hrp0089ss1.1 | Special Symposia: Nutrition and Growth | ESPE2018

It is not Just the Growth Hormone-IGF-I Axis

Nilsson Ola

For decades, the dominant conceptual framework for understanding short and tall stature was centered on the GH-IGF-I axis. However, recent findings in basic molecular and cellular biology and in clinical genetics have uncovered a vast array of other regulatory systems that control skeletal growth and an accompanying vast array of genetic defects outside the GH-IGF-I axis that can cause disorders of linear growth. As a result, the traditional view of short or tall stature that ...

hrp0089con2.1 | To prime or not to prime? | ESPE2018

PRO - To Prime or Not to Prime?

Nilsson Ola

Recent progress in the understanding of growth disorders has further emphasized that growth hormone deficiency is only one of many causes for growth failure and that growth hormone deficiency (GHD) is over-diagnosed in children with short stature. Over-diagnosis of GHD is problematic as it incorrectly labels children with pituitary disease, leads to overtreatment and misinformation of patients and families, and may sometimes prevent doctors from making the correct diagnosis. M...

hrp0094p1-55 | Bone B | ESPE2021

Premature epiphyseal fusion induced by a retinoic acid agonist in a young girl with fibrodysplasia ossificans progressiva

Hallgrimsdottir Sigrun , Nilsson Ola ,

Retinoic acid receptor agonists can have dramatic negative effects on growth and even induce premature growth cessation and epiphyseal fusion (1, 2). An 11 5/12-year-old, prepubertal girl with fibrodysplasia ossificans progressiva presented in our pediatric skeletal disorders clinic with the concern of early growth cessation. She had participated in a clinical trial of Palovarotene (“MOVE”, NCT03312634), a retinoic acid receptor-gamma agonist, since the age of 9 10/1...

hrp0094p2-71 | Bone, growth plate and mineral metabolism | ESPE2021

Premature epiphyseal fusion induced by Palovarotene in a young girl with fibrodysplasia ossificans progressiva

Hallgrimsdottir Sigrun , Nilsson Ola ,

Retinoic acid receptor agonists can have dramatic negative effects on growth and even induce premature growth cessation and epiphyseal fusion (1, 2). An 11 5/12-year-old, prepubertal girl with fibrodysplasia ossificans progressiva presented in our pediatric skeletal disorders clinic with the concern of early growth cessation. She had participated in a clinical trial of Palovarotene (“MOVE”, NCT03312634), a retinoic acid receptor-gamma agonist, since the age of 9 10/1...

hrp0086fc2.4 | Bone & Mineral Metabolism | ESPE2016

In vitro Evidence that Growth Plate Chondrocytes Differentiate into Perichondrial Cells

Spath Stephan-Stanislaw , Andrade Anenisia , Chau Michael , Nilsson Ola

Background: During early bone formation, mesenchymal stem-cells condense and differentiate into collagen type 2-expressing chondrocytes which form the cartilaginous bone anlagen. This anlage becomes enclosed by the perichondrium. The perichondrium consists of two layers, the inner cambium layer containing chondrocyte- and osteo-precursor cells and the outer fibrous layer important for mechanical and structural support. While the regulation of the growth plate is increasingly w...

hrp0094yb1.5 | Year of Paediatric Endocrinology 1 | ESPE2021

Bone, Growth Plate and Mineral Metabolism

Baroncelli Marta , Raimann Adalbert , Padidela Raja , Nilsson Ola ,

The skeletal research field develops rapidly and has produced several exciting findings in the last year and includes advances in the treatment of rare skeletal disorders and an ever deeper understanding into the fundamental molecular mechanisms that control skeletal development, metabolism, growth, and mineralization. The targeting of the C-type natriuretic peptide (CNP) pathway and options to directly antagonize the overactivity of the FGFR3 pathway in achondroplasia continu...

hrp0095p1-308 | Growth and Syndromes | ESPE2022

Postnatal growth failure of aggrecan deficient mice is due to impaired growth plate chondrogenesis

Bendre Ameya , Ottosson Lars , Baroncelli Marta , Dou Zelong , Nilsson Ola

Background: Heterozygous Aggrecan (Acan) mutations cause autosomal short stature (ISS) with advanced bone age, early-onset osteoarthritis and intervertebral disc disease (OMIM#165800) in humans. Cartilage matrix deficiency mouse (Acancmd) has a naturally occurring 7 bp micro-deletion in aggrecan gene. Heterozygous Acancmd mice develop postnatal dwarfism with progressing age. However, the underlying cellular and molecular mechanisms causin...

hrp0089p1-p173 | Growth & Syndromes P1 | ESPE2018

Clinical and Radiological Manifestations in a Large Swedish Family with a Pathogenic Heterozygous ACAN Variant

Gkourogianni Alexandra , Segerlund Emma , Hallgrimsdottir Sigrun , Nilsson Ola , Stattin Eva-Lena

Objectives: Heterozygous mutations in the aggrecan gene (ACAN) are associated with idiopathic short stature, with or without advanced bone age (BA), osteochondritis dissecans (OCD) and early onset of severe osteoarthritis (OA). Variable features also include midface hypoplasia, brachydactyly, short thumbs and intervertebral disc degenerative disease.Methods: We reviewed 173 radiographs in 22 individuals (8F:14M), (three shoulders, 10 hands, 10 w...

hrp0084p2-462 | Growth | ESPE2015

Advanced Bone Age and Accelerated Dental Development Associated with Elevated Retinoic Acid Levels and Haploinsufficiency of CYP26A1 and CYP26C1

Nilsson Ola , Isoherranen Nina , Guttmann-Bauman Ines , Jee YouHee , Guo Michael , Lui Julian , Dauber Andrew

Background: Nutritional excess of vitamin A, a precursor for retinoic acid (RA), causes premature epiphyseal fusion, craniosynostosis, as well as light-dependent retinopathy. Similarly, homozygous loss-of-function mutations in one of the major RA-metabolizing enzymes CYP26B1 causes advanced bone age, premature epiphyseal fusion, and craniosynostosis. We studied a patient with markedly accelerated skeletal and dental development, retinal scarring, and autism-spectrum disease.</...

hrp0082fc4.4 | Growth | ESPE2014

Short Stature, Accelerated Bone Maturation, and Early Growth Cessation due to Heterozygous Aggrecan Mutations

Nilsson Ola , Guo Michael , Dunbar Nancy , Popovic Jadranka , Flynn Daniel , Jacobsen Christina , Lui Julian , Hirschhorn Joel , Baron Jeffrey , Dauber Andrew

Background: Most children with idiopathic short stature (ISS) have a delayed bone age (BA). ISS with advanced BA is far less common. We studied three families with autosomal dominant short stature, unexplained BA acceleration, and premature growth cessation.Objective and hypotheses: To identify the genetic cause of this condition and describe its clinical spectrum.Method: Whole exome sequencing was performed in selected individuals...