Publications by authors named "Ioannis Papagiannis"

Background/objective: Li-Fraumeni syndrome (LFS) is an inherited sequence variant in TP53 characterized by the early onset of various core malignancies including adrenocortical carcinoma (ACC), sarcomas, breast cancer, leukemias, and central nervous system tumors. We present a case of a patient with LFS who developed endocrine neoplasms not classically seen in LFS in addition to developing ACC.

Case Report: A 26-year-old nonbinary individual assigned female at birth with a history of LFS complicated by osteosarcoma of the jaw was incidentally found to have thyroid and sellar masses on surveillance magnetic resonance imaging.

View Article and Find Full Text PDF
Article Synopsis
  • The study focuses on pediatric cardiomyopathy in children under 18 in Crete, Greece, aiming to assess its epidemiology from 2002 to 2022.
  • The annual incidence was found to be 1.59 cases per 100,000 children, with dilated cardiomyopathy being the most common type (50%).
  • The research indicates a higher incidence of pediatric cardiomyopathy in Crete compared to other Caucasian populations, suggesting a need for further examination of genetic factors in this demographic.
View Article and Find Full Text PDF

Paediatric cardiomyopathies form a heterogeneous group of disorders characterized by structural and electrical abnormalities of the heart muscle, commonly due to a gene variant of the myocardial cell structure. Mostly inherited as a dominant or occasionally recessive trait, they might be part of a syndromic disorder of underlying metabolic or neuromuscular defects or combine early developing extracardiac abnormalities (i.e.

View Article and Find Full Text PDF

Background: Ferredoxin reductase (FDXR) has already been reported as a promising biomarker for estimating radiation doses in radiotherapy. This study aimed to investigate the responsiveness of FDXR on pediatric population exposed to ionizing radiation (X-rays) during pediatric interventional cardiology (IC) procedures.

Patients And Methods: Peripheral blood was collected by venipuncture from 24 pediatric donors before and 24 hours after the IC procedure.

View Article and Find Full Text PDF

Background: Rapidly progressive dementias (RPDs) are dementias that progress subacutely over a time period of weeks to months. Primary Sjögren's syndrome (pSS) is an autoimmune disease that can affect any organ system and may present with a wide range of clinical features that may mimic a plethora of medical conditions and, in rare cases, may manifest as RPD. We describe a unique case of pSS, in which rapidly progressive dementia (RPD) was the first disease manifestation, and the patient's radiological and electroencephalogram findings were compatible with Creutzfeldt- Jakob disease (CJD).

View Article and Find Full Text PDF

Objective: Rapid right ventricular pacing during balloon aortic valvuloplasty is commonly used to achieve balloon stability in children and adults. There is no consensus for the use of the technique in neonates and infants. We sought to review our institutional experience with rapid right ventricular pacing-assisted balloon aortic valvuloplasty across all age groups and evaluate the safety and effectiveness of the technique in the sub-group of neonates and infants <12months.

View Article and Find Full Text PDF

Objective: In 2008, the radiofrequency ablation (RFA) procedures registry of the Hellenic Society of Cardiology was created. This online database allowed electrophysiologists around the country to input data for all performed ablation procedures. The aim of this study is to provide a thorough report and interpretation of the data submitted to the registry between 2008 and 2018.

View Article and Find Full Text PDF

West Nile virus (WNV) is a mosquito-borne RNA flavivirus which caused several epidemics worldwide. The year 2018 was a WNV record year for Europe, including Greece, with earlier and longer transmission season with higher than the previous number of cases. It has been proposed that some simple biochemical markers may be helpful for the recognition of WNV neuroinvasive disease, its differential from other neurological infectious diseases and prognosis.

View Article and Find Full Text PDF

Photoelectrochemical cells have been constructed with photoanodes based on mesoporous titania deposited on transparent electrodes and sensitized in the Visible by nanoparticulate CdS or CdS combined with CdSe. The cathode electrode was an air-breathing carbon cloth carrying nanoparticulate carbon. These cells functioned in the Photo Fuel Cell mode, i.

View Article and Find Full Text PDF

The aim of this study was to examine the effect of the secondary biological treatment plant effluent administration on the kidneys, urinary bladder, and testis of Wistar rats in relation to lead (Pb) and cadmium (Cd) accumulation, since such an effluent is used for irrigation of edible plants. Male Wistar rats, randomly assigned into 5 groups, were treated with domestic sewage effluent (DSE) for 24 months. Cadmium and lead concentrations in the DSE, rats' tissues, and urine were estimated by means of atomic spectroscopy.

View Article and Find Full Text PDF

Type 2 diabetes is characterized by insulin resistance, hyperglycemia, and progressive β cell dysfunction. Excess glucose and lipid impair β cell function in islet cell lines, cultured rodent and human islets, and in vivo rodent models. Here, we examined the mechanistic consequences of glucotoxic and lipotoxic conditions on human islets in vivo and developed and/or used 3 complementary models that allowed comparison of the effects of hyperglycemic and/or insulin-resistant metabolic stress conditions on human and mouse islets, which responded quite differently to these challenges.

View Article and Find Full Text PDF

Introduction: In 2008 the radiofrequency ablation procedures (RFA) registry of the Hellenic Cardiological Society (HCS) was created. This is a dynamic, web-based application, which acts as the interface for storing and retrieving patients' demographic data and ablation procedures. Access to the site is permitted only to registered users.

View Article and Find Full Text PDF

Objective: To study the contribution of interferon-alpha (IFNalpha) and IFNgamma to the IFN gene expression signature that has been observed in microarray screens of peripheral blood mononuclear cells (PBMCs) from patients with systemic lupus erythematosus (SLE).

Methods: Quantitative real-time polymerase chain reaction analysis of healthy control PBMCs was used to determine the relative induction of a panel of IFN-inducible genes (IFIGs) by IFNalpha and IFNgamma. PBMCs from 77 SLE patients were compared with those from 22 disease controls and 28 healthy donors for expression of IFIGs.

View Article and Find Full Text PDF