Panagiotis Varelas

Mr. Panagiotis Varelas

orcid

Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

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

Representative Publications

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Journal Article
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Maria Anthi KouriMaria Anthi Kouri
Maria Anthi Kouri
ATAlexandra K Tsaroucha
Alexandra K Tsaroucha
TATheano Marina Axakali
Theano Marina Axakali
PVPanagiotis Varelas
Panagiotis Varelas
Vassilis KoulouliasVassilis Kouloulias
Vassilis Kouloulias
Efstathios P. EfstathopoulosEfstathios P. Efstathopoulos
Efstathios P. Efstathopoulos
At the intersection of nanotechnology and cancer biology, gold nanoparticles (AuNPs) have emerged as more than passive carriers—they are active agents capable of reshaping cellular fate. Among their most promising attributes is the potential to modulate apoptosis and autophagy, two intricately linked pathways that determine tumor response to stress, damage, and treatment. Apoptosis serves as the principal mechanism of programmed cell death, while autophagy offers a dualistic role—preserving survival under transient stress or contributing to cell death under sustained insult. Thus, understanding how these mechanisms interact—and how AuNPs influence this crosstalk—may be key to unlocking more effective oncologic therapies. This review explores the molecular interplay between apoptosis and autophagy in cancer and evaluates how AuNPs impact these pathways. By enhancing radiosensitization in radiation therapy and improving drug delivery and chemotherapeutic precision, AuNPs offer a unique strategy to circumvent resistance in aggressive or refractory tumors towards shaping their biological behavior and cellular pathways and, therefore, forming a patient-centered personalized therapeutic potential. Yet, clinical translation remains challenging. The dynamic physicochemical nature of AuNPs makes their biological behavior highly context-dependent. Combined with the complexity of apoptotic and autophagic signaling and tumor heterogeneity, this creates a triad of profound intricacy. However, within this complexity lies therapeutic opportunity. Framing AuNPs, apoptosis, and autophagy as a synergistic axis may enable mechanism-informed, adaptable, and patient-specific cancer therapies. This paradigm shift invites a more strategic integration of nanotechnology with molecular oncology, advancing the frontier of precision medicine.

29 June 2024 in Hellenic Journal of Cardiology
Verified
Journal Article
Open access
ITIoannis Tsiafoutis
Ioannis Tsiafoutis
TZTheodoros Zografos
Theodoros Zografos
DKDimitris Karelas
Dimitris Karelas
PVPanagiotis Varelas
Panagiotis Varelas
KMKonstantinos Manousopoulos
Konstantinos Manousopoulos
AKApostolos Katsivas
Apostolos Katsivas

1 January 2025 in Journal of Invasive Cardiology
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Journal Article
Closed access
IPIoannis Papadopoulos
Ioannis Papadopoulos
KFKonstantinos Filippou
Konstantinos Filippou
APAthanasios Papadopoulos
Athanasios Papadopoulos
PVPanagiotis Varelas
Panagiotis Varelas
DPDafni Pitsiori
Dafni Pitsiori
ITIoannis Tsiafoutis
Ioannis Tsiafoutis
An 81-year-old woman was admitted with dyspnea and irregular heartbeat due to atrial fibrillation with a rapid ventricular response. Echocardiography showed preserved left ventricular ejection fraction, severe aortic stenosis, and moderate mitral stenosis. Clinical Images from Journal of Invasive Cardiology. Atrial Fibrillation Coronary Angiography radial artery radial artery access

1 January 2025 in Journal of Invasive Cardiology
Verified
Journal Article
Closed access
PVPanagiotis Varelas
Panagiotis Varelas
KMKonstantinos Manousopoulos
Konstantinos Manousopoulos
KFKonstantinos Filippou
Konstantinos Filippou
DKDimitrios Karelas
Dimitrios Karelas
IPIoannis Papadopoulos
Ioannis Papadopoulos
ITIoannis Tsiafoutis
Ioannis Tsiafoutis
A 63-year-old man with stable angina was scheduled for elective percutaneous coronary intervention of a chronic total coronary occlusion of the right coronary artery (RCA) with epicardial bridging collaterals from the left circumflex artery to the posterior descending artery. He had previously received stents in the mid-RCA. Clinical Images from Journal of Invasive Cardiology. Chronic Total Occlusion CTO-PCI Intravascular ultrasound Thrombus

1 January 2025 in Journal of Invasive Cardiology
Verified
Journal Article
Closed access
DKDimitris Karelas
Dimitris Karelas
KFKonstantinos Filippou
Konstantinos Filippou
PVPanagiotis Varelas
Panagiotis Varelas
KMKonstantinos Manousopoulos
Konstantinos Manousopoulos
IPIoannis Papadopoulos
Ioannis Papadopoulos
ITIoannis Tsiafoutis
Ioannis Tsiafoutis
The authors present a technically informative case of a 65-year-old man referred for coronary angiography because of new onset presented angina during exercise. Clinical Images from Journal of Invasive Cardiology. balloon occlusion test Chronic Total Occlusion coronary artery coronary intervention

20 June 2025 in Hellenic Journal of Cardiology
Verified
Journal Article
Open access
PVPanagiotis Varelas
Panagiotis Varelas
DTDimitrios Tsikaderis
Dimitrios Tsikaderis
NMNikolaos Mezilis
Nikolaos Mezilis
KMKonstantinos Manousopoulos
Konstantinos Manousopoulos
KFKonstantinos Filippou
Konstantinos Filippou
PDPetros Dardas
Petros Dardas