Ioannis Gkekas

ORCID: 0000-0002-7382-3636
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About
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Research Areas
  • Genetic factors in colorectal cancer
  • COVID-19 and healthcare impacts
  • Gallbladder and Bile Duct Disorders
  • Colorectal Cancer Screening and Detection
  • Colorectal Cancer Treatments and Studies
  • Pancreatic and Hepatic Oncology Research
  • Trauma and Emergency Care Studies
  • Cholangiocarcinoma and Gallbladder Cancer Studies
  • 3D Printing in Biomedical Research
  • Cardiac, Anesthesia and Surgical Outcomes
  • Abdominal vascular conditions and treatments
  • Appendicitis Diagnosis and Management
  • Microfluidic and Bio-sensing Technologies
  • Colorectal Cancer Surgical Treatments
  • Global Health Workforce Issues
  • Bone Tissue Engineering Materials
  • Abdominal Trauma and Injuries
  • Mitochondrial Function and Pathology
  • Congenital Anomalies and Fetal Surgery
  • Genetic Neurodegenerative Diseases
  • Colorectal and Anal Carcinomas
  • Nuclear Receptors and Signaling
  • Inflammatory Biomarkers in Disease Prognosis
  • Radiation Dose and Imaging
  • Machine Learning in Materials Science

Umeå University
2017-2024

Bielefeld University
2023-2024

Centre for Research and Technology Hellas
2020-2023

Cambridge University Hospitals NHS Foundation Trust
2023

Aristotle University of Thessaloniki
2023

Laboratoire des Sciences de l'Ingénieur, de l'Informatique et de l'Imagerie
2020-2022

University of Birmingham
2020-2021

NIHR Birmingham Biomedical Research Centre
2021

Yorkshire Cancer Research
2021

Urology Foundation
2021

Anita Balakrishnan Petros Barmpounakis Nikolaos Demiris Asif Jah Harry Spiers and 95 more Shibojit Talukder Jack L. Martin Paul Gibbs Simon Harper Emmanuel Huguet Vasilis Kosmoliaptsis Siong S Liau Raaj Praseedom Bristi Basu X. De Aretxabala Javier Lendoire Shishir K. Maithel Alejandro Brañes Bodil Andersson Alejandro Serrablo Volkan Adsay Tomoyuki Abe Mohammad Abu Hilal Maria del Mar Achalandabaso Boira Mustapha Adham Mohamed Adam Maryam Ahmad Bilal Al‐Sarireh Maite Albiol Nassir Alhaboob Adnan Alseidi Houssem Ammar Akshay Anand Bodil Andersson Pantelis Antonakis Verónica Araya Stanley W. Ashley Georgi Atanasov Fabio Ausania Ricardo Balestri Abhirup Banerjee Sudeep Banerjee Vin Shen Ban Giedrius Barauskas F. Bartsch Andrea Belli Simona Beretta Frederik Berrevoet Ramesh Bhandari Gerardo Blanco‐Fernández Louisa Bolm Mathieu Bonal Emre Bozkurt Andries E. Braat Luke Bradshaw Konstantinos Bramis Alejandro Brañes Lyle Burdine Matthew Byrne Maria Caceres Maria Jesús Castro Santiago Benjamin Chan Lynn Chong Ahmet Çöker María Conde Rodríguez Daniel Croagh Alyn Crutchley Carmen Cutolo Mathieu D’Hondt D.M. D'Souza Freek Daams Raffaele Dalla Valle José Davide Mario De Bellis M. de Boer Céline De Meyere Philip de Reuver Matthew R. Dixon Panagiotis Dorovinis Gabriela Echeverría Bauer Maria Eduarda Hasan H. Eker Joris I. Erdmann Mert Erkan Evangelos Felekouras Emanuele Felli Eduardo Fernandes Eduardo Figueroa Rivera Andras Fulop D Galun Michael F. Gerhards Poya Ghorbani Fabio Giannone Luis Gil Emmanouil Giorgakis Mario Giuffrida Felice Giuliante Ioannis Gkekas Miguel Ángel Gómez Bravo Bas Groot Koerkamp

10.1016/j.eclinm.2023.101951 article EN cc-by EClinicalMedicine 2023-04-13

Spinocerebellar ataxia type 1 (SCA1) is a neurodegenerative disease caused by the expansion of polyglutamine (polyQ) tract in ATXN1 protein. This thought to be responsible for gradual aggregation mutant protein, which associated with increased cytotoxicity and neuronal cell death. Apart from polyQ tract, other domains are also involved initial events protein such as dimerization domain that promotes oligomerization. interacts various proteins; among them, MED15 significantly enhances...

