan. Height velocity (HV; cm/year) at Weeks 52 and 104 were the primary measurements. Additional assessments included HV SD score (SDS), height SDS, bone age, insulin-like growth factor-I (IGF-I) SDS, and observer-reported outcomes. RESULTS At Week 52, observed mean HV was similar between treatment groups (10.3 vs. 9.8 cm/year for somapacitan and daily GH, respectively). Similar HVs between groups were also observed at Week 104: 7.4 cm/year after continuous somapacitan treatment (soma/soma) and 7.9 cm/year after 1-year somapacitan treatment following switch from daily GH (switch). Other height-related endpoints supported continuous growth. IGF-I SDS increased in both groups with mean IGF-I SDS within -2 and +2 during the study. Somapacitan was well tolerated, one mild injection site reaction was reported, with no reports of injection site pain. Patient preference questionnaires showed that most patients and their caregivers (90.9%) who switched treatment at Week 52 preferred once-weekly somapacitan over daily GH treatment. CONCLUSIONS Somapacitan showed sustained efficacy in Japanese children with GHD over 104 weeks and for 52 weeks after switching from daily GH. Somapacitan was well tolerated and preferred over daily GH.
Collapse
Affiliation(s)
- Jun Mori
- Division of Pediatric Endocrinology and Metabolism, Children's Medical Center, Osaka City General Hospital, Osaka, Japan
| | - Yasuhisa Ohata
- Department of Pediatrics, Osaka University Graduate School of Medicine, Suita, Japan
| | - Yasuko Fujisawa
- Department of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yukihito Sato
- Rare Disease Group, Novo Nordisk Pharma Ltd., Tokyo, Japan
| | - Sebastian Röhrich
- Global Medical Affairs, Novo Nordisk Health Care AG, Zürich, Switzerland
| | - Michael Højby Rasmussen
- Medical and Science, Rare Disease and Advanced Therapies, Clinical Drug Development, Novo Nordisk A/S, Søborg, Denmark
| | - Rikke Beck Bang
- Biostatistics, Rare Disease and Advanced Therapies, Data Science, Novo Nordisk A/S, Aalborg, Denmark
| | - Reiko Horikawa
- Division of Endocrinology and Metabolism, National Center for Child Health and Development, Tokyo, Japan
| |
Collapse
|
4
|
Miller BS, Blair J, Horikawa R, Linglart A, Yuen KCJ. Developments in the Management of Growth Hormone Deficiency: Clinical Utility of Somapacitan. Drug Des Devel Ther 2024; 18:291-306. [PMID: 38333899 PMCID: PMC10849900 DOI: 10.2147/dddt.s315172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 01/11/2024] [Indexed: 02/10/2024] Open
Abstract
Growth hormone (GH) replacement therapy for growth hormone deficiency (GHD) in children and adults has for over 25 years, until recently, been administered as daily injections. This daily treatment regimen often incurs a burden to patients and caregivers, leading to high rates of non-adherence and, consequently, decreased treatment efficacy outcomes. To address this shortcoming, long-acting growth hormones (LAGHs) have been developed with the aim of reducing the burden of daily injections, thereby potentially improving treatment adherence and outcomes. Somapacitan (Sogroya®) (Novo Nordisk, Bagsværd, Denmark) is a LAGH currently approved for the treatment of adult and childhood GHD (AGHD and CGHD, respectively) in several countries. Other LAGHs, such as somatrogon (Ngenla®) (Pfizer, New York, United States) and lonapegsomatropin/TransCon GH (Skytrofa®) (Ascendis Pharma, Copenhagen, Denmark), are also currently approved and available for the treatment of CGHD in several countries. In this review, we will consider the method of protraction, pharmacokinetics (PK) and pharmacodynamics (PD), efficacy, and safety results of somapacitan in adult and pediatric trials and how these characteristics differ from those of the other aforementioned LAGHs. Additionally, the administration of somapacitan and timing of measurement of serum insulin-like growth factor-I (IGF-I) levels are summarized. Information on administration, advice on missed doses, and clinical guidelines are discussed, as well as identifying which patients are suitable for somapacitan therapy, and how to monitor and adjust dosing whilst on therapy.
Collapse
Affiliation(s)
- Bradley S Miller
- Division of Pediatric Endocrinology, University of Minnesota Medical School, MHealth Fairview Masonic Children’s Hospital, Minneapolis, MN, USA
| | - Jo Blair
- Department of Paediatric Endocrinology, Alder Hey Children’s NHS Foundation Trust, Liverpool, UK
| | - Reiko Horikawa
- Division of Endocrinology and Metabolism, National Center for Child Health and Development, Tokyo, Japan
| | - Agnès Linglart
- Department of Endocrinology and Diabetes for Children, Hospital Bicêtr Paris Saclay, AP-HP, Le Kremlin-Bicêtre, France
- Unité 1185, INSERM, Paris, France
- Reference Center for Rare Pituitary Disorders, Hospital Bicêtre Paris Saclay, AP-HP, Le Kremlin-Bicêtre, France
- Platform of Expertise for Rare Diseases, OSCAR Network, Hospital Bicêtre Paris Saclay, AP-HP, Le Kremlin-Bicêtre, France
| | - Kevin C J Yuen
- Departments of Neuroendocrinology and Neurosurgery, Barrow Neurological Institute, University of Arizona College of Medicine and Creighton School of Medicine, Phoenix, AZ, USA
| |
Collapse
|
5
|
Miller BS, Blair JC, Rasmussen MH, Maniatis A, Mori J, Böttcher V, Kim HS, Bang RB, Polak M, Horikawa R. Effective GH Replacement With Somapacitan in Children With GHD: REAL4 2-year Results and After Switch From Daily GH. J Clin Endocrinol Metab 2023; 108:3090-3099. [PMID: 37406251 PMCID: PMC10655534 DOI: 10.1210/clinem/dgad394] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/28/2023] [Accepted: 06/30/2023] [Indexed: 07/07/2023]
Abstract
CONTEXT Somapacitan is a long-acting GH derivative for treatment of GH deficiency (GHD). OBJECTIVE Evaluate the efficacy and tolerability of somapacitan in children with GHD after 2 years of treatment and after the switch from daily GH. DESIGN A randomized, multinational, open-labelled, controlled parallel group phase 3 trial, comprising a 52-week main phase and 3-year safety extension (NCT03811535). SETTING Eighty-five sites across 20 countries. PATIENTS A total of 200 treatment-naïve prepubertal patients were randomized and exposed; 194 completed the 2-year period. INTERVENTIONS Patients were randomized 2:1 to somapacitan (0.16 mg/kg/wk) or daily GH (0.034 mg/kg/d) during the first year, after which all patients received somapacitan 0.16 mg/kg/wk. MAIN OUTCOME MEASURES Height velocity (HV; cm/year) at week 104. Additional assessments included HV SD score (SDS), height SDS, IGF-I SDS, and observer-reported outcomes. RESULTS HV was sustained in both groups between 52 and 104 weeks. At week 104, mean (SD) for HV between weeks 52 and 104 was 8.4 (1.5) cm/year after continuous somapacitan treatment and 8.7 (1.8) cm/year after 1 year of somapacitan treatment following switch from daily GH. Secondary height-related endpoints also supported sustained growth. Mean IGF-I SDS during year 2 was similar between groups and within normal range (-2 to +2). Somapacitan was well tolerated, with no safety or tolerability issues identified. GH patient preference questionnaire results show that most patients and their caregivers (90%) who switched treatment at year 2 preferred once-weekly somapacitan over daily GH treatment. CONCLUSIONS Somapacitan in children with GHD showed sustained efficacy and tolerability for 2 years, and after switching from daily GH. Patients/caregivers switching from daily GH expressed a preference for somapacitan. CLINICAL TRIAL REGISTRATION NCT03811535.
Collapse
Affiliation(s)
- Bradley S Miller
- Division of Pediatric Endocrinology, University of Minnesota Medical School, MHealth Fairview Masonic Children's Hospital, Minneapolis, MN 55454, USA
| | - Joanne C Blair
- Department of Endocrinology, Alder Hey Children's NHS Foundation Trust, Liverpool, L14 5AB, UK
| | | | | | - Jun Mori
- Division of Pediatric Endocrinology and Metabolism, Children's Medical Center, Osaka City General Hospital, Osaka 534-0021, Japan
| | - Volker Böttcher
- Division of Pediatric Endocrinology and Metabolism, MVZ Endokrinologikum Frankfurt am Main, Frankfurt 60596, Germany
| | - Ho-Seong Kim
- Department of Pediatrics, Severance Children's Hospital, Institute of Endocrinology, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Rikke Beck Bang
- Biostatistics Rare Disease and Advanced Therapies, Novo Nordisk A/S, Aalborg 9220, Denmark
| | - Michel Polak
- Service d’Endocrinologie, Gynécologie et Diabétologie Pédiatriques, Hôpital Universitaire Necker Enfants Malades Paris, Assistance Publique-Hôpitaux de Paris, Paris 75015, France
| | - Reiko Horikawa
- Division of Endocrinology and Metabolism, National Center for Child Health and Development, Tokyo 157-0074, Japan
| |
Collapse
|
6
|
Grillo MS, Frank J, Saenger P. Long acting growth hormone (LAGH), an update. Front Pediatr 2023; 11:1254231. [PMID: 37842029 PMCID: PMC10569466 DOI: 10.3389/fped.2023.1254231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 08/30/2023] [Indexed: 10/17/2023] Open
Abstract
In 1957, Maurice Raben at Yale was able to isolate and purify growth hormone from cadaveric pituitary glands. Pituitary growth hormone was the only way to treat children with growth hormone (GH) deficiency, until 1985 when recombinant GH became available for daily subcutaneous injection. For many years, the pediatric endocrine community longed for a long-acting recombinant GH formulation that would decrease the inconvenience of daily injections. Several mechanisms were employed to develop a GH that is rapidly absorbed into the blood stream after subcutaneous injection, but provides slow removal from the circulatory system to potentially optimize patient adherence to GH therapy. Four long-acting growth hormones are currently available in the world, or are close to regulatory approval. They are: (1) Pegylated formulations, (2) Prodrug formulations which are converted into active drug, (3) Nonvalent transient albumin binding GH compounds and (4) GH fusion proteins where a protein si fused with GH. All four formulations have undergone detailed phase 3 studies and were found to show non-inferiority in these clinical studies. All four demonstrate a safety and tolerability profile that is comparable to that of daily somatropin with an excellent adherence profile.
