hrp0092p1-118 | Pituitary, Neuroendocrinology and Puberty | ESPE2019

Whole Exome Sequencing (WES) Reveals Oligogenic Gene Mutations in a Case of Combined Pituitary Hormone Deficiency (CPHD)

Sertedaki Amalia , Tatsi Elizabeth-Barbara , Nikaina Eirini , Vasilakis Ioannis Anargyros , Fylaktou Irene , Iacovidou Nicoletta , Siahanidou Soultana , Kanaka-Gantenbein Christina

Introduction: CPHD is characterized by GH and at least one other pituitary hormone deficiency. Mutations in genes expressed in the developing head, hypothalamus, and/or pituitary cause CPHD. To date around 30 genes have been identified to be related to CPHD, however the 85% of the cases remain with unknown aetiology. Whole Exome Sequencing (WES) enables parallel searching for pathogenic variants of CPHD in targeted known gene panels as well as the identifi...

hrp0089fc1.5 | Adrenals & HPA Axis | ESPE2018

Untargeted Plasma Metabolomics in Subjects with Differences in Tissue Glucocorticoid Sensitivity Identifies a Novel metabolic Signature

Nicolaides Nicolas C. , Ioannidi Maria-Konstantina , Koniari Eleni , Sertedaki Amalia , Klapa Maria I. , Chrousos George P. , Charmandari Evangelia

Background: Tissue glucocorticoid sensitivity is characterized by a considerable variation in terms of therapeutic response and side effects to synthetic glucocorticoids. The multi-metabolite concentration profile measured by untargeted plasma metabolomics provides a comprehensive metabolic signature that might be used in clinical practice.Objective and Hypotheses: To investigate the usefulness of plasma metabolomics in identifying a metabolic signature ...

hrp0089p2-p074 | Diabetes & Insulin P2 | ESPE2018

The Application of Next Generation Sequencing Mody Gene Panel in Greek Patients

Tatsi Elizabeth , Smirnaki Penelopi , Triantafilou Panagiota , Tsiroukidou Kyriaki , Kotsa Kalliopi , Lambadiari Vaia , Chrousos George , Kanaka-Gantenbein Christina , Sertedaki Amalia

Background: Maturity Onset Diabetes of the Young (MODY) constitutes a genetically and clinically heterogeneous type of Monogenic Diabetes (MD). It is characterized by early onset, autosomal dominant inheritance and a defect in β cell insulin secretion. To date 14 different MODY subtypes have been reported each one with a distinct genetic aetiology. However four are the most common subtypes, namely MODY 1 (HNF4A), MODY2 (GCK), MODY3 (HNF1A), MODY...

hrp0086fc1.2 | Adrenals | ESPE2016

Transcriptomic Analysis in Healthy Subjects with Differences in Tissue Sensitivity to Glucocorticoids Identifies Novel Disease-associated Genes

Nicolaides Nicolas C. , Polyzos Alexandros , Koniari Eleni , Lamprokostopoulou Agaristi , Golfinopoulou Eleni , Papathanasiou Chryssanthi , Sertedaki Amalia , Thanos Dimitris , Charmandari Evangelia

Background: Glucocorticoids exert profound immune-modulating effects and regulate the expression of genes involved in cell cycle progression and apoptosis. Synthetic glucocorticoids are the most potent agents used in the treatment of inflammatory, autoimmune and lymphoproliferative disorders. Considerable variation in response to therapeutic doses of glucocorticoids exists among individuals, as evidenced by differences both in disease response and in the incidence of glucocort...

hrp0082fc1.1 | Adrenal | ESPE2014

Molecular mechanisms of nongenomic glucocorticoid actions: the role of human glucocorticoid receptor S-palmitoylation

Nicolaides Nicolas C , Roberts Michael L , Kino Tomoshige , Katsantoni Eleni , Sertedaki Amalia , Chrousos George P , Charmandari Evangelia

Background: In humans, glucocorticoids (GCs) regulate a broad spectrum of physiologic functions, exerting both genomic and nongenomic actions through their ubiquitously expressed glucocorticoid receptor (hGR). The rapid nongenomic actions of GCs are likely to be mediated by membrane hGRs that transduce the glucocorticoid signal via activation of kinases. S-palmitoylation plays an important role in plasma membrane localization and occurs through a highly conserved nine amino ac...

