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S. Siakavellas · SciRah

Researcher profile · Semantic Scholar

S. Siakavellas

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S. Siakavellas — researcher profile on SciRah

h-index: 25
Works: 85
Citations: 1,807

Most-cited papers

The risk of hepatocellular carcinoma decreases after the first 5 years of entecavir or tenofovir in Caucasians with chronic hepatitis B
G. Papatheodoridis, R. Idilman, G. Dalekos, M. Buti +23 more
2017Hepatology262 citations Open access
Semantic Scholar
Circulating levels of TNF-like cytokine 1A (TL1A) and its decoy receptor 3 (DcR3) in rheumatoid arthritis.
G. Bamias, S. Siakavellas, K. Stamatelopoulos, Elda Chryssochoou +2 more
2008Clinical Immunology122 citations
Semantic Scholar
Changing Pattern in the Clinical Presentation of Pediatric Celiac Disease: A 30-Year Study
E. Roma, J. Panayiotou, Helen Karantana, Catherin Constantinidou +4 more
2009Digestion120 citations Open access
Semantic Scholar
Eight-year survival in chronic hepatitis B patients under long-term entecavir or tenofovir therapy is similar to the general population.
G. Papatheodoridis, V. Sypsa, G. Dalekos, C. Yurdaydın +23 more
2018Journal of Hepatology99 citations
Semantic Scholar
High intestinal and systemic levels of decoy receptor 3 (DcR3) and its ligand TL1A in active ulcerative colitis.
G. Bamias, G. Kaltsa, S. Siakavellas, K. Papaxoinis +4 more
2010Clinical Immunology91 citations
Semantic Scholar
Role of the IL-23/IL-17 axis in Crohn's disease.
S. Siakavellas, G. Bamias
2012Discover medicine88 citations
Semantic Scholar
Immunological Characteristics of Colitis Associated with Anti-CTLA-4 Antibody Therapy
G. Bamias, I. Delladetsima, M. Perdiki, S. Siakavellas +4 more
2017Cancer Investigation82 citations
Semantic Scholar
Fecal calprotectin measurement is a marker of short-term clinical outcome and presence of mucosal healing in patients with inflammatory bowel disease
A. Kostas, S. Siakavellas, C. Kosmidis, A. Takou +6 more
2017World Journal of Gastroenterology61 citations Open access
Semantic Scholar
Markers of bacterial translocation in end-stage liver disease.
I. Koutsounas, G. Kaltsa, S. Siakavellas, G. Bamias
2015World Journal of Hepatology57 citations Open access
Semantic Scholar
Significance of definitions of relapse after discontinuation of oral antivirals in HBeAg‐negative chronic hepatitis B
G. Papatheodoridis, S. Manolakopoulos, Tung-Hung Su, S. Siakavellas +4 more
2018Hepatology54 citations
Semantic Scholar
Tumor Necrosis Factor–like Cytokine TL1A and Its Receptors DR3 and DcR3: Important New Factors in Mucosal Homeostasis and Inflammation
S. Siakavellas, G. Bamias
2015Inflammatory Bowel Diseases54 citations
Semantic Scholar
Differential expression of the TL1A/DcR3 system of TNF/TNFR-like proteins in large vs. small intestinal Crohn's disease.
G. Bamias, G. Kaltsa, S. Siakavellas, M. Gizis +6 more
2012Digestive and Liver Disease53 citations
Semantic Scholar
The TL1A/DR3/DcR3 pathway in autoimmune rheumatic diseases.
S. Siakavellas, P. Sfikakis, G. Bamias
2015Seminars in Arthritis & Rheumatism49 citations
Semantic Scholar
Evaluation of portal hypertension in the cirrhotic patient: hepatic vein pressure gradient and beyond
D. Karagiannakis, T. Voulgaris, S. Siakavellas, G. Papatheodoridis +1 more
2018Scandinavian Journal of Gastroenterology38 citations
Semantic Scholar
Effectiveness and Safety of Adalimumab Biosimilar SB5 in Inflammatory Bowel Disease: Outcomes in Originator to SB5 Switch, Double Biosimilar Switch and Bio-Naïve SB5 Observational Cohorts
L. Derikx, Heather W Dolby, N. Plevris, L. Lucaciu +13 more
2021Journal of Crohn's & Colitis37 citations Open access
Semantic Scholar
Comparative Study of Candidate Housekeeping Genes for Quantification of Target Gene Messenger RNA Expression by Real-Time PCR in Patients with Inflammatory Bowel Disease
G. Bamias, D. Goukos, Eyfrosyni Laoudi, Iliana G Balla +3 more
2013Inflammatory Bowel Diseases36 citations
Semantic Scholar
Temporal Trends in Surgical Resection Rates and Biologic Prescribing in Crohn's Disease: A Population-based Cohort Study.
P. Jenkinson, N. Plevris, S. Siakavellas, M. Lyons +5 more
2020Journal of Crohn's & Colitis35 citations Open access
Semantic Scholar
Liver cirrhosis-effect on QT interval and cardiac autonomic nervous system activity
