Publications by authors named "Sonir R R Antonini"

Background: Adrenocortical cancer (ACC) is rare and aggressive, with YAP1 overexpression associated with poor outcomes in pediatric patients. In this study, we investigated the mechanisms by which YAP1 drives ACC progression and explored it as a potential target therapy.

Methods: YAP1 expression and methylation in ACC were analyzed from pediatric and adult cohorts.

View Article and Find Full Text PDF

Pediatric adrenocortical tumors (ACTs), rare conditions with uncertain prognoses, have high incidence in southern and southeastern Brazil. Pediatric ACTs are highly heterogeneous, so establishing prognostic markers for these tumors is challenging. We have conducted transcriptomic analysis on 14 pediatric ACT samples and compared cases with favorable and unfavorable clinical outcomes to identify prognostically significant genes.

View Article and Find Full Text PDF

Pediatric adrenocortical tumors (ACT) are rare aggressive neoplasms with heterogeneous prognosis. MicroRNA (miRNA) signatures have been associated with cancer diagnosis, treatment response, and outcomes of several types of cancer. However, the role played by miRNAs in pediatric ACT has been poorly explored.

View Article and Find Full Text PDF

Objective: Mitotane is an important cornerstone in the treatment of pediatric adrenal cortical tumors (pACC), but experience with the drug in the pediatric age group is still limited and current practice is not guided by robust evidence. Therefore, we have compiled international consensus statements from pACC experts on mitotane indications, therapy, and management of adverse effects.

Methods: A Delphi method with 3 rounds of questionnaires within the pACC expert consortium of the international network groups European Network for the Study of Adrenal Tumors pediatric working group (ENSAT-PACT) and International Consortium of pediatric adrenocortical tumors (ICPACT) was used to create 21 final consensus statements.

View Article and Find Full Text PDF

Introduction: Studies addressing the methylation pattern in adamantinomatous craniopharyngioma (ACP) are lacking.

Objective: To identify methylation signatures in ACPs regarding clinical presentation and outcome.

Methods: Clinical and pathology data were collected from 35 patients with ACP (54% male; 18.

View Article and Find Full Text PDF

Context: Nicotinamide nucleotide transhydrogenase (NNT) acts as an antioxidant defense mechanism. NNT mutations cause familial glucocorticoid deficiency (FGD). How impaired oxidative stress disrupts adrenal steroidogenesis remains poorly understood.

View Article and Find Full Text PDF

Pediatric adrenocortical tumor (ACT) is a rare and aggressive neoplasm, with incidence in southern and southeastern Brazil 10-15 times higher than worldwide. Although microRNAs (miRNAs) have been reported to act as tumor suppressors or oncogenes in several cancers, the role of miR-149-3p in ACT remains unknown. In this study, we evaluated the expression of miR-149-3p in 67 pediatric ACT samples and 19 non-neoplastic adrenal tissues.

View Article and Find Full Text PDF
Article Synopsis
  • The study aims to assess the therapeutic potential of vitamin D receptor (VDR) signaling in adrenocortical carcinoma (ACC) cells, specifically H295R.
  • Researchers found that VDR was hypermethylated and underexpressed in these cells, but treatments with calcitriol and seocalcitol restored VDR signaling, reduced cell proliferation, and affected other signaling pathways.
  • In animal models, seocalcitol inhibited tumor growth and reduced steroid secretion from tumors without severe side effects, suggesting VDR could be a promising target for ACC therapy and patient management.
View Article and Find Full Text PDF

Children diagnosed with pediatric adrenocortical tumors (pACT) have variable outcomes, and, to date, the disease lacks robust prognostic biomarkers. The prognostic potential of tumor methylation has been demonstrated in several cancers. We aimed to evaluate the pACT methylation profile and its association with disease presentation and survival.

View Article and Find Full Text PDF

Objectives: To evaluate how telomere length behaves in adamantinomtous craniopharyngioma (aCP) and if it contributes to the pathogenesis of aCPs with and without CTNNB1 mutations.

Design: Retrospective cross-sectional study enrolling 42 aCP patients from 2 tertiary institutions.

Methods: Clinicopathological features were retrieved from the patient's charts.

View Article and Find Full Text PDF
Article Synopsis
  • Pediatric adrenocortical tumors (pACT) show complex genomic profiles and lack clear prognostic markers and treatment options, prompting research into the Vitamin D3 receptor (VDR) for potential insights.
  • A study involving 108 pediatric patients found that most pACT had low VDR expression and high methylation, particularly in more aggressive carcinomas, suggesting a link between VDR status and disease severity.
  • The findings indicate that VDR hypermethylation and underexpression could serve as important predictive and prognostic biomarkers for pACT, affecting patient outcomes.
View Article and Find Full Text PDF

Pediatric adrenocortical tumors (ACT) are rare aggressive neoplasms with heterogeneous prognosis. Despite extensive efforts, identifying reliable prognostic factors for pediatric patients with ACT remains a challenge. MicroRNA (miRNA) signatures have been associated with cancer diagnosis, treatment response, and prognosis of several types of cancer.

View Article and Find Full Text PDF

Introduction: Loss-of-function mutation of MKRN3 represents the most frequent genetic cause of familial central precocious puberty (CPP). The outcomes of gonadotropin-releasing hormone analog (GnRHa) treatment in CPP patients with MKRN3 defects are unknown.

Objective: To describe the clinical and hormonal features of patients with CPP with or without MKRN3 mutations after GnRHa treatment.