hrp0082p2-d1-373 | Fat Metabolism & Obesity | ESPE2014

Expression Levels of the Growth-Arrest-Specific Transcript 5 in Overweight and Obese Children and Adolescents

Fragouli Terpsihori , Sertedaki Amalia , Farakla Ioanna , Nicolaides Nicolas C , Dracopoulou Maria , Papassotiriou Ioannis , Chrousos George P , Charmandari Evangelia

Background: The noncoding RNA growth-arrest-specific transcript 5 (Gas5) is abundant in cells whose growth has been arrested owing to lack of nutrients or growth factors. Gas5 is a riborepressor of the glucocorticoid receptor, influencing cell survival and metabolic activities during starvation by inhibiting the latter’s transcriptional activity.Aim: To determine the expression levels of Gas5 in blood samples of obese, overweight and lean children a...

hrp0084p2-168 | Adrenals | ESPE2015

The Natural Mutant Receptor hGRαT556I Causes Primary Generalised Glucocorticoid Resistance Through Decreased Affinity for the Ligand and Impaired Interaction with the GRIP1 Coactivator

Nicolaides Nicolas C , Skyrla Eirini , Vlachakis Dimitrios , Psarra Anna-Maria G , Sertedaki Amalia , Kossida Sophia , Charmandari Evangelia

Background: Primary generalised glucocorticoid resistance (PGGR) is a rare condition characterised by tissue insensitivity to glucocorticoids owing to inactivating mutations of the hGR gene. A new case of PGGR was reported in a patient with an adrenal incidentaloma harboring a novel heterozygous point mutation in the hGR gene, which resulted in threonine (T) to isoleucine (I) substitution at amino acid position 556 of the receptor.Objec...

hrp0094p1-105 | Adrenal B | ESPE2021

The genetic etiology of ACTH-dependent aldosterone hypersecretion in hypertensive patients without Primary Aldosteronism

Mourtzi Niki , Sertedaki Amalia , Markou Athina , Piaditis Georgios , Katsanis Nicholas , Traeger-Synodinos Joanne , Tsigos Constantinos , Charmandari Evangelia ,

Introduction: Compelling evidence suggests that Primary Aldosteronism (PA) is much more prevalent than previously thought, accounting for more than 20% of patients with resistant hypertension. Although, major advances have been made in the field of genetics underpinning sporadic and familial forms of PA, the etiology of mild forms of PA is poorly understood. In previous studies, we identified a distinct cohort of patients without PA who exhibited ACTH-dependen...

hrp0094p1-106 | Adrenal B | ESPE2021

Plasma Proteomics in Healthy Subjects with Differences in Tissue Glucocorticoid Sensitivity Identifies a Novel Proteomic Signature

Nicolaides Nicolas C. , Makridakis Manousos , Stroggilos Rafael , Koniari Eleni , Papageorgiou Ifigeneia , Sertedaki Amalia , Zoidakis Jerome , Charmandari Evangelia ,

Background: Tissue sensitivity to glucocorticoids is characterized by significant inter-individual variation in terms of therapeutic response and susceptibility to several stress-related disorders. Proteomics approaches, combined with appropriate bioinformatics analysis, offer a comprehensive description of molecular phenotypes with clear links to human disease pathophysiology.Objective and Hypotheses: To investigate the usefulness of pl...

hrp0097p1-434 | Diabetes and Insulin | ESPE2023

Monogenic Diabetes gene variants in 323 Greek MODY patients: Targeted NGS increases diagnostic accuracy and allows identification of rare MODY subtypes.

Mertzanian Anny , Sertedaki Amalia , Fylaktou Irene , Binou Maria , Dolianiti Maria , Nikolaides Nikolas , Anargyros Vasilakis Ioannis , Kanana-Gantenbein Christina

Introduction: Maturity Onset Diabetes of the Young (MODY) is clinically and genetically heterogeneous type of Monogenic Diabetes (MD) and to date 14 genes have been associated with different MODY subtypes. It is a rare disease characterized by early onset hyperglycemia, autosomal dominant inheritance, and defect in β cell insulin secretion, often misclassified as T1DM or T2DM.Materials and Methods: Genetic analysis ...