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Khan AA, Guyatt G, Ali DS, Bilezikian JP, Collins MT, Dandurand K, Mannstadt M, Murphy D, M'Hiri I, Rubin MR, Sanders R, Shrayyef M, Siggelkow H, Tabacco G, Tay YKD, Van Uum S, Vokes T, Winer KK, Yao L, Rejnmark L. Management of Hypoparathyroidism. J Bone Miner Res 2022; 37:2663-2677. [PMID: 36161671 DOI: 10.1002/jbmr.4716] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 09/19/2022] [Accepted: 09/22/2022] [Indexed: 12/24/2022]
Abstract
Hypoparathyroidism (HypoPT) is a rare disorder characterized by hypocalcemia in the presence of a low or inappropriately normal parathyroid hormone level. HypoPT is most commonly seen after neck surgery, which accounts for approximately 75% of cases, whereas approximately 25% have HypoPT due to nonsurgical causes. In both groups of patients, conventional therapy includes calcium and active vitamin D analogue therapy aiming to maintain serum calcium concentration in the low normal or just below the normal reference range and normalize serum phosphorus, magnesium concentrations, and urine calcium levels. The limitations of conventional therapy include wide fluctuations in serum calcium, high pill burden, poor quality of life, and renal complications. Parathyroid hormone (PTH) replacement therapy may improve the biochemical profile in those in whom conventional therapy proves unsatisfactory. Based on a systematic review and meta-analysis of the literature, the panel made a graded recommendation suggesting conventional therapy as first line therapy rather than administration of PTH (weak recommendation, low quality evidence). When conventional therapy is deemed unsatisfactory, the panel considers use of PTH. Because pregnancy and lactation are associated with changes in calcium homeostasis, close monitoring is required during these periods with appropriate adjustment of calcium and active vitamin D analogue therapy to ensure that serum calcium remains in the mid to low normal reference range in order to avoid maternal and fetal complications. Emerging therapies include molecules with prolonged PTH action as well as different mechanisms of action that may significantly enhance drug efficacy and safety. © 2022 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Aliya A Khan
- Division of Endocrinology and Metabolism, McMaster University, Hamilton, Canada
| | - Gordon Guyatt
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Canada
| | - Dalal S Ali
- Division of Endocrinology and Metabolism, McMaster University, Hamilton, Canada
| | - John P Bilezikian
- Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Michael T Collins
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - Karel Dandurand
- Division of Endocrinology and Metabolism, McMaster University, Hamilton, Canada
| | - Michael Mannstadt
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | | | - Iman M'Hiri
- Bone Research and Education Centre, Oakville, Canada
| | - Mishaela R Rubin
- Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | | | | | - Heide Siggelkow
- Clinic of Gastroenterology, Gastrointestinal Oncology and Endocrinology, University Medical Center Goettingen, Goettingen, Germany.,MVZ Endokrinologikum Goettingen, Goettingen, Germany
| | - Gaia Tabacco
- Unit of Metabolic Bone and Thyroid Diseases, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy.,Unit of Endocrinology and Diabetes, Campus Bio-Medico University of Rome, Rome, Italy
| | - Yu-Kwang Donovan Tay
- Department of Medicine, Sengkang General Hospital, Singhealth and Duke-NUS Medical School, Singapore, Singapore
| | - Stan Van Uum
- Department of Medicine, Western University, London, Canada
| | - Tamara Vokes
- Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Karen K Winer
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | - Liang Yao
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Canada
| | - Lars Rejnmark
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
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Yao L, Hui X, Li M, Li J, Ahmed MM, Lin C, Kandi M, Sreekanta A, Makhdami N, Tamilselvan D, Ali DS, Dandurand K, Yang K, Bilezikian JP, Brandi ML, Clarke BL, Mannstadt M, Rejnmark L, Khan AA, Guyatt G. Complications, Symptoms, Presurgical Predictors in Patients With Chronic Hypoparathyroidism: A Systematic Review. J Bone Miner Res 2022; 37:2642-2653. [PMID: 36375810 DOI: 10.1002/jbmr.4673] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 07/22/2022] [Accepted: 08/08/2022] [Indexed: 11/10/2022]
Abstract
The complications and symptoms of hypoparathyroidism remain incompletely defined. Measuring serum parathyroid hormone (PTH) and calcium levels early after total thyroidectomy may predict the development of chronic hypoparathyroidism. The study aimed (i) to identify symptoms and complications associated with chronic hypoparathyroidism and determine the prevalence of those symptoms and complications (Part I), and (ii) to examine the utility of early postoperative measurements of PTH and calcium in predicting chronic hypoparathyroidism (Part II). We searched Medline, Medline In-Process, EMBASE, and Cochrane CENTRAL to identify complications and symptoms associated with chronic hypoparathyroidism. We used two predefined criteria (at least three studies reported the complication and symptom and had statistically significantly greater pooled relative estimates). To estimate prevalence, we used the median and interquartile range (IQR) of the studies reporting complications and symptoms. For testing the predictive values of early postoperative measurements of PTH and calcium, we used a bivariate model to perform diagnostic test meta-analysis. In Part I, the 93 eligible studies enrolled a total of 18,973 patients and reported on 170 complications and symptoms. We identified nine most common complications or symptoms probably associated with chronic hypoparathyroidism. The complications or symptoms and the prevalence are as follows: nephrocalcinosis/nephrolithiasis (median prevalence among all studies 15%), renal insufficiency (12%), cataract (17%), seizures (11%), arrhythmia (7%), ischemic heart disease (7%), depression (9%), infection (11%), and all-cause mortality (6%). In Part II, 18 studies with 4325 patients proved eligible. For PTH measurement, regarding the posttest probability, PTH values above 10 pg/mL 12-24 hours postsurgery virtually exclude chronic hypoparathyroidism irrespective of pretest probability (100%). When PTH values are below 10 pg/mL, posttest probabilities range from 3% to 64%. Nine complications and symptoms are probably associated with chronic hypoparathyroidism. A PTH value above a threshold of 10 pg/mL 12-24 hours after total thyroidectomy is a strong predictor that the patients will not develop chronic hypoparathyroidism. Patients with PTH values below the threshold need careful monitoring as some will develop chronic hypoparathyroidism. © 2022 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Liang Yao
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Xu Hui
- Evidence-Based Social Sciences Research Center/Health Technology Assessment Center, School of Public Health, Lanzhou University, Lanzhou, China
| | - Meixuan Li
- Evidence-Based Medicine Center, School of Basic Medical Sciences, Lanzhou University, Lanzhou, China
| | - Jing Li
- Evidence-Based Social Sciences Research Center/Health Technology Assessment Center, School of Public Health, Lanzhou University, Lanzhou, China
| | - Muhammad Muneeb Ahmed
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Clement Lin
- Faculty of Health Sciences, McMaster University, Canada
| | - Maryam Kandi
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Ashwini Sreekanta
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Nima Makhdami
- Internal Medicine Resident, Department of Internal Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Divya Tamilselvan
- Faculty of Health Sciences and Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Dalal S Ali
- Division of Endocrinology and Metabolism, McMaster University, Hamilton, Ontario, Canada
| | - Karel Dandurand
- Division of Endocrinology and Metabolism, McMaster University, Hamilton, Ontario, Canada
| | - Kehu Yang
- Evidence-Based Social Sciences Research Center/Health Technology Assessment Center, School of Public Health, Lanzhou University, Lanzhou, China
| | - John P Bilezikian
- Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Maria Luisa Brandi
- Fondazione Italiana sulla Ricerca sulle Malattie dell'Osso (F.I.R.M.O. Foundation), Florence, Italy
| | - Bart L Clarke
- Mayo Clinic Division of Endocrinology, Diabetes, Metabolism, and Nutrition, Rochester, MN, USA
| | - Michael Mannstadt
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Lars Rejnmark
- Dept of Endocrinology and Internal Medicine, Aarhus University hospital, Aarhus, Denmark
| | - Aliya A Khan
- Division of Endocrinology and Metabolism, McMaster University, Hamilton, Ontario, Canada
| | - Gordon Guyatt
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
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Khan AA, Bilezikian JP, Brandi ML, Clarke BL, Gittoes NJ, Pasieka JL, Rejnmark L, Shoback DM, Potts JT, Guyatt GH, Mannstadt M. Evaluation and Management of Hypoparathyroidism Summary Statement and Guidelines from the Second International Workshop. J Bone Miner Res 2022; 37:2568-2585. [PMID: 36054621 DOI: 10.1002/jbmr.4691] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 08/18/2022] [Accepted: 08/24/2022] [Indexed: 11/10/2022]
Abstract
This clinical practice guideline addresses the prevention, diagnosis, and management of hypoparathyroidism (HypoPT) and provides evidence-based recommendations. The HypoPT task forces included four teams with a total of 50 international experts including representatives from the sponsoring societies. A methodologist (GG) and his team supported the taskforces and conducted the systematic reviews. A formal process following the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) methodology and the systematic reviews provided the structure for seven of the guideline recommendations. The task force used a less structured approach based on narrative reviews for 20 non-GRADEd recommendations. Clinicians may consider postsurgical HypoPT permanent if it persists for >12 months after surgery. To predict which patients will not develop permanent postsurgical HypoPT, we recommend evaluating serum PTH within 12 to 24 hours post total thyroidectomy (strong recommendation, moderate quality evidence). PTH > 10 pg/mL (1.05 pmol/L) virtually excludes long-term HypoPT. In individuals with nonsurgical HypoPT, genetic testing may be helpful in the presence of a positive family history of nonsurgical HypoPT, in the presence of syndromic features, or in individuals younger than 40 years. HypoPT can be associated with complications, including nephrocalcinosis, nephrolithiasis, renal insufficiency, cataracts, seizures, cardiac arrhythmias, ischemic heart disease, depression, and an increased risk of infection. Minimizing complications of HypoPT requires careful evaluation and close monitoring of laboratory indices. In patients with chronic HypoPT, the panel suggests conventional therapy with calcium and active vitamin D metabolites as first-line therapy (weak recommendation, low-quality evidence). When conventional therapy is deemed unsatisfactory, the panel considers the use of PTH. © 2022 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Aliya A Khan
- Department of Medicine, Division of Endocrinology and Metabolism, McMaster University, Hamilton, ON, Canada
| | - John P Bilezikian
- Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | | | - Bart L Clarke
- Mayo Clinic Division of Endocrinology, Diabetes, Metabolism, and Nutrition, Rochester, MN, USA
| | - Neil J Gittoes
- Centre for Endocrinology Diabetes & Metabolism, Queen Elizabeth Hospital, Birmingham, UK
| | - Janice L Pasieka
- Department of Surgery and Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Lars Rejnmark
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Dolores M Shoback
- Endocrine Research Unit, San Francisco Veterans Affairs Medical Center, University of California, San Francisco, CA, USA
| | - John T Potts
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Gordon H Guyatt
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, Canada
| | - Michael Mannstadt
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
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Marcucci G, Beccuti G, Carosi G, Cetani F, Cianferotti L, Colao AM, Di Somma C, Duradoni M, Elefante A, Ghizzoni L, Giusti M, Lania AG, Lavezzi E, Madeo B, Mantovani G, Marcocci C, Masi L, Parri S, Pigliaru F, Santonati A, Spada A, Vera L, Brandi ML. Multicenter retro-prospective observational study on chronic hypoparathyroidism and rhPTH (1-84) treatment. J Endocrinol Invest 2022; 45:1653-1662. [PMID: 35460461 PMCID: PMC9360119 DOI: 10.1007/s40618-022-01800-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Accepted: 03/31/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE The main purpose of this study was to investigate the effects of 12 months of rhPTH (1-84) (Natpar®) treatment in a cohort of patients selected according to the indications of hypoparathyroidism guidelines. The use of recombinant human PTH (1-84) [rhPTH (1-84)] is approved as hormonal replacement therapy in patients with hypoparathyroidism not adequately controlled with conventional therapy. METHODS It is a multicenter, observational, retro-prospective, open label study. Eleven Italian Endocrinological centers, members of Hypoparathyroidism Working Group of the Italian Society of Endocrinology (HypoparaNET) were involved. Main outcome measures were serum and urinary calcium and phosphate concentration, calcium-phosphate product, renal function, oral calcium and vitamin D doses, and clinical manifestations. RESULTS Fourteen adult subjects, affected by chronic hypoparathyroidism, were treated with rhPTH (1-84) for 12 months. At 12 months of rhPTH (1-84) treatment, 61.5% of patients discontinued calcium supplement and 69.2% calcitriol. Mean albumin-adjusted total serum calcium levels quickly normalized after initiation of rhPTH (1-84) treatment compared to baseline (p = 0.009), remaining in the normal range until 12 months. Rare hypo-hypercalcemia episodes were reported. Renal function was maintained normal and no renal complications were reported. Serum and urinary phosphate and urinary calcium were maintained in the normal range. Mean phosphatemia levels linearly decreased from 3 months up to 12 months compared to baseline (p = 0.014). No severe adverse events were described. CONCLUSIONS Biochemical and clinical results confirm the efficacy and safety of rhPTH (1-84) therapy, which represents an important option for hypoparathyroid patients unresponsive to conventional therapy.