Elias Tsiompanidis, S. Siakavellas, Anastasios Tentolouris, I. Eleftheriadou +4 more
2018World Journal of Gastrointestinal Pathophysiology35 citations Open access
Semantic Scholar
Predictors of response to anti-tumor necrosis factor therapy in ulcerative colitis.
E. Zampeli, M. Gizis, S. Siakavellas, G. Bamias
2014World Journal of Gastrointestinal Pathophysiology35 citations Open access
Semantic Scholar
Assessment, endoscopy, and treatment in patients with acute severe ulcerative colitis during the COVID-19 pandemic (PROTECT-ASUC): a multicentre, observational, case-control study
S. Sebastian, G. Walker, N. Kennedy, T. Conley +275 more
2021The Lancet Gastroenterology and Hepatology34 citations Open access
Semantic Scholar
Real-world experience with tofacitinib in ulcerative colitis: a systematic review and meta-analysis
L. Lucaciu, N. Constantine-Cooke, N. Plevris, S. Siakavellas +3 more
2021medRxiv32 citations Open access
Semantic Scholar
Normalization of Fecal Calprotectin Within 12 Months of Diagnosis is Associated with Reduced Risk of Disease Progression in Patients with Crohn's Disease.
N. Plevris, J. Fulforth, M. Lyons, S. Siakavellas +7 more
2020Clinical Gastroenterology and Hepatology30 citations
Semantic Scholar
Real‐world effectiveness and safety of ustekinumab for the treatment of Crohn's disease: the Scottish ustekinumab cohort
N. Plevris, J. Fulforth, S. Siakavellas, A. Robertson +23 more
2020Journal of Gastroenterology and Hepatology29 citations
Semantic Scholar
Checkpoint inhibitor colitis: a new model of inflammatory bowel disease?
S. Siakavellas, G. Bamias
2018Current Opinion in Gastroenterology29 citations
Semantic Scholar
Reliability and applicability of two-dimensional shear-wave elastography for the evaluation of liver stiffness
I. Varbobitis, S. Siakavellas, I. Koutsounas, D. Karagiannakis +8 more
2016European Journal of Gastroenterology and Hepathology27 citations
Semantic Scholar
Systematic Review with Network Meta-Analysis: Efficacy of Induction Therapy with a Second Biological Agent in Anti-TNF-Experienced Crohn's Disease Patients
C. Pagnini, S. Siakavellas, G. Bamias
2018Gastroenterology Research and Practice25 citations Open access
Semantic Scholar
Predictors of Response to Vedolizumab in Patients with Ulcerative Colitis: Results from the Greek VEDO-IBD Cohort
G. Bamias, G. Kokkotis, M. Gizis, C. Kapizioni +22 more
2021Digestive Diseases and Sciences20 citations Open access
Semantic Scholar
Systemic levels of human β-defensin 1 are elevated in patients with cirrhosis
G. Kaltsa, G. Bamias, S. Siakavellas, D. Goukos +7 more
2016Annals of gastroenterology : quarterly publication of the Hellenic Society of Gastroenterology20 citations
Semantic Scholar
Recent advances in the diagnosis and management of amoebiasis
Joseph Cooney, S. Siakavellas, Peter L. Chiodini, Ula Mahadeva +3 more
2024Frontline Gastroenterology16 citations Open access
Semantic Scholar
Early ileocolonoscopy with biopsy for the evaluation of persistent post-transplantation diarrhea.
G. Bamias, J. Boletis, Theodoros Argyropoulos, Chrysanthi Skalioti +5 more
2010World Journal of Gastroenterology12 citations Open access
Semantic Scholar
Associations between demographic, clinical and dietary factors and flares in inflammatory bowel disease: the PRognostic effect of Environmental factors in Crohn’s and Colitis (PREdiCCt) prospective cohort study
N. Constantine-Cooke, Beatriz Gros, N. Plevris, Linda J Williams +28 more
2026Gut11 citations Open access
Semantic Scholar
Exploring the Role of GITR/GITRL Signaling: From Liver Disease to Hepatocellular Carcinoma
Stavros P. Papadakos, Elena Chatzikalil, Georgios Vakadaris, Lampros Reppas +6 more
2024Cancers11 citations Open access
Semantic Scholar
Strongyloides hyperinfection syndrome presenting as enterococcal meningitis in a low-endemicity area
G. Bamias, A. Toskas, M. Psychogiou, I. Delladetsima +3 more
2010Virulence11 citations Open access
Semantic Scholar
Patterns of emergency admission for IBD patients over the last 10 years in Lothian, Scotland: a retrospective prevalent cohort analysis
M. Lyons, L. Derikx, J. Fulforth, S. McCall +12 more
2022Alimentary Pharmacology and Therapeutics10 citations Open access
Semantic Scholar
One-year Fibrosis-4 index helps identify minimal HCC risk in non-cirrhotic chronic hepatitis B patients with antiviral treatment