10.1101/2025.03.17.643445 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2025-03-17

Abstract Background Systemic inflammatory response in colorectal cancer (CRC) has been established as a prognostic factor for impaired cancer-specific survival, predominantly patients with right-sided tumors. On the other hand, defective mismatch repair (dMMR) tumors, primarily located right colon, are known to have favorable survival and dense local immune infiltration. The aim of this study was see if there is any form relationship between these seemingly diverse entities. Methods Complete...

10.1186/s12967-020-02336-6 article EN cc-by Journal of Translational Medicine 2020-04-21

Plant cells are omnipotent and breeding of new varieties can be achieved by protoplast fusion. Such fusions treatment with poly(ethylene glycol) or applying an electric field. Microfluidic devices allow for controlled conditions targeted manipulation small batches down to single-cell analysis. To provide achieve high reproducibility, we developed characterized a microfluidic device reliably trap some Arabidopsis thaliana protoplasts induced cell fusion addition (PEG, molecular weight 6000)....

10.3390/plants13020295 article EN cc-by Plants 2024-01-18

Background: Biocompatible materials-topography could be used for the construction of scaffolds allowing three-dimensional (3D) organization human stem cells into functional tissue-like structures with a defined architecture. Methods: Structural characterization an alumina-based substrate was performed through XRD, Brunauer–Emmett–Teller (BET) analysis, scanning electron microscopy (SEM), and wettability measurements. Biocompatibility assessed by measuring proliferation differentiation neural...

10.3390/jfb11030065 article EN cc-by Journal of Functional Biomaterials 2020-09-16

Spinocerebellar ataxia type 1 (SCA1) is an autosomal dominant neurodegenerative disease caused by a trinucleotide (CAG) repeat expansion in the ATXN1 gene. It characterized presence of polyglutamine (polyQ) intranuclear inclusion bodies (IIBs) within affected neurons. In order to investigate impact polyQ IIBs SCA1 pathogenesis, we generated novel protein aggregation model inducible overexpression mutant ATXN1(Q82) isoform human neuroblastoma SH-SY5Y cells. Moreover, developed simple and...

10.3389/fnmol.2023.1280546 article EN cc-by Frontiers in Molecular Neuroscience 2023-12-06

Stage II colon cancer is primarily a surgical disease. Only still not well-defined subset of patients may benefit from postoperative adjuvant chemotherapy. The relationship between chemotherapy and survival after relapse furthermore definitely explored in this group patients. A number reports suggest some association defective mismatch repair (dMMR) colorectal stage prognosis, but due to contradictory results existing studies, the exact predictive role fully understood.Retrospective...

10.1002/jso.25798 article EN Journal of Surgical Oncology 2019-12-11
Anita Balakrishnan Asif Jah Mickaël Lesurtel Bodil Andersson Paul Gibbs and 95 more Simon Harper Emmanuel Huguet Vasilis Kosmoliaptsis Siong S Liau Raaj Praseedom José Manuel Ramia Alejandro Brañes Javier Lendoire Shishir K. Maithel Alejandro Serrablo Tomoyuki Abe Ma del Mar Achalandabaso M. Adham Ana Maria Rukie Ahmet Bilal Al‐Sarireh M. Albiol Quer Felipe Alconchel M. Alsammani Adnan Alseidi Akshay Anand Alessandro Anselmo Pantelis Antonakis Elena Arabadzhieva Xabier de Aretxabala S. Aroori Stanley W. Ashley Fabio Ausania Abhirup Banerjee Matteo Barabino Adam Bartlett F. Bartsch Antonio Belli José Luis Beristain-Hernández Frederik Berrevoet Abu Bakar Hafeez Bhatti Rajan Bhojwani Bergþór Björnsson Blaž Trotovšek Matthew Byrne M Prieto Calvo Jorge Castellanos María José Castro D. Cavallucci David K. Chang G. Christodoulis Oriana Ciacio Pierre‐Alain Clavien Ahmet Çöker M. Conde-Rodriguez F.E. D'Amico Mathieu D’Hondt Freek Daams Bhargavi Dasari Mario De Bellis V.E. de Meijer Kristóf Dede Giacomo Deiro Fernando Delgado Gunjan Desai Antonio Gioia Marcello Di Martino Matthew R. Dixon Panagiotis Dorovinis Traian Dumitrașcu Tomoki Ebata Malin Sternby Eilard Joris I. Erdmann Mert Erkan Simone Famularo Emanuele Felli M. Fergadi Gerardo Blanco‐Fernández Fox A Saurabh Galodha D Galun S. Ganandha Rafael García George Gemenetzis Fabio Giannone L. Gil Emmanouil Giorgakis Francesco Giovinazzo Maria Carmela Giuffrida Tommaso Giuliani Felice Giuliante Ioannis Gkekas Mahesh Goel Brian K. P. Goh António Gomes Thomas Gruenberger Óscar Guevara Aistė Gulla Amit Gupta Rahul Gupta Abdul Hakeem