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Affiliation(s)
- G Marcucci
- Bone Metabolic Diseases Unit, Department of Biomedical, Experimental and Clinical Sciences, University of Florence, Florence, Italy
| | - G Beccuti
- Department of Medical Sciences, Division of Endocrinology, Diabetes and Metabolism, University of Turin, Corso Dogliotti 14, 10126, Turin, Italy
| | - G Carosi
- Endocrinology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - F Cetani
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - L Cianferotti
- Bone Metabolic Diseases Unit, Department of Biomedical, Experimental and Clinical Sciences, University of Florence, Florence, Italy
| | - A M Colao
- Department of Clinical Medicine and Surgery, Endocrinology Unit, University Medical School of Naples, Via Sergio Pansini 5, 80131, Naples, Italy
| | - C Di Somma
- Department of Clinical Medicine and Surgery, Endocrinology Unit, University Medical School of Naples, Via Sergio Pansini 5, 80131, Naples, Italy
| | - M Duradoni
- Department of Information Engineering, University of Florence, Florence, Italy
| | - A Elefante
- Azienda Ospedaliera Regionale San Carlo, Potenza, Italy
| | - L Ghizzoni
- Department of Medical Sciences, Division of Endocrinology, Diabetes and Metabolism, University of Turin, Corso Dogliotti 14, 10126, Turin, Italy
| | - M Giusti
- Endocrinology Unit, Department of Internal Medicine and Medical Specialties (DiMI), University of Genoa, Genoa, Italy
| | - A G Lania
- Department of Biomedical Sciences, Humanitas University, 20090, Pieve Emanuele, Italy
- Endocrinology, Diabetology and Andrology Unit, Humanitas Clinical and Research Center-IRCCS, 20089, Rozzano, Italy
| | - E Lavezzi
- Endocrinology, Diabetology and Andrology Unit, Humanitas Clinical and Research Center-IRCCS, 20089, Rozzano, Italy
| | - B Madeo
- Unit of Endocrinology, Department of Medical Specialties, Azienda Ospedaliero-Universitaria Di Modena, Modena, Italy
| | - G Mantovani
- Endocrinology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - C Marcocci
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - L Masi
- AUO-Careggi University Hospital, Florence, Italy
| | - S Parri
- Bone Metabolic Diseases Unit, Department of Biomedical, Experimental and Clinical Sciences, University of Florence, Florence, Italy
| | - F Pigliaru
- Endocrinology Unit, Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
| | - A Santonati
- Department of Endocrinology and Diabetology, Azienda Ospedaliera San Giovanni Addolorata, Rome, Italy
| | - A Spada
- Department of Endocrinology and Diabetology, Azienda Ospedaliera San Giovanni Addolorata, Rome, Italy
| | - L Vera
- Endocrinology Unit, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - M L Brandi
- Fondazione Italiana Di Ricerca Sulle Malattie Dell'osso: F.I.R.M.O, Via San Gallo 123, 50100, Florence, Italy.
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Aouchiche K, Reynaud R, Amodru V, Brue T, Cuny T. Teriparatide administration by the Omnipod pump: preliminary experience from two cases with refractory hypoparathyroidism. Endocrine 2022; 76:179-188. [PMID: 34984624 DOI: 10.1007/s12020-021-02978-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 12/27/2021] [Indexed: 11/03/2022]
Abstract
CONTEXT Hypoparathyroidism (hypoPTH) in adults is mainly due to total thyroidectomy. Conventional therapies (calcium, active vitamin D) can fail to normalize calcemia, expose the patient to hypercalciuria and impact quality-of-life. Human parathormone (PTH) replacement therapy is a suitable option in these cases, although few clinical reports have been published so far. METHODS We describe two cases of patients with refractory postsurgical hypoPTH, in whom subcutaneous infusion of recombinant PTH (teriparatide) through the Omnipod® pump was initiated after failure of all other therapeutic options. Besides, we performed a review of literature of hypoPTH cases treated by continuous infusion of teriparatide. RESULTS Two women aged 46 and 61 years old failed to normalize calcemia either with conventional treatments (calcium 8 g/day + calcitriol 9 mcg/day and calcium 5 g/day + calcitriol 12 mcg/day) or with thrice daily subcutaneous injections of teriparatide. As a last resort, teriparatide infusion via Omnipod® device normalized their calcemia and allowed calcium/vitamin D withdrawal, with average teriparatide dose of 23 and 32 mcg/day, respectively. The flow of teriparatide was adapted according to a protocol based on measured calcemia, under medical supervision. In the literature, 15 adult cases (13 women, mean age 44.5 ± 5.2 years old) are reported. HypoPTH was consecutive to surgery in all of them. Mean dose of teriparatide administered was 25 ± 6 mcg/day with improvement of calcemia level and quality-of-life in all patients. CONCLUSIONS Continuous administration of teriparatide through Omnipod® appears as an efficient therapeutic option in refractory hypoPTH, whose administration to the patient can be assisted by medically-supervised protocol.
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Affiliation(s)
- Karine Aouchiche
- Assistance-Publique des Hôpitaux de Marseille (AP-HM), Department of Pediatrics, Hôpital de la Timone Enfants, Marseille, France
| | - Rachel Reynaud
- Assistance-Publique des Hôpitaux de Marseille (AP-HM), Department of Pediatrics, Hôpital de la Timone Enfants, Marseille, France
- Aix-Marseille Université, Institut National de la Santé et de la Recherche Médicale (INSERM), U1251, Marseille Medical Genetics (MMG), Marseille, France
| | - Vincent Amodru
- Aix-Marseille Université, Institut National de la Santé et de la Recherche Médicale (INSERM), U1251, Marseille Medical Genetics (MMG), Marseille, France
- Assistance-Publique des Hôpitaux de Marseille (AP-HM), Department of Endocrinology, Hôpital de la Conception, Marseille, France
| | - Thierry Brue
- Aix-Marseille Université, Institut National de la Santé et de la Recherche Médicale (INSERM), U1251, Marseille Medical Genetics (MMG), Marseille, France
- Assistance-Publique des Hôpitaux de Marseille (AP-HM), Department of Endocrinology, Hôpital de la Conception, Marseille, France
| | - Thomas Cuny
- Aix-Marseille Université, Institut National de la Santé et de la Recherche Médicale (INSERM), U1251, Marseille Medical Genetics (MMG), Marseille, France.
- Assistance-Publique des Hôpitaux de Marseille (AP-HM), Department of Endocrinology, Hôpital de la Conception, Marseille, France.
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Ugalde-Abiega B, Lamas Oliveira C, Alfaro Martínez JJ, Meizoso-Pita O, Sevillano Collantes C, Gomez García I, Perez Rodríguez A, Huguet I. Improving management of severe hypoparathyroidism: a case series. Hormones (Athens) 2022; 21:71-77. [PMID: 34647284 DOI: 10.1007/s42000-021-00326-x] [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: 03/22/2021] [Accepted: 09/20/2021] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Hypoparathyroidism is considered a rare endocrine disease. Despite being a deficiency of parathyroid hormone, the standard therapy is based on oral calcium and active vitamin D supplementation. This approach provides satisfactory management in most cases but may be inadequate for patients in the most complex spectrum of the disease. Other therapies are being explored, and among them, the use of recombinant human parathyroid hormone (PTH) has proved to decrease the requirements of calcium and active vitamin D to reach adequate therapeutic goals. OBJECTIVE We aimed to provide information on the effectiveness of the current recombinant parathyroid hormone analogs in the clinical management of difficult to control cases of hypoparathyroidism. METHOD AND MATERIALS We report our experience using teriparatide and PTH (1-84) through five complex cases of hypoparathyroidism of diverse etiologies. We describe each case and report the effectiveness of treatment in clinical practice. RESULTS Four patients with postsurgical hypoparathyroidism and one patient with autoimmune hypoparathyroidism, all of them with suboptimal control under the standard treatment with calcium and calcitriol supplements or calcium gluconate infusion, are presented. They were all started on teriparatide or PTH (1-84), and all of them showed a diminishment of symptoms and were able to maintain normocalcemia without parenteral calcium despite a reduction of oral treatment. CONCLUSION This article highlights the effectiveness and safety of hormonal replacement treatment in difficult to manage hypoparathyroidism and provides evidence which justifies its off-label prescription in the case of teriparatide. We consider that this treatment should be considered in cases in which standard treatment fails to reach adequate therapeutic goals.
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Affiliation(s)
- Beatriz Ugalde-Abiega
- Hospital Universitario Infanta Leonor, Avda Gran Vía del Este, 80. 28031, Madrid, Spain.
| | | | | | - Olalla Meizoso-Pita
- Hospital Universitario Infanta Leonor, Avda Gran Vía del Este, 80. 28031, Madrid, Spain
| | | | - Inés Gomez García
- Hospital Mancha Centro de Alcázar de San Juan, Alcázar de San Juan, Spain
| | | | - Isabel Huguet
- Hospital Universitario Infanta Leonor, Avda Gran Vía del Este, 80. 28031, Madrid, Spain
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Saraiva M, Chaves AC, Assunção G, Saraiva J, Carvalho R. Continuous Teriparatide Treatment in Chronic Hypoparathyroidism: A Case Report. AMERICAN JOURNAL OF CASE REPORTS 2021; 22:e931739. [PMID: 34389697 PMCID: PMC8370137 DOI: 10.12659/ajcr.931739] [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] [Indexed: 12/30/2022]
Abstract
Patient: Female, 29-year-old
Final Diagnosis: Chronic hypoparathyroidism
Symptoms: Muscle cramps • numbness • tingling in fingers
Medication: —
Clinical Procedure: —
Specialty: Endocrinology and Metabolic
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Affiliation(s)
- Miguel Saraiva
- Division of Endocrinology, Diabetes, and Metabolism, Porto University Hospital Center, Porto, Portugal
| | - Ana Catarina Chaves
- Division of Endocrinology, Diabetes, and Metabolism, Hospital Center of Tâmega and Sousa (CHTS), Penafiel, Portugal
| | - Guilherme Assunção
- Division of Endocrinology, Diabetes, and Metabolism, Porto University Hospital Center, Porto, Portugal
| | - Joana Saraiva
- Division of Endocrinology, Diabetes, and Metabolism, Coimbra Hospital and University Center, Coimbra, Portugal
| | - Rui Carvalho
- Division of Endocrinology, Diabetes, and Metabolism, Porto University Hospital Center, Porto, Portugal
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Ish-Shalom S, Caraco Y, Khazen NS, Gershinsky M, Szalat A, Schwartz P, Arbit E, Galitzer H, Tang JC, Burshtein G, Rothner A, Raskin A, Blum M, Fraser WD. Safety and Efficacy of Oral Human Parathyroid Hormone (1-34) in Hypoparathyroidism: An Open-Label Study. J Bone Miner Res 2021; 36:1060-1068. [PMID: 33666947 PMCID: PMC8252608 DOI: 10.1002/jbmr.4274] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 02/02/2021] [Accepted: 02/10/2021] [Indexed: 12/12/2022]
Abstract
The standard treatment of primary hypoparathyroidism (hypoPT) with oral calcium supplementation and calcitriol (or an analog), intended to control hypocalcemia and hyperphosphatemia and avoid hypercalciuria, remains challenging for both patients and clinicians. In 2015, human parathyroid hormone (hPTH) (1-84) administered as a daily subcutaneous injection was approved as an adjunctive treatment in patients who cannot be well controlled on the standard treatments alone. This open-label study aimed to assess the safety and efficacy of an oral hPTH(1-34) formulation as an adjunct to standard treatment in adult subjects with hypoparathyroidism. Oral hPTH(1-34) tablets (0.75 mg human hPTH(1-34) acetate) were administered four times daily for 16 consecutive weeks, and changes in calcium supplementation and alfacalcidol use, albumin-adjusted serum calcium (ACa), serum phosphate, urinary calcium excretion, and quality of life throughout the study were monitored. Of the 19 enrolled subjects, 15 completed the trial per protocol. A median 42% reduction from baseline in exogenous calcium dose was recorded (p = .001), whereas median serum ACa levels remained above the lower target ACa levels for hypoPT patients (>7.5 mg/dL) throughout the study. Median serum phosphate levels rapidly decreased (23%, p = .0003) 2 hours after the first dose and were maintained within the normal range for the duration of the study. A notable, but not statistically significant, median decrease (21%, p = .07) in 24-hour urine calcium excretion was observed between the first and last treatment days. Only four possible drug-related, non-serious adverse events were reported over the 16-week study, all by the same patient. A small but statistically significant increase from baseline quality of life (5%, p = .03) was reported by the end of the treatment period. Oral hPTH(1-34) treatment was generally safe and well tolerated and allowed for a reduction in exogenous calcium supplementation, while maintaining normocalcemia in adult patients with hypoparathyroidism. © 2021 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Sofia Ish-Shalom
- Endocrine Research Center, Lin Medical Center, Clalit Health Services, Haifa, Israel
| | - Yoseph Caraco
- Hadassah Medical Center, Hebrew University Medical School, Jerusalem, Israel
| | - Nariman Saba Khazen
- Endocrine Research Center, Lin Medical Center, Clalit Health Services, Haifa, Israel
| | - Michal Gershinsky
- Endocrine Research Center, Lin Medical Center, Clalit Health Services, Haifa, Israel
| | - Auryan Szalat
- Hadassah Medical Center, Hebrew University Medical School, Jerusalem, Israel
| | | | - Ehud Arbit
- Entera Bio Ltd, Jerusalem Bio Park, Jerusalem, Israel
| | | | - Jonathan Cy Tang
- Bioanalytical Facility, Biomedical Research Centre, Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK
| | | | - Ariel Rothner
- Entera Bio Ltd, Jerusalem Bio Park, Jerusalem, Israel
| | - Arthur Raskin
- Entera Bio Ltd, Jerusalem Bio Park, Jerusalem, Israel
| | - Miriam Blum
- Entera Bio Ltd, Jerusalem Bio Park, Jerusalem, Israel
| | - William D Fraser
- Bioanalytical Facility, Biomedical Research Centre, Norwich Medical School, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, UK.,Departments of Endocrinology and Clinical Biochemistry, Norfolk and Norwich University Hospital, Norwich, UK
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Marcucci G, Masi L, Cianferotti L, Giusti F, Fossi C, Parri S, Gronchi G, Brandi ML. Chronic hypoparathyroidism and treatment with teriparatide. Endocrine 2021; 72:249-259. [PMID: 33538953 PMCID: PMC8087564 DOI: 10.1007/s12020-020-02577-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 11/26/2020] [Indexed: 12/15/2022]
Abstract
PURPOSE Chronic hypoparathyroidism is usually treated with calcium and active vitamin D metabolites or analogs, despite the fact that their chronic use can lead to long-term complications. The use of hormone replacement therapy with PTH peptides [teriparatide and rhPTH (1-84)] has therefore been proposed. The main purpose of this study was to investigate the efficacy of teriparatide dose at 20 µg once or twice daily, in order to maintain normocalcemia reducing standard treatment, in adult patients with chronic hypoparathyroidism not well controlled with conventional treatment. METHODS The study was a Phase III, open-label, non-comparative, clinical investigation (study period: 3 months), at a tertiary care clinical research center. Thirty patients with chronic hypoparathyroidism were screened, and 12 started teriparatide. After the optimization phase (0-4 weeks), calcium and calcitriol supplements were progressively reduced, while teriparatide 20 µg once daily was administered (5-7 weeks), and then could be titrated up to 20 µg twice daily (7-17 weeks). The main outcome measures included serum and urinary biochemical exams and Rand 36-Item Short Form Health Survey. RESULTS This study showed that teriparatide 20 µg once daily was insufficient to discontinue calcium and calcitriol supplements to maintain normal serum calcium concentrations. Conversely, for more than half of patients treated with teriparatide 20 µg twice daily, calcium and calcitriol administration was avoidable, but in some cases at the expense of serum calcium and phosphate oscillations. CONCLUSIONS Since intervention trials evaluating the efficacy and safety of teriparatide in hypoparathyroid patients are not yet available, the routine use of this molecule poses some doubts.
