Stamatios Petousis

Prof. Dr. Stamatios Petousis

orcid

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

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

Representative Publications

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1 November 2018 in European Journal of Obstetrics & Gynecology and Reproductive Biology
Verified
Journal Article
Closed access
AAA Audebert
A Audebert
SPStamatios Petousis
Stamatios Petousis
CMC. Margioula-Siarkou
C. Margioula-Siarkou
KRK. Ravanos
K. Ravanos
NPN. Prapas
N. Prapas
YPY. Prapas
Y. Prapas

8 October 2018 in Ultrasound in Obstetrics & Gynecology
Verified
Journal Article
Open access
PDF file
ASAlexandros Sotiriadis
Alexandros Sotiriadis
SPStamatios Petousis
Stamatios Petousis
BTBasky Thilaganathan
Basky Thilaganathan
FFFrancesc Figueras
Francesc Figueras
WMWellington P. Martins
Wellington P. Martins
JHJon Hyett
Jon Hyett
Objective: The rate of maternal and perinatal complications increases after 39 weeks' gestation in both unselected and complicated pregnancies. The aim of this study was to synthesize quantitatively the available evidence on the effect of elective induction of labor at 39 weeks on the risk of Cesarean section, and on maternal and perinatal outcomes.Methods: PubMed, US Registry of Clinical Trials, SCOPUS and CENTRAL databases were searched from inception to August 2018. Additionally, the references of retrieved articles were searched. Eligible studies were randomized controlled trials of singleton uncomplicated pregnancies in which participants were randomized between 39 + 0 and 39 + 6 gestational weeks to either induction of labor or expectant management. The risk of bias of individual studies was assessed using the Cochrane Risk of Bias Tool. The overall quality of evidence was assessed according to the GRADE guideline. Primary outcomes included Cesarean section, maternal death and admission to the neonatal intensive care unit (NICU). Secondary outcomes included operative delivery, Grade‐3/4 perineal laceration, postpartum hemorrhage, maternal infection, hypertensive disease of pregnancy, maternal thrombotic events, length of maternal hospital stay, neonatal death, need for neonatal respiratory support, cerebral palsy, length of stay in NICU and length of neonatal hospital stay. Pooled risk ratios (RRs) were calculated using random‐effects models.Results: The meta‐analysis included five studies (7261 cases). Induction of labor was associated with a decreased risk for Cesarean section (moderate quality of evidence; RR 0.86 (95% CI, 0.78–0.94); I2 = 0.1%), maternal hypertension (moderate quality of evidence; RR 0.65 (95% CI, 0.57–0.75); I2 = 0%) and neonatal respiratory support (moderate quality of evidence; RR 0.73 (95% CI, 0.58–0.95); I2 = 0%). Neonates born after induction weighed, on average, 81 g (95% CI, 63–100 g) less than those born after expectant management. No significant effects were found for the other outcomes with the available data. The main limitation of our analysis was that the majority of data were derived from a single large study. A second limitation arose from the open‐label design of the studies, which may theoretically have affected the readiness of the attending clinician to resort to Cesarean section.Conclusions: Elective induction of labor in uncomplicated singleton pregnancy at 39 weeks' gestation is not associated with maternal or perinatal complications and may reduce the need for Cesarean section, risk of hypertensive disease of pregnancy and need for neonatal respiratory support. Copyright © 2018 ISUOG. Published by John Wiley & Sons Ltd.

3 August 2017 in Journal of Assisted Reproduction and Genetics
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Journal Article
Closed access
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YPYannis Prapas
Yannis Prapas
KRKonstantinos Ravanos
Konstantinos Ravanos
SPStamatios Petousis
Stamatios Petousis
YPYannis Panagiotidis
Yannis Panagiotidis
APAchilleas Papatheodorou
Achilleas Papatheodorou
NPNikos Prapas
Nikos Prapas

