hrp0095p1-30 | Bone, Growth Plate and Mineral Metabolism | ESPE2022

Vitamin D may facilitate Clock/Bmal1-DNA interactions in a Vitamin D receptor-independent fashion

Nicolaides Nicolas , Papakonstantinou Eleni , Vlachakis Dimitrios , Chrousos George

Background: The Clock/Bmal1 transcription factor heterodimer regulates the circadian activities of many biological systems, including the hypothalamic-pituitary-adrenal (HPA) axis, by trans-activating or trans-repressing downstream target genes. 1,25 Dihydroxy Vitamin D (Vitamin D), a sterol hormone that is activated by exposure to sunlight, plays a fundamental role in maintaining calcium and phosphorus homeostasis. Recent evidence suggests that the nuclear vi...

hrp0092fc13.6 | Adrenals and HP Axis | ESPE2019

Insights Into the Role of Cortisol in the Formation of the Clock/Bmal1 Complex and its Interaction with dsDNA, via Molecular Dynamics Simulations

Nicolaides Nicolas , Raftopoulou Sofia , Kino Tomoshige , Vlachakis Dimitrios , Chrousos George

Background: The circadian rhythm-generating peripheral Clock/Bmal1 heterodimer complex regulates the circadian activities of many biological systems, including the hypothalamic-pituitary-adrenal (HPA) axis, by trans-activating or trans-repressing downstream target genes.Objective and Hypotheses: To investigate the potential role of elevated cortisol in Clock/Bmal1 heterodimer complex-generated circadian biorhythms, both ...

hrp0095p1-270 | Fat, Metabolism and Obesity | ESPE2022

Homology modelling analysis provides insight into ADCY3, a candidate obesity gene

Toumba Meropi , Fanis Pavlos , Neocleous Vassos , Vlachakis Dimitrios , Phylactou Leonidas , Skordis Nicos , Mantzoros Christos , Pantelidou Maria

Background: In an effort to better understand the molecular basis of obesity, studies focus on genetic loci mapping to the leptin–melanocortin pathway, one of the key mechanisms for controlling food intake and body weight. Adenylate cyclase 3 (ADCY3) is a key genetic candidate as it seems to have an essential role at primary neuronal cilia in regulating body weight. We have previously reported the novel probably pathogenic ADCY3</em...

hrp0086rfc1.1 | Adrenals | ESPE2016

Tracing the Glucocorticoid Receptor Evolutionary Pedigree: Insights from a Comprehensive Phylogenetic Analysis of the Full NR Super-Family

Vlachakis Dimitrios , Nicolaides Nicolas C. , Papageorgiou Louis , Lamprokostopoulou Agaristi , Charmandari Evangelia

Background: The nuclear receptor (NR) family comprises three main subfamilies: the steroid hormones receptors, the thyroid/retinoid hormone receptors and the orphan receptors. Proteins within the NR family share common domain architecture. These closely related receptors and their cognate ligand compounds play a key role in homeostasis, reproduction, growth and development. Despite their biological significance, their evolution and diversification remains to be elucidated....

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...

hrp0089lb-p4 | Late Breaking P1 | ESPE2018

An Updated Evolutionary Study in Glucocorticoid Receptors; Insights from a Comprehensive Phylogenetic, SNP’s and Mutation’s Analysis of the Nuclear Receptors Family: An Updated Evolutionary Study in Glucocorticoid Receptors; Insights from a Comprehensive Phylogenetic, SNP’s and Mutation’s Analysis of the Nuclear Receptors Family

Papageorgiou Louis , Papakonstantinou Eleni , Salis Constantinos , Raftopoulou Sofia , Mitsis Thanasis , Nicolaides Nicolas , Hagidimitriou Marianna , Eliopoulos Elias , Charmandari Evangelia , Chrousos George , Vlachakis Dimitrios

Background: Protein subfamilies within the Nuclear receptor (NR) family share common domain architecture. These closely related receptors and their cognate ligand compounds play a key role in homeostasis, reproduction, growth, and development. Despite their biological significance, their evolution and diversification remains to be elucidated. SNPs and mutations are characterized by the permanent alteration of the nucleotide sequence in the genome of an organism. These alterati...

hrp0082p1-d2-2 | Adrenals &amp; HP Axis | ESPE2014

Functional Characterization of a Novel Heterozygous Point Mutation in the Human Glucocorticoid Receptor Gene Causing Primary Generalized Glucocorticoid Resistance

Nicolaides Nicolas C , Vlachakis Dimitris , Sertedaki Amalia , Kossida Sophia , Chrousos George P , Charmandari Evangelia

Background: Primary generalized glucocorticoid resistance (PGGR) or Chrousos syndrome is a rare familial or sporadic condition caused by mutations in the hGR gene, which reduce tissue sensitivity to glucocorticoids. A new case of PGGR caused by a novel heterozygous point mutation in the hGR gene, which resulted in threonine (T) to isoleucine (I) substitution at amino acid position 556 in the ligand-binding domain of the receptor, was recently reported in a patient with an adre...

hrp0082p1-d3-167 | Growth (2) | ESPE2014

Aromatase Inhibitors in Girls: Anastrazole Combined to an LHRH Analogue is a Safe and Effective Strategy in Girls with Early or Precocious Puberty with Compromised Growth Potential

Papadimitriou Dimitrios T , Dermitzaki Eleni , Papaevangelou Vassiliki , Papadimitriou Anastasios

Background: Third generation aromatase inhibitors have been used to increase predicted adult height (PAH) in boys but in girls only in McCune–Albright syndrome.Objective and hypotheses: We overcame the theoretical concern of secondary hyperandrogenism by combining anastrazole to an LHRH analogue in a 6-year prospective study to test whether the combination therapy could significantly improve PAH compared to inhibition of puberty alone.<p class="...

hrp0089p1-p127 | Fat, Metabolism and Obesity P1 | ESPE2018

PCSK9 and Lp(a) Levels of Children Born after Assisted Reproduction Technologies

Kosteria Ioanna , Terentes-Printzios Dimitrios , Koutagiar Iosif , Vlachopoulos Charalambos , Gkourogianni Alexandra , Sakka Sophia , Skoumas Ioannis , Miliou Antigoni , Papassotiriou Ioannis , Loutradis Dimitrios , Chrousos George P , Tousoulis Dimitrios , Kanaka-Gantenbein Christina

Background/Aims: Since the introduction of Assisted Reproduction Technologies (ART), including classic In Vitro Fertilization (IVF) and Intacytoplasmic Sperm Injection (ICSI), in clinical practice, several studies have addressed concerns regarding the long-term health of the offspring, revealing indications of an adverse cardiometabolic outcome. Proprotein convertase subtilisin/kexin type 9 (PCSK9) circulating level is significantly associated with an increased risk of cardiov...

hrp0095p1-238 | Diabetes and Insulin | ESPE2022

Faster-acting insulin Fiasp vs insulin Novorapid in type 1 diabetes children and adolescents with sensor-augmented pump therapy

Xatzipsalti Maria , Triantafillidou Antigoni , Kourousi Giannoula , Patouni Konstantina , Bourousis Evangelos , Kassari Elisavet , Delis Dimitrios , Vazeou Andriani

Introduction: Rapid-acting insulin analogues have been developed to mimic more closely the physiological action of endogenous insulin. However, they still have a delayed onset of action and a longer duration compares to endogenous insulin. Therefore, newer insulin analogues have been developed with a faster onset and a shorter duration of action.Aim: To evaluate the efficacy of rapid-acting insulin analogues (Novorapid) ...