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Affiliation(s)
- Gemma Marcucci
- Bone Metabolic Diseases Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, University Hospital of Florence, Florence, Italy
| | - Laura Masi
- Bone Metabolic Diseases Unit, University Hospital of Florence, Florence, Italy
| | - Luisella Cianferotti
- Bone Metabolic Diseases Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, University Hospital of Florence, Florence, Italy
| | - Francesca Giusti
- Bone Metabolic Diseases Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, University Hospital of Florence, Florence, Italy
| | - Caterina Fossi
- Bone Metabolic Diseases Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, University Hospital of Florence, Florence, Italy
| | - Simone Parri
- Bone Metabolic Diseases Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, University Hospital of Florence, Florence, Italy
| | - Giorgio Gronchi
- Department of Neurosciences, Psychology, Drug Research, and Child Health, University of Florence, Florence, Italy
| | - Maria Luisa Brandi
- Bone Metabolic Diseases Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, University Hospital of Florence, Florence, Italy.
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Zavatta G, Clarke BL. Challenges in the management of chronic hypoparathyroidism. Endocr Connect 2020; 9:EC-20-0366.R2. [PMID: 33486471 PMCID: PMC7707836 DOI: 10.1530/ec-20-0366] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 09/24/2020] [Indexed: 01/12/2023]
Abstract
The first adjunctive hormone therapy for chronic hypoparathyroidism, recombinant human parathyroid hormone (1-84) [rhPTH(1-84)] was approved by the FDA in January 2015. Since the approval of rhPTH(1-84), growing interest has developed in other agents to treat this disorder in both the scientific community and among pharmaceutical companies. For several reasons, conventional therapy with calcium and activated vitamin D supplementation, magnesium supplementation as needed, and occasionally thiazide-type diuretic therapy remains the mainstay of treatment, while endocrinologists and patients are constantly challenged by limitations of conventional treatment. Serum calcium fluctuations, increased urinary calcium, hyperphosphatemia, and a constellation of symptoms that limit mental and physical functioning are frequently associated with conventional therapy. Understanding how conventional treatment and hormone therapy work in terms of pharmacokinetics and pharmacodynamics is key to effectively managing chronic hypoparathyroidism. Multiple questions remain regarding the effectiveness of PTH adjunctive therapy in preventing or slowing the onset and progression of the classical complications of hypoparathyroidism, such as chronic kidney disease, calcium-containing kidney stones, cataracts, or basal ganglia calcification. Several studies point toward an improvement in quality of life during replacement therapy. This review will discuss current clinical and research challenges posed by treatment of chronic hypoparathyroidism.
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Affiliation(s)
- Guido Zavatta
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
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11
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Abstract
Hypoparathyroidism is a rare endocrine disorder which leads to hypocalcemia, hypercalciuria, and hyperphosphatemia. Complications include nephrocalcinosis with renal dysfunction, reduced quality of life, and abnormal skeletal properties. Conventional therapy with calcium and vitamin D analogs addresses hypocalcemia but has important limitations. Parathyroid hormone (PTH) therapy is a fundamental advance, although the effects of PTH on long-term complications require additional testing. Continuous PTH therapy is likely to be particularly advantageous for addressing renal, quality of life, and skeletal complications. Overall, much progress has been made, yet more information is needed to improve our understanding and management of hypoparathyroidism.
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Affiliation(s)
- Mishaela R Rubin
- Department of Medicine, Metabolic Bone Diseases Unit, Division of Endocrinology, Vagelos College of Physicians & Surgeons, Columbia University, 180 Fort Washington Ave, New York, NY, 10032, USA
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12
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Abstract
BACKGROUND Hypoparathyroidism is a rare endocrine disorder characterized by hypocalcemia and low or undetectable levels of parathyroid hormone. METHODS This review is an evidence-based summary of hypoparathyroidism in terms of relevant pathophysiological, clinical, and therapeutic concepts. RESULTS Many clinical manifestations of hypoparathyroidism are due to the lack of the physiological actions of parathyroid hormone on its 2 major target organs: the skeleton and the kidney. The skeleton is inactive, accruing bone without remodeling it. The kidneys lose the calcium-conserving actions of parathyroid hormone and, thus, excrete a greater fraction of calcium. Biochemical manifestations, besides hypocalcemia and low or undetectable levels of parathyroid hormone, include hyperphosphatemia and low levels of 1,25-dihydroxyvitamin D. Calcifications in the kidney, brain, and other soft tissues are common. Removal of, or damage to, the parathyroid glands at the time of anterior neck surgery is, by far, the most likely etiology. Autoimmune destruction of the parathyroid glands and other genetic causes represent most of the other etiologies. Conventional treatment with calcium and active vitamin D can maintain the serum calcium level but high doses may be required, adding to the risk of long-term soft tissue calcifications. The advent of replacement therapy with recombinant human PTH(1-84) represents a major step in the therapeutics of this disease. CONCLUSIONS Advances in our knowledge of hypoparathyroidism have led to greater understanding of the disease itself and our approach to it.
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Affiliation(s)
- John P Bilezikian
- Department of Medicine, Division of Endocrinology, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York
- Correspondence and Reprint Requests: John P. Bilezikian, Vice-Chair, International Research and Education, Department of Medicine, Vagelos College of Physicians and Surgeons, 630 W. 168th Street, New York, NY 10032. E-mail:
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Palui R, Das RR, Roy A, Kamalanathan S, Kar SS, Sahoo J, Selvarajan S, Satapathy AK. Parathyroid Hormone Replacement versus Oral Calcium and Active Vitamin D Supplementation in Hypoparathyroidism: A Meta-analysis. Indian J Endocrinol Metab 2020; 24:206-214. [PMID: 32699792 PMCID: PMC7333760 DOI: 10.4103/ijem.ijem_579_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/16/2019] [Accepted: 01/07/2020] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVES Chronic hypoparathyroidism is treated conventionally with active vitamin D and high doses of calcium. Recombinant human parathyroid hormone (PTH) replacement is an attractive option for treating patients with hypoparathyroidism since it can replace the physiological action of native PTH. The aim of our study was to perform a comprehensive evaluation of the effects of PTH replacement on calcium homeostasis, bone metabolism, and daily requirement of calcium and active vitamin D. MATERIALS AND METHODS Randomized controlled trials done in chronic hypoparathyroid patients were included in this meta-analysis. The PTH group included subjects receiving a subcutaneous injection of either PTH (1-84) or PTH (1-34) with oral calcium and/or active vitamin D. The control group included those receiving oral calcium and active vitamin D with/without subcutaneous placebo injection. The primary outcome of this meta-analysis was to compare serum calcium, 24-h urinary calcium, and severe adverse effects among PTH and control groups. RESULTS In this meta-analysis, we did not find any difference in serum calcium level between PTH and control groups [mean difference (MD) - 0.01; 95% confidence interval (CI) - 0.09, 0.06; P = 0.71]. Although there was a trend towards low 24-h urinary calcium in the PTH group, the difference was not statistically significant (MD - 1.43; 95% CI - 2.89, 0.03; P = 0.06). The incidence of serious adverse events was also similar in both groups (RR 1.35; 95% CI 0.58, 3.16; P = 0.49). CONCLUSION Both PTH and active vitamin D therapies are associated with comparable serum and urine calcium levels with a similar incidence of serious adverse events in patients with chronic hypoparathyroidism.
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Affiliation(s)
- Rajan Palui
- Department of Endocrinology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Rashmi Ranjan Das
- Department of Paediatrics, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
| | - Ayan Roy
- Department of Endocrinology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Sadishkumar Kamalanathan
- Department of Endocrinology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Sitanshu Sekhar Kar
- Department of Preventive and Social Medicine, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Jayaprakash Sahoo
- Department of Endocrinology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Sandhiya Selvarajan
- Department of Clinical Pharmacology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Amit Kumar Satapathy
- Department of Paediatrics, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
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Alternative treatment of resistant hypoparathyroidism by intermittent infusion of teriparatide using an insulin pump: A case report. Turk J Phys Med Rehabil 2019; 65:198-201. [PMID: 31453563 DOI: 10.5606/tftrd.2019.2718] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 06/14/2018] [Indexed: 11/21/2022] Open
Abstract
Hypoparathyroidism usually responds to oral active vitamin D and calcium, but, although rare, some patients do not respond to this treatment. A 47-year-old Caucasian female presented to our medical unit with classical oral treatment-resistant hypocalcemia after thyroidectomy. Teriparatide was infused through the insulin pump with dosage set to 1 unit which equals to 2.5 μg of teriparatide. In conclusion, intermittent subcutaneous infusion of teriparatide using an insulin pump is a safe and effective treatment modality to ensure normocalcemic conditions in patients with classical treatment-resistant hypoparathyroidism. 39th Turkey Congress of Endocrinology and Metabolic Diseases, May 3-7, 2017, Antalya, Turkey.
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Edafe O, Mech CE, Balasubramanian SP. Calcium, vitamin D or recombinant parathyroid hormone for managing post-thyroidectomy hypoparathyroidism. Cochrane Database Syst Rev 2019; 5:CD012845. [PMID: 31116878 PMCID: PMC6530809 DOI: 10.1002/14651858.cd012845.pub2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND Post-surgical hypoparathyroidism is a common complication after thyroid surgery. The incidence is likely to increase given the rising trend in the annual number of thyroid operations being performed. Measures to prevent post-thyroidectomy hypoparathyroidism including different surgical techniques and prophylactic calcium and vitamin D supplements have been extensively studied. The management of post-thyroidectomy hypoparathyroidism however has not been extensively evaluated. Routine use of calcium and vitamin D supplements in the postoperative period may reduce the risk of symptoms, temporary hypocalcaemia and hospital stay. However, this may lead to overtreatment and has no effect on long-term hypoparathyroidism. Current recommendations on the management of post-thyroidectomy hypoparathyroidism is based on low-quality evidence. Existing guidelines do not often distinguish between surgical and non-surgical hypoparathyroidism, and transient and long-term disease.The aim of this systematic review was to summarise evidence on the use of calcium, vitamin D and recombinant parathyroid hormone in the management of post-thyroidectomy hypoparathyroidism. In addition, we aimed to highlight deficiencies in the current literature and stimulate further work in this field. OBJECTIVES The objective of this systematic review was to assess the effects of calcium, vitamin D and recombinant parathyroid hormone in managing post-thyroidectomy hypoparathyroidism. SEARCH METHODS We searched CENTRAL, MEDLINE, PubMed, Embase as well as ICTRP Search Portal and ClinicalTrials.gov. The date of the last search for all databases was 17 December 2018 (except Embase, which was last searched on 21 December 2017). No language restrictions were applied. SELECTION CRITERIA We planned to include randomised control trials (RCTs) or controlled clinical trials (CCTs) examining the effects of calcium, vitamin D or recombinant parathyroid hormone in people with temporary and long-term post-thyroidectomy hypoparathyroidism. DATA COLLECTION AND ANALYSIS Two review authors independently screened titles, abstracts and full texts for relevance. MAIN RESULTS Database searches yielded a total of 1751 records. We retrieved potentially relevant full texts and excluded articles on the following basis: not a RCT or CCT; intervention, comparator or both did not match prespecified criteria; non-surgical causes of hypoparathyroidism, and studies on prevention. None of the articles was eligible for inclusion in the systematic review. AUTHORS' CONCLUSIONS This systematic review highlights a gap in the current literature and the lack of high-quality evidence in the management of post-thyroidectomy temporary and long-term hypoparathyroidism. Further research focusing on clinically relevant outcomes is needed to examine the effects of current treatments in the management of temporary and long-term post-thyroidectomy hypocalcaemia.
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Affiliation(s)
- Ovie Edafe
- Sheffield Teaching Hospitals NHS Foundation TrustENT DepartmentGlossop RoadSheffieldUKS102JF
| | - Claudia E Mech
- Wrightington, Wigan and Leigh NHS Foundation TrustGeneral SurgeryWigan LaneWiganUKWN1 2NN
| | - Sabapathy P Balasubramanian
- Sheffield Teaching HospitalsEndocrine Surgery, Department of General SurgeryGlossop RoadSheffieldSouth YorkshireUKS10 2JF
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Winer KK, Kelly A, Johns A, Zhang B, Dowdy K, Kim L, Reynolds JC, Albert PS, Cutler GB. Long-Term Parathyroid Hormone 1-34 Replacement Therapy in Children with Hypoparathyroidism. J Pediatr 2018; 203:391-399.e1. [PMID: 30470382 PMCID: PMC6298875 DOI: 10.1016/j.jpeds.2018.08.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 07/26/2018] [Accepted: 08/08/2018] [Indexed: 12/28/2022]
Abstract
OBJECTIVE To determine whether multiple daily injections of parathyroid hormone (PTH) 1-34 are safe and effective as long-term therapy for children with hypoparathyroidism. STUDY DESIGN Linear growth, bone accrual, renal function, and mineral homeostasis were studied in a long-term observational study of PTH 1-34 injection therapy in 14 children. METHODS Subjects were 14 children with hypoparathyroidism attributable to autoimmune polyglandular syndrome type 1 (N = 5, ages 7-12 years) or calcium receptor mutation (N = 9, ages 7-16 years). Mean daily PTH 1-34 dose was 0.75 ± 0.15 µg/kg/day. Treatment duration was 6.9 ± 3.1 years (range 1.5-10 years). Patients were evaluated semiannually at the National Institutes of Health Clinical Center. RESULTS Mean height velocity and lumbar spine, whole body, and femoral neck bone accretion velocities were normal throughout the study. In the first 2 years, distal one-third radius bone accrual velocity was reduced compared with normal children (P < .003). Serum alkaline phosphatase correlated with PTH 1-34 dose (P < .006) and remained normal (235.3 ± 104.8 [SD] U/L, N: 51-332 U/L). Mean serum and 24-hour urine calcium levels were 2.05 ± 0.11 mmol/L (N: 2.05-2.5 mmol/L) and 6.93 ± 1.3 mmol/24 hour (N: 1.25-7.5 mmol/24 hour), respectively-with fewer high urine calcium levels vs baseline during calcitriol and calcium treatment (P < .001). Nephrocalcinosis progressed in 5 of 12 subjects who had repeated renal imaging although renal function remained normal. CONCLUSIONS Twice-daily or thrice-daily subcutaneous PTH 1-34 injections provided safe and effective replacement therapy for up to 10 years in children with hypoparathyroidism because of autoimmune polyglandular syndrome type 1 or calcium receptor mutation.