Collapse
|
7
|
Hou L, Huang K, Gong C, Luo F, Wei H, Liang L, Du H, Zhang J, Zhong Y, Chen R, Chen X, Pan J, Jin X, Zeng T, Liao W, Liu D, Lan D, Zhu S, Dong Z, Ma H, Yang Y, Xiong F, Lu P, Cheng S, Gu X, Jin R, Liu Y, Wu J, Xu X, Chen L, Dong Q, Pan H, Su Z, Liu L, Luo X, Ni S, Chen Z, Hu Y, Wang C, Liu J, Liu L, Lu B, Wang X, Wang Y, Yang F, Zhang M, Cao L, Liu G, Yao H, Zhan Y, Dai M, Li G, Li L, Liu Y, Wang K, Xiao Y, Zhang X, Dong J, Gu Z, Ying L, Huang F, Liu Y, Liu Z, Ye J, Zhao D, Hu X, Jiang Z, Ye K, Zhu H, Chen S, Chen X, Wan N, Xu Z, Yin Q, Zhang H, Huang X, Yin J, Zhang H, Li P, Yin P, Fu J, Luo X. Long-term Pegylated GH for Children With GH Deficiency: A Large, Prospective, Real-world Study. J Clin Endocrinol Metab 2023; 108:2078-2086. [PMID: 36669772 PMCID: PMC10348466 DOI: 10.1210/clinem/dgad039] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 01/18/2023] [Accepted: 01/18/2023] [Indexed: 01/22/2023]
Abstract
CONTEXT The evidence of long-term polyethylene glycol recombinant human GH (PEG-rhGH) in pediatric GH deficiency (GHD) is limited. OBJECTIVE This study aimed to examine the effectiveness and safety of long-term PEG-rhGH in children with GHD in the real world, as well as to examine the effects of dose on patient outcomes. DESIGN A prospective, observational, posttrial study (NCT03290235). SETTING, PARTICIPANTS AND INTERVENTION Children with GHD were enrolled from 81 centers in China in 4 individual clinical trials and received weekly 0.2 mg/kg/wk (high-dose) or 0.1 to <0.2 mg/kg/wk (low-dose) PEG-rhGH for 30 months. MAIN OUTCOMES MEASURES Height SD score (Ht SDS) at 12, 24, and 36 months. RESULTS A total of 1170 children were enrolled in this posttrial study, with 642 patients in the high-dose subgroup and 528 in the low-dose subgroup. The Ht SDS improved significantly after treatment in the total population (P < 0.0001), with a mean change of 0.53 ± 0.30, 0.89 ± 0.48, 1.35 ± 0.63, 1.63 ± 0.75 at 6 months, 12 months, 24 months, and 36 months, respectively. In addition, the changes in Ht SDS from baseline were significantly improved in the high-dose subgroup compared with the low-dose subgroup at 6, 12, 24, and 36 months after treatment (all P < 0.05). A total of 12 (1.03%) patients developed serious adverse events. There was no serious adverse event related to the treatment, and no AEs leading to treatment discontinuation or death occurred. CONCLUSIONS PEG-rhGH showed long-term effectiveness and safety in treating children with GHD. Both dose subgroups showed promising outcomes, whereas PEG-rhGH 0.2 mg/kg/wk might show additional benefit.
Collapse
Affiliation(s)
- Ling Hou
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Ke Huang
- Department of Endocrinology, National Clinical Research Center for Child Health, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou 310052, China
| | - Chunxiu Gong
- Department of Endocrine and Genetics and Metabolism, Beijing Children's Hospital, Capital Medical University, National Centre for Children's Health, Beijing 100045, China
| | - Feihong Luo
- Department of Pediatric Endocrinology and Inherited Metabolic Diseases, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Haiyan Wei
- Department of Endocrinology and Metabolism, Genetics, Henan Children's Hospital (Children's Hospital Affiliated to Zhengzhou University), Zhengzhou 450018, China
| | - Liyang Liang
- Department of Pediatrics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Hongwei Du
- Department of Paediatrics, First Hospital of Jilin University, Changchun 130021, China
| | - Jianping Zhang
- Department of Pediatrics, Ningbo Women & Children's Hospital, Ningbo 315012, China
| | - Yan Zhong
- Department of Child Health Care, Hunan Children's Hospital, Changsha 410007, China
| | - Ruimin Chen
- Department of Endocrinology, Genetics and Metabolism, Fuzhou Children's Hospital of Fujian Medical University, Fuzhou 350005, China
| | - Xinran Chen
- Department of Pediatric Endocrine Genetics and Metabolism, Chengdu Women's and Children's Center Hospital, Chengdu 610074, China
| | - Jiayan Pan
- Department of Pediatrics, Wuhu First People's Hospital, Wuhu 241000, China
| | - Xianjiang Jin
- Department of Genetics and Endocrinology, The Second Affiliated Hospital &Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Ting Zeng
- Department of Child Health Care, Liuzhou Maternilty and Child Heulthcare Hospital, Liuzhou, Guangxi 545001, China
| | - Wei Liao
- Department of Pediatrics, First Affiliated Hospital of Army Medical University (Thrid Military Medical University), Chongqing 400038, China
| | - Deyun Liu
- Department of Pediatrics, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, China
| | - Dan Lan
- Department of Pediatrics, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Shunye Zhu
- Department of Pediatrics, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510630, China
| | - Zhiya Dong
- Department of Pediatrics, Ruijin Hospital, Shanghai Jiao-Tong University, School of Medicine, Shanghai 200025, China
| | - Huamei Ma
- Department of Pediatrics, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - Yu Yang
- Department of Endocrinology and Genetics, Jiangxi Provincial Children's Hospital, Affiliated Children's Hospital of Nanchang University, Nanchang 330006, China
| | - Feng Xiong
- Department of Endocrinology, Children's Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Ping Lu
- Department of Pediatrics, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Shengquan Cheng
- Department of Pediatrics, First Affiliated Hospital of Air Force Medical University, Xi’an 710032, China
| | - Xuefan Gu
- Department of Pediatric Endocrinology and Genetic Metabolism, Xinhua Hospital, Shanghai Institute for Pediatric Research, School of Medicine, Shanghai Jiao Tong University, Shanghai 200092, China
| | - Runming Jin
- Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yu Liu
- Department of Endocrine and Genetic Metabolism, Maternal and Child Health-Care Hospital in Guiyang, Guiyang 550003, China
| | - Jinzhun Wu
- Department of Pediatrics, the First Affiliated Hospital of Xiamen University, Xiamen 361003, China
| | - Xu Xu
- Department of Endocrinology, Wuxi Children's Hospital, Wuxi 214023, China
| | - Linqi Chen
- Depatment of Endocrinology, Children's Hospital of Soochow University, Suzhou 215025, China
| | - Qin Dong
- Department of Pediatrics, Zhejiang Hospital of Traditional Chinese Medicine, Hangzhou 310000, China
| | - Hui Pan
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Zhe Su
- Department of Endocrinology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - Lijun Liu
- Department of Endocrinology, Genetics and Metabolism, Hebei Children's Hospital, Shijiazhuang 050031, China
| | - Xiaoming Luo
- Department of Pediatrics, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Shining Ni
- Department of Endocrinology, Children's Hospital of Nanjing Medical University, Nanjing 210008, China
| | - Zhihong Chen
- Department of Pediatric Endocrinology, Metabolism & Gastroenterology, The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - Yuhua Hu
- Department of Pediatrics, The First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
| | - Chunlin Wang
- Department of Pediatrics, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Jing Liu
- Department of Pediatrics, Changchun Children's Hospital, Changchun, Jilin 130000, China
| | - Li Liu
- Department of Genetics and Endocrinology, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
| | - Biao Lu
- Department of Pediatrics, General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - Xinli Wang
- Department of Pediatric, Peking University Third Hospital, Beijing 100191, China
| | - Yunfeng Wang
- Department of Pediatrics, China-Japan Friendship Hospital, Beijing 100029, China
| | - Fan Yang
- Department of Pediatrics, West China Second Hospital, Sichuan University, Chengdu 610041, China
| | - Manyan Zhang
- Department of Pediatrics, Shaoxing Second Hospital, Shaoxing 312000, China
| | - Lizhi Cao
- Department of Pediatrics, Xiangya Hospital, Central South University, Changsha 410008, China
| | - GeLi Liu
- Department of Pediatrics, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Hui Yao
- Department of Endocrinology and Metabolism, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430015, China
| | - Yaqin Zhan
- Department of Child Health, Maternal and Child Health Care Hospital of Hainan Province, Haikou 570206, China
| | - Mingjuan Dai
- Department of Pediatrics, Hangzhou First People's Hospital, Hangzhou 310022, China
| | - Guimei Li
- Department of Pediatrics, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
| | - Li Li