Tai-Chung Tseng, Jonggi Choi, M. Nguyen, C. Peng +11 more
2021Hepatology International10 citations Open access
Semantic Scholar
Atypical Mycobacterial Infection Presenting as Persistent Skin Lesion in a Patient with Ulcerative Colitis
G. Bamias, G. Daikos, S. Siakavellas, G. Kaltsa +4 more
2011Case Reports in Medicine9 citations Open access
Semantic Scholar
Inflammatory Bowel Disease (IBD)-Associated Colorectal Cancer (CRC): Is cGAS-STING Pathway Targeting the Key to Chemoprevention?
Stavros P. Papadakos, C. Georgiadou, Alexandra Argyrou, E. Michailidou +5 more
2025International Journal of Molecular Sciences8 citations
Semantic Scholar
Monitoring and comorbidities in patients with chronic hepatitis B currently treated with nucleos(t)ide analogs
S. Siakavellas, J. Goulis, S. Manolakopoulos, C. Triantos +7 more
2020Annals of gastroenterology : quarterly publication of the Hellenic Society of Gastroenterology8 citations Open access
Semantic Scholar
Rates, predictive factors and effectiveness of ustekinumab intensification to 4- or 6-weekly intervals in Crohn's disease.
L. Derikx, N. Plevris, Shanna Su, B. Gros +9 more
2022Digestive and Liver Disease7 citations Open access
Semantic Scholar
Elevated Serum Levels of the Antiapoptotic Protein Decoy-Receptor 3 Are Associated with Advanced Liver Disease
G. Bamias, M. Gizis, I. Delladetsima, Eyfrosyni Laoudi +8 more
2016Canadian Journal of Gastroenterology and Hepatology7 citations Open access
Semantic Scholar
Declining but persistent hepatocellular cancer risk beyond 10 years of entecavir or tenofovir in chronic hepatitis B: Results of the PAGE-B cohort.
G. Papatheodoridis, G. Dalekos, R. Idilman, V. Sypsa +16 more
2026Journal of Hepatology5 citations Open access
Semantic Scholar
Successful therapy with tenofovir disoproxil fumarate (TDF) in patients with chronic hepatitis B (CHB) does not guarantee amelioration of liver damage assessing by transient elastography. A retrospective - prospective multicenter study
H. Kranidioti, K. Zisimopoulos, T. Oikonomou, T. Voulgaris +7 more
2024BMC Gastroenterology5 citations Open access
Semantic Scholar
610 BOTH SINGLE AND MULTIPLE SWITCHING BETWEEN INFLIXIMAB BIOSIMILARS CAN BE SAFE AND EFFECTIVE IN INFLAMMATORY BOWEL DISEASE (IBD): REAL WORLD OUTCOMES FROM THE EDINBURGH IBD UNIT
S. Siakavellas, R. Barrett, N. Plevris, L. Derikx +7 more
20215 citations
Semantic Scholar
Platelet activation and hypercoagulability in patients with early primary biliary cholangitis compared with healthy controls
J. Vlachogiannakos, Jiannis Binas, S. Siakavellas, D. Karagiannakis +3 more
2021Annals of gastroenterology : quarterly publication of the Hellenic Society of Gastroenterology4 citations Open access
Semantic Scholar
The clinical and pathological significance of RCAS1 expression as a prognostic biomarker in non-small cell lung cancer.
N. Tsoukalas, I. Kostakis, S. Siakavellas, C. Giaginis +5 more
2014In Vivo3 citations
Semantic Scholar
Real-life cost of managing chronic HCV infection in Greece prior to Direct-Acting Antivirals (DAAs): an undeniable truth of spending more for less.
Kyriakos Souliotis, S. Siakavellas, C. Golna, E. Manesis +2 more
2018Hippokratia2 citations
Semantic Scholar
P378 Immunisation practices for hepatitis B and response to vaccination in Greek patients with inflammatory bowel disease
Despina Kalogera, S. Siakavellas, E. Zambeli, E. Tsironi +10 more
20182 citations
Semantic Scholar
Correlation of Impedance Threshold Device use during cardiopulmonary resuscitation with post‐cardiac arrest Acute Kidney Injury
P. Niforopoulou, N. Iacovidou, P. Lelovas, G. Karlis +6 more
2017American Journal of Emergency Medicine2 citations
Semantic Scholar
M1715 Increased Serum Levels of Apelin in Patients with Cirrhosis
G. Bamias, I. Zouboulis-Vafiadis, P. Nikolaou, S. Siakavellas +2 more
20092 citations Open access
Semantic Scholar
Expert recommendations regarding the use of fecal calprotectin in daily clinical practice: statements of a taskforce process from the Hellenic Group for the Study of Inflammatory Bowel Disease (EOMIFNE)
G. Bamias, S. Fessatou, C. Kapizioni, K. Kitsou +6 more
2026Annals of gastroenterology : quarterly publication of the Hellenic Society of Gastroenterology1 citations Open access
Semantic Scholar

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