Ioannis Papanikolaou

Prof. Ioannis Papanikolaou

orcid

Research Focus & Metrics

Academic Career Length

18Years (2009-Present)

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

Representative Publications

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1 January 2011 in World Journal of Gastrointestinal Endoscopy
Verified
Journal Article
Open access
Ioannis PapanikolaouIoannis Papanikolaou
Ioannis Papanikolaou
Konstantinos TriantafyllouKonstantinos Triantafyllou
Konstantinos Triantafyllou
AKAnastasia Kourikou
Anastasia Kourikou
TRThomas Rösch
Thomas Rösch
Endoscopic ultrasonography for gastric submucosal lesions

8 May 2020 in Microorganisms
Verified
Journal Article
Open access
PDF file
Georgios TziatziosGeorgios Tziatzios
Georgios Tziatzios
PGParaskevas Gkolfakis
Paraskevas Gkolfakis
Ioannis PapanikolaouIoannis Papanikolaou
Ioannis Papanikolaou
RMRuchi Mathur
Ruchi Mathur
MPMark Pimentel
Mark Pimentel
Konstantinos TriantafyllouKonstantinos Triantafyllou
Konstantinos Triantafyllou
Functional dyspepsia (FD) is one of the most prevalent chronic functional gastrointestinal disorders. Several distinct pathophysiological mechanisms, including gastro duodenal motor disorders, visceral hypersensitivity, brain-gut interactions, duodenal subtle inflammation, and genetic susceptibility, have been implicated in the pathogenesis of the disease, so