- Department of Pediatrics, The 1st People's Hospital of Yunnan Province, Kunming 650032, China
| | - Yanjie Liu
- Department of Pediatrics, Inner Mongolia People's Hospital, Hohhot Inner Mongolia 010017, China
| | - Kan Wang
- Department of Pediatrics, Jinhua Hospital, Zhejiang University School of Medicine, Jinhua 321000, China
| | - Yanfeng Xiao
- Department of Pediatrics, The 2nd Affiliated Hospital of Medical College of Xi’an Jiaotong University, Xi’an 710004, China
| | - Xingxing Zhang
- Department of Pediatrics, the Second Xiangya Hospital, Central South University, Changsha 410011, China
| | - Junhua Dong
- Department of Pediatrics, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Zaiyan Gu
- Department of Pediatrics, Jiaxing First Hospital, Jiaxing 314000, China
| | - Lirong Ying
- Department of Pediatrics, Cixi People's Hospital, Cixi 315300, China
| | - Feng Huang
- Department of Pediatrics, Affiliated Hospital of Nantong University, Nantong 226000, China
| | - Yanling Liu
- Department of Pediatrics, the Second Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Zheng Liu
- Department of Pediatrics, Tai’an Maternal and Child Health Care Hospital, Tai’an, Shandong 271000, China
| | - Jin Ye
- Department of Pediatrics, Jiangsu Province Hospital of Chinese Medicine, Nanjing 210029, China
| | - Dongmei Zhao
- Pediatric Research Institute, Qilu Children's Hospital of Shandong University, Jinan, Shandong 250022, China
| | - Xu Hu
- Department of Pediatrics, Lu’an People's Hospital, Lu’an 237000, China
| | - Zhihong Jiang
- Department of Pediatric, The First Affiliated Hospital of He’nan University of Science and Technology, Luoyang 471003, China
| | - Kan Ye
- Department of Child Health, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou 215002, China
| | - Hong Zhu
- Department of Pediatrics, The First People's Hospital of Changzhou, Changzhou 213000, China
| | - Shaoke Chen
- Department of Pediatrics, The Second Affiliated Hospital of Guangxi Medical University, Nanning 530005, China
| | - Xiaobo Chen
- Department of Endocrinology, Children's Hospital, Capital Institute of Pediatrics, Beijing 100020, China
| | - Naijun Wan
- Department of Pediatrics, Jishuitan Hospital, Beijing 100035, China
| | - Zhuangjian Xu
- Department of Pediatrics, Affiliated Hospital of Jiangnan University, Wuxi 214122, China
| | - Qingjin Yin
- Ward 1, Department of Internal Medicine, Chengdu Children's Specialized Hospital, Chengdu 610015, China
| | - Hongxiao Zhang
- Department of Pediatric, Second Hospital of Lanzhou University, Lanzhou 730030, China
| | - Xiaodong Huang
- Department of Endocrinology and Genetics, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - Jianying Yin
- Department of Pediatrics, Hebei General Hospital, Shijiazhuang 050051, China
| | - Huifeng Zhang
- Department of Pediatrics, the Second Hospital of Hebei Medical University, Shijiazhuang 050000, China
| | - Pin Li
- Department of Endocrinology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200333, China
| | - Ping Yin
- School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Junfen Fu
- Department of Endocrinology, National Clinical Research Center for Child Health, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou 310052, China
| | - XiaoPing Luo
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| |
Collapse
|
8
|
Juul A, Backeljauw P, Højby M, Kawai M, Kildemoes RJ, Linglart A, Zuckerman-Levin N, Horikawa R. Somapacitan in children born small for gestational age: a multi-centre, open-label, controlled phase 2 study. Eur J Endocrinol 2023; 188:6979717. [PMID: 36651161 DOI: 10.1093/ejendo/lvac008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 11/15/2022] [Accepted: 11/18/2022] [Indexed: 01/11/2023]
Abstract
OBJECTIVE Investigate efficacy, safety, and tolerability of 3 once-weekly somapacitan doses compared with daily growth hormone (GH) administration in short children born small for gestational age (SGA). DESIGN Randomised, multi-centre, open-label, controlled phase 2 study comprising a 26-week main phase and a 4-year extension (NCT03878446). The study was conducted at 38 sites across 12 countries. 26-week main phase results are presented here.Sixty-two GH treatment-naïve, prepubertal short children born SGA were randomised and exposed; 61 completed the main phase. Three somapacitan doses (0.16 [n = 12], 0.20 [n = 13], 0.24 [n = 12] mg/kg/week) and 2 daily GH doses (0.035 [n = 12], 0.067 [n = 13] mg/kg/day) were administered subcutaneously. RESULTS After 26 weeks of treatment, the estimated mean annualised height velocity (HV) was 8.9, 11.0, and 11.3 cm/year for somapacitan 0.16, 0.20, and 0.24 mg/kg/week, respectively, compared to 10.3 and 11.9 cm/year for daily GH 0.035 and 0.067 mg/kg/day. Changes from baseline in HV standard deviation score (SDS), height SDS, and insulin-like growth factor I (IGF-I) SDS showed similar dose-dependent responses. Exposure-response modelling indicated the greatest efficacy correlated with the highest somapacitan exposure. Similar safety and tolerability were demonstrated for all weekly somapacitan and daily GH doses. CONCLUSIONS Based on the totality of data on improvements in height-based parameters combined with exposure-response analyses, somapacitan 0.24 mg/kg/week appears most efficacious, providing similar efficacy, safety, and tolerability as daily GH 0.067 mg/kg/day in short children born SGA after 26 weeks of treatment.
Collapse
Affiliation(s)
- Anders Juul
- Department of Growth and Reproduction, Copenhagen University Hospital - Rigshospitalet, Copenhagen 2100, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen 2200, Denmark
| | - Philippe Backeljauw
- Division of Endocrinology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH 45229, United States
| | - Michael Højby
- Clinical Drug Development, Novo Nordisk A/S, Søborg 2860, Denmark
| | - Masanobu Kawai
- Department of Gastroenterology, Nutrition and Endocrinology, Research Institute, Osaka Women's and Children's Hospital, Izumi, Osaka 594-1101, Japan
| | | | - Agnès Linglart
- AP-HP, Université Paris Saclay, INSERM, Service d'Endocrinologie et Diabète de l'Enfant, Hôpital Bicêtre Paris Saclay, Le Kremlin-Bicêtre 94270, France
| | - Nehama Zuckerman-Levin
- Institute of Diabetes, Endocrinology and Metabolism, Rambam Health Care Center, Bruce Rappaport Faculty of Medicine, Technion, Haifa 31096, Israel
| | - Reiko Horikawa
- Division of Endocrinology and Metabolism, National Center for Child Health and Development, Tokyo 157-8535, Japan
| |
Collapse
|
9
|
Miller BS, Blair JC, Rasmussen MH, Maniatis A, Kildemoes RJ, Mori J, Polak M, Bang RB, Böttcher V, Stagi S, Horikawa R. Weekly Somapacitan is Effective and Well Tolerated in Children With GH Deficiency: The Randomized Phase 3 REAL4 Trial. J Clin Endocrinol Metab 2022; 107:3378-3388. [PMID: 36062966 PMCID: PMC9693810 DOI: 10.1210/clinem/dgac513] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Indexed: 11/19/2022]
Abstract
CONTEXT Somapacitan, a once-weekly reversible albumin-binding GH derivative, is evaluated in children with GH deficiency (GHD). OBJECTIVE To demonstrate efficacy and safety of somapacitan vs daily GH. METHODS REAL4 is a randomised, multinational, open-labeled, active-controlled parallel group phase 3 trial, comprising a 52-week main trial and 3-year extension (NCT03811535). SETTING Eighty-six sites across 20 countries. PATIENTS 200 treatment-naïve patients were randomized and exposed. INTERVENTIONS Patients were randomized 2:1 to somapacitan (0.16 mg/kg/wk) or daily GH (Norditropin; 0.034 mg/kg/d), administered subcutaneously. MAIN OUTCOME MEASURES The primary endpoint was annualized height velocity (HV; cm/y) at week 52. Additional assessments included HV SD score (SDS), height SDS, bone age, IGF-I SDS, patient-reported outcomes, and safety measures. RESULTS Estimated mean HV at week 52 was 11.2 and 11.7 cm/y for somapacitan and daily GH, respectively. Noninferiority was confirmed. Changes in HV SDS, height SDS, bone age, and IGF-I SDS from baseline to week 52 were similar between treatment groups. At week 52, mean IGF-I SDS values were similar between treatment groups and within normal range (-2 to +2). Safety of somapacitan was consistent with the well-known daily GH profile. Low proportions of injection-site reactions were reported for somapacitan (5.3%) and daily GH (5.9%). Both treatments similarly reduced disease burden from baseline to week 52, whereas a greater treatment burden reduction was observed for somapacitan. CONCLUSIONS Similar efficacy for somapacitan compared to daily GH was demonstrated over 52 weeks of treatment with comparable safety and mean IGF-I SDS levels in treatment-naïve children with GHD.
