hrp0089p1-p038 | Bone, Growth Plate & Mineral Metabolism P1 | ESPE2018

Disease Burden and Systemic Manifestations of HPP in Children Enrolled in the Global HPP Registry

Hogler Wolfgang , Langman Craig , Gomes Da Silva Hugo , Fang Shona , Linglart Agnes , Ozono Keiichi , Petryk Anna , Rockman-Greenberg Cheryl , Seefried Lothar , Kishnani Priya

Hypophosphatasia (HPP) is a rare, inherited, systemic disease caused by mutation(s) of the ALPL gene encoding tissue-nonspecific alkaline phosphatase (ALP), resulting in deficient ALP activity. Asfotase alfa is an enzyme replacement therapy approved for treatment of patients with pediatric-onset HPP. The global HPP Registry is an observational, prospective, multinational study (NCT02306720; EUPAS13514) established to collect real world clinical data from patients of a...

hrp0084p3-655 | Bone | ESPE2015

A Longitudinal, Prospective, Long-Term Registry of Patients with Hypophosphatasia

Linglart Agnes , Hogler Wolfgang , Langman Craig , Mornet Etienne , Ozono Keiichi , Rockman-Greenberg Cheryl , Seefried Lothar , Bedrosian Camille , Fujita Kenji P , Cole Alex , Kishnani Priya

Background: Hypophosphatasia (HPP) is a rare, inherited metabolic disease characterised by bone mineralisation defects and osteomalacia, and systemic manifestations, including seizures, respiratory insufficiency, muscle weakness, nephrocalcinosis, and pain. The biochemical hallmark of HPP is low serum alkaline phosphatase activity, resulting from loss-of-function mutations in the gene encoding tissue non-specific alkaline phosphatase. HPP presents a broad spectrum of disease s...

hrp0094p1-12 | Bone A | ESPE2021

Real-world clinical profiles of children with hypophosphatasia (HPP) from the Global HPP Registry

Martos-Moreno Gabriel , Linglart Agnes , Petryk Anna , Kishnani Priya , Rockman-Greenberg Cheryl , Dahir Kathryn , Seefried Lothar , Fang Shona , Ozono Keiichi , Hogler Wolfgang ,

Hypophosphatasia (HPP) is a rare, inherited metabolic disease caused by deficient activity of tissue non-specific alkaline phosphatase (TNSALP). In children, HPP has a heterogeneous clinical presentation, frequently with nonspecific musculoskeletal and systemic manifestations, often leading to misdiagnoses and substantial delays in diagnosis. Data from 323 children with confirmed HPP diagnosis (aged <18 years, ALP activity below the reference range and/or ALPL mut...

hrp0094p2-332 | Growth and syndromes (to include Turner syndrome) | ESPE2021

Evaluating Safety, Efficacy, and Pharmacokinetics of Weekly TransCon CNP in Children with Achondroplasia: Design of the ACcomplisH Trial

McDonnell Ciara , Irving Melita , Zarate Yuri , B. Hove Hanne , Hogler Wolfgang , Hoernschemeyer Daniel , Zhang Ying , Viuff Dorthe , Hartoft-Nielsen Marie-Louise , Beckert Michael , Savarirayan Ravi ,

Achondroplasia (ACH) is the most common form of dwarfism, occurring in 1: 20,000 births. ACH is caused by gain-of-function mutations in the fibroblast growth factor receptor 3 (FGFR3) gene that interfere with endochondral ossification. Clinically significant morbidities are frequent in ACH; however, there are currently no approved therapies that target the underlying pathobiology. C-type natriuretic peptide (CNP) is an attractive target as it has the potential to inhi...

hrp0086fc2.6 | Bone &amp; Mineral Metabolism | ESPE2016

Effect of KRN23, a Fully Human Anti-FGF23 Monoclonal Antibody, on Rickets in Children with X-linked Hypophosphatemia (XLH): 40-week Interim Results from a Randomized, Open-label Phase 2 Study

Linglart Agnes , Carpenter Thomas , Imel Erik , Boot Annemieke , Hogler Wolfgang , Padidela Raja , van't Hoff William , Whyte Michael , Chen Chao-Yin , Skrinar Alison , Agarwal Sunil , Martin Javier San , Portale Anthony

Background: In XLH, high circulating FGF23 causes hypophosphatemia, rickets, and short stature.Objective and hypotheses: To evaluate KRN23 effects on serum phosphate (Pi) level and rickets severity in XLH children in a Phase 2 study.Method: 52 XLH children (ages 5–12 years, ≤Tanner 2) received KRN23 subcutaneously biweekly (Q2W) or monthly (Q4W). Serum Pi was measured at 2-week intervals. KRN23 dose was titrated (maximum...

hrp0094p2-98 | Bone, growth plate and mineral metabolism | ESPE2021

BUR-CL207: An Open-label, Multicenter, Non-randomized Study to Assess the Safety, Tolerability, Pharmacokinetics and Efficacy of Burosumab in Pediatric Patients from Birth to Less than 1 Year of Age with XLH.