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Affiliation(s)
- Karen K. Winer
- Eunice Kennedy Shriver NICHD/ National Institutes of Health 6710B Rockledge Dr, Bethesda MD
20892
| | - Andrea Kelly
- Division of Endocrinology, Children’s Hospital of Philadelphia, Philadelphia, PA
| | - Alicia Johns
- PreDoctoral (AJ) and Postdoc (BZ) students in the Division of Intramural Population Health Research, NICHD at
the time of the studies. BZ current address: Dept. of Quantitative Health Sciences, University of Massachusetts Medical School,
Worcester, MA
| | - Bo Zhang
- PreDoctoral (AJ) and Postdoc (BZ) students in the Division of Intramural Population Health Research, NICHD at
the time of the studies. BZ current address: Dept. of Quantitative Health Sciences, University of Massachusetts Medical School,
Worcester, MA
| | | | - Lauren Kim
- NIH Clinical Center, Radiology and Imaging Sciences, Bethesda, MD; James Reynolds: Nuclear Medicine
Division
| | - James C. Reynolds
- NIH Clinical Center, Radiology and Imaging Sciences, Bethesda, MD; James Reynolds: Nuclear Medicine
Division
| | - Paul S. Albert
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH
| | - Gordon B. Cutler
- GBC: Involved in designing and implementing the study, now independent consultant, Deltaville, VA
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Winer KK. Does PTH Replacement Therapy Improve Quality of Life in Patients With Chronic Hypoparathyroidism? J Clin Endocrinol Metab 2018; 103:2752-2755. [PMID: 29897557 PMCID: PMC6276667 DOI: 10.1210/jc.2017-02593] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 04/17/2018] [Indexed: 12/28/2022]
Abstract
Studies have examined the impact of PTH on QoL but have not demonstrated improvements compared with controls. Vokes et al. and Palermo et al. have explored QoL in hypoparathyroidism in response to PTH.
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Affiliation(s)
- Karen K Winer
- Pediatric Growth and Nutrition Branch, National Institute of Child Health and
Human Development, National Institutes of Health, Bethesda, Maryland
- Correspondence and Reprint Requests: Karen K. Winer, MD, Pediatric Growth and Nutrition Branch (PGNB), The Eunice
Kennedy Shriver National Institute of Child Health and Human Development, National
Institutes of Health, 6710B Rockledge Drive, Room 2126, Bethesda, Maryland 20892-7002.
E-mail:
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Affiliation(s)
- Lars Rejnmark
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark.
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Tay D, Cremers S, Bilezikian JP. Optimal dosing and delivery of parathyroid hormone and its analogues for osteoporosis and hypoparathyroidism - translating the pharmacology. Br J Clin Pharmacol 2018; 84:252-267. [PMID: 29049872 PMCID: PMC5777439 DOI: 10.1111/bcp.13455] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 09/30/2017] [Accepted: 10/08/2017] [Indexed: 12/14/2022] Open
Abstract
In primary hyperparathyroidism (PHPT), bone loss results from the resorptive effects of excess parathyroid hormone (PTH). Under physiological conditions, PTH has actions that are more targeted to homeostasis and to bone accrual. The predominant action of PTH, either catabolic, anabolic or homeostatic, can be understood in molecular and pharmacokinetic terms. When administered intermittently, PTH increases bone mass, but when present continuously and in excess (e.g. PHPT), bone loss ensues. This dual effect of PTH depends not only on the dosing regimen, continuous or intermittent, but also on how the PTH molecule interacts with various states of its receptor (PTH/PTHrP receptor) influencing downstream signalling pathways differentially. Altering the amino-terminal end of PTH or PTHrP could emphasize the state of the receptor that is linked to an osteoanabolic outcome. This concept led to the development of a PTHrP analogue that interacts preferentially with the transiently linked state of the receptor, emphasizing an osteoanabolic effect. However, designing PTH or PTHrP analogues with prolonged state of binding to the receptor would be expected to be linked to a homeostatic action associated with the tonic secretory state of the parathyroid glands that is advantageous in treating hypoparathyroidism. Ideally, further development of a drug delivery system that mimics the physiological tonic, circadian, and pulsatile profile of PTH would be optimal. This review discusses basic, translational and clinical studies that may well lead to newer approaches to the treatment of osteoporosis as well as to different PTH molecules that could become more advantageous in treating hypoparathyroidism.
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Affiliation(s)
- Donovan Tay
- Department of Medicine, College of Physicians and SurgeonsColumbia UniversityNew YorkNY10032USA
- Department of MedicineSengkang HealthSingapore
- Osteoporosis and Bone Metabolism Unit, Department of EndocrinologySingapore General HospitalSingapore
| | - Serge Cremers
- Department of Medicine, College of Physicians and SurgeonsColumbia UniversityNew YorkNY10032USA
- Department of Pathology and Cell BiologyColumbia University Medical CenterNew YorkNY10032USA
- Irving Institute for Clinical and Translational ResearchColumbia University Medical CenterNew YorkNY10032USA
| | - John P. Bilezikian
- Department of Medicine, College of Physicians and SurgeonsColumbia UniversityNew YorkNY10032USA
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Krishnan V, Ma YL, Chen CZ, Thorne N, Bullock H, Tawa G, Javella-Cauley C, Chu S, Li W, Kohn W, Adrian MD, Benson C, Liu L, Sato M, Zheng W, Pilon AM, Yang NN, Bryant HU. Repurposing a novel parathyroid hormone analogue to treat hypoparathyroidism. Br J Pharmacol 2017; 175:262-271. [PMID: 28898923 DOI: 10.1111/bph.14028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 08/31/2017] [Accepted: 09/03/2017] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND AND PURPOSE Human parathyroid hormone (PTH) is critical for maintaining physiological calcium homeostasis and plays an important role in the formation and maintenance of the bone. Full-length PTH and a truncated peptide form are approved for treatment of hypoparathyroidism and osteoporosis respectively. Our initial goal was to develop an improved PTH therapy for osteoporosis, but clinical development was halted. The novel compound was then repurposed as an improved therapy for hypoparathyroidism. EXPERIMENTAL APPROACH A longer-acting form of PTH was synthesised by altering the peptide to increase cell surface residence time of the bound ligand to its receptor. In vitro screening identified a compound, which was tested in an animal model of osteoporosis before entering human trials. This compound was subsequently tested in two independent animal models of hypoparathyroidism. KEY RESULTS The peptide identified, LY627-2K, exhibited delayed internalization kinetics. In an ovariectomy-induced bone loss rat model, LY627-2K demonstrated improved vertebral bone mineral density and biomechanical properties at skeletal sites and a modest increase in serum calcium. In a Phase I clinical study, dose-dependent increases in serum calcium were reproduced. These observations prompted us to explore a second indication, hypoparathyroidism. In animal models of this disease, LY627-2K restored serum calcium, comparing favourably to treatment with wild-type PTH. CONCLUSIONS AND IMPLICATIONS We summarize the repositioning of a therapeutic candidate with substantial preclinical and clinical data. Our results support its repurposing and continued development, from a common indication (osteoporosis) to a rare disease (hypoparathyroidism) by exploiting a shared molecular target. LINKED ARTICLES This article is part of a themed section on Inventing New Therapies Without Reinventing the Wheel: The Power of Drug Repurposing. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v175.2/issuetoc.
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Affiliation(s)
- Venkatesh Krishnan
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Yanfei L Ma
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Catherine Z Chen
- Therapeutics for Rare and Neglected Diseases (TRND), National Center for Advancing Translational Sciences (NCATS), NIH, Bethesda, MD, USA
| | - Natasha Thorne
- Therapeutics for Rare and Neglected Diseases (TRND), National Center for Advancing Translational Sciences (NCATS), NIH, Bethesda, MD, USA
| | - Heather Bullock
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Gregory Tawa
- Therapeutics for Rare and Neglected Diseases (TRND), National Center for Advancing Translational Sciences (NCATS), NIH, Bethesda, MD, USA
| | - Christy Javella-Cauley
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Shaoyou Chu
- Lead Optimization Biology, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Weiming Li
- Lead Optimization Biology, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Wayne Kohn
- Biotechnology Discovery Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Mary D Adrian
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Charles Benson
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Lifei Liu
- Lead Optimization Biology, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Masahiko Sato
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
| | - Wei Zheng
- Therapeutics for Rare and Neglected Diseases (TRND), National Center for Advancing Translational Sciences (NCATS), NIH, Bethesda, MD, USA
| | - Andre M Pilon
- Therapeutics for Rare and Neglected Diseases (TRND), National Center for Advancing Translational Sciences (NCATS), NIH, Bethesda, MD, USA
| | - N Nora Yang
- Therapeutics for Rare and Neglected Diseases (TRND), National Center for Advancing Translational Sciences (NCATS), NIH, Bethesda, MD, USA
| | - Henry U Bryant
- Musculoskeletal Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN, USA
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Grebennikova TA, Belaya ZE, Melnichenko GA. Hypoparathyroidism: disease update and new methods of treatment. ENDOCRINE SURGERY 2017. [DOI: 10.14341/serg2017270-80] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Гипопаратиреоз характеризуется гипокальциемией при нормальном или низком уровне паратиреоидного гормона (ПТГ). ПТГ регулирует уровень кальция в крови, влияя на реабсорбцию кальция и фосфора в почках, а также витамин D-зависимое всасывание кальция из желудочно-кишечного тракта. Наиболее распространенной причиной гипопаратиреоза является повреждение околощитовидных желез в ходе хирургического вмешательства в области шеи, в основном по поводу заболеваний щитовидной железы. Стандартные методы лечения включают в себя назначение препаратов кальция и витамина D для поддержания уровня кальция на нижней границе референсного интервала с целью предупреждения гиперкальциурии. Однако в ряде случаев компенсация гипокальциемии требует использования высоких доз препаратов кальция и витамина D, что сопровождается выраженным колебанием уровня кальция крови, внескелетной кальцификацией и ухудшением функции почек. В настоящее время наиболее перспективным методом лечения гипопаратиреоза является заместительная терапия рекомбинантным человеческим ПТГ(1-84), который представляет собой полноразмерный ПТГ. ПТГ(1-84) способствует поддержанию стойкой нормокальциемии, улучшая качество жизни пациентов. Однако влияние ПТГ(1-84) на функцию почек, костный обмен и профилактику других осложнений гипопаратиреоза требует дальнейшего изучения.
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Upreti V, Somani S, Kotwal N. Efficacy of Teriparatide in Patients with Hypoparathyroidism: A Prospective, Open-label Study. Indian J Endocrinol Metab 2017; 21:415-418. [PMID: 28553597 PMCID: PMC5434725 DOI: 10.4103/ijem.ijem_340_16] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
CONTEXT Conventional treatment of hypoparathyroidism with calcium, Vitamin D analogs, and thiazide diuretics is often suboptimal, and these patients have poor quality of life. Teriparatide (parathyroid hormone 1-34 [PTH (1-34)]), an amide of PTH, is widely available for the use in osteoporosis; however, its use in hypoparathyroidism is limited. AIMS The aim of this study is to evaluate the efficacy of PTH (1-34) in the treatment of patients with hypoparathyroidism. SETTINGS AND DESIGN This was a prospective, open-label interventional study in a tertiary care hospital of Indian Armed Forces. SUBJECTS AND METHODS All patients with hypoparathyroidism presented to the endocrinology outpatient department were included and were exhibited injection PTH (1-34) 20 μg twice daily that was gradually reduced to 10 μg twice daily along with calcium, active Vitamin D (alfacalcidol), and hydrochlorothiazide. Oral calcium and alfacalcidol doses were also reduced to maintain serum calcium within normal range. The quality of life (QOL) score was calculated using RAND 36 QOL questionnaire at baseline and termination of the study. STATISTICAL ANALYSIS USED Paired t-test was used to calculate pre- and post-treatment variables. RESULTS Eight patients (two males) were included in this study having mean age of 35.8 years. PTH (1-34) treatment led to the improvement in serum calcium (6.81-8.84 mg/dl), phosphorous (5.8-4.2 mg/dl), and 24 h urinary calcium excretion (416-203.6 mg). Parameters of QOL showed the improvement in overall QOL, physical performance, energy, and fatigue scores. No major adverse events were noted. CONCLUSIONS Treatment of hypoparathyroidism with PTH (1-34) leads to improvement in calcium profile, reduction in hypercalciuria, and improvement in QOL, whereas it is safe and well tolerated.