Collapse
Affiliation(s)
- Bradley S Miller
- Division of Pediatric Endocrinology, University of Minnesota Masonic Children's Hospital, Minneapolis, MN 55454, USA
| | - Joanne C Blair
- Department of Endocrinology, Alder Hey Children's NHS Foundation Trust, Liverpool, L14 5AB, UK
| | - Michael Højby Rasmussen
- Correspondence: Michael Højby Rasmussen, MD, PhD, MSc, Novo Nordisk A/S, 2860 Søborg, Denmark.
| | | | | | - Jun Mori
- Division of Pediatric Endocrinology and Metabolism, Children’s Medical Center, Osaka City General Hospital, Osaka 534-0021, Japan
| | - Michel Polak
- Service d’Endocrinologie, Gynécologie et Diabétologie Pédiatriques, Hôpital Universitaire Necker Enfants Malades Paris, Assistance Publique-Hôpitaux de Paris, Paris 75015, France
| | | | - Volker Böttcher
- Division of Pediatric Endocrinology and Metabolism, MVZ Endokrinologikum Frankfurt am Main, Frankfurt 60596, Germany
| | - Stefano Stagi
- Department of Health Sciences, University of Florence, Anna Meyer Children's University Hospital, Florence 50139, Italy
| | - Reiko Horikawa
- Division of Endocrinology and Metabolism, National Center for Child Health and Development, Tokyo 157-0074, Japan
| |
Collapse
|
10
|
Bidlingmaier M, Valcour A, Schilbach K, Kuehnle T, Diederich S, Rogge T, Cavalier E, Katayev A. Differences in the distribution of insulin-like growth-factor-I (IGF-I) concentrations between European and US populations. J Endocr Soc 2022; 6:bvac081. [PMID: 35673402 PMCID: PMC9165432 DOI: 10.1210/jendso/bvac081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Indexed: 11/19/2022] Open
Abstract
Abstract
Context
Method-specific reference intervals (RIs) determine utility of IGF-I as a biomarker in growth hormone-related diseases. Differences between populations might affect applicability of RIs.
Objective
To compare population-specific RIs derived from IGF-I routine testing in laboratories in the US and Europe using the same assay.
Design and setting
Uncensored routine IGF-I testing results generated over 5 years in four accredited laboratories (US, n=778,173 males/710,752 females; Europe, n=23,220 males/40,183 females).
Main outcome measures
Construction of RIs by indirect statistical methods designed to utilize routine testing data (modified Hoffmann approach). Comparison to published RIs, between the US and Europe, and between regions in the US with lower and higher mean body mass indexes (BMIs).
Results
Lower limits (LLs) of RIs calculated from all routine data sets do not differ from the published LLs. The same is true for Upper limits (ULs) calculated from European routine data. ULs derived from US routine data are significantly higher (children (10–18 years [mean, %]: boys +149.3 ng/mL [+34.6%]; girls +94.9 ng/mL [+19.8%]); adults (19–95 years: males +45 ng/mL [+20.3%]; females +29.7 ng/mL [+13.8%])). Average IGF-I is higher in samples from Colorado (lower mean BMI) compared with Alabama (p <0.0001), although the difference is smaller than between each of them and Europe.
Conclusions
We provide evidence that in large datasets from the same population, direct sampling and the indirect Hoffmann approach provide comparable RIs. While LLs are comparable between Europe and the US, the UL is significantly higher in the US. We suggest use of adapted RIs for the US.
Collapse
Affiliation(s)
- Martin Bidlingmaier
- Endocrine Laboratory, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
| | - Andre Valcour
- Laboratory Corporation of America Holdings, North Carolina, USA
| | - Katharina Schilbach
- Endocrine Laboratory, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
| | - Tim Kuehnle
- Endocrine Laboratory, Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
| | | | | | | | - Alex Katayev
- Laboratory Corporation of America Holdings, North Carolina, USA
| |
Collapse
|
11
|
Helleberg H, Bjelke M, Damholt BB, Pedersen PJ, Rasmussen MH. Absorption, metabolism and excretion of once-weekly somapacitan, a long-acting growth hormone derivative, after single subcutaneous dosing in human subjects. Eur J Pharm Sci 2021; 167:106030. [PMID: 34601071 DOI: 10.1016/j.ejps.2021.106030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 08/31/2021] [Accepted: 09/29/2021] [Indexed: 01/10/2023]
Abstract
Somapacitan is a reversible albumin-binding growth hormone (GH) derivative in clinical development for once-weekly administration in patients with adult GH deficiency (AGHD) and children with GH deficiency (GHD). To date, the use of somapacitan in AGHD or severe AGHD has been approved in the USA and Japan, respectively. This study (ClinicalTrials.gov, NCT02962440) investigated the absorption, metabolism and excretion, as well as the pharmacokinetics (PK), of tritium-labelled somapacitan ([3H]-somapacitan). Seven healthy males received a single subcutaneous dose of 6 mg somapacitan containing [3H]-somapacitan 20 MBq. Blood, serum, plasma, urine, faeces, and expired air were collected for radioactivity assessment. Metabolites were identified and quantified in plasma and urine collected. The PK of plasma components were determined, and the radioactive peaks of the most abundant plasma metabolites and urine metabolites were selected for analysis. Twenty-eight days after dosing, 94.0% of the administered dose was recovered as [3H]-somapacitan-related material, most of which was excreted in urine (80.9%); 12.9% was excreted in faeces, and an insignificant amount (0.2%) was exhaled in expired air. PK properties of [3H]-somapacitan-related material appeared to be consistent across plasma, serum and blood. Three abundant plasma metabolites (P1, M1 and M1B) and two abundant urine metabolites (M4 and M5) were identified. The total exposure of intact somapacitan accounted for 59% of the total exposure of all somapacitan-related material, P1 accounted for 21% and M1 plus M1B accounted for 12%. M4 and M5 were the most abundant urine metabolites and accounted for 37% and 8% of the dosed [3H]-somapacitan radioactivity, respectively. No intact somapacitan was found in excreta. Two subjects had six adverse events (AEs); all were mild in severity and unlikely to be related to trial product. The majority of dosed [3H]-somapacitan (94%) was recovered as excreted metabolites. Urine was the major route for excretion of somapacitan metabolites, followed by faeces, and exhalation in expired air was negligible. The low molecular weights of identified urine metabolites demonstrate that somapacitan was extensively degraded to small residual fragments that were excreted (fully biodegradable). The extensive metabolic degradation and full elimination of metabolites in excreta were the major clearance pathways of somapacitan and the key elements in its biological fate. A single dose of 6 mg somapacitan (containing [3H]-somapacitan) in healthy male subjects was well tolerated with no unexpected safety issues identified.
Collapse
Affiliation(s)
- Hans Helleberg
- Global Discovery and Development Sciences, Novo Nordisk A/S, Måløv, Denmark.
| | - Mads Bjelke
- Global Discovery and Development Sciences, Novo Nordisk A/S, Måløv, Denmark.
| | | | | | - Michael Højby Rasmussen
- Stem Cell Development, Novo Nordisk A/S, Måløv, Denmark; Clinical Drug Development, Novo Nordisk A/S, Søborg, Denmark.
| |
Collapse
|
12
|
Papathanasiou T, Agersø H, Damholt BB, Højby Rasmussen M, Kildemoes RJ. Population Pharmacokinetics and Pharmacodynamics of Once-Daily Growth Hormone Norditropin ® in Children and Adults. Clin Pharmacokinet 2021; 60:1217-1226. [PMID: 33864240 PMCID: PMC8416863 DOI: 10.1007/s40262-021-01011-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2021] [Indexed: 11/24/2022]
Abstract
Background and Objective Once-daily injectable recombinant human growth hormone (GH) formulations (e.g. Norditropin®; Novo Nordisk A/S) are used to treat GH deficiency in children and adults, with much of the therapeutic effect mediated via the insulin-like growth factor-I (IGF-I) response. Despite a long history of use, there are few data on the pharmacokinetics and pharmacodynamics (serum IGF-I response) of this therapy, or of potential differences in the relationship of GH pharmacokinetic/pharmacodynamic (PK/PD) effects between children and adults. This study aimed to characterise the GH pharmacokinetics and IGF-I profile following daily subcutaneous GH in adults and children with GH deficiency. Methods A model was developed based on a population PK/PD modelling meta-analysis of data from three phase I clinical trials (two using Norditropin® as a comparator with somapacitan, and one as a comparator with a pegylated GH product). Sequential model building was performed, first developing a model that could describe GH pharmacokinetics. A PD model of IGF-I data was then developed using PK and PD data, and where all PK parameters were kept fixed to those estimated in the PK model. Results The model developed accurately describes and predicts GH pharmacokinetics and IGF-I response. Body weight was shown to have an important inversely correlated influence on GH exposure (and IGF-I standard deviation score), and this largely explained differences between adults and children. Conclusions The pharmacokinetics/pharmacodynamics developed here can inform expectations about the PD effects of different doses of GH in patients with GH deficiency of different body weights, regardless of their age. Clinical Trial Registration Pooled modelling analysis of data from ClinicalTrials.gov identifiers NCT01973244, NCT00936403 and NCT01706783. Dates of registration NCT01973244: 22 October, 2013; NCT00936403: 9 July, 2009; NCT01706783: 11 October, 2012. Supplementary Information The online version contains supplementary material available at 10.1007/s40262-021-01011-3.
