Publications by authors named "Naiara C B Dantas"

Introduction: Although the clinical benefits of long-term recombinant human growth hormone (rhGH) therapy have been well demonstrated in children born small for gestational age (SGA), little is known about the outcomes of this therapy in children born with very low birth weight (VLBW). This study aimed to report the short- and long-term response to rhGH therapy in a cohort of VLBW patients, comparing subgroups according to size, gestational age (GA), and causal factors associated with VLBW.

Methods: We describe 33 patients born at VLBW treated with rhGH; 16 also received GnRHa.

View Article and Find Full Text PDF

Introduction: Mutations in the thyroid hormone receptor alpha (THRA) gene are a rare cause of thyroid hormone resistance, which leads to a pleomorphic phenotypic spectrum. Hormonal profiles are variable and subtle, making laboratory diagnoses challenging. Genetic evaluation can be a helpful tool in diagnosing these cases.

View Article and Find Full Text PDF

Objective: Our study aimed to assess the impact of genetic modifiers on the significant variation in phenotype that is observed in individuals with SHOX deficiency, which is the most prevalent monogenic cause of short stature.

Design And Methods: We performed a genetic analysis in 98 individuals from 48 families with SHOX deficiency with a target panel designed to capture the entire SHOX genomic region and 114 other genes that modulate growth and/or SHOX action. We prioritized rare potentially deleterious variants.

View Article and Find Full Text PDF

Introduction: Congenital hypogonadotropic hypogonadism (CHH) is a rare condition caused by GnRH deficiency. More than 40 genes have been associated with the pathogenesis of CHH, but most cases still remain without a molecular diagnosis. Mutations involving the same gene (e.

View Article and Find Full Text PDF
Article Synopsis
  • - The study focused on children with idiopathic short stature (ISS) to see if a multigene analysis could provide a genetic diagnosis, as many remain undiagnosed after extensive evaluations.
  • - Researchers analyzed 102 children with ISS using targeted panel sequencing, finding pathogenic or likely pathogenic genetic variants in 17 children, resulting in a diagnostic yield of 16.7%.
  • - The findings revealed that a multigene sequencing approach can identify genetic causes of short stature, potentially changing the classification of ISS cases and affecting clinical management, especially in those with more severe short stature.
View Article and Find Full Text PDF

Introduction: Isolated SHOX haploinsufficiency is a common monogenic cause of short stature. Few studies compare untreated and rhGH-treated patients up to adult height (AH). Our study highlights a growth pattern from childhood to AH in patients with SHOX haploinsufficiency and analyzes the real-world effectiveness of rhGH alone or plus GnRH analog (GnRHa).

View Article and Find Full Text PDF

Introduction: Pubertal delay is described as one of the clinical features in Noonan syndrome (NS) and it may be one of the factors causing short adult height in those patients. The present study aimed at characterizing pubertal development in NS and identifying pubertal delay predictors.

Methods: We analyzed 133 individuals with a molecular diagnosis of NS and clinical puberty evaluation.

View Article and Find Full Text PDF

Hormone resistances have been described in association with growth disorders, the majority involving the growth hormone (GH)/insulin-like growth factor 1(IGF-1) axis or hormones with specific paracrine-autocrine actions in the growth plate. Defects in hormone receptors or in proteins involved in intracellular signal transduction (post-receptor defects) are the main mechanisms of hormone resistance leading to short stature. The characteristic phenotypes of each of these hormonal resistances are very distinct and bring with them important insights into the role of each hormone and its signaling pathway.

View Article and Find Full Text PDF

Context: Treatment with growth hormone (GH) is considered effective in improving adult height (AH) in Turner syndrome (TS). However, there are few studies comparing AH between treated patients and a concurrent untreated group.

Objective: To assess the efficacy of GH treatment in improving AH in TS and to review previous published studies with treated and untreated groups.

View Article and Find Full Text PDF

Overall, giant prolactinomas are rare tumors (4%), especially those larger than 60 mm (1%). Despite the predominance of macroadenoma documented in multiple endocrine neoplasia type 1 (MEN1)-related prolactinoma, only three giant prolactinoma cases were described so far (size > 40 mm and prolactin > 1,000 ng/mL). None of them was larger than 60 mm or presented hydrocephalus or intracranial hypertension (ICH) as initial manifestation of MEN1.

View Article and Find Full Text PDF