17 March 2020 in Gynecologic and Obstetric Investigation
Verified
Journal Article
Closed access
PDF file
GGGiuseppe Gullo
Giuseppe Gullo
SPStamatios Petousis
Stamatios Petousis
APAchilleas Papatheodorou
Achilleas Papatheodorou
YPYannis Panagiotidis
Yannis Panagiotidis
CMChrysoula Margioula-Siarkou
Chrysoula Margioula-Siarkou
YPYannis Prapas
Yannis Prapas
Purpose: To assess whether open and closed vitrification protocols are equally effective for sibling-oocyte cycles when performing blastocyst embryo transfers. Materials and Methods: A prospective study was set up comparing the open and the closed vitrification techniques in oocyte recipients sharing sibling oocytes between 2014 and 2016. Sibling oocytes were randomly and equally assigned into the closed group (oocytes vitrified in a closed system) or the open group (oocytes vitrified in an open system). Intracytoplasmic sperm injection was performed on all cases. Embryo transfers were performed on day 5. Power analysis calculation showed that 94 cycles would be needed for each group in the study in order to achieve statistical significance at a 5% level with power 80%. Results: The final number of donors included was 95. A total of 190 recipients matched with their donors were included in the study. There was no difference in the mean number of oocytes vitrified with the closed or the open system (8.26 ± 2.54 vs. 8.31 ± 2.57). No significant difference was observed between the 2 groups regarding survival rate, fertilization rate, cleavage rate, top-quality embryos on day 3, blastocyst rate, and top-quality blastocyst rate. Moreover, no statistically significant difference in the b-human chorionic gonadotropin-positive rate, clinical pregnancy rate per cycle, implantation rate, ongoing pregnancy rate, and live birth rate between closed and open groups. Conclusion: Οpen and closed vitrification protocols are equally effective for sibling-oocyte cycles.

21 June 2023 in Medicina
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Journal Article
Open access
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CAChristos Arnaoutoglou
Christos Arnaoutoglou
KDKalliopi Dampala
Kalliopi Dampala
CAChristos Anthoulakis
Christos Anthoulakis
EPEvangelos G. Papanikolaou
Evangelos G. Papanikolaou
ITIoannis Tentas
Ioannis Tentas
KSKonstantinos Sapalidis
Konstantinos Sapalidis
Ovarian cancer is a malignant disease that affects thousands of patients every year. Currently, we use surgical techniques for early-stage cancer and chemotherapy treatment combinations for advanced stage cancer. Several novel therapies are currently being investigated, with gene therapy and stem cell therapy being the corner stone of this investigation. We conducted a thorough search on PubMed and gathered up-to-date information regarding epithelial ovarian cancer therapies. We present, in the current review, all novel treatments that were investigated in this field over the past five years, with a particular focus on local treatment.

31 May 2024 in Cancers
Verified
Journal Article
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ASAntonia Syrnioti
Antonia Syrnioti
SPStamatios Petousis
Stamatios Petousis
LNLisa A. Newman
Lisa A. Newman
CMChrysoula Margioula-Siarkou
Chrysoula Margioula-Siarkou
Theodora PapamitsouTheodora Papamitsou
Theodora Papamitsou
TKTriantafyllia Koletsa
Triantafyllia Koletsa
Triple Negative Breast Cancer (TNBC) is characterized by distinct molecular subtypes with unique biological and clinical features. This systematic review aimed to identify articles examining the differences in the tumor immune microenvironment (TIME) across different TNBC molecular subtypes. Six studies meeting inclusion criteria were analyzed, utilizing gene expression profiling and bioinformatic analyses to classify TNBC samples into molecular subtypes, as well as immunohistochemistry and cell deconvolution methods to characterize the TIME. Results revealed significant heterogeneity in immune cell composition among TNBC subtypes, with the immunomodulatory (IM) subtype demonstrating robust immune infiltration, composed mainly of adaptive immune cells along with an increased density of CTLA-4+ and PD-1+ TILs, high PD-L1 tumor cell expression, and upregulation of FOXP3+ Tregs. A more immunosuppressive TIME with a predominance of innate immune cells and lower levels of tumor-infiltrating lymphocytes (TILs) was observed in luminal androgen receptor (LAR) tumors. In mesenchymal stem-like (MSL) tumors, the TIME was mainly composed of innate immune cells, with a high number of M2 tumor-associated macrophages (TAMs), while the BL and M tumors displayed poor adaptive and innate immune responses, indicating an “immune-cold” phenotype. Differential activation of signaling pathways, genomic diversity, and metabolic reprogramming were identified as contributors to TIME heterogeneity. Understanding this interplay is crucial for tailoring therapeutic strategies, especially regarding immunotherapy.