Collapse
Affiliation(s)
- Theodoros Papathanasiou
- Global Development, Novo Nordisk A/S, 2860, Søborg, Denmark.,Department of Pharmacometrics, Novartis, Basel, Switzerland
| | - Henrik Agersø
- Global Development, Novo Nordisk A/S, 2860, Søborg, Denmark
| | - Birgitte Bentz Damholt
- Global Development, Novo Nordisk A/S, 2860, Søborg, Denmark.,Clinical Pharmacology, SNIPR BIOME, Copenhagen, Denmark
| | | | | |
Collapse
|
13
|
Bentz Damholt B, Dombernowsky SL, Dahl Bendtsen M, Bisgaard C, Højby Rasmussen M. Effect of Kidney or Hepatic Impairment on the Pharmacokinetics and Pharmacodynamics of Somapacitan: Two Open-Label, Parallel-Group Trials. Clin Pharmacokinet 2021; 60:1015-1027. [PMID: 33754315 PMCID: PMC8332591 DOI: 10.1007/s40262-021-00990-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/16/2021] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Somapacitan is a long-acting growth hormone (GH) derivative being developed for once-weekly dosing in patients with GH deficiency (GHD). Our objective was to evaluate the impact of kidney or hepatic impairment on somapacitan exposure in adults. METHODS In two open-label, parallel-group, single-center, 6-week trials, eligible subjects (18-75 years of age, body mass index 18.5-34.9 kg/m2, GH-naïve, without GHD) were divided into five kidney (total n = 44) or three hepatic (n = 34) function groups. Subjects with normal kidney/hepatic function were matched to those with kidney/hepatic impairment by age, sex, and body weight. Subjects received three subcutaneous somapacitan administrations (0.08 mg/kg) on days 1, 8, and 15. Blood samples were collected before each dose, at 28 time points throughout 2 weeks after the last dose, and at follow-up (3-4 weeks after the last dose). The primary endpoint was area under the somapacitan serum concentration-time curve up to 1 week after the last dose (AUC0-168 h), while secondary endpoints included AUC0-168 h of insulin-like growth factor (IGF)-I. RESULTS In the kidney impairment trial, somapacitan AUC0-168 h was higher in groups with severe kidney impairment and requiring hemodialysis versus the normal kidney function group (estimated ratio and 90% confidence interval 1.75 [1.00-3.06] and 1.63 [1.01-2.61], respectively). AUC0-168 h of IGF-I was increased in the moderate impairment group (1.35 [1.09-1.66]), severe impairment group (1.40 [1.10-1.78]), and requiring hemodialysis group (1.24 [1.01-1.52]), compared with the normal function group. In the hepatic impairment trial, somapacitan AUC0-168 h was significantly higher in the moderate impairment group compared with the normal hepatic function group (4.69 [2.92-7.52]). IGF-I AUC0-168 h was lower in both hepatic impairment groups (0.85 [0.67-1.08] for the mild impairment group and 0.75 [0.60-0.95] for the moderate impairment group) compared with the normal function group. No new safety or tolerability issues were observed. CONCLUSIONS In summary, somapacitan exposure increased with level of kidney/hepatic impairment. Clinically, this will be taken into account when treating adults with GHD with somapacitan, as doses should be individually titrated. CLINICAL TRIAL REGISTRATION NCT03186495 (kidney impairment trial, registered 12 June 2017); NCT03212131 (hepatic impairment trial, registered 30 June 2017).
Collapse
|
14
|
Juul Kildemoes R, Højby Rasmussen M, Agersø H, Overgaard RV. Optimal Monitoring of Weekly IGF-I Levels During Growth Hormone Therapy With Once-Weekly Somapacitan. J Clin Endocrinol Metab 2021; 106:567-576. [PMID: 33313798 PMCID: PMC7823237 DOI: 10.1210/clinem/dgaa775] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Indexed: 12/23/2022]
Abstract
CONTEXT Somapacitan is a long-acting growth hormone (GH) in development for once-weekly treatment of GH deficiency (GHD). Optimal monitoring of insulin-like growth factor-I (IGF-I) levels must account for weekly IGF-I fluctuations following somapacitan administration. OBJECTIVE To develop and assess the reliability of linear models for predicting mean and peak IGF-I levels from samples taken on different days after dosing. DESIGN A pharmacokinetic/pharmacodynamic model was used to simulate IGF-I data in adults and children following weekly somapacitan treatment of GHD. SETTING AND PATIENTS 39 200 IGF-I profiles were simulated with reference to data from 26 adults and 23 children with GHD. INTERVENTION(S) The simulated dose range was 0.02 to 0.12 mg/kg for adults and 0.02 to 0.16 mg/kg for children. Simulated data with >4 average standard deviation score were excluded. MAIN OUTCOME MEASURE(S) Linear models for predicting mean and peak IGF-I levels based on IGF-I samples from different days after somapacitan dose. RESULTS Robust linear relationships were found between IGF-I sampled on any day after somapacitan dose and the weekly mean (R2 > 0.94) and peak (R2 > 0.84). Prediction uncertainties were generally low when predicting mean from samples taken on any day (residual standard deviation [RSD] ≤ 0.36) and peak from samples taken on day 1 to 4 (RSD ≤ 0.34). IGF-I monitoring on day 4 and day 2 after dose provided the most accurate estimate of IGF-I mean (RSD < 0.2) and peak (RSD < 0.1), respectively. CONCLUSIONS Linear models provided a simple and reliable tool to aid optimal monitoring of IGF-I by predicting mean and peak IGF-I levels based on an IGF-I sample following dosing of somapacitan. A short visual summary of our work is available (1).
Collapse
Affiliation(s)
- Rasmus Juul Kildemoes
- Quantitative Clinical Pharmacology, Novo Nordisk A/S, Søborg, Denmark
- Correspondence and Reprint Requests: Rasmus Juul Kildemoes, PhD, Novo Nordisk A/S, Vandtårnsvej 108, 2860 Søborg, Denmark. E-mail:
| | | | - Henrik Agersø
- Global Development, Novo Nordisk A/S, Bagsværd, Denmark
| | | |
Collapse
|
15
|
Yuen KCJ, Miller BS, Boguszewski CL, Hoffman AR. Usefulness and Potential Pitfalls of Long-Acting Growth Hormone Analogs. Front Endocrinol (Lausanne) 2021; 12:637209. [PMID: 33716988 PMCID: PMC7943875 DOI: 10.3389/fendo.2021.637209] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/11/2021] [Indexed: 11/18/2022] Open
Abstract
Daily recombinant human GH (rhGH) is currently approved for use in children and adults with GH deficiency (GHD) in many countries with relatively few side-effects. Nevertheless, daily injections can be painful and distressing for some patients, often resulting in non-adherence and reduction of treatment outcomes. This has prompted the development of numerous long-acting GH (LAGH) analogs that allow for decreased injection frequency, ranging from weekly, bi-weekly to monthly. These LAGH analogs are attractive as they may theoretically offer increased patient acceptance, tolerability, and therapeutic flexibility. Conversely, there may also be pitfalls to these LAGH analogs, including an unphysiological GH profile and differing molecular structures that pose potential clinical issues in terms of dose initiation, therapeutic monitoring, incidence and duration of side-effects, and long-term safety. Furthermore, fluctuations of peak and trough serum GH and IGF-I levels and variations in therapeutic efficacy may depend on the technology used to prolong GH action. Previous studies of some LAGH analogs have demonstrated non-inferiority compared to daily rhGH in terms of increased growth velocity and improved body composition in children and adults with GHD, respectively, with no significant unanticipated adverse events. Currently, two LAGH analogs are marketed in Asia, one recently approved in the United States, another previously approved but not marketed in Europe, and several others proceeding through various stages of clinical development. Nevertheless, several practical questions still remain, including possible differences in dose initiation between naïve and switch-over patients, methodology of dose adjustment/s, timing of measuring serum IGF-I levels, safety, durability of efficacy and cost-effectiveness. Long-term surveillance of safety and efficacy of LAGH analogs are needed to answer these important questions.
