Panagiotis Christopoulos

Prof. Panagiotis Christopoulos

National and Kapodistrian University of Athens, Athens, Attikí, Greece
orcid

Research Focus & Metrics

Academic Career Length

21Years (2006-Present)

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

Representative Publications

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5 August 2023 in Life
Verified
Journal Article
Open access
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Alkis MatsasAlkis Matsas
Alkis Matsas
DSDimitrios Stefanoudakis
Dimitrios Stefanoudakis
TTTheodore Troupis
Theodore Troupis
KKKonstantinos Kontzoglou
Konstantinos Kontzoglou
Makarios EleftheriadesMakarios Eleftheriades
Makarios Eleftheriades
DIDimitrios C. Iliopoulos
Dimitrios C. Iliopoulos
Ovarian cancer (OC) is characterized by silent progression and late-stage diagnosis. It is critical to detect and accurately diagnose the disease early to improve survival rates. Tumor markers have emerged as valuable tools in the diagnosis and management of OC, offering non-invasive and cost-effective options for screening, monitoring, and prognosis. Purpose: This paper explores the diagnostic importance of various tumor markers including CA-125, CA15-3, CA 19-9, HE4,hCG, inhibin, AFP, and LDH, and their impact on disease monitoring and treatment response assessment. Methods: Article searches were performed on PubMed, Scopus, and Google Scholar. Keywords used for the searching process were “Ovarian cancer”, “Cancer biomarkers”, “Early detection”, “Cancer diagnosis”, “CA-125”,“CA 15-3”,“CA 19-9”, “HE4”,“hCG”, “inhibin”, “AFP”, “LDH”, and others. Results: HE4, when combined with CA-125, shows improved sensitivity and specificity, particularly in early-stage detection. Additionally, hCG holds promise as a prognostic marker, aiding treatment response prediction and outcome assessment. Novel markers like microRNAs, DNA methylation patterns, and circulating tumor cells offer potential for enhanced diagnostic accuracy and personalized management. Integrating these markers into a comprehensive panel may improve sensitivity and specificity in ovarian cancer diagnosis. However, careful interpretation of tumor marker results is necessary, considering factors such as age, menopausal status, and comorbidities. Further research is needed to validate and refine diagnostic algorithms, optimizing the clinical significance of tumor markers in ovarian cancer management. In conclusion, tumor markers such as CA-125, CA15-3, CA 19-9, HE4, and hCG provide valuable insights into ovarian cancer diagnosis, monitoring, and prognosis, with the potential to enhance early detection.

11 April 2025 in Metabolites
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Journal Article
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Anastasios PotirisAnastasios Potiris
Anastasios Potiris
EMEfthalia Moustakli
Efthalia Moustakli
ETEleni Alexandros Trismpioti
Eleni Alexandros Trismpioti
EDEirini Drakaki
Eirini Drakaki
DMDespoina Mavrogianni
Despoina Mavrogianni
SSSofoklis Stavros
Sofoklis Stavros
Background/Objectives: Inflammation, infections, and oxidative stress (OS) all have an impact on male infertility, which is a complicated, multifaceted illness. OS affects motility and fertilization capability. It accomplishes this through damaging sperm DNA, oxidizing proteins, and triggering lipid peroxidation. These effects occur due to an imbalance between reactive oxygen species (ROS) and antioxidant defenses. Methods: This review aims to evaluate the impact of oxidative stress and inflammation on male infertility by assessing recent literature. Results: Pro-inflammatory cytokines, like TNF-α and IL-6, interfere with spermatogenesis and promote oxidative damage. Additionally, infections caused by pathogens like Escherichia coli and Chlamydia trachomatis alter the reproductive microenvironment, leading to sperm dysfunction and inflammation. Conclusions: Early detection and targeted treatment are essential due to the intricate interactions among these elements. Microbiota-modulating techniques, antimicrobial therapies, anti-inflammatory drugs, and antioxidants are therapeutic approaches that may help reduce oxidative damage and enhance male fertility.