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Affiliation(s)
- Vimal Upreti
- Department of Endocrinology, Army Hospital (R and R), New Delhi, India
| | - Shrikant Somani
- Department of Endocrinology, Army Hospital (R and R), New Delhi, India
| | - Narendra Kotwal
- Department of Endocrinology, Army Hospital (R and R), New Delhi, India
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Roszko KL, Bi RD, Mannstadt M. Autosomal Dominant Hypocalcemia (Hypoparathyroidism) Types 1 and 2. Front Physiol 2016; 7:458. [PMID: 27803672 PMCID: PMC5067375 DOI: 10.3389/fphys.2016.00458] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Accepted: 09/23/2016] [Indexed: 12/15/2022] Open
Abstract
Extracellular calcium is essential for life and its concentration in the blood is maintained within a narrow range. This is achieved by a feedback loop that receives input from the calcium-sensing receptor (CASR), expressed on the surface of parathyroid cells. In response to low ionized calcium, the parathyroids increase secretion of parathyroid hormone (PTH) which increases serum calcium. The CASR is also highly expressed in the kidneys, where it regulates the reabsorption of calcium from the primary filtrate. Autosomal dominant hypocalcemia (ADH) type 1 is caused by heterozygous activating mutations in the CASR which increase the sensitivity of the CASR to extracellular ionized calcium. Consequently, PTH synthesis and secretion are suppressed at normal ionized calcium concentrations. Patients present with hypocalcemia, hyperphosphatemia, low magnesium levels, and low or low-normal levels of PTH. Urinary calcium excretion is typically increased due to the decrease in circulating PTH concentrations and by the activation of the renal tubular CASR. Therapeutic attempts using CASR antagonists (calcilytics) to treat ADH are currently under investigation. Recently, heterozygous mutations in the alpha subunit of the G protein G11 (Gα11) have been identified in patients with ADH, and this has been classified as ADH type 2. ADH2 mutations lead to a gain-of-function of Gα11, a key mediator of CASR signaling. Therefore, the mechanism of hypocalcemia appears similar to that of activating mutations in the CASR, namely an increase in the sensitivity of parathyroid cells to extracellular ionized calcium. Studies of activating mutations in the CASR and gain-of-function mutations in Gα11 can help define new drug targets and improve medical management of patients with ADH types 1 and 2.
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Affiliation(s)
- Kelly L Roszko
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School Boston, MA, USA
| | - Ruiye D Bi
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School Boston, MA, USA
| | - Michael Mannstadt
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School Boston, MA, USA
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Shimizu M, Joyashiki E, Noda H, Watanabe T, Okazaki M, Nagayasu M, Adachi K, Tamura T, Potts JT, Gardella TJ, Kawabe Y. Pharmacodynamic Actions of a Long-Acting PTH Analog (LA-PTH) in Thyroparathyroidectomized (TPTX) Rats and Normal Monkeys. J Bone Miner Res 2016; 31:1405-12. [PMID: 26865415 PMCID: PMC4935665 DOI: 10.1002/jbmr.2811] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 02/05/2016] [Accepted: 02/08/2016] [Indexed: 11/09/2022]
Abstract
Hypoparathyroidism is a disease of chronic hypocalcemia and hyperphosphatemia due to a deficiency of parathyroid hormone (PTH). PTH and analogs of the hormone are of interest as potential therapies. Accordingly, we examined the pharmacological properties of a long-acting PTH analog, [Ala(1,3,12,18,22) , Gln(10) ,Arg(11) ,Trp(14) ,Lys(26) ]-PTH(1-14)/PTHrP(15-36) (LA-PTH) in thyroparathyroidectomized (TPTX) rats, a model of HP, as well as in normal monkeys. In TPTX rats, a single intravenous administration of LA-PTH at a dose of 0.9 nmol/kg increased serum calcium (sCa) and decreased serum phosphate (sPi) to near-normal levels for longer than 48 hours, whereas PTH(1-34) and PTH(1-84), each injected at a dose 80-fold higher than that used for LA-PTH, increased sCa and decreased sPi only modestly and transiently (<6 hours). LA-PTH also exhibited enhanced and prolonged efficacy versus PTH(1-34) and PTH(1-84) for elevating sCa when administered subcutaneously (s.c.) into monkeys. Daily s.c. administration of LA-PTH (1.8 nmol/kg) into TPTX rats for 28 days elevated sCa to near normal levels without causing hypercalciuria or increasing bone resorption markers, a desirable goal in the treatment of hypoparathyroidism. The results are supportive of further study of long-acting PTH analogs as potential therapies for patients with hypoparathyroidism. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- Masaru Shimizu
- Research Division, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
| | - Eri Joyashiki
- Research Division, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
| | - Hiroshi Noda
- Research Division, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
| | - Tomoyuki Watanabe
- Research Division, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan.,Endocrine Unit, Massachusetts General Hospital, Boston, MA, USA
| | - Makoto Okazaki
- Research Division, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
| | - Miho Nagayasu
- Research Division, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
| | - Kenji Adachi
- Research Division, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
| | - Tatsuya Tamura
- Research Division, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
| | - John T Potts
- Endocrine Unit, Massachusetts General Hospital, Boston, MA, USA
| | | | - Yoshiki Kawabe
- Research Division, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
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Rubin MR, Cusano NE, Fan WW, Delgado Y, Zhang C, Costa AG, Cremers S, Dworakowski E, Bilezikian JP. Therapy of Hypoparathyroidism With PTH(1-84): A Prospective Six Year Investigation of Efficacy and Safety. J Clin Endocrinol Metab 2016; 101:2742-50. [PMID: 27144931 PMCID: PMC4929839 DOI: 10.1210/jc.2015-4135] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
CONTEXT Human recombinant (rh)PTH(1-84) was recently approved for the treatment of refractory hypoparathyroidism, based upon a short-term phase 3 clinical trial. Long-term data are needed, because no time limit was placed on the treatment period. OBJECTIVE We studied the effect of long-term rhPTH(1-84) treatment in hypoparathyroidism for up to 6 years. DESIGN Prospective open-label study. SETTING Referral center. PATIENTS A total of 33 subjects with hypoparathyroidism. INTERVENTIONS rhPTH(1-84) treatment was initiated at a starting dose of 100 μg every other day for 6 years. Due to the availability of new dosages during the 6-year time period of the study, the dose could be and was adjusted for most patients to a daily dosing regimen. MAIN OUTCOME MEASURES Supplemental calcium and vitamin D requirements, serum and urinary calcium (monthly for 6 mo and then biannually), serum phosphorus, bone turnover markers, and bone mineral density (BMD) biannually. RESULTS Treatment with rhPTH(1-84) progressively reduced supplemental calcium requirements over 6 years by 53% (P < .0001) and 1,25-dihydroxyvitamin D requirements by 67% (P < .0001). Sixteen subjects (48%) were able to eliminate 1,25-dihydroxyvitamin D supplementation completely. Serum calcium concentration remained stable, and urinary calcium excretion fell. Lumbar spine BMD increased (3.8 ± 1%, P = .004) as did total hip BMD (2.4 ± 1%, P = .02), whereas femoral neck BMD remained stable and the distal one third radius decreased (-4.4 ±1%, P < .0001). Bone turnover markers increased significantly, reaching a 3-fold peak above baseline values at 1 year and subsequently declining but remaining higher than pretreatment values. Hypercalcemia was uncommon (12 episodes over 6 y; 2.5% of all values). CONCLUSIONS Long-term, continuous therapy of hypoparathyroidism for 6 years with rhPTH(1-84) is associated with reductions in supplemental calcium and calcitriol requirements, stable serum calcium concentration, and reduced urinary calcium excretion. The safety profile remains good. These data represent the longest experience with the therapeutic use of PTH for any condition and demonstrate its long-term efficacy and safety in hypoparathyroidism.
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Affiliation(s)
- Mishaela R Rubin
- Department of Medicine, Metabolic Bone Diseases Unit, Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032
| | - Natalie E Cusano
- Department of Medicine, Metabolic Bone Diseases Unit, Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032
| | - Wen-Wei Fan
- Department of Medicine, Metabolic Bone Diseases Unit, Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032
| | - Yasmine Delgado
- Department of Medicine, Metabolic Bone Diseases Unit, Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032
| | - Chengchen Zhang
- Department of Medicine, Metabolic Bone Diseases Unit, Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032
| | - Aline G Costa
- Department of Medicine, Metabolic Bone Diseases Unit, Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032
| | - Serge Cremers
- Department of Medicine, Metabolic Bone Diseases Unit, Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032
| | - Elzbieta Dworakowski
- Department of Medicine, Metabolic Bone Diseases Unit, Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032
| | - John P Bilezikian
- Department of Medicine, Metabolic Bone Diseases Unit, Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, New York 10032
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Bilezikian JP, Brandi ML, Cusano NE, Mannstadt M, Rejnmark L, Rizzoli R, Rubin MR, Winer KK, Liberman UA, Potts JT. Management of Hypoparathyroidism: Present and Future. J Clin Endocrinol Metab 2016; 101:2313-24. [PMID: 26938200 PMCID: PMC5393596 DOI: 10.1210/jc.2015-3910] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
CONTEXT Conventional management of hypoparathyroidism has focused upon maintaining the serum calcium with oral calcium and active vitamin D, often requiring high doses and giving rise to concerns about long-term consequences including renal and brain calcifications. Replacement therapy with PTH has recently become available. This paper summarizes the results of the findings and recommendations of the Working Group on Management of Hypoparathyroidism. EVIDENCE ACQUISITION Contributing authors reviewed the literature regarding physiology, pathophysiology, and nutritional aspects of hypoparathyroidism, management of acute hypocalcemia, clinical aspects of chronic management, and replacement therapy of hypoparathyroidism with PTH peptides. PubMed and other literature search engines were utilized. EVIDENCE SYNTHESIS Under normal circumstances, interactions between PTH and active vitamin D along with the dynamics of calcium and phosphorus absorption, renal tubular handing of those ions, and skeletal responsiveness help to maintain calcium homeostasis and skeletal health. In the absence of PTH, the gastrointestinal tract, kidneys, and skeleton are all affected, leading to hypocalcemia, hyperphosphatemia, reduced bone remodeling, and an inability to conserve filtered calcium. Acute hypocalcemia can be a medical emergency presenting with neuromuscular irritability. The recent availability of recombinant human PTH (1-84) has given hope that management of hypoparathyroidism with the missing hormone in this disorder will provide better control and reduced needs for calcium and vitamin D. CONCLUSIONS Hypoparathyroidism is associated with abnormal calcium and skeletal homeostasis. Control with calcium and active vitamin D can be a challenge. The availability of PTH (1-84) replacement therapy may usher new opportunities for better control with reduced supplementation requirements.