Collapse
Affiliation(s)
- Kevin C. J. Yuen
- Barrow Pituitary Center, Barrow Neurological Institute, Departments of Neuroendocrinology and Neurosurgery, University of Arizona College of Medicine and Creighton School of Medicine, Phoenix, AZ, United States
- *Correspondence: Kevin C. J. Yuen,
| | - Bradley S. Miller
- Division of Pediatric Endocrinology, Department of Pediatrics, University of Minnesota, Minneapolis, MN, United States
| | - Cesar L. Boguszewski
- SEMPR, Serviço de Endocrinologia e Metabologia, Departamento de Clínica Médica, Hospital de Clínicas da Universidade Federal do Paraná, Curitiba, Brazil
| | - Andrew R. Hoffman
- Department of Medicine, VA Palo Alto Health Care System and Stanford University School of Medicine, Palo Alto, CA, United States
| |
Collapse
|
16
|
Otsuka F, Takahashi Y, Tahara S, Ogawa Y, Højby Rasmussen M, Takano K. Similar safety and efficacy in previously treated adults with growth hormone deficiency randomized to once-weekly somapacitan or daily growth hormone. Clin Endocrinol (Oxf) 2020; 93:620-628. [PMID: 32603494 PMCID: PMC7689735 DOI: 10.1111/cen.14273] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/22/2020] [Accepted: 06/24/2020] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Somapacitan is a long-acting, reversible albumin-binding growth hormone (GH) derivative in development. This study aimed to evaluate the safety and efficacy of once-weekly somapacitan versus daily GH over 52 weeks in Japanese patients with adult growth hormone deficiency (AGHD). DESIGN Phase 3, multicentre, randomized, parallel-group, open-label, active-controlled trial (NCT03075644). PATIENTS Previously GH-treated Japanese patients with AGHD were randomized 3:1 to somapacitan (n = 46) or daily GH (n = 16) for 20 weeks' dose titration and 32 weeks' fixed-dose treatment. MEASUREMENTS Primary endpoint was the incidence of adverse events (AEs). Secondary endpoints included change from baseline to week 52 in visceral, subcutaneous and total adipose tissue (VAT, SAT and TAT). RESULTS Mean (SD) prescribed doses after titration were 1.780 (1.058) mg/week for somapacitan and 0.197 (0.083) mg/day for daily GH. Rate of AEs per 100 patient-years was similar between arms (somapacitan, 312.7; daily GH, 309.8). Four AEs in the somapacitan arm were serious; none were considered treatment-related. Mean insulin-like growth factor-I standard deviation score (IGF-I SDS) was maintained from baseline in both arms. No significant differences were observed between arms for change from baseline to week 52 in VAT, SAT or TAT (estimated difference, somapacitan - daily GH [95% CI]: -1.74 [-18.13; 14.66], -11.53 [-35.54; 12.48] and - 12.85 [-47.31; 21.62] cm2 , respectively). CONCLUSIONS Treatment in both groups was well tolerated, with no unexpected safety findings. Impact on adipose tissue was similar to somapacitan and daily GH in patients with AGHD. A short visual summary of our work is available at https://bit.ly/3946YNF.
Collapse
Affiliation(s)
- Fumio Otsuka
- Department of General MedicineOkayama University Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOkayamaJapan
| | - Yutaka Takahashi
- Division of Diabetes and EndocrinologyDepartment of Internal MedicineKobe University Graduate School of MedicineKobeJapan
| | | | | | | | - Koji Takano
- Department of Endocrinology, Diabetes and MetabolismKitasato UniversitySagamiharaJapan
| |
Collapse
|
17
|
Sävendahl L, Battelino T, Brod M, Højby Rasmussen M, Horikawa R, Juul RV, Saenger P. Once-Weekly Somapacitan vs Daily GH in Children With GH Deficiency: Results From a Randomized Phase 2 Trial. J Clin Endocrinol Metab 2020; 105:5699635. [PMID: 31917835 PMCID: PMC7069655 DOI: 10.1210/clinem/dgz310] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 01/07/2020] [Indexed: 01/31/2023]
Abstract
CONTEXT Daily growth hormone (GH) injections can be burdensome for patients and carers. Somapacitan is a long-acting, reversible albumin-binding GH derivative in development for once-weekly administration in patients with growth hormone deficiency (GHD). OBJECTIVE The objective of this study is to evaluate the efficacy, safety, and tolerability of once-weekly somapacitan vs once-daily GH. DESIGN REAL 3 is a multicenter, randomized, controlled, double-blind (somapacitan doses), phase 2 study with a 26-week main and 26-week extension phase (NCT02616562). SETTING This study took place at 29 sites in 11 countries. PATIENTS Fifty-nine GH treatment-naive prepubertal children with GHD were randomly assigned; 58 completed the trial. INTERVENTIONS Interventions comprised 3 somapacitan doses (0.04 [n = 16], 0.08 [n = 15], or 0.16 mg/kg/wk [n = 14]) and daily GH (0.034 mg/kg/d [n = 14]), administered subcutaneously. MAIN OUTCOME MEASURES The primary end point was height velocity (HV) at week 26. Secondary efficacy end points included HV SD score (SDS) and insulin-like growth factor-I (IGF-I) SDS. RESULTS At week 26, mean (SD) annualized HV for the somapacitan groups was 8.0 (2.0), 10.9 (1.9), and 12.9 (3.5) cm/year, respectively, vs 11.4 (3.3) cm/year for daily GH; estimated treatment difference (somapacitan 0.16 mg/kg/week-daily GH): 1.7 [95% CI -0.2 to 3.6] cm/year. HV was sustained at week 52, and significantly greater with somapacitan 0.16 mg/kg/week vs daily GH. Mean (SD) change from baseline in HV SDS at week 52 was 4.72 (2.79), 6.14 (3.36), and 8.60 (3.15) for the somapacitan groups, respectively, vs 7.41 (4.08) for daily GH. Model-derived mean (SD) IGF-I SDS for the somapacitan groups was -1.62 (0.86), -1.09 (0.78), and 0.31 (1.06), respectively, vs -0.40 (1.50) observed for daily GH. Safety and tolerability were consistent with the profile of daily GH. CONCLUSIONS In children with GHD, once-weekly somapacitan 0.16 mg/kg/week provided the closest efficacy match with similar safety and tolerability to daily GH after 26 and 52 weeks of treatment. A short visual summary of our work is available (1).
Collapse
Affiliation(s)
- Lars Sävendahl
- Department of Women’s and Children’s Health, Karolinska Institute and Pediatric Endocrinology Unit, Karolinska University Hospital, Stockholm, Sweden
- Correspondence: Lars Sävendahl, MD, PhD, Karolinska Institute and Pediatric Endocrinology Unit, Karolinska University Hospital, Akademiska stråket 1, Stockholm 171 64, Sweden. E-mail:
| | - Tadej Battelino
- UMC–University Children’s Hospital, and Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Meryl Brod
- The Brod Group, Mill Valley, California, US
| | | | - Reiko Horikawa
- National Center for Child Health and Development, Tokyo, Japan
| | | | | | | |
Collapse
|
18
|
Johannsson G, Gordon MB, Højby Rasmussen M, Håkonsson IH, Karges W, Sværke C, Tahara S, Takano K, Biller BMK. Once-weekly Somapacitan is Effective and Well Tolerated in Adults with GH Deficiency: A Randomized Phase 3 Trial. J Clin Endocrinol Metab 2020; 105:5727871. [PMID: 32022863 PMCID: PMC7076631 DOI: 10.1210/clinem/dgaa049] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 02/04/2020] [Indexed: 01/09/2023]
Abstract
CONTEXT Growth hormone (GH) replacement requires daily GH injections, which is burdensome for some adult patients with GH deficiency (AGHD). OBJECTIVE To demonstrate efficacy and safety of somapacitan, a once-weekly reversible albumin-binding GH derivative, versus placebo in AGHD. DESIGN Randomized, parallel-group, placebo-controlled (double-blind) and active-controlled (open-label) phase 3 trial, REAL 1 (NCT02229851). SETTING Clinics in 17 countries. PATIENTS Treatment-naïve patients with AGHD (n = 301 main study period, 272 extension period); 257 patients completed the trial. INTERVENTIONS Patients were randomized 2:2:1 to once-weekly somapacitan, daily GH, or once-weekly placebo for 34 weeks (main period). During the 52-week extension period, patients continued treatment with somapacitan or daily GH. MAIN OUTCOME MEASURES Body composition measured using dual-energy x-ray absorptiometry (DXA). The primary endpoint was change in truncal fat percentage to week 34. Insulin-like growth factor 1 (IGF-I) standard deviation score (SDS) values were used to dose titrate. RESULTS At 34 weeks, somapacitan significantly reduced truncal fat percentage (estimated difference: -1.53% [-2.68; -0.38]; P = 0.0090), demonstrating superiority compared with placebo, and it improved other body composition parameters (including visceral fat and lean body mass) and IGF-I SDS. At 86 weeks, improvements were maintained with both somapacitan and daily GH. Somapacitan was well tolerated, with similar adverse events (including injection-site reactions) compared with daily GH. CONCLUSIONS In AGHD patients, somapacitan administered once weekly demonstrated superiority over placebo, and the overall treatment effects and safety of somapacitan were in accordance with known effects and safety of GH replacement for up to 86 weeks of treatment. Somapacitan may provide an effective alternative to daily GH in AGHD. A short visual summary of our work is available (1).