10.1016/j.hpb.2022.06.014 article EN publisher-specific-oa HPB 2022-07-09

Abstract The systemic inflammatory response (SIR), defined as elevated levels of circulating C-reactive protein (CRP), is an important predictor impaired survival in colorectal cancer. aim this study was to explore the prognostic role SIR and its association with tumour mismatch repair status immune response. Immune activity profiles mononuclear cells isolated from CRC tissues blood U-CAN exploration cohort ( n = 69), were analysed by flow cytometry. In validation 257), T-helper (T-bet + ),...

10.1038/s41598-024-80803-6 article EN cc-by Scientific Reports 2024-11-29

Abstract Background and Objectives Disparities between tumors arising via different sporadic carcinogenetic pathways have not been studied systematically. This retrospective multicenter cohort study evaluated the differences in risk for non‐colorectal malignancy colorectal cancer (CRC) patients from DNA mismatch repair status. Methods A European including total of 1706 CRC treated 1996 2019 three countries. The proficiency (pMMR) or deficiency (dMMR) was determined by immunohistochemistry....

10.1002/jso.27619 article EN cc-by Journal of Surgical Oncology 2024-03-12

Abstract Introduction The optimal timing of surgery for acute cholecystitis has been subject debate, but the predominant view supports early cholecystectomy. This study investigates safety cholecystectomy during weekends compared to delaying until weekdays. Method A population-based cohort based on data from GallRiks (Swedish National Register Gallstone Surgery and Endoscopic Retrograde Cholangiopancreateatography). Data cholecystectomies 2006-2020 were analysed. Patients operated with...

10.1093/bjs/znae175.012 article EN other-oa British journal of surgery 2024-08-01

The latest developments in tissue engineering scaffolds have sparked a growing interest the creation of controlled 3D cellular structures that emulate intricate biophysical and biochemical elements found within versatile vivo microenvironments. objective this study was to 3D-print monolithic silica scaffold specifically designed for cultivation neural precursor cells. Initially, preliminary investigation conducted identify critical parameters pertaining calcination. This aimed produce sturdy...

10.3390/jfb14090465 article EN cc-by Journal of Functional Biomaterials 2023-09-09

Plant cells are omnipotent and breeding of new varieties can be achieved by protoplast fusion. Such fusions treatment with poly(ethylene glycol) or applying an electric field. Microfluidic devices allow for controlled conditions targeted manipulation small batches down to single cell analysis. To provide achieve high reproducibility, we developed characterized a microfluidic device reliably trap few Arabidopsis thaliana protoplasts induced fusion addition (PEG, molecular weight 6000)....

10.20944/preprints202312.1114.v1 preprint EN 2023-12-15

Intraoperative rendezvous endoscopic retrograde cholangiopancreatography (ERCP) is one of the single-stage options available for managing common bile duct stones during laparoscopic cholecystectomy [1]. The procedure allows immediate biliary cannulation and reduces risk post-ERCP pancreatitis [1] [2]. We report a case omentum stomach strangulation caused by trans-cystic guidewire routine ERCP, an unusual complication.

10.1055/s-0034-1391865 article EN Endoscopy 2015-06-12

Drug discovery involves extremely costly and time consuming procedures can be significantly benefited by computational approaches, such as virtual screening (VS). Structure-based VS relies on scoring functions which aim to evaluate the binding of a candidate compound (ligand) protein target. Over last few years, advancement deep learning field has led development novel based convolutional neural networks (CNN), have achieved state-of-the-art results. In this paper, we present an integrated...

10.1109/bibe50027.2020.00030 article EN 2020-10-01

The primary therapy for biliary atresia is a surgical hepatic portoenterostomy, known as Kasai procedure, which has been shown to reduce mortality. Patients that undergo this procedure often develop complications such ascending cholangitis and cirrhosis. In case of recurrent cholangitis, revision percutaneous drainage are the most used techniques, while in rare cases endoscopic retrograde cholangiopan­creatography (ERCP) used. Here we report patient with intrahepatic lithiasis secondary...

10.11648/j.js.20190702.14 article EN Journal of Surgery 2019-01-01
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