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Affiliation(s)
- John P Bilezikian
- Columbia University College of Physicians & Surgeons (J.P.B., N.E.C., M.R.R.), New York, New York 10032; Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy; Massachusetts General Hospital (M.M., J.T.P.), Boston, Massachusetts 02114; Aarhus University Hospital (L.R.), 8000 Aarhus, Denmark; Geneva University Hospitals and Faculty of Medicine (R.R.), 1205 Geneva, Switzerland; Eunice Kennedy Shriver National Institute of Child Health and Human Development (K.K.W.), National Institutes of Health, Bethesda, Maryland 20892; and Sackler School of Medicine (U.A.L.), Tel Aviv University, Tel Aviv 6997801, Israel
| | - Maria Luisa Brandi
- Columbia University College of Physicians & Surgeons (J.P.B., N.E.C., M.R.R.), New York, New York 10032; Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy; Massachusetts General Hospital (M.M., J.T.P.), Boston, Massachusetts 02114; Aarhus University Hospital (L.R.), 8000 Aarhus, Denmark; Geneva University Hospitals and Faculty of Medicine (R.R.), 1205 Geneva, Switzerland; Eunice Kennedy Shriver National Institute of Child Health and Human Development (K.K.W.), National Institutes of Health, Bethesda, Maryland 20892; and Sackler School of Medicine (U.A.L.), Tel Aviv University, Tel Aviv 6997801, Israel
| | - Natalie E Cusano
- Columbia University College of Physicians & Surgeons (J.P.B., N.E.C., M.R.R.), New York, New York 10032; Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy; Massachusetts General Hospital (M.M., J.T.P.), Boston, Massachusetts 02114; Aarhus University Hospital (L.R.), 8000 Aarhus, Denmark; Geneva University Hospitals and Faculty of Medicine (R.R.), 1205 Geneva, Switzerland; Eunice Kennedy Shriver National Institute of Child Health and Human Development (K.K.W.), National Institutes of Health, Bethesda, Maryland 20892; and Sackler School of Medicine (U.A.L.), Tel Aviv University, Tel Aviv 6997801, Israel
| | - Michael Mannstadt
- Columbia University College of Physicians & Surgeons (J.P.B., N.E.C., M.R.R.), New York, New York 10032; Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy; Massachusetts General Hospital (M.M., J.T.P.), Boston, Massachusetts 02114; Aarhus University Hospital (L.R.), 8000 Aarhus, Denmark; Geneva University Hospitals and Faculty of Medicine (R.R.), 1205 Geneva, Switzerland; Eunice Kennedy Shriver National Institute of Child Health and Human Development (K.K.W.), National Institutes of Health, Bethesda, Maryland 20892; and Sackler School of Medicine (U.A.L.), Tel Aviv University, Tel Aviv 6997801, Israel
| | - Lars Rejnmark
- Columbia University College of Physicians & Surgeons (J.P.B., N.E.C., M.R.R.), New York, New York 10032; Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy; Massachusetts General Hospital (M.M., J.T.P.), Boston, Massachusetts 02114; Aarhus University Hospital (L.R.), 8000 Aarhus, Denmark; Geneva University Hospitals and Faculty of Medicine (R.R.), 1205 Geneva, Switzerland; Eunice Kennedy Shriver National Institute of Child Health and Human Development (K.K.W.), National Institutes of Health, Bethesda, Maryland 20892; and Sackler School of Medicine (U.A.L.), Tel Aviv University, Tel Aviv 6997801, Israel
| | - René Rizzoli
- Columbia University College of Physicians & Surgeons (J.P.B., N.E.C., M.R.R.), New York, New York 10032; Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy; Massachusetts General Hospital (M.M., J.T.P.), Boston, Massachusetts 02114; Aarhus University Hospital (L.R.), 8000 Aarhus, Denmark; Geneva University Hospitals and Faculty of Medicine (R.R.), 1205 Geneva, Switzerland; Eunice Kennedy Shriver National Institute of Child Health and Human Development (K.K.W.), National Institutes of Health, Bethesda, Maryland 20892; and Sackler School of Medicine (U.A.L.), Tel Aviv University, Tel Aviv 6997801, Israel
| | - Mishaela R Rubin
- Columbia University College of Physicians & Surgeons (J.P.B., N.E.C., M.R.R.), New York, New York 10032; Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy; Massachusetts General Hospital (M.M., J.T.P.), Boston, Massachusetts 02114; Aarhus University Hospital (L.R.), 8000 Aarhus, Denmark; Geneva University Hospitals and Faculty of Medicine (R.R.), 1205 Geneva, Switzerland; Eunice Kennedy Shriver National Institute of Child Health and Human Development (K.K.W.), National Institutes of Health, Bethesda, Maryland 20892; and Sackler School of Medicine (U.A.L.), Tel Aviv University, Tel Aviv 6997801, Israel
| | - Karen K Winer
- Columbia University College of Physicians & Surgeons (J.P.B., N.E.C., M.R.R.), New York, New York 10032; Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy; Massachusetts General Hospital (M.M., J.T.P.), Boston, Massachusetts 02114; Aarhus University Hospital (L.R.), 8000 Aarhus, Denmark; Geneva University Hospitals and Faculty of Medicine (R.R.), 1205 Geneva, Switzerland; Eunice Kennedy Shriver National Institute of Child Health and Human Development (K.K.W.), National Institutes of Health, Bethesda, Maryland 20892; and Sackler School of Medicine (U.A.L.), Tel Aviv University, Tel Aviv 6997801, Israel
| | - Uri A Liberman
- Columbia University College of Physicians & Surgeons (J.P.B., N.E.C., M.R.R.), New York, New York 10032; Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy; Massachusetts General Hospital (M.M., J.T.P.), Boston, Massachusetts 02114; Aarhus University Hospital (L.R.), 8000 Aarhus, Denmark; Geneva University Hospitals and Faculty of Medicine (R.R.), 1205 Geneva, Switzerland; Eunice Kennedy Shriver National Institute of Child Health and Human Development (K.K.W.), National Institutes of Health, Bethesda, Maryland 20892; and Sackler School of Medicine (U.A.L.), Tel Aviv University, Tel Aviv 6997801, Israel
| | - John T Potts
- Columbia University College of Physicians & Surgeons (J.P.B., N.E.C., M.R.R.), New York, New York 10032; Department of Surgery and Translational Medicine (M.L.B.), University of Florence, 50121 Florence, Italy; Massachusetts General Hospital (M.M., J.T.P.), Boston, Massachusetts 02114; Aarhus University Hospital (L.R.), 8000 Aarhus, Denmark; Geneva University Hospitals and Faculty of Medicine (R.R.), 1205 Geneva, Switzerland; Eunice Kennedy Shriver National Institute of Child Health and Human Development (K.K.W.), National Institutes of Health, Bethesda, Maryland 20892; and Sackler School of Medicine (U.A.L.), Tel Aviv University, Tel Aviv 6997801, Israel
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Winer KK. Perspectives on the Search for a True Physiologic Replacement Therapy for Hypoparathyroidism. EUROPEAN ENDOCRINOLOGY 2016; 12:47-48. [PMID: 29632590 PMCID: PMC5813461 DOI: 10.17925/ee.2016.12.01.47] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 03/10/2016] [Indexed: 01/11/2023]
Abstract
Over the past two decades, we have studied various parathyroid hormone (PTH) 1-34 regimens, including once-daily and twice-daily injections without the concurrent conventional therapy. We recently studied PTH delivery by insulin pump, which produced normal, steady-state serum and urine calcium levels. The recent approval of PTH 1-84 represents an important milestone in the treatment of hypoparathyroidism. As PTH 1-84 and PTH 1-34 have similar pharmacokinetic (PK) and pharmacodynamic profiles, one can assume that many of the principles learned from studies of PTH 1-34 also apply to PTH 1-84 in the management of this rare disease.
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Affiliation(s)
- Karen K Winer
- NICHD, National Institutes of Health, Bethesda, Maryland, US
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Rejnmark L, Underbjerg L, Sikjaer T. Hypoparathyroidism: Replacement Therapy with Parathyroid Hormone. Endocrinol Metab (Seoul) 2015; 30:436-42. [PMID: 26394728 PMCID: PMC4722396 DOI: 10.3803/enm.2015.30.4.436] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 09/16/2015] [Accepted: 09/21/2015] [Indexed: 11/24/2022] Open
Abstract
Hypoparathyroidism (HypoPT) is characterized by low serum calcium levels caused by an insufficient secretion of parathyroid hormone (PTH). Despite normalization of serum calcium levels by treatment with activated vitamin D analogues and calcium supplementation, patients are suffering from impaired quality of life (QoL) and are at increased risk of a number of comorbidities. Thus, despite normalization of calcium levels in response to conventional therapy, this should only be considered as an apparent normalization, as patients are suffering from a number of complications and calcium-phosphate homeostasis is not normalized in a physiological manner. In a number of recent studies, replacement therapy with recombinant human PTH (rhPTH(1-84)) as well as therapy with the N-terminal PTH fragment (rhPTH(1-34)) have been investigated. Both drugs have been shown to normalize serum calcium while reducing needs for activated vitamin D and calcium supplements. However, once a day injections cause large fluctuations in serum calcium. Twice a day injections diminish fluctuations, but don't restore the normal physiology of calcium homeostasis. Recent studies using pump-delivery have shown promising results on maintaining normocalcemia with minimal fluctuations in calcium levels. Further studies are needed to determine whether this may improve QoL and lower risk of complications. Such data are needed before replacement with the missing hormone can be recommended as standard therapy.
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Affiliation(s)
- Lars Rejnmark
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark.
| | - Line Underbjerg
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Tanja Sikjaer
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
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Impact of recombinant PTH on management of hypoparathyroidism: a systematic review. Eur Arch Otorhinolaryngol 2015; 273:827-35. [PMID: 25567344 DOI: 10.1007/s00405-014-3484-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Accepted: 12/25/2014] [Indexed: 10/24/2022]
Abstract
The treatment of post-surgical hypoparathyroidism (following thyroid or parathyroid surgery) is challenging. Presently, this condition is treated with calcium and vitamin D supplements rather than replacing the missing parathyroid hormone. Not only is it challenging to maintain normocalcaemia, but concerns of hypercalciuria and ectopic calcification have also been raised using these supplements. There is an ongoing debate whether recombinant parathyroid hormone (rPTH), which as yet is unlicensed for treating hypoPTH, may offer a more physiological solution. The objective of the study was to assess the effectiveness and safety of rPTH in maintaining normocalcaemia and normocalcuria in hypoparathyroidism. This was a systematic review performed using independently developed search strategies including Medline, Embase, CINAHL, Cochrane, Zetoc, conference proceedings and a manual search until 15 July 2014. Data extraction was undertaken by one reviewer (YR). Studies were synthesised through narrative review with tabulation of results. Of 2,141 studies identified, only eleven studies fitted the inclusion criteria. These studies suggest that rPTH is useful in normalising serum calcium levels. Excretion of urinary calcium levels is reduced with PTH 1-34 but remained unchanged in a number of studies using PTH 1-84. Recombinant PTH is well tolerated. The majority of studies included post-surgical hypoparathyroidism with marked heterogeneity. Further prospective, larger, long-term trials are necessary to evaluate the long-term efficacy and adverse profile of rPTH, including head to head comparisons between PTH 1-34 and PTH 1-84.
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Cusano NE, Rubin MR, Bilezikian JP. PTH(1-84) replacement therapy for the treatment of hypoparathyroidism. Expert Rev Endocrinol Metab 2015; 10:5-13. [PMID: 25705243 PMCID: PMC4334142 DOI: 10.1586/17446651.2015.971755] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Hypoparathyroidism is a rare disease characterized by hypocalcemia and insufficient circulating levels of parathyroid hormone (PTH). Conventional therapy includes calcium and active vitamin D supplementation, often in large doses. Therapy with calcium and vitamin D, however, does not address certain problematic aspects of the disease, including abnormal bone metabolism and reduced quality of life. Hypoparathyroidism is the only classic endocrine deficiency disease for which the missing hormone, PTH, is not yet an approved treatment. PTH(1-84) may soon become a therapeutic option for patients with hypoparathyroidism. PTH (1-84) has been demonstrated to maintain serum calcium while reducing or eliminating requirements for calcium and active vitamin D supplementation. Data from bone densitometry, bone turnover markers and histomorphometry of bone biopsy specimens show positive structural and dynamic effects on the skeleton. PTH replacement therapy may also be associated with improved quality of life. PTH(1-84) replacement therapy for hypoparathyroidism is promising, although further acquisition of long-term data is needed.
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Affiliation(s)
- Natalie E Cusano
- Author for correspondence: Tel.: +1 212 305 6486, Fax: +1 212 305 2801,
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31
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Abstract
Hypoparathyroidism is a disease characterized by hypocalcemia and insufficient parathyroid hormone (PTH). It is a rare disorder that has been given an orphan disease designation in the United States and European Union. Hypoparathyroidism is the only endocrine deficiency disease for which the missing hormone, PTH, is not yet an approved therapy. Conventional therapy includes calcium and active vitamin D supplementation, often in large doses. Although serum calcium can be controlled with conventional therapy, it can be a challenge and, moreover, does not address other aspects of the disease, such as abnormal skeletal features and reduced quality of life. This review focuses on PTH replacement therapy in hypoparathyroidism, utilizing the full-length molecule PTH(1-84) as well as the fully active but truncated form PTH(1-34). PTH therapy addresses some aspects of the disease not ameliorated with conventional therapy.
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Affiliation(s)
- Natalie E Cusano
- Department of Medicine, Division of Endocrinology, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, PH 8W-864, New York, NY 10032, USA.
| | - Mishaela R Rubin
- Department of Medicine, Division of Endocrinology, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, PH 8W-864, New York, NY 10032, USA.
| | - John P Bilezikian
- Department of Medicine, Division of Endocrinology, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, PH 8W-864, New York, NY 10032, USA.
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Effects of pump versus twice-daily injection delivery of synthetic parathyroid hormone 1-34 in children with severe congenital hypoparathyroidism. J Pediatr 2014; 165:556-63.e1. [PMID: 24948345 PMCID: PMC4174419 DOI: 10.1016/j.jpeds.2014.04.060] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 03/06/2014] [Accepted: 04/30/2014] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To compare the response with synthetic human parathyroid hormone (PTH) 1-34 delivered by twice-daily injection vs insulin pump in children with severe congenital hypoparathyroidism due to calcium receptor mutation or autoimmune polyglandular syndrome type 1. STUDY DESIGN Children and young adults aged 7-20 years with congenital hypoparathyroidism (N = 12) were randomized to receive PTH 1-34, delivered either by twice-daily subcutaneous injection or insulin pump for 13 weeks, followed by crossover to the opposite delivery method. The principal outcome measures were serum and urine calcium levels. Secondary outcomes included serum and urine magnesium and phosphate levels and bone turnover markers. RESULTS PTH 1-34 delivered via pump produced near normalization of mean serum calcium (2.02 ± 0.05 [pump] vs 1.88 ± 0.03 [injection] mmol/L, P < .05, normal 2.05-2.5 mmol/L), normalized mean urine calcium excretion (5.17 ± 1.10 [pump] vs 6.67 ± 0.76 mmol/24 h/1.73 m(2), P = .3), and significantly reduced markers of bone turnover (P < .02). Serum and urine calcium and magnesium showed a biphasic pattern during twice-daily injection vs minimal fluctuation during pump delivery. The PTH 1-34 dosage was markedly reduced during pump delivery (0.32 ± 0.04 vs 0.85 ± 0.11 μg/kg/d, P < .001), and magnesium supplements were also reduced (P < .001). CONCLUSION Compared with twice-daily delivery, pump delivery of PTH 1-34 provides more physiologic calcium homeostasis and bone turnover in children with severe congenital hypoparathyroidism.
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Abstract
Hypoparathyroidism is a disorder characterized by hypocalcemia, deficient PTH, and abnormal bone remodeling. Standard treatment of hypoparathyroidism consists of oral calcium and vitamin D supplementation. However, maintaining serum calcium levels can be a challenge. In addition, concerns exist regarding hypercalciuria and ectopic calcifications that can be associated with such treatment. Hypoparathyroidism is the only classic endocrine deficiency disease for which the missing hormone, PTH, is not yet an approved treatment. This review focuses on the use of PTH in the treatment of hypoparathyroidism, in the form of teriparatide [PTH(1-34)] and the full-length molecule, PTH(1-84). Studies in hypoparathyroid subjects demonstrate that PTH(1-34) and PTH(1-84) lower or abolish supplemental calcium and vitamin D requirements as well as increase markers of bone turnover. Densitometric and histomorphometric studies in some subjects treated with PTH(1- 34) and PTH(1-84) show an improvement in bone-remodeling dynamics and return of bone metabolism toward normal levels. Given the chronic nature of hypoparathyroidism, and the expectation that PTH will be used for extended periods of time in hypoparathyroidism, further studies are needed to determine the long-term safety of PTH therapy in this population.
