ESPE Abstracts

Background: Isolated Growth Hormone Deficiency (IGHD) is usually associated with a delayed bone age. A genetic cause for IGHD is more frequently found in patients with familial cases and/or consanguineous parents.Objective and hypotheses: To diagnose the genetic cause of IGHD and clarify the unusual clinical presentation of advanced bone age in one patient born to consanguineous parents.Method: Sanger sequencing of GH1, <e...

Background: A virus initially considered benign in this age group, SARS-COV-2 has recently been associated with Pediatric Multisystemic Inflammatory Syndrome (PIMS), temporarily associated with COVID-19, a syndrome whose diagnostic determination has a vital relevance since it imposes unfavorable outcomes. This study aims to describe the sociodemographic characteristics of PIMS in Brazil and the factors associated with death by this syndrome.<p class="abste...

Case Report: Patient 1: a 3.6-yr-old girl presented with very severe hypertriglyceridemia (serum triglyceride level >1000mg/dL) in random sampling in the first year of life. She presented with recurring episodes of abdominal pain, and splenomegaly. There is no history of consanguineous marriage. Maternal and paternal family had history of coronary events at an early age. A genetic panel showed homozygous variant chr8:19.953.365 C>T (p.Ala162Val) in the l...

Background: Self-limited delayed puberty (DP) is an extreme variant of normal pubertal timing and it often clusters in families. Although it is highly heritable and is the most common cause of delayed puberty, little is known about the genetic control. GnRH neuronal biology has been implicated as a key element in the pathogenesis of DP. By focusing on genes involved in GnRH neuron development, migration and function we may understand more about the genetic bas...

Background: The initiation of puberty is orchestrated by the augmentation in the secretion of gonadotropin-releasing hormone (GnRH) from a few thousand neurons located in the hypothalamus. Recent findings identified that the neuroendocrine control of puberty is regulated by a network of transcriptional factors hierarchically organized, but this still remains not fully elucidated. Enhanced At Puberty 1 (EAP1) is one of the main regulators of pubertal onset and it is ex...

Background: Primary ovarian failure (POF) is a major cause of female infertility. POF is characterized by amenorrhea, hypo-estrogenism and elevated gonadotrophin levels. In POF disorder, several genetic alterations have been described, however in most of the patients the etiology of this disorder remains unknown.Objective and hypotheses: To identify new genes implicated in the development of POF using Next-Generation Sequencing (NGS).<p class="abstex...

Background: Aberrations in the timing of puberty may result in significant adverse health outcomes, including cancers, cardiovascular and neurological pathologies. Self-limited delayed puberty (DP) (i.e. constitutional delay of puberty) runs in families with either autosomal dominant or complex inheritance patterns in >70% of families, indicating a strong genetic basis of the trait. However, only a few genes have been identified underlying DP so far....

Congenital adrenal hyperplasia is an autosomal recessive inborn error of metabolism due to impaired activity of one enzyme required for cortisol biosynthesis. Steroid 21-hydroxylase (21OH) deficiency is the cause in more than 90% of the patients. The 21OH is encoded by the CYP21A2 gene located on the chromosome 6 in the region known as the RCCX module. Due to the high homology and tandem-repeat organization of the RCCX module, this region of the genome is subjected to...

Background: Polycystic Ovary Syndrome (PCOS) is characterized by clinical and/or biochemical hyperandrogenism, oligo-anovulation and/or ultrasound finding of polycystic ovaries. Insulin-resistance represents the etiopathogenetic key of PCOS: a deficit of Inositol’s tissue availability seems to be responsible for this clinical picture. Hyperglycemia resulting insulin-resistance, determines a state of chronic inflammation, which increases oxidative stress.<p class="abst...

Background: Osteogenesis imperfecta (OI) is a clinically and genetically heterogeneous rare disorder characterized by variable symptoms including predisposition to fractures. OI has been associated with mutations affecting the synthesis of type I collagen. However, the new technologies have permitted the identification of other responsible genes which are in the collagen metabolic pathway, while others are not.Objective: Characterize the genotype of pati...