Padidela Raja , Cheung Moira , Allgrove Jeremy , Bacchetta Justine , Semler Oliver , Heubner Angela , Schnabel Dirk , Emma Franceso , Nilsson Ola , Hogler Wolfgang , De La Cerda Ojeda Francisco , Quattrocchi Emilia , Linglart Agnes ,

Background: X-linked hypophosphatemia (XLH) is caused by mutations in PHEX which increases serum Fibroblast Growth Factor 23 (FGF23) concentrations leading to phosphate wasting and osteomalacia. Burosumab is a recombinant fully human IgG1 monoclonal antibody which selectively inhibits the activity of FGF23. In clinical trials burosumab demonstrated significant clinical improvements in radiological rickets severity, growth, and biochemistry among XLH c...

hrp0086p1-p115 | Bone &amp; Mineral Metabolism P1 | ESPE2016

A European Survey to Identify New Roads for Care, Training and Research Around Rare Metabolic Bone Diseases

Fernandez Isabelle , Ahmed Syed Faisal , Bishop Nick , Brandi Maria Luisa , Doulgeraki Artemis , Haeusler Gabriele , Hogler Wolfgang , Kostik Mikhail , Makitie Outi , Moreno Gabriel Martos , Nilsson Ola , Schnabel Dirk , Šumnik Zdenek , Tillmann Vallo , Turan Serap , Zillikens Carola , Linglart Agnes , on behalf of the European Metabolic Bone Network

Background: Rare metabolic bone diseases (RMBD) are at the crossways of Endocrinology, Nephrology, Orthopaedic surgery and Rheumatology. Most of RMBD lead to short stature, bone pain, tooth anomalies, leg deformities, bone fragility and disability of variable importance. The organization of care varies immensely amongst European countries. Several European networks dedicated to RMBD already exist, supported by societies such as ESPE, ECTS or research grants, albeit their focus...

hrp0082p1-d2-40 | Bone | ESPE2014

Effects and Limitations of Cinacalcet Therapy in Neonatal Severe Hyperparathyroidism

Doehnert Ulla , Goepel Wolfgang , Hoeppner Wolfgang , Hiort Olaf

Background: Neonatal severe hyperparathyroidism (NSHPT) has been associated with inactivating mutations of the calcium-sensing receptor (CASR) gene. Impaired inhibition of PTH secretion by extracellular ionized calcium and decreased urinary excretion of calcium leads to severe hypercalcemia in the first days of life. Calcium responsiveness of the CaSR is amplified by type 2 calcimimetic agents like cinacalcet, which has been able to normalize PTH and calcium levels in cases of...

hrp0095fc2.4 | Bone, Growth Plate and Mineral Metabolism | ESPE2022

Patient-reported outcomes from a randomized open-label phase 3 trial comparing burosumab vs conventional therapy in children with X-linked hypophosphatemia: results from the 24-week treatment extension period

Padidela Raja , Whyte Michael P , Glorieux Francis H , Munns Craig F , Ward Leanne M , Nilsson Ola , Portale Anthony A , Simmons Jill H , Namba Noriyuki , Cheong Hae Il , Pitukcheewanont Pisit , Sochett Etienne , Högler Wolfgang , Muroya Koji , Tanaka Hiroyuki , Gottesman Gary S , Biggin Andrew , Perwad Farzana , Williams Angela , Nixon Annabel , Sun Wei , Chen Angel , Skrinar Alison , Imel Erik A

In a randomized open-label phase 3 trial in 62 children (1–12 years) with X-linked hypophosphatemia (XLH) (NCT 02915705), switching from conventional therapy (oral phosphate plus active vitamin D) to burosumab, a monoclonal antibody targeting fibroblast growth factor 23, significantly improved serum phosphate concentration, rickets, lower-extremity deformities, growth, mobility, and patient-reported outcomes (PROs) at 64 weeks. Children in Europe, USA, Canada, and Australia wh...

hrp0092t7 | Top 20 Poster | ESPE2019

Establishing of a Novel NGS Tool for the Diagnosis of X-linked Hypophosphatemia (XLH)

Thiele Susanne , Stubbe Anita , Werner Ralf , Hiort Olaf , Hoeppner Wolfgang

X-linked hypophosphatemia (XLH) is the most common genetic disorder of phosphate homeostasis. It is caused by inactivating mutations in the PHEX gene, which encodes a phosphate regulating endopeptidase predominantly expressed in osteoblasts, osteocytes, and odontoblasts.In children there is a broad phenotypic spectrum of XLH ranging from isolated hypophosphatemia without clinical signs up to severe symptoms, such as rickets, extreme lower limb d...