Gerasimos Tsourouflis

Dr. Gerasimos Tsourouflis


Research Focus & Metrics

Academic Career Length

26Years (2001-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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14 June 2024 in Medicina
Verified
Journal Article
Open access
PDF file
Antonios DakanalisAntonios Dakanalis
Antonios Dakanalis
GVGavriela Voulgaridou
Gavriela Voulgaridou
OAOlga Alexatou
Olga Alexatou
Sousana PapadopoulouSousana Papadopoulou
Sousana Papadopoulou
CJConstantina A. Jacovides
Constantina A. Jacovides
CONSTANTINOS GIAGINISCONSTANTINOS GIAGINIS
CONSTANTINOS GIAGINIS
Background and Objectives: Overweight and obesity are growing public health challenges, particularly concerning young adults. University life presents a unique set of stressors that may influence weight management alongside sleep quality. In this cross-sectional study, we aimed to investigate the association between overweight or obesity, stress, and sleep quality in a large sample of Greek university students. Materials and Methods: The study recruited 2116 active students from across various Greek universities. Participants completed questionnaires on sociodemographics, academic performance, and physical activity levels using the International Physical Activity Questionnaire (IPAQ). Stress and sleep quality were assessed using the Perceived Stress Scale (PSS) and the Pittsburgh Sleep Quality Index (PSQI), respectively. Body weight and height were directly measured to calculate Body Mass Index (BMI). Results: Our analysis of 2116 Greek university students revealed significant associations between various factors and overweight/obesity. Compared to their rural counterparts, young adults in urban areas had an 88% higher prevalence of overweight/obesity (p = 0.0056). Regular smokers were twice as likely to be overweight or obese (p = 0.0012). Notably, those with low physical activity levels displayed a more than two-fold increased risk (p = 0.0008) compared to those with moderate or high activity levels. Similarly, students with moderate or high perceived stress levels had a more than two-fold prevalence of overweight/obesity compared to those with low stress (p = 0.0005). Inadequate sleep quality was also associated with an 86% higher risk of overweight/obesity (p = 0.0007). Interestingly, good academic performance showed a 57% greater prevalence of overweight/obesity compared to very good/excellent performance (p = 0.0103). Conclusions: Our findings reveal that perceived stress and poor sleep quality are significant risk factors for overweight and obesity in this young adult population.

9 April 2021 in Cancers
Verified
Journal Article
Open access
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Natalia GeorgantzoglouNatalia Georgantzoglou
Natalia Georgantzoglou
SKStefania Kokkali
Stefania Kokkali
GTGerasimos Tsourouflis
Gerasimos Tsourouflis
Stamatios TheocharisStamatios Theocharis
Stamatios Theocharis
Adrenocortical carcinoma is a rare malignancy with aggressive behavior, with up to 40% of patients presenting with metastases at the time of diagnosis. Both conventional chemotherapeutic regimens and novel immunotherapeutic agents, many of which are currently being tested in ongoing clinical trials, have yielded modest results so far, bringing the need for a deeper understanding of adrenal cancer behavior to the forefront. In the recent years, the tumor microenvironment has emerged as a major determinant of cancer response to immunotherapy and an increasing number of studies on other solid tumors have focused on manipulating the microenvironment in the favor of the host and discovering new potential target molecules. In the present review we aim to explore the characteristics of adrenocortical cancer’s microenvironment, highlighting the mechanisms of immune evasion responsible for the modest immunotherapeutic results, and identify novel potential strategies.

1 February 2022 in Diagnostics
Verified
Journal Article
Open access
PDF file
INIlias Nikas
Ilias Nikas
CONSTANTINOS GIAGINISCONSTANTINOS GIAGINIS
CONSTANTINOS GIAGINIS
KPKalliopi Petrouska
Kalliopi Petrouska
PAParaskevi Alexandrou
Paraskevi Alexandrou
AMArtemis Andreou Michail
Artemis Andreou Michail
Stamatios TheocharisStamatios Theocharis
Stamatios Theocharis
Ongoing research continues to elucidate the complex role of ephrin receptors (EPHs) and their ligands (ephrins) in breast cancer pathogenesis, with their varying expression patterns implied to have an important impact on patients’ outcome. The current study aims to investigate the clinical significance of EPHA2, EPHA4, and EPHA7 expression in triple-negative breast cancer (TNBC) cases. EPHA2, EPHA4, and EPHA7 protein expression was assessed immunohistochemically on formalin-fixed and paraffin-embedded (FFPE) TNBC tissue sections from 52 TNBC patients and correlated with key clinicopathologic parameters and patients’ survival data (overall survival (OS); disease-free survival (DFS)). EPHA2, EPHA4, and EPHA7 expression was further examined in TNBC cell lines. EPHA2 overexpression was observed in 26 (50%) of the TNBC cases, who exhibited a shorter OS and DFS than their low-expression counterparts, with EPHA2 representing an independent prognostic factor for OS and DFS (p = 0.0041 and p = 0.0232, respectively). EPHA4 overexpression was associated with lymph node metastasis in TNBC patients (p = 0.0546). Alterations in EPHA2, EPHA4, and EPHA7 expression levels were also noted in the examined TNBC cell lines. Our study stresses that EPHA2 expression constitutes a potential prognostic factor for TNBC patients. Given the limited treatment options and poorer outcome that accompany the TNBC subtype, EPHA2 could also pose as a target for novel, more personalized, and effective therapeutic approaches for those patients.