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Affiliation(s)
- N E Cusano
- Department of Medicine, Division of Endocrinology, College of Physicians & Surgeons, Columbia University, New York, NY, USA
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34
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Mitchell DM, Regan S, Cooley MR, Lauter KB, Vrla MC, Becker CB, Burnett-Bowie SAM, Mannstadt M. Long-term follow-up of patients with hypoparathyroidism. J Clin Endocrinol Metab 2012; 97:4507-14. [PMID: 23043192 PMCID: PMC3513540 DOI: 10.1210/jc.2012-1808] [Citation(s) in RCA: 235] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Despite tremendous interest in hypoparathyroidism, large cohort studies describing typical treatment patterns, laboratory parameters, and rates of complications are lacking. OBJECTIVE Our objective was to characterize the course of disease in a large cohort of hypoparathyroid patients. DESIGN AND SETTING We conducted a chart review of patients with permanent hypoparathyroidism identified via a clinical patient data registry. Patients were seen at a Boston tertiary-care hospital system between 1988 and 2009. PATIENTS We identified 120 patients. Diagnosis was confirmed by documented hypocalcemia with a simultaneous low or inappropriately normal PTH level for at least 1 yr. Mean age at the end of the observation period was 52 ± 19 (range 2-87) yr, and the cohort was 73% female. MAIN OUTCOME MEASURE We evaluated serum and urine laboratory results and renal and brain imaging. RESULTS We calculated time-weighted average serum calcium measurements for all patients. The time-weighted average for calcium was between 7.5 and 9.5 mg/dl for the majority (88%) of patients. Using linear interpolation, we estimated the proportion of time within the target calcium range for each patient with a median of 86% (interquartile range 67-98%). Of those with a 24-h urine collection for calcium (n = 53), 38% had at least one measurement over 300 mg/d. Of those with renal imaging (n = 54), 31% had renal calcifications, and 52% of those with head imaging (n = 31) had basal ganglia calcifications. Rates of chronic kidney disease stage 3 or higher were 2- to 17-fold greater than age-appropriate norms. CONCLUSIONS Hypoparathyroidism and its treatment carry a large burden of disease. Renal abnormalities are particularly common.
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Affiliation(s)
- Deborah M Mitchell
- Endocrine Unit, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
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35
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Gafni RI, Brahim JS, Andreopoulou P, Bhattacharyya N, Kelly MH, Brillante BA, Reynolds JC, Zhou H, Dempster DW, Collins MT. Daily parathyroid hormone 1-34 replacement therapy for hypoparathyroidism induces marked changes in bone turnover and structure. J Bone Miner Res 2012; 27:1811-20. [PMID: 22492501 PMCID: PMC3399961 DOI: 10.1002/jbmr.1627] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Parathyroid hormone (PTH) has variable actions on bone. Chronically increased PTH is catabolic and leads to osteoporosis; yet intermittent administration is anabolic and increases bone mass. PTH deficiency is associated with decreased bone remodeling and increased bone mass. However, the effects of PTH replacement therapy on bone in hypoparathyroidism are not well known. We discontinued calcitriol therapy and treated 5 hypoparathyroid subjects (2 adults and 3 adolescents) with synthetic human PTH 1-34 (hPTH 1-34), injected two to three times daily for 18 months, with doses individualized to maintain serum calcium at 1.9 to 2.25 mmol/L. Biochemical markers and bone mineral density (BMD) were assessed every 6 months; iliac-crest biopsies were performed before and after 1 year of treatment. hPTH 1-34 therapy significantly increased bone markers to supranormal levels. Histomorphometry revealed that treatment dramatically increased cancellous bone volume and trabecular number and decreased trabecular separation. Changes in trabecular width were variable, suggesting that the increase in trabecular number was due to the observed intratrabecular tunneling. Cortical width remained unchanged; however, hPTH 1-34 treatment increased cortical porosity. Cancellous bone remodeling was also stimulated, inducing significant changes in osteoid, mineralizing surface, and bone formation rate. Similar changes were seen in endocortical and intracortical remodeling. BMD Z-scores were unchanged at the spine and femoral neck. Total hip Z-scores increased; however, total body BMD Z-scores decreased during the first 6 months of treatment and then stabilized, remaining significantly decreased compared to baseline. Radial Z-scores also decreased with treatment; this was most pronounced in the growing adolescent. Daily hPTH 1-34 therapy for hypoparathyroidism stimulated bone turnover, increased bone volume, and altered bone structure in the iliac crest. These findings suggest that treatment with hPTH 1-34 in hypoparathyroid adults and adolescents has varying effects in the different skeletal compartments, leading to an increase in trabecular bone and an apparent trabecularization of cortical bone.
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Affiliation(s)
- Rachel I Gafni
- Skeletal Clinical Studies Unit, Craniofacial and Skeletal Diseases Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892-4320, USA.
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Cusano NE, Rubin MR, Sliney J, Bilezikian JP. Mini-review: new therapeutic options in hypoparathyroidism. Endocrine 2012; 41:410-4. [PMID: 22311174 PMCID: PMC3690471 DOI: 10.1007/s12020-012-9618-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2011] [Accepted: 01/24/2012] [Indexed: 12/30/2022]
Abstract
Hypoparathyroidism is a disorder characterized by hypocalcemia and low or absent parathyroid hormone (PTH). While standard treatment of hypoparathyroidism consists of oral calcium and vitamin D supplementation, maintaining serum calcium levels can be a challenge, and concerns exist regarding hypercalciuria and ectopic calcifications that can be associated with such treatment. Hypoparathyroidism is the only classic endocrine deficiency disease for which the missing hormone, PTH, is not yet an approved treatment. This mini-review focuses on the use of PTH in the treatment of hypoparathyroidism. There are two available formulations of PTH: teriparatide [human PTH(1-34)] and the full-length molecule, PTH(1-84). Both PTH(1-34) and PTH(1-84) lower supplemental vitamin D requirements and increase markers of bone turnover. Densitometric and histomorphometric studies in some subjects treated with PTH(1-84) demonstrate improvement in abnormal bone-remodeling dynamics and return of bone metabolism toward normal euparathyroid levels. Further detailed examination of skeletal features following therapy with the different treatment regimens and data regarding the effect of PTH on quality of life measures are under active investigation.
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Affiliation(s)
- Natalie E Cusano
- Division of Endocrinology, Department of Medicine, College of Physicians & Surgeons, Columbia University, 630 West 168th Street, PH 8W-864, New York, NY 10032, USA
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Abstract
Osteoporosis is a condition of impaired bone strength that results in an increased risk of fracture. The current and most popular pharmacological options for the treatment of osteoporosis include antiresorptive therapy, in particular, oral bisphosphonates (alendronate, risedronate, ibandronate). Anabolic agents like teriparatide have widened our therapeutic options. They act by directly stimulating bone formation and improving bone mass quantity and quality. Two forms of recombinant human parathyroid hormone (PTH) are available : full-length PTH (PTH 1-84; approved in the EU only) and the 1-34 N-terminal active fragment of PTH (teriparatide, US FDA approved). This review aims to discuss the benefits of teriparatide beyond the currently licensed indications like fracture healing, dental stability, osteonecrosis of jaw, hypoparathyroidism, and hypocalcemia.
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Affiliation(s)
- Marilyn Lee Cheng
- Department of Endocrinology, Khoo Teck Puat Hospital, 90 Yishun Central, Singapore
| | - Vishal Gupta
- Department of Endocrinology, Jaslok Hospital and Research Centre, Mumbai, India
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Body JJ, Bergmann P, Boonen S, Devogelaer JP, Gielen E, Goemaere S, Kaufman JM, Rozenberg S, Reginster JY. Extraskeletal benefits and risks of calcium, vitamin D and anti-osteoporosis medications. Osteoporos Int 2012; 23 Suppl 1:S1-23. [PMID: 22311111 PMCID: PMC3273686 DOI: 10.1007/s00198-011-1891-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Accepted: 12/19/2011] [Indexed: 12/11/2022]
Abstract
UNLABELLED Drugs used for the prevention and the treatment of osteoporosis exert various favourable and unfavourable extra-skeletal effects whose importance is increasingly recognized notably for treatment selection. INTRODUCTION The therapeutic armamentarium for the prevention and the treatment of osteoporosis is increasingly large, and possible extra-skeletal effects of available drugs could influence the choice of a particular compound. METHODS The present document is the result of a national consensus, based on a systematic and critical review of the literature. RESULTS Observational research has suggested an inverse relationship between calcium intake and cardiovascular diseases, notably through an effect on blood pressure, but recent data suggest a possible deleterious effect of calcium supplements on cardiovascular risk. Many diverse studies have implicated vitamin D in the pathogenesis of clinically important non-skeletal functions or diseases, especially muscle function, cardiovascular disease, autoimmune diseases and common cancers. The possible effects of oral or intravenous bisphosphonates are well-known. They have been associated with an increased risk of oesophageal cancer or atrial fibrillation, but large-scale studies have not found any association with bisphosphonate use. Selective oestrogen receptor modulators have demonstrated favourable or unfavourable extra-skeletal effects that vary between compounds. Strontium ranelate has a limited number of non-skeletal effects. A reported increase in the risk of venous thromboembolism is not found in observational studies, and very rare cases of cutaneous hypersensitivity reactions have been reported. Denosumab has been introduced recently, and its extra-skeletal effects still have to be assessed. CONCLUSION Several non-skeletal effects of bone drugs are well demonstrated and influence treatment choices.
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Affiliation(s)
- J.-J. Body
- Department of Medicine, CHU Brugmann, Université Libre de Bruxelles, Brussels, Belgium
| | - P. Bergmann
- Department of Radioisotopes, CHU Brugmann, Université Libre de Bruxelles, Brussels, Belgium
| | - S. Boonen
- Center for Metabolic Bone Diseases, Katholieke University Leuven, Leuven, Belgium
| | - J.-P. Devogelaer
- Department of Rheumatology, Saint Luc University Hospital, Université Catholique de Louvain, Brussels, Belgium
| | - E. Gielen
- Gerontology and Geriatrics Section, Department of Experimental Medicine, K.U.Leuven, Leuven, Belgium
| | - S. Goemaere
- Department of Rheumatology and Endocrinology, State University of Gent, Gent, Belgium
| | - J.-M. Kaufman
- Department of Endocrinology, State University of Gent, Gent, Belgium
| | - S. Rozenberg
- Department of Gynaecology–Obstetrics, Université Libre de Bruxelles, Brussels, Belgium
| | - J.-Y. Reginster
- Department of Public Health, Epidemiology and Health Economics, University of Liège, Liège, Belgium
- Bone and Cartilage Metabolism Research Unit, CHU Centre-Ville, Policliniques L. BRULL, Quai Godefroid Kurth 45 (9ème étage), 4020 Liege, Belgium
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Winer KK, Zhang B, Shrader JA, Peterson D, Smith M, Albert PS, Cutler GB. Synthetic human parathyroid hormone 1-34 replacement therapy: a randomized crossover trial comparing pump versus injections in the treatment of chronic hypoparathyroidism. J Clin Endocrinol Metab 2012; 97:391-9. [PMID: 22090268 PMCID: PMC3275355 DOI: 10.1210/jc.2011-1908] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
CONTEXT Vitamin D therapy for hypoparathyroidism does not restore PTH-dependent renal calcium reabsorption, which can lead to renal damage. An alternative approach, PTH 1-34 administered twice daily, provides acceptable long-term treatment but is associated with nonphysiological serum calcium fluctuation. OBJECTIVE Our objective was to compare continuous PTH 1-34 delivery, by insulin pump, with twice-daily delivery. RESEARCH DESIGN AND METHODS In a 6-month, open-label, randomized, crossover trial, PTH 1-34 was delivered by pump or twice-daily sc injection. After each 3-month study period, serum and 24-h urine mineral levels and bone turnover markers were measured daily for 3 d, and 24-h biochemical profiles were determined for serum minerals and 1,25-dihydroxyvitamin D(3) and for urine minerals and cAMP. STUDY PARTICIPANTS AND SETTING: Eight patients with postsurgical hypoparathyroidism (mean ± sd age 46 ± 5.6 yr) participated at a tertiary care referral center. RESULTS Pump vs. twice-daily delivery of PTH 1-34 produced less fluctuation in serum calcium, a more than 50% reduction in urine calcium (P = 0.002), and a 65% reduction in the PTH dose to maintain eucalcemia (P < 0.001). Pump delivery also produced higher serum magnesium level (P = 0.02), normal urine magnesium, and reduced need for magnesium supplements. Finally, pump delivery normalized bone turnover markers and significantly lowered urinary cross-linked N-telopeptide of type 1 collagen and pyridinium crosslinks compared with twice-daily injections (P < 0.05). CONCLUSION Pump delivery of PTH 1-34 provides the closest approach to date to physiological replacement therapy for hypoparathyroidism.
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Affiliation(s)
- Karen K Winer
- The Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland 20892-7510, USA.
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40
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Bilezikian JP, Khan A, Potts JT, Brandi ML, Clarke BL, Shoback D, Jüppner H, D'Amour P, Fox J, Rejnmark L, Mosekilde L, Rubin MR, Dempster D, Gafni R, Collins MT, Sliney J, Sanders J. Hypoparathyroidism in the adult: epidemiology, diagnosis, pathophysiology, target-organ involvement, treatment, and challenges for future research. J Bone Miner Res 2011; 26:2317-37. [PMID: 21812031 PMCID: PMC3405491 DOI: 10.1002/jbmr.483] [Citation(s) in RCA: 319] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Recent advances in understanding the epidemiology, genetics, diagnosis, clinical presentations, skeletal involvement, and therapeutic approaches to hypoparathyroidism led to the First International Workshop on Hypoparathyroidism that was held in 2009. At this conference, a group of experts convened to discuss these issues with a view towards a future research agenda for this disease. This review, which focuses primarily on hypoparathyroidism in the adult, provides a comprehensive summary of the latest information on this disease.
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Affiliation(s)
- John P Bilezikian
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.
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41
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Rubin MR, Bilezikian JP. Hypoparathyroidism: clinical features, skeletal microstructure and parathyroid hormone replacement. ACTA ACUST UNITED AC 2011; 54:220-6. [PMID: 20485912 DOI: 10.1590/s0004-27302010000200019] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Accepted: 02/08/2010] [Indexed: 11/21/2022]
Abstract
OBJECTIVE Hypoparathyroidism is a disorder in which parathyroid hormone is deficient in the circulation due most often to immunological destruction of the parathyroids or to their surgical removal. The objective of this work was to define the abnormalities in skeletal microstructure as well as to establish the potential efficacy of PTH(1-84) replacement in this disorder. SUBJECTS AND METHODS Standard histomorphometric and microCT analyses were performed on iliac crest bone biopsies obtained from patients with hypoparathyroidism. Participants were treated with PTH(1-84) for two years. RESULTS Bone density was increased and skeletal features reflected the low turnover state with greater BV/TV, Tb. Wi and Ct. Wi as well as suppressed MS and BFR/BS as compared to controls. With PTH(1-84), bone turnover and bone mineral density increased in the lumbar spine. Requirements for calcium and vitamin D fell while serum and urinary calcium concentrations did not change. CONCLUSION Abnormal microstructure of the skeleton in hypoparathyroidism reflects the absence of PTH. Replacement therapy with PTH has the potential to correct these abnormalities as well as to reduce the requirements for calcium and vitamin D.
