Athanasios Gatsis

Mr. Athanasios Gatsis

orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

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

Representative Publications

View All Publications
1 September 2025 in Cancers
Verified
Journal Article
Open access
PDF file
CDChristos Demosthenous
Christos Demosthenous
Paschalis EvangelidisPaschalis Evangelidis
Paschalis Evangelidis
AGAthanasios Gatsis
Athanasios Gatsis
IMIoannis Mitroulis
Ioannis Mitroulis
SVSofia Vakalopoulou
Sofia Vakalopoulou
Eleni GavriilakiEleni Gavriilaki
Eleni Gavriilaki
Chimeric antigen receptor-T (CAR-T) cell immunotherapy constitutes a cornerstone in the management of patients with relapsed/refractory B-cell lineage lymphoid malignancies. Toxicities such as cytokine release syndrome (CRS), immune effector cell-associated neurotoxicity syndrome (ICANS), and hematotoxicity (ICAHT) have been recognized in the post-infusion period. The initial interplay between CAR-T cells and tumor cells, followed by cytokine release and the bystander activation of the innate immunity cells, result in endothelial cell injury. In the current review, the ongoing research regarding endothelial injury in CAR-T cell recipients is summarized. Various markers of endothelial injury have been investigated in CAR-T cell recipients, including markers of complement activation, such as soluble C5b-9, endothelial dysfunction (angiopoietin-2, VCAM1, ICAM-1), inflammation, and thrombosis (von Willebrand antigen, ADAMTS13, thrombomodulin). The expression level of these endothelial injury markers has been identified as impaired in CAR-T cell recipients, not only when compared with healthy controls but also among patients with severe CRS/ICANS and those with mild toxicities or without toxicities. Furthermore, the Endothelial Activation and Stress Index (EASIX) and modified versions of this score, calculated in the pre- and early post-infusion period, seem to predict development of severe toxicities, ICAHT, and, thus, poor overall survival in CAR-T cell patients. More data concerning the role of these endothelial injury markers and clinical outcomes in CAR-T cell settings are essential.

19 September 2024 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
ASAntonios Siargkas
Antonios Siargkas
Ioannis TsakiridisIoannis Tsakiridis
Ioannis Tsakiridis
AGAthanasios Gatsis
Athanasios Gatsis
Catalina De Paco MatallanaCatalina De Paco Matallana
Catalina De Paco Matallana
María del Mar GilMaría del Mar Gil
María del Mar Gil
Themistoklis DagklisThemistoklis Dagklis
Themistoklis Dagklis
Objective: This meta-analysis aims to quantitatively summarize current data on various potential risk factors of velamentous cord insertion (VCI). A better understanding of these risk factors could enhance prenatal identification both in settings with routine screening and in those where universal screening for cord insertion anomalies is not yet recommended. Methods: A systematic search was conducted in MEDLINE, Cochrane Library, and Scopus from their inception until 7 February 2024. Eligible studies included observational studies of singleton pregnancies with VCI, identified either prenatally or postnatally, compared with pregnancies with central or eccentric cord insertion. Analyses were performed using DerSimonian and Laird random-effects models, with outcomes reported as risk ratios (RR) or mean differences with 95% confidence intervals (CI). Results: In total, 14 cohort and 4 case-control studies were included, reporting on 952,163 singleton pregnancies. Based on the cohort studies, the overall prevalence of VCI among singleton pregnancies was calculated to be 1.54%. The risk of VCI was significantly higher among pregnancies conceived using assisted reproductive technology (RR, 2.32; 95% CI: 1.77–3.05), nulliparous women (RR, 1.21; 95% CI: 1.15–1.28), women who smoked (RR, 1.14; 95% CI: 1.08–1.19), and pregnancies diagnosed with placenta previa (RR, 3.60; 95% CI: 3.04–4.28). Conclusions: This meta-analysis identified assisted reproductive technology, nulliparity, smoking, and placenta previa as significant risk factors of VCI among singleton pregnancies. These findings could inform screening policies in settings where universal screening for cord insertion is not routinely performed, suggesting a targeted approach for women with these specific risk factors.