Collapse
Affiliation(s)
| | | | - Michael Højby Rasmussen
- Novo Nordisk A/S, Søborg, Denmark
- Correspondence and Reprint Requests: Michael Højby Rasmussen, MD, PhD, MSc, Novo Nordisk A/S, Vandtårnsvej 110–112, DK 2860 Søborg, Denmark. E-mail:
| | | | - Wolfram Karges
- Division of Endocrinology and Diabetes, RWTH Aachen University, Aachen, Germany
| | | | | | - Koji Takano
- Department of Endocrinology, Diabetes and Metabolism, Kitasato University, Tokyo, Japan
| | | |
Collapse
|
19
|
Juul RV, Rasmussen MH, Agersø H, Overgaard RV. Pharmacokinetics and Pharmacodynamics of Once-Weekly Somapacitan in Children and Adults: Supporting Dosing Rationales with a Model-Based Analysis of Three Phase I Trials. Clin Pharmacokinet 2020; 58:63-75. [PMID: 29671202 PMCID: PMC6325982 DOI: 10.1007/s40262-018-0662-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Background Somapacitan, a long-acting growth hormone (GH) derivative, has been well-tolerated in children with GH deficiency (GHD) and adults (healthy and adult GHD), in phase I, single- and multiple-dose trials, respectively, and has pharmacokinetic and pharmacodynamic properties supporting a once-weekly dosing regimen. Objective In the absence of a multiple-dose phase I trial in children with GHD, the aim was to develop a pharmacokinetic/pharmacodynamic model to predict somapacitan exposure and insulin-like growth factor-I (IGF-I) response after once-weekly multiple doses in both children and adults with GHD. Methods Pharmacokinetic/pharmacodynamic models were developed from pharmacokinetic and IGF-I profiles in three phase I trials of somapacitan (doses: healthy adults, 0.01–0.32 mg/kg; adult with GHD, 0.02−0.12 mg/kg; children with GHD, 0.02–0.16 mg/kg) using non-linear mixed-effects modeling. Pharmacokinetics were described using a non-linear one-compartment model with dual first- and zero-order absorption through a transit compartment, with saturable elimination. IGF-I profiles were described using an indirect response pharmacokinetic/pharmacodynamic model, with sigmoidal-effect relationship. Results The non-linear pharmacokinetic and IGF-I data were well-described in order to confidently predict pharmacokinetic/pharmacodynamic profiles after multiple doses in adults and children with GHD. Body weight was found to be a significant covariate, predictive of the differences observed in the pharmacokinetics and pharmacodynamics between children and adults. Weekly dosing of somapacitan provided elevated IGF-I levels throughout the week, despite little or no accumulation of somapacitan, in both adults and children with GHD. Conclusion This analysis of somapacitan pharmacokinetic/pharmacodynamic data supports once-weekly dosing in adults and children with GHD. Trial Registration ClinicalTrials.gov identifier numbers NCT01514500, NCT01706783, NCT01973244. Electronic supplementary material The online version of this article (10.1007/s40262-018-0662-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
| | | | - Henrik Agersø
- Global Development, Novo Nordisk A/S, Bagsvaerd, Denmark
| | | |
Collapse
|
20
|
Lal RA, Hoffman AR. Perspectives on long-acting growth hormone therapy in children and adults. ARCHIVES OF ENDOCRINOLOGY AND METABOLISM 2019; 63:601-607. [PMID: 31939485 PMCID: PMC7237337 DOI: 10.20945/2359-3997000000190] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 09/23/2019] [Indexed: 01/20/2023]
Abstract
Growth hormone therapy with daily injections of recombinant human growth hormone has been available since 1985, and is shown to be safe and effective treatment for short stature in children and for adult growth hormone deficiency. In an effort to produce a product that would improve patient adherence, there has been a strong effort from industry to create a long acting form of growth hormone to ease the burden of use. Technologies used to increase half-life include depot formulations, PEGylated formulations, pro-drug formulations, non-covalent albumin binding growth hormone and growth hormone fusion proteins. At present, two long acting formulations are on the market in China and South Korea, and several more promising agents are under clinical investigation at various stages of development throughout the world. Arch Endocrinol Metab. 2019;63(6):601-7.
Collapse
Affiliation(s)
- Rayhan A Lal
- Division of Endocrinology, Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA
- Division of Endocrinology, Department of Medicine, Stanford University School of Medicine, Stanford, California, USA
| | - Andrew R Hoffman
- Division of Endocrinology, Department of Medicine, Stanford University School of Medicine, Stanford, California, USA
- Medical Service, Department of Veterans Affairs, VA Palo Alto Health Care System, Palo Alto, California, USA
| |
Collapse
|
21
|
Lal RA, Hoffman AR. Long-Acting Growth Hormone Preparations in the Treatment of Children. PEDIATRIC ENDOCRINOLOGY REVIEWS : PER 2019; 16:162-167. [PMID: 30378794 DOI: 10.17458/per.vol16.2018.lh.longactingghpreparation] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Human growth hormone (hGH), which had been in use since 1958, was supplanted by recombinant human growth hormone (rhGH) in 1985 for those with growth hormone deficiency (GHD). Adherence to daily subcutaneous growth hormone is challenging for patients. Thus, several companies have pursued the creation of long acting rhGH. These agents can be divided broadly into depot formulations, PEGylated formulations, pro-drug formulations, non-covalent albumin binding GH and GH fusion proteins. Nutropin Depot is the only long acting rhGH ever approved by the U.S. Food and Drug Administration, and it was removed from the market in 2004. Of the approximately seventeen candidate drugs, only a handful remain under active clinical investigation or are commercially available.
Collapse
Affiliation(s)
- Rayhan A Lal
- Division of Endocrinology, Department of Pediatrics, Stanford University School of Medicine, Stanford, California, USA, Division of Endocrinology, Department of Medicine, Stanford University School of Medicine, Stanford, California, USA, E-mail:
| | - Andrew R Hoffman
- Division of Endocrinology, Department of Medicine, Stanford University School of Medicine, Stanford, California, USA 3Medical Service, VA Palo Alto Health Care System, Palo Alto, California, USA
| |
Collapse
|
22
|
Ku CR, Brue T, Schilbach K, Ignatenko S, Magony S, Chung YS, Kim BJ, Hur KY, Kang HC, Kim JH, Kim MS, Kowalska A, Bolanowski M, Ruchala M, Damjanovic S, Payer J, Choi YJ, Heo SJ, Kim TK, Heo M, Lee J, Lee EJ. Long-acting FC-fusion rhGH (GX-H9) shows potential for up to twice-monthly administration in GH-deficient adults. Eur J Endocrinol 2018; 179:169-179. [PMID: 29973375 DOI: 10.1530/eje-18-0185] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 07/03/2018] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Hybrid Fc-fused rhGH (GX-H9) is a long-acting recombinant human growth hormone (GH) under clinical development for both adults and children with GH deficiency (GHD). We compared the safety, pharmacokinetics and pharmacodynamics of weekly and every other week (EOW) dosages of GX-H9 with those of daily GH administration in adult GHD (AGHD) patients. DESIGN This was a randomized, open-label, active-controlled and dose-escalation study conducted in 16 endocrinology centers in Europe and Korea. METHODS Forty-five AGHD patients with or without prior GH treatment were enrolled. Patients with prior GH treatments were required to have received the last GH administration at least 1 month prior to randomization. Subjects were sequentially assigned to treatment groups. Fifteen subjects were enrolled to each treatment group and randomly assigned to receive either GX-H9 or Genotropin (4:1 ratio). GX-H9 dosage regimens for Groups 1, 2 and 3 were 0.1 mg/kg weekly, 0.3 mg/kg EOW and 0.2 mg/kg EOW, respectively. All Genotropin-assigned subjects received 6 µg/kg Genotropin, regardless of treatment group. Main outcome analyses included measurements of serum insulin-like growth factor 1 (IGF-I), safety, pharmacokinetics, pharmacodynamics and immunogenicity. RESULTS Mean GX-H9 peak and total exposure increased with an increase in dose after a single-dose administration. The mean IGF-I response was sustained above baseline over the intended dose interval of 168 h for the weekly and 336 h for the EOW GX-H9 groups. Safety profiles and immunogenicity were not different across the treatment groups and with Genotropin. CONCLUSIONS GX-H9 has the potential for up to twice-monthly administration.