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Affiliation(s)
- Mishaela R Rubin
- Departamento de Medicina, Columbia University, Nova York, Estados Unidos
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42
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Adriaansen J, Perez P, Zheng C, Collins MT, Baum BJ. Human parathyroid hormone is secreted primarily into the bloodstream after rat parotid gland gene transfer. Hum Gene Ther 2011; 22:84-92. [PMID: 20977345 DOI: 10.1089/hum.2010.097] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Hypoparathyroidism is a hormone deficiency syndrome that leads to low blood calcium levels and for which current replacement therapy is inadequate. Gene transfer to salivary glands leads to safe and abundant secretion of therapeutic protein into either saliva or the bloodstream. We previously reported the successful transduction of rat submandibular glands with an adenoviral vector encoding human parathyroid hormone (Ad.hPTH), but unfortunately most of the hPTH was secreted into saliva. Because submandibular and parotid glands are morphologically and functionally different, we hypothesized that hPTH sorting might be different in parotid glands. After 2 days, the pattern of hPTH secretion from transduced parotid glands of intact rats was reversed from that of transduced submandibular glands, that is, most transgenic hPTH was detected in serum (5 × 10(10) viral particles per gland; the saliva-to-serum ratio of total hPTH secreted was 0.04). Vector copies were localized to the targeted parotid glands, with none detected in liver or spleen. Ad.hPTH next was administered to parotid glands of parathyroidectomized rats. Two days after delivery no hPTH was detectable in saliva, but high levels were found in serum, leading to normalization of serum calcium and a significant increase in the urinary phosphorus-to-creatinine ratio. This study demonstrates for the first time differential sorting of transgenic hPTH between submandibular and parotid glands, suggesting that hPTH may be a valuable model protein for understanding the molecular basis of transgenic secretory protein sorting in these exocrine glands. We also show the clinical potential of salivary gland hPTH gene therapy for patients with hypoparathyroidism.
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Affiliation(s)
- J Adriaansen
- Gene Transfer Section, Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892-1190, USA
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Rubin MR, Sliney J, McMahon DJ, Silverberg SJ, Bilezikian JP. Therapy of hypoparathyroidism with intact parathyroid hormone. Osteoporos Int 2010; 21:1927-34. [PMID: 20094706 PMCID: PMC2947814 DOI: 10.1007/s00198-009-1149-x] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2009] [Accepted: 11/02/2009] [Indexed: 11/30/2022]
Abstract
UNLABELLED Hypoparathyroidism, a disorder characterized by low parathyroid hormone (PTH), is generally treated with oral calcium and vitamin D supplementation. We investigated the effects of PTH(1-84) treatment in 30 hypoparathyroid subjects for 24 months. PTH(1-84) treatment in hypoparathyroidism significantly reduced supplemental calcium and 1,25-dihydroxyvitamin D requirements without generally altering serum and urinary calcium levels. INTRODUCTION Hypoparathyroidism, a disorder characterized by low PTH, is associated with hypocalcemia, hypercalciuria, and increased bone mineral density (BMD). Conventional therapy with calcium and 1,25-dihydroxyvitamin D can maintain the serum calcium concentration, but doses are high, and control is variable. We investigated the effects of human PTH(1-84) treatment in hypoparathyroidism. METHODS Thirty subjects with hypoparathyroidism were treated in an open-label study of PTH(1-84) 100 µg every other day by subcutaneous injection for 24 months, with monitoring of calcium and vitamin D supplementation requirements, serum and 24 h urinary calcium excretion, and BMD by dual energy X-ray absorptiometry. RESULTS Requirements for supplemental calcium decreased significantly (3,030±2,325 to 1,661±1,267 mg/day (mean±SD); p<0.05), as did requirements for supplemental 1,25-dihydroxyvitamin D (0.68±0.5 to 0.40±0.5 µg/day; p<0.05). Serum calcium levels and 24 h urinary calcium excretion were mostly unchanged at 24 months. BMD increased at the lumbar spine by 2.9±4% from baseline (p<0.05), while femoral neck BMD remained unchanged and distal one third radial BMD decreased by 2.4±4% (p<0.05). CONCLUSION PTH(1-84) treatment in hypoparathyroidism significantly reduces supplemental calcium and 1,25-dihydroxyvitamin D requirements without generally altering serum and urinary calcium levels.
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Affiliation(s)
- M R Rubin
- Department of Medicine, Division of Endocrinology, Metabolic Bone Diseases Unit, College of Physicians and Surgeons, Columbia University, 630 W. 168th St., New York, NY 10032, USA.
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Winer KK, Sinaii N, Reynolds J, Peterson D, Dowdy K, Cutler GB. Long-term treatment of 12 children with chronic hypoparathyroidism: a randomized trial comparing synthetic human parathyroid hormone 1-34 versus calcitriol and calcium. J Clin Endocrinol Metab 2010; 95:2680-8. [PMID: 20392870 PMCID: PMC2902068 DOI: 10.1210/jc.2009-2464] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
CONTEXT Hypoparathyroidism is among the few hormonal insufficiency states not treated with replacement of the missing hormone. This is the first randomized controlled study in children comparing treatment with synthetic human PTH 1-34 and calcitriol. OBJECTIVE The primary objective was to assess the efficacy and safety of long-term PTH 1-34 vs. calcitriol treatment in the maintenance of normal serum calcium values and renal calcium excretion in children with hypoparathyroidism. SETTING The study was conducted at a clinical research center. SUBJECTS Subjects included 12 children aged 5-14 yr with chronic hypoparathyroidism and without severe renal or hepatic insufficiency. STUDY DESIGN The study was a 3-yr randomized parallel trial comparing twice-daily calcitriol (plus calcium and cholecalciferol in four daily doses) vs. s.c. PTH 1-34 treatment, with weekly or biweekly monitoring of serum and urine calcium. RESULTS Mean predose serum calcium levels were maintained at, or just below, the normal range, and urine calcium levels remained in the normal range throughout the 3-yr study, with no significant differences between treatment groups. Creatinine clearance, corrected for body surface area, did not differ between groups and remained normal throughout the study. Markers of bone turnover were mildly elevated during PTH 1-34 therapy and remained within the normal range during calcitriol therapy. Mean bone mineral density Z-scores at the anterior-posterior lumbar spine, femoral neck, distal radius, and whole body remained within the normal range and did not differ between groups throughout the study. Similarly, height and weight percentiles did not differ between treatment groups and remained normal throughout the 3-yr follow-up. CONCLUSION We conclude that PTH 1-34 therapy is safe and effective in maintaining stable calcium homeostasis in children with hypoparathyroidism. Additionally, PTH 1-34 treatment allowed normal skeletal development because there were no differences in bone mineral accrual, linear growth, or weight gain between the two treatment arms over the 3-yr study period.
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Affiliation(s)
- Karen K Winer
- The Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892-7510, USA.
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PTH(1-34) replacement therapy in a child with hypoparathyroidism caused by a sporadic calcium receptor mutation. J Bone Miner Res 2009; 24:964-73. [PMID: 19063686 PMCID: PMC2672210 DOI: 10.1359/jbmr.081233] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Autosomal dominant hypocalcemia (ADH) is an inherited form of hypoparathyroidism caused by activating mutations in the calcium-sensing receptor (CaR). Treatment with PTH(1-34) may be superior to conventional therapy but is contraindicated in children, and long-term effects on the skeleton are unknown. The patient is a 20-yr-old female with ADH treated with PTH continuously since 6 yr and 2 mo of age. A bone biopsy was obtained for histomorphometry and quantitative backscattered electron imaging (qBEI). Her data were compared with one age-, sex-, and length of hypoparathyroidism-matched control not on PTH and two sex-matched ADH controls before and after 1 yr of PTH. The patient's growth was normal. Hypercalciuria and hypermagnesuria persisted despite normal or subnormal serum calcium and magnesium levels. Nephrocalcinosis, without evidence of impaired renal function, developed by 19 yr of age. Cancellous bone volume was dramatically elevated in the patient and in ADH controls after 1 yr of PTH. BMD distribution (BMDD) by qBEI of the patient and ADH controls was strikingly shifted toward lower mineralization compared with the non-ADH control. Moreover, the ADH controls exhibited a further reduction in mineralization after 1 yr of PTH. These findings imply a role for CaR in bone matrix mineralization. There were no fractures or osteosarcoma. In conclusion, long-term PTH replacement in a child with ADH was not unsafe, increased bone mass without negatively impacting mineralization, and improved serum mineral control but did not prevent nephrocalcinosis. Additionally, this may be the first evidence of a role for CaR in human bone.
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Adriaansen J, Perez P, Goldsmith CM, Zheng C, Baum BJ. Differential sorting of human parathyroid hormone after transduction of mouse and rat salivary glands. Hum Gene Ther 2009; 19:1021-8. [PMID: 18694295 DOI: 10.1089/hum.2008.079] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Gene transfer to salivary glands leads to abundant secretion of transgenic protein into either saliva or the bloodstream. This indicates significant clinical potential, depending on the route of sorting. The aim of this study was to probe the sorting characteristics of human parathyroid hormone (hPTH) in two animal models for salivary gland gene transfer. PTH is a key hormone regulating calcium levels in the blood. A recombinant serotype 5 adenoviral vector carrying the hPTH cDNA was administered to the submandibular glands of mice and rats. Two days after delivery, high levels of hPTH were found in the serum of mice, leading to elevated serum calcium levels. Only low amounts of hPTH were found in the saliva. Two days after vector infusion into rats, a massive secretion of hPTH was measured in saliva, with little secretion into serum. Confocal microscopy showed hPTH in the glands, localized basolaterally in mice and apically in rats. Submandibular gland transduction was effective and the produced hPTH was biologically active in vivo. Whereas hPTH sorted toward the basolateral side in mice, in rats hPTH was secreted mainly at the apical side. These results indicate that the interaction between hPTH and the cell sorting machinery is different between mouse and rat salivary glands. Detailed studies in these two species should result in a better understanding of cellular control of transgenic secretory protein sorting in this tissue.
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Affiliation(s)
- J Adriaansen
- Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892-1190, USA.
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Winer KK, Sinaii N, Peterson D, Sainz B, Cutler GB. Effects of once versus twice-daily parathyroid hormone 1-34 therapy in children with hypoparathyroidism. J Clin Endocrinol Metab 2008; 93:3389-95. [PMID: 18492754 PMCID: PMC2567852 DOI: 10.1210/jc.2007-2552] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Hypoparathyroidism is among the few hormonal insufficiency states not treated with replacement of the missing hormone. Long-term conventional therapy with vitamin D and analogs may lead to nephrocalcinosis and renal insufficiency. OBJECTIVE Our objective was to compare the response of once-daily vs. twice-daily PTH 1-34 treatment in children with hypoparathyroidism. SETTING The study was conducted at a clinical research center. SUBJECTS Fourteen children ages 4-17 yr with chronic hypoparathyroidism were studied. STUDY DESIGN This was a randomized cross-over trial, lasting 28 wk, which compared two dose regimens, once-daily vs. twice-daily PTH1-34. Each 14-wk study arm was divided into a 2-wk inpatient dose-adjustment phase and a 12-wk outpatient phase. RESULTS Mean predose serum calcium was maintained at levels just below the normal range. Repeated serum measures over a 24-h period showed that twice-daily PTH 1-34 increased serum calcium and magnesium levels more effectively than a once-daily dose. This was especially evident during the second half of the day (12-24 h). PTH 1-34 normalized mean 24-h urine calcium excretion on both treatment schedules. This was achieved with half the PTH 1-34 dose during the twice-daily regimen compared with the once-daily regimen (twice-daily, 25 +/-15 microg/d vs. once-daily, 58 +/- 28 microg/d; P < 0.001). CONCLUSIONS We conclude that a twice-daily PTH 1-34 regimen provides a more effective treatment of hypoparathyroidism compared with once-daily treatment because it reduces the variation in serum calcium levels and accomplishes this at a lower total daily PTH 1-34 dose. The results showed, as in the previous study of adult patients with hypoparathyroidism, that a twice-daily regimen produced significantly improved metabolic control compared with once-daily PTH 1-34.
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Affiliation(s)
- Karen K Winer
- National Institute of Child Health and Human Development, National Institutes of Health, Building 6100, Room 4B11, Bethesda, Maryland 20892-7510, USA.
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Hypercalcaemic and hypocalcaemic conditions due to calcium-sensing receptor mutations. Best Pract Res Clin Rheumatol 2008; 22:129-48. [PMID: 18328986 DOI: 10.1016/j.berh.2007.11.006] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The extracellular calcium (Ca2+o)-sensing receptor (CaSR) enables the parathyroid glands and other CaSR-expressing cells involved in calcium homeostasis, such as the kidney and bone, to sense alterations in the level of Ca2+o and to respond with changes in function that are directed at normalizing the blood calcium concentration. Several disorders of Ca2+o sensing arise from inherited or acquired abnormalities that 'reset' the serum calcium concentration upwards or downwards. Heterozygous inactivating mutations of the CaSR produce a benign form of hypercalcaemia, termed 'familial hypocalciuric hypercalcaemia', while homozygous mutations produce a much more severe hypercalcaemic disorder resulting from marked hyperparathyroidism, called 'neonatal severe hyperparathyroidism'. Activating mutations cause a hypocalcaemic syndrome of varying severity, termed 'autosomal-dominant hypocalcaemia or hypoparathyroidism' as well as Bartter's syndrome type V. Calcimimetic CaSR activators and calcilytic CaSR antagonists have also been developed with potential for use in the treatment of these disorders.
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