1 December 2022 in Current Medicinal Chemistry
Verified
Journal Article
Closed access
PDF file
EAEfstratios Athanasiou
Efstratios Athanasiou
Georgios-Ioannis VerrasGeorgios-Ioannis Verras
Georgios-Ioannis Verras
SPSavvas Papageorgiou
Savvas Papageorgiou
IKIoannis Kelesis
Ioannis Kelesis
AGAthanasios Gatsis
Athanasios Gatsis
Mohammad KamalMohammad Kamal
Mohammad Kamal
According to the latest epidemiological data, breast cancer has recently been the most frequently diagnosed malignancy. To date, a body of evidence has established the involvement of multiple - and frequently interrelated - genetic and environmental factors in the pathogenesis of the disease. Emerging research on cancer prevention has highlighted the deterrence potential of interventions targeting environmental risk factors, particularly diet. In this aspect, the current review reveals the latest scientific results regarding epigallocatechin-3-gallate (EGCG) - a catechin most commonly found in green tea, as a potential chemopreventive dietary agent against breast cancer. in vitro studies on EGCG have demonstrated its effect on cell cycle progression and its potential to suppress several intracellular signaling pathways involved in breast cancer pathogenesis. In addition, EGCG possesses specific apoptosis-inducing characteristics that seem to enhance its role as a regulator of cell survival. Preclinical data seem to support using EGCG as an effective adjunct to EGFR-targeting treatments. The authors’ appraisal of the literature suggests that although preclinical evidence has documented the anticarcinogenic features of EGCG, limited large-scale epidemiological studies are investigating the consumption of EGCG - containing nutrients in the prevention and management of breast cancer risk. This literature review aims to liaise between preclinical and epidemiological research, surveying the existing evidence and unraveling relevant knowledge gaps.

6 December 2024 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
ASAntonios Siargkas
Antonios Siargkas
Ioannis TsakiridisIoannis Tsakiridis
Ioannis Tsakiridis
AGAthanasios Gatsis
Athanasios Gatsis
Catalina De Paco MatallanaCatalina De Paco Matallana
Catalina De Paco Matallana
María del Mar GilMaría del Mar Gil
María del Mar Gil
Themistoklis DagklisThemistoklis Dagklis
Themistoklis Dagklis
Background: Marginal cord insertion (MCI) is increasingly recognized as a pathological variation that necessitates early diagnosis. Identifying the risk factors associated with MCI is essential for improving prenatal screening and optimizing management strategies. Our meta-analysis systematically and quantitatively synthesizes the current evidence on various potential risk factors for MCI. Methods: This systematic review and meta-analysis adhered to the PRISMA and MOOSE guidelines. Comprehensive searches were performed in three databases up until 6 May 2024, identifying observational cohort and case–control studies that examined risk factors for MCI in singleton pregnancies compared with central or eccentric cord insertion. Quality and risk of bias assessment were performed using the Newcastle–Ottawa Scale and the Quality In Prognosis Studies tool, respectively. Statistical analyses employed random-effects models to calculate relative risks (RR) and mean differences with their 95% confidence intervals (95% CI). Heterogeneity was assessed via Cochran’s Q and I2 statistics. Results: A total of 18 studies (14 cohort and 4 case–control), encompassing 51,463 MCI cases and 901,020 control cases, were included. The meta-analysis revealed a prevalence of MCI at 5.71% among singleton pregnancies. Significant risk factors for MCI included the use of assisted reproductive technology (RR = 1.55; 95% CI: 1.34–1.78), chronic hypertension (RR = 1.47; 95% CI: 1.11–1.95), placenta previa (RR = 1.83; 95% CI: 1.62–2.08), and nulliparity (RR = 1.18; 95% CI: 1.08–1.30). No significant associations were found for smoking, maternal age, prior Cesarean section, preexisting diabetes, or Caucasian ethnicity. Sensitivity analyses corroborated the robustness of these findings. Conclusions: This meta-analysis identified assisted reproductive technology, chronic hypertension, placenta previa, and nulliparity as significant risk factors for marginal cord insertion in singleton pregnancies. These findings can inform the development of prenatal screening protocols and enable targeted screenings for high-risk populations.

9 November 2025 in EJC Skin Cancer
Verified
Journal Article
Open access
KLKonstantinos Lallas
Konstantinos Lallas
PTPhilipp Tschandl
Philipp Tschandl
HKHarald Kittler
Harald Kittler
TATeresa Amaral
Teresa Amaral
AKAthanassios Kyrgidis
Athanassios Kyrgidis
Aimilios LallasAimilios Lallas
Aimilios Lallas

21 September 2026 in Antimicrobial Stewardship & Healthcare Epidemiology
Verified
Journal Article
Open access
PDF file
JLJustin Laracy
Justin Laracy
AGAthanasios Gatsis
Athanasios Gatsis
JYJudy Yan
Judy Yan
RKRich Kodama
Rich Kodama
MKMini Kamboj
Mini Kamboj
We evaluated the utility of nearly twelve thousand Streptococcus pneumoniae urine antigen tests at a tertiary cancer center. Overall, test positivity rate was low. Testing during hospital days 0–2 yielded a greater positivity rate than testing at hospital 3 or beyond (1.2% vs 0.89%, P = .15). This trend was preserved among patients with neutropenia (1.2% vs 0.68%; P = .30) and those who had received cellular therapy within the preceding year (1.3% vs 0.34%; P = .11).