Collapse
Affiliation(s)
- Cheol Ryong Ku
- Endocrinology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Thierry Brue
- Aix-Marseille Université, INSERM U1251, Marseille Medical Genetics, and AP-HM, Hôpital Conception, Marseille, France
| | - Katharina Schilbach
- Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
| | | | - Sandor Magony
- First Department of Medicine, University of Szeged, Szeged, Hungary
| | - Yoon-Sok Chung
- Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Byung-Joon Kim
- Gachon University Gil Medical Center, Incheon, Republic of Korea
| | - Kyu Yeon Hur
- Samsung Medical Center, Seoul, Republic of Korea
| | - Ho-Cheol Kang
- Chonnam National University Hwasun Hospital, Hwasun-gun, Republic of Korea
| | - Jung Hee Kim
- Seoul National University Hospital, Seoul, Republic of Korea
| | | | - Aldona Kowalska
- Endocrinology Clinic Holycross Cancer Centre, Swietokrzyskie, Poland
| | - Marek Bolanowski
- Department of Endocrinology, Diabetes and Isotope Therapy, Wroclaw Medical University, Wroclaw, Poland
| | - Marek Ruchala
- Poznan University of Medical Sciences Chair and Department of Endocrinology, Metabolism and Internal Medicine, Poznań, Poland
| | | | - Juraj Payer
- 5th Department of Internal Medicine, Comenius University Faculty of Medicine, University Hospital, Bratislava, Slovakia
| | | | | | | | - MinKyu Heo
- Genexine Inc., Seongnam, Republic of Korea
| | - Joan Lee
- Genexine Inc., Seongnam, Republic of Korea
| | - Eun Jig Lee
- Endocrinology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| |
Collapse
|
23
|
Johannsson G, Feldt-Rasmussen U, Håkonsson IH, Biering H, Rodien P, Tahara S, Toogood A, Rasmussen MH. Safety and convenience of once-weekly somapacitan in adult GH deficiency: a 26-week randomized, controlled trial. Eur J Endocrinol 2018; 178:491-499. [PMID: 29500310 PMCID: PMC5920019 DOI: 10.1530/eje-17-1073] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 03/02/2018] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Somapacitan is a reversible albumin-binding growth hormone (GH) derivative, developed for once-weekly administration. This study aimed to evaluate the safety of once-weekly somapacitan vs once-daily Norditropin®. Local tolerability and treatment satisfaction were also assessed. DESIGN 26-week randomized, controlled phase 3 safety and tolerability trial in six countries (Nbib2382939). METHODS Male or female patients aged 18-79 years with adult GH deficiency (AGHD), treated with once-daily GH for ≥6 months, were randomized to once-weekly somapacitan (n = 61) or once-daily Norditropin (n = 31) administered subcutaneously by pen. Both treatments were dose titrated for 8 weeks to achieve insulin-like growth factor I (IGF-I) standard deviation score (SDS) levels within the normal range, and then administered at a fixed dose. Outcome measures were adverse events (AEs), including injection site reactions; occurrence of anti-somapacitan/anti-GH antibodies and change in treatment satisfaction, assessed using the Treatment Satisfaction Questionnaire for Medication-9 (TSQM-9). RESULTS Mean IGF-I SDS remained between 0 and 2 SDS throughout the trial in both groups. AEs were mostly mild or moderate and transient in nature. The most common AEs were nasopharyngitis, headache and fatigue in both groups. More than 1500 somapacitan injections were administered and no clinically significant injection site reactions were reported. No anti-somapacitan or anti-GH antibodies were detected. The TSQM-9 score for convenience increased significantly more with somapacitan vs Norditropin (P = 0.0171). CONCLUSIONS In this 26-week trial in patients with AGHD, somapacitan was well tolerated and no safety issues were identified. Once-weekly somapacitan was reported to be more convenient than once-daily Norditropin.
Collapse
Affiliation(s)
| | | | | | | | - Patrice Rodien
- Reference Centre for Rare Diseases of Thyroid and Hormone ReceptorsMember of EndoERN Network, CHU Angers Centre Hospitalier Universitaire, Angers, France
| | | | | | - Michael Højby Rasmussen
- Global DevelopmentNovo Nordisk A/S, Søborg, Denmark
- Correspondence should be addressed to M H Rasmussen;
| | | |
Collapse
|
24
|
Battelino T, Rasmussen MH, De Schepper J, Zuckerman-Levin N, Gucev Z, Sävendahl L. Somapacitan, a once-weekly reversible albumin-binding GH derivative, in children with GH deficiency: A randomized dose-escalation trial. Clin Endocrinol (Oxf) 2017; 87:350-358. [PMID: 28656605 DOI: 10.1111/cen.13409] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 06/14/2017] [Accepted: 06/23/2017] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate the safety, local tolerability, pharmacodynamics and pharmacokinetics of escalating single doses of once-weekly somapacitan, a reversible, albumin-binding GH derivative, vs once-daily GH in children with GH deficiency (GHD). DESIGN Phase 1, randomized, open-label, active-controlled, dose-escalation trial (NCT01973244). PATIENTS Thirty-two prepubertal GH-treated children with GHD were sequentially randomized 3:1 within each of four cohorts to a single dose of somapacitan (0.02, 0.04, 0.08 and 0.16 mg/kg; n=6 each), or once-daily Norditropin® SimpleXx® (0.03 mg/kg; n=2 each) for 7 days. MEASUREMENTS Pharmacokinetic and pharmacodynamic profiles were assessed. RESULTS Adverse events were all mild, and there were no apparent treatment-dependent patterns in type or frequency. Four mild transient injection site reactions were reported in three of 24 children treated with somapacitan. No antisomapacitan/anti-human growth hormone (hGH) antibodies were detected. Mean serum concentrations of somapacitan increased in a dose-dependent but nonlinear manner: maximum concentration ranged from 21.8 ng/mL (0.02 mg/kg dose) to 458.4 ng/mL (0.16 mg/kg dose). IGF-I and IGFBP-3, and change from baseline in IGF-I standard deviation score (SDS) and IGFBP-3 SDS, increased dose dependently; greatest changes in SDS values were seen for 0.16 mg/kg. IGF-I SDS values were between -2 and +2 SDS, except for peak IGF-I SDS with 0.08 mg/kg somapacitan. Postdosing, IGF-I SDS remained above baseline levels for at least 1 week. CONCLUSIONS Single doses of once-weekly somapacitan (0.02-0.16 mg/kg) were well tolerated in children with GHD, with IGF-I profiles supporting a once-weekly treatment profile. No clinically significant safety/tolerability signals or immunogenicity concerns were identified.
Collapse
Affiliation(s)
- Tadej Battelino
- Faculty of Medicine, UMC-University Children's Hospital, University of Ljubljana, Ljubljana, Slovenia
| | | | - Jean De Schepper
- Division of Paediatric Endocrinology, UZ Brussel, Brussels, Belgium
| | - Nehama Zuckerman-Levin
- Pediatric and Obesity Clinic, Rambam Medical Center and Bruce Rappaport Faculty of Medicine, Haifa, Israel
| | - Zoran Gucev
- University Children's Hospital, Skopje, Macedonia
| | - Lars Sävendahl
- Department of Women's and Children's Health, Karolinska Institutet, Pediatric Endocrinology Unit, Karolinska University Hospital, Stockholm, Sweden
| |
Collapse
|
25
|
Thygesen P, Andersen HS, Behrens C, Fels JJ, Nørskov-Lauritsen L, Rischel C, Johansen NL. Nonclinical pharmacokinetic and pharmacodynamic characterisation of somapacitan: A reversible non-covalent albumin-binding growth hormone. Growth Horm IGF Res 2017; 35:8-16. [PMID: 28595133 DOI: 10.1016/j.ghir.2017.05.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 05/23/2017] [Accepted: 05/23/2017] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Somapacitan is an albumin-binding growth hormone derivative intended for once weekly administration, currently in clinical development for treatment of adult as well as juvenile GH deficiency. Nonclinical in vivo pharmacological characterisation of somapacitan was performed to support the clinical trials. Here we present the pharmacokinetic and pharmacodynamic effects of somapacitan in rats, minipigs, and cynomolgus monkeys. METHODS Pharmacokinetic studies investigating exposure, absorption, clearance, and bioavailability after single intravenous (i.v.) and subcutaneous (s.c.) administration were performed in all species. A dose-response study with five dose levels and a multiple dose pharmacodynamic study with four once weekly doses was performed in hypophysectomised rats to evaluate the effect of somapacitan on growth and IGF-I production. RESULTS Pharmacokinetic profiles indicated first order absorption from the subcutaneous tissue after s.c. injections for somapacitan in all three species. Apparent terminal half-lives were 5-6h in rats, 10-12h in minipigs, and 17-20h in monkeys. Somapacitan induced a dose-dependent growth in hypophysectomised rats (p<0.001) and an increase in plasma IGF-I levels in rats (p<0.01), minipigs (p<0.01), and cynomolgus monkeys (p<0.05) after single dose administration. Multiple once weekly dosing of somapacitan in hypophysectomised rats induced a step-wise increase in body weight with an initial linear phase the first 3-4days in each dosing interval (p<0.001). CONCLUSION The nonclinical pharmacokinetic and pharmacodynamic studies of somapacitan showed similar pharmacokinetic properties, with no absorption-limited elimination, increased clearance and increased and sustained levels of IGF-I in plasma for up to 10days after a single dose administration in all three species. Somapacitan induced a dose-dependent increase in body weight and IGF-I levels in hypophysectomised rats. Multiple dosing of somapacitan in hypophysectomised rats suggested a linear growth for the first 3-4days in each weekly dosing interval, whereas daily hGH dosing showed linear growth for approximately two weeks before reaching a plateau level.
Collapse
Affiliation(s)
- Peter Thygesen
- Novo Nordisk A/S, Haemophilia Pharmacology, DK-2760, Maaloev, Denmark.
| | | | - Carsten Behrens
- Novo Nordisk A/S, Protein & Peptide Chemistry, DK-2760, Maaloev, Denmark
| | | | | | - Christian Rischel
- Novo Nordisk A/S, Large Protein Biophysics & Formulation, DK-2760, Maaloev, Denmark
| | | |
Collapse
|