Verified
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SSSofoklis Stavros
Sofoklis Stavros
Anastasios PotirisAnastasios Potiris
Anastasios Potiris
EMErmioni Molopodi
Ermioni Molopodi
DMDespoina Mavrogianni
Despoina Mavrogianni
AZAthanasios Zikopoulos
Athanasios Zikopoulos
PDPeter Drakakis
Peter Drakakis
Male factors may be present in up to 50–70% of infertile couples and the prevalence of male infertility accounts for 20–30% of infertility cases. Understanding the mechanisms and causes behind male infertility remains a challenge, but new diagnostic tools such as DNA fragmentation might aid in cases where the routine semen analysis is insufficient. DNA fragmentation, which refers to damages or breaks of the genetic material of the spermatozoa, is considered one of the main causes of male infertility due to impaired functional capability of sperm. The aim of the present narrative review is to investigate and enlighten the potential correlation between DNA fragmentation and male infertility parameters such as the seminal profile and the reproductive outcomes. Comprehensive research in PubMed/Medline and Scopus databases was conducted and 28 studies were included in the present review. Fourteen studies provided data regarding the impact of DNA fragmentation and seminal parameters and showed a correlation of significantly lower sperm count, lower concentration, motility, and abnormal morphology with an increased DNA fragmentation index (DFI). Similarly, 15 studies provided data regarding the impact of DFI on reproductive outcomes. Two studies showed higher aneuploidy rates with higher DFI values, and seven studies showed significantly lower pregnancy rates and live birth rates with higher DFI values. Ultimately, the studies included in this review highlight, collectively, the importance of measuring sperm DFI in the assessment of male infertility. Further studies are needed to explore the effectiveness of interventions aiming to reduce DFI levels.

1 May 2023 in Children
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SKSevasti Koulouraki
Sevasti Koulouraki
VPVasileios Dimitrios Paschos
Vasileios Dimitrios Paschos
Panagiota PervanidouPanagiota Pervanidou
Panagiota Pervanidou
Panagiotis ChristopoulosPanagiotis Christopoulos
Panagiotis Christopoulos
AGAngeliki Gerede
Angeliki Gerede
Makarios EleftheriadesMakarios Eleftheriades
Makarios Eleftheriades
Preeclampsia is a multisystemic clinical syndrome characterized by the appearance of new-onset hypertension and proteinuria or hypertension and end organ dysfunction even without proteinuria after 20 weeks of pregnancy or postpartum. Residing at the severe end of the spectrum of the hypertensive disorders of pregnancy, preeclampsia occurs in 3 to 8% of pregnancies worldwide and is a major cause of maternal and perinatal morbidity and mortality, accounting for 8–10% of all preterm births. The mechanism whereby preeclampsia increases the risk of the neurodevelopmental, cardiovascular, and metabolic morbidity of the mother’s offspring is not well known, but it is possible that the preeclamptic environment induces epigenetic changes that adversely affect developmental plasticity. These developmental changes are crucial for optimal fetal growth and survival but may lead to an increased risk of chronic morbidity in childhood and even later in life. The aim of this review is to summarize both the short- and long-term effects of preeclampsia on offspring based on the current literature.

1 December 2006 in Annals of the New York Academy of Sciences
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Journal Article
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DHD. Hassiakos
D. Hassiakos
Panagiotis ChristopoulosPanagiotis Christopoulos
Panagiotis Christopoulos
NVN. Vitoratos
N. Vitoratos
EXE. Xarchoulakou
E. Xarchoulakou
GVG. Vaggos
G. Vaggos
KPK. Papadias
K. Papadias

1 January 2009 in Gynecological Endocrinology
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Journal Article
Closed access
EDEythimios Deligeoroglou
Eythimios Deligeoroglou
CKChristina Kouskouti
Christina Kouskouti
Panagiotis ChristopoulosPanagiotis Christopoulos
Panagiotis Christopoulos
The polycystic ovary syndrome (PCOS), mainly characterized by clinical and/or biochemical hyperandrogenism, ovarian dysfunction and/or polycystic morphology as well as associated metabolic disorders, is the most common endocrine disorder in women of reproductive age. The familial clustering of PCOS cases and the accumulating evidence that the interaction between multiple genetic and environmental factors is necessary for the development of the syndrome, has triggered the conduct of genetic studies on PCOS. These studies have focused on many genetic polymorphisms, investigating their possible positive or negative correlation with the syndrome. The related genes can be grouped in four categories: those related with insulin resistance, those that interfere with the biosynthesis and the action of androgens, those that encode inflammatory cytokines and other candidate genes. Despite the progress that has been made in the elucidation of the genetic mechanisms of the PCOS, the genetic studies on the syndrome still face many obstacles and challenges. Further studies are needed, in order to shed new light in the pathogenesis of the syndrome, which will allow for new approaches in the diagnostics and therapeutics of PCOS.