View Article and Find Full Text PDF

With recent progress in understanding the pathogenesis of adrenocortical tumors (ACTs), identification of molecular markers to predict their prognosis has become possible. Transcription factor 21 (TCF21)/podocyte-expressed 1 (POD1) is a transcriptional regulatory protein expressed in mesenchymal cells at sites of epithelial-mesenchymal transition during the development of different systems. Adult carcinomas express less than adenomas, in addition, the KEGG pathway analysis has shown that , among others genes, is negatively correlated with expression.

View Article and Find Full Text PDF

Background: Childhood-onset systemic lupus erythematosus (c-SLE) is a chronic autoimmune disease which increases cardiovascular risk factors (CRF) such as elevated homocysteine, TNF-α, and hs-C reactive protein.

Methods: We evaluated BMI, waist circumference (WC), 24-h recalls, SLEDAI-2 K, SLICC/ACR-DI, serum levels of homocysteine, folate, TNF-α, hs-C reactive protein, lipid profile, proteomic data, and duration of corticosteroid therapy in 19 c-SLE and 38 healthy volunteers. Physiological and anthropometric variables of c-SLE and healthy controls were compared by ANCOVA.

View Article and Find Full Text PDF

Adrenocortical tumor (ACT) is a malignancy with a low incidence rate and the current therapy for advanced disease has a limited impact on overall patient survival. A previous study from our group suggested that elevated expression of aurora-A and aurora-B is associated with poor outcome in childhood ACT. Similar results were also reported for adult ACTs.

View Article and Find Full Text PDF
Article Synopsis
  • - The study investigates the expression of three HLA class II genes (HLA-DRA, HLA-DPA1, and HLA-DPB1) in pediatric adrenocortical tumors (ACT) to determine their impact on disease aggressiveness and patient prognosis.
  • - Results show that lower expression levels of these genes are linked to worse outcomes, including older age at diagnosis, larger tumor size, and a higher likelihood of metastatic disease, with HLA-DPA1 identified as a significant independent prognostic factor.
  • - The findings suggest that decreased expression of these genes, particularly HLA-DPA1, may indicate a more aggressive disease course in pediatric ACT, which could serve as a potential marker for tumor aggressiveness. *
View Article and Find Full Text PDF

Background: There is great interindividual variability in the response to GH therapy. Ascertaining genetic factors can improve the accuracy of growth response predictions. Suppressor of cytokine signaling (SOCS)-2 is an intracellular negative regulator of GH receptor (GHR) signaling.

View Article and Find Full Text PDF

Background: The sonic hedgehog (SHH) pathway plays a key role in rodent adrenal cortex development and is involved in tumorigenesis in several human tissues, but data in human adrenal glands are limited.

Objectives: The objectives of the study were to analyze the involvement of the SHH pathway in human adrenal development and tumorigenesis and the effects of SHH inhibition on an adrenocortical tumor (ACT) cell line.

Patients And Methods: Expression of SHH pathway components was evaluated by immunohistochemistry in 51 normal adrenals (33 fetal) and 34 ACTs (23 pediatric) and by quantitative PCR in 81 ACTs (61 pediatric) and 19 controls (10 pediatric).

View Article and Find Full Text PDF

Ophthalmoscopy performed for the early diagnosis of retinopathy of prematurity (ROP) is painful for preterm infants, thus necessitating interventions for minimizing pain. The present study aimed to establish the effectiveness of human milk, compared with sucrose, for pain relief in premature infants subjected to ophthalmoscopy for the early diagnosis of ROP. This investigation was a pilot, quasi-experimental study conducted with 14 premature infants admitted to the neonatal intensive care unit (NICU) of a university hospital.

View Article and Find Full Text PDF

Aims: The study was designed to evaluate the newborn (NB) stress response during the inpatient time in the neonatal intensive care unit.

Methods: A quantitative, prospective, observational study was conducted with two NB groups. The first group consisted of 12 NB patients in the neonatal intensive care unit as the experimental group (EG), and the second included 43 NBs who were sent to their own homes and were considered the control group (CG).

View Article and Find Full Text PDF

Background: Pediatric adrenocortical tumors (ACT) are rare malignancies and treatment has a small impact on survival in advanced disease and the discovery of potential target genes could be important in new therapeutic approaches.

Methods: The mRNA expression levels of spindle checkpoint genes AURKA, AURKB, BUB, and BUBR1 were analyzed in 60 children with ACT by quantitative real time PCR. The anticancer effect of ZM447439, an experimental AURK inhibitor, was analyzed in a primary childhood ACT culture carrying the TP53 p.

View Article and Find Full Text PDF

Objectives: Idiopathic central precocious puberty and its postponement with a (gonadotropin-releasing hormone) GnRH agonist are complex conditions, the final effects of which on bone mass are difficult to define. We evaluated bone mass, body composition, and bone remodeling in two groups of girls with idiopathic central precocious puberty, namely one group that was assessed at diagnosis and a second group that was assessed three years after GnRH agonist treatment.

Methods: The precocious puberty diagnosis and precocious puberty treatment groups consisted of 12 girls matched for age and weight to corresponding control groups of 12 (CD) and 14 (CT) girls, respectively.

View Article and Find Full Text PDF

Background: Impaired apoptosis has been implicated in the development of childhood adrenocortical tumors (ACT), although the expression of apoptosis-related gene expression in such tumors has not been reported.

Methods: The mRNA expression levels of the genes CASP3, CASP8, CASP9, FAS, TNF, NFKB, and BCL2 were analyzed by quantitative real-time PCR in consecutive tumor samples obtained at diagnosis from 60 children with a diagnosis of ACT and in 11 non-neoplastic adrenal samples. BCL2 and TNF protein expression was analyzed by immunohistochemistry.

View Article and Find Full Text PDF