29 November 2023 in Journal of Geriatric Psychiatry and Neurology
Verified
Journal Article
Closed access
CTChristina Tryfonos
Christina Tryfonos
Eleni PavlidouEleni Pavlidou
Eleni Pavlidou
TVTheofanis Vorvolakos
Theofanis Vorvolakos
OAOlga Alexatou
Olga Alexatou
KVKonstantinos Vadikolias
Konstantinos Vadikolias
CONSTANTINOS GIAGINISCONSTANTINOS GIAGINIS
CONSTANTINOS GIAGINIS
A good nutritional status and healthy diets may decelerate disease disability and symptom severity and quality of life of peoples with multiple sclerosis (MS). Mediterranean diet (MD) can prevent several chronic diseases, including neurodegenerative disease. This is an observational, cross-sectional study on 279 older adults with MS, aiming to investigate the effects of MD against several aspects of mental health. Qualified questionnaires were used to assess disability and symptom severity, depression, anxiety, stress, sleep quality, cognitive status, physical activity, and MD adherence. Multivariate analysis showed that enhanced MD adherence was independently associated with lower prevalence of disability and symptom severity ( P = .0019), depression ( P = .0201), anxiety ( P = .0287), perceived stress ( P = .0021), inadequate sleep quality ( P = .0033), cognitive impairment ( P = .0018) and physical inactivity ( P = .0028). Adopting MD may ameliorate mental health disturbances in older adults with MS. Future public health policies should inform older adults with MS for the favorable impacts of MD in improving the mental health MS comorbidities.

26 July 2021 in Diagnostics
Verified
Journal Article
Open access
PDF file
DGDimitrios Goutas
Dimitrios Goutas
Stamatios TheocharisStamatios Theocharis
Stamatios Theocharis
GTGerasimos Tsourouflis
Gerasimos Tsourouflis
Histone deacetylases (HDACs) have long been implicated in tumorigenesis and tumor progression demonstrating their important participation in neoplasia. Therefore, numerous studies have been performed, highlighting the mechanism of HDACs action in tumor cells and demonstrating the potential role of HDAC inhibitors in the treatment of different cancer types. The outcome of these studies further delineated and strengthened the solid role that HDACs and epigenetic modifications exert in neoplasia. These results have spread promise regarding the potential use of HDACs as prospective therapeutic targets. Nevertheless, the clinical significance of HDAC expression and their use as biomarkers in cancer has not been extensively elucidated. The aim of our study is to emphasize the clinical significance of HDAC isoforms expression in different tumor types and the correlations noted between the clinicopathological parameters of tumors and patient outcomes. We further discuss the obstacles that the next generation HDAC inhibitors need to overcome, for them to become more potent.

14 March 2021 in Diagnostics
Verified
Journal Article
Open access
PDF file
DPDespoina Pouloudi
Despoina Pouloudi
MMMaria Manou
Maria Manou
Panagiotis SarantisPanagiotis Sarantis
Panagiotis Sarantis
NTNikolaos Tsoukalas
Nikolaos Tsoukalas
GTGerasimos Tsourouflis
Gerasimos Tsourouflis
Stamatios TheocharisStamatios Theocharis
Stamatios Theocharis
Salivary gland tumors (SGTs) comprise a group of rare neoplasms. Locally aggressive, recurrent and/or metastatic SGTs are notorious for their resistance to systemic therapy, making the need for carefully designed, prospective and randomized trials with useful predictive markers mandatory to define new effective therapeutic protocols. Histone Deacetylases (HDACs), are thought to play a crucial role in carcinogenesis. They affect the DNA structure, being also able to regulate its transcription, repair, and replication. This study aimed to evaluate—to our knowledge for the first time—the HDAC-1, -2, -4 and -6 immunohistochemical expression in SGTs and their potential use as prognostic biomarkers. Medical records and archival histopathological material of 58 (36 benign and 22 malignant) SGT patients were included in this study. The H-score was statistically correlated with the clinicopathological characteristics for all cases and patients’ survival rate in malignant SGTs. HDAC-2 positivity was significantly associated with more prolonged overall survival (OS) of patients with malignant SGTs (p = 0.028), while HDAC-2 positivity and no HDAC-6 expression were associated with prolonged OS of patients with HG malignant SGT (p = 0.003 and p = 0.043, respectively). Additionally, a high HDAC-2 H-score was significantly associated with longer OS for HG malignant SGT patients (p = 0.027). In our study, HDAC-2 expression is a marker for good prognosis, whereas HDAC-6 expression indicated poor prognosis; thus, an inhibitor of HDAC-6 may be used to improve patients’ survival.