ESPE Abstracts

Background: Mutations in HESX1, SOX3 responsible for combined pituitary hormone deficiency (CPHD) have been identified in a small number of hypogonadotropic hypogonadism (HH), suggesting that the genetic overlap between CPHD and HH.Case presentation: A 2-month-old boy was referred because of micropenis (stretched penile length 1.0 cm) with intrascrotal testes (1 ml). Hormone assays revealed very-low plasma testosterone levels (0.06 ng/m...

Background: Biochemically monitoring 21-hydroxylase deficiency (21OHD) treatment is challenging. Serum/blood 17-hydroxyprogesterone (17OHP) measurements, especially in the early morning before medication, are traditionally used for this purpose. Urinary pregnanetriol (PT), a urinary metabolite of 17OHP, may also be used. Based on auxological data, we previously reported that the first morning PT value in the range of 2.2–3.3 mg/gCr is optimal for monitori...

Introduction: Denosumab is an inhibitor of receptor activator of nuclear factor kappa-B ligand that strongly suppresses differentiation and function of osteoclasts. Cherubism is a rare autosomal dominant disorder characterized by symmetrical swelling of the mandible and the maxilla. In patients with cherubism, the bone is replaced by a fibrous granuloma containing multinucleated giant cells, which are differentiated into activated osteoclasts<p class="abst...

Background: The type I IGF1R plays a role in intrauterine and postnatal growth. Heterozygous IGF1R mutations have been identified in over 20 families. Some of them are linked to the etiology of short stature in previous studies. In addition, we previously reported that a heterozygous nonsense mutation (p.Q1250X) of the IGF1R gene led to decrease IGF1R protein expression through endoplasmic reticulum-associated protein degradation (ERAD) mechanism, resulted in...

Loss of methylation (LOM) at GNAS-A/B:TSS-differentially methylated regions (DMRs) in the GNAS locus is observed in pseudohypoparathyroidism type 1B (PHP1B). Many PHP1B cases are sporadic, but autosomal dominant-PHP1B has a deletion involving NESP55 expressed from the maternal allele or STX16 located upstream of the GNAS locus on the maternal allele. We report the possible first familial PHP1B cases with retrotransposon insertion in the GNAS locus on the maternal allele. To ou...

Background and Objective: Congenital hypothyroidism (CH) is mostly detected with neonatal newborn screening (NBS). CH is the most common neonatal endocrine disorder with an incidence of 1:2,000-1:4,000. However the molecular etiology is sill poorly understood, considering pathogenic variations in candidate genes have been found only in 10-20 % of CH. We performed mutations screening of causative genes through a systematic Next Generation Sequencing (NGS) a...

Background: The congenital disorders of glycosylation (CDG) are a group of genetic diseases owed to defects in the biosynthesis of glycoproteins and other glycoconjugates. Phosphoglucomutase type 1(PGM1) deficiency is classified among the CDG. Varied range of clinical manifestations recently described includes hepatopathy, bifid uvula, malignant hyperthermia, hypogonadotropic hypogonadism, growth retardation, hypoglycaemia, myopathy, dilated cardiomyopathy, and cardiac arrest,...

Background: Nephrogenic diabetes insipidus (NDI) is a disorder characterized by renal resistance to the antidiuretic effect of AVP. Affected patients are exhibiting symptoms as polyuria and polydipsia. Approximately 90% of congenital NDI are inherited in an X-linked recessive manner and caused by mutations of arginine vasopressin type 2 receptor (AVPR2) gene.Objective and hypotheses: An 8-year-old Japanese boy was referred to our hospital for nocturnal e...

Introduction: Hysterosalpingography using oil-soluble iodinated contrast medium (ethiodized oil; Lipiodol) is a common examination for patients with infertility. Lipiodol remains in the body long after the examination, and there are some reports suggesting that Lipiodol induces thyroid dysfunction not only to the mother but also the fetus and the newborn. However, since there are no known mouse models of Lipiodol-induced thyroid dysfunction, we examined the influence of Lipiod...

Introduction: The Sonic hedgehog (SHH) signaling pathway plays a crucial role in development of the forebrain and pituitary. Mutations in SHH signaling related genes are well known to be the cause of Holoprosencephaly (HPE), which results from developmental field defect or impaired midline cleavage of the embryonic forebrain, and is frequently associated with hypopituitarism. This study aimed to define the prevalence of congenital hypopituitarism (CH) in terms...