ESPE Abstracts

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...

Introduction: The Newborn Screening Programme (NBS) enables earlier diagnosis of congenital hypothyroidism (CH). However, cases of central congenital hypothyroidism (CCH) are missed in countries which use thyroid stimulating hormone (TSH) based screening strategy. Understanding the pathogenic aetiology of CCH is particularly important because many patients have additional pituitary hormone deficiencies. New genes have been implicated in CCH, including the rece...

Introduction: IMAGE Syndrome (#614732) is an autosomal dominant inherited syndrome as a result of CDKN1C mutation characterized by the association of intrauterine growth retardation, metaphyseal dysplasia, adrenal hypoplasia congenita, and genital anomalies. Here, long-term follow-up of a case with clinical IMAGE syndrome, no genetic mutation was detected, will be presented.Case: A three-month-old baby boy was brought wi...

Obesity—defined as excess fat mass which impacts on physical health—is a complex and multifactorial disease where numerous environmental factors (overeating and/or reduced physical activity) act in concert with genetic factors. Understanding molecular mechanisms of obesity has rapidly improved in recent years due to the development of faster, more specific genetic screening tools (1). Rare genetic obesities are distinguished from more-common polygenic obesities where...

Objectives: We describe 5 pedigrees with a novel phenotype including GHD associated with primary ovarian insufficiency (POI) and investigate the underlying molecular basis.Patients and Methods: 6 Turkish patients (5F, 1M) born to 5 consanguineous pedigrees with severe GHD were identified. All females had POI; the male had normal puberty. All had severe postnatal growth retardation (height -4.4 to -8.9 SDS at presentation...

Background: Central diabetes insipidus (CDI) in the neonatal age is usually a result of intracranial insult, either congenital or acquired. Familial CDI is usually an autosomal dominant disorder, presenting later in childhood (1-6 y) with polyuria and mostly caused by mutations in the Neurophysin II moiety of the AVP-NPII prohormone gene; these interfere with prohormone processing leading to gradual destruction of AVP secreting cells and result in arginine vas...

Aims: Although rare, craniopharyngiomas are the commonest suprasellar tumour in childhood. Despite high overall survival, children and young people <19 years with craniopharyngiomas are at risk of multiple relapses and long-term tumour- and treatment-related neuroendocrine, cognitive and visual morbidity. A recent international survey highlighted the considerable variation in management strategies employed for these tumours, and the lack of any evidence- a...

The use of recombinant adeno-associated viruses (rAAV) as safe vectors have allowed hundreds of gene therapy attempts to treat monogenic diseases not including bone genetic diseases (Gao G, Nat Rev Drug Dis 2019). To our knowledge, there has been few attempts to apply gene therapy to monogenic bone diseases, largely because most skeletal malformations are being developed during fetal life. Patients affected with acrodysostosis are known to aggravate their skeletal malformation...

Introduction: Osteopetrosis (OP) is a rare genetic disorder that is characterized by abnormal osteoclast function resulting in dense bones and marrow failure. The only definitive cure for OP is stem cell transplantation (SCT). Hypercalcemia is a well described complication in children with OP undergoing SCT. This study describes the calcium profile and treatment modalities used to maintain normocalcemia in children with OP undergoing SCT.<p class="abstext"...

SHOX haploinsufficiency (SHOX-D) is a genetic cause of disharmonic short stature. However, the different impact on phenotype can show differences between patients with the same genotype.GH ameliorates final height, with significant differences between patients for the putative role of environmental factors who can influence growth.We describe the case of two sisters with SHOX-D (target height: 146.8 cm (-2.6SDS); mother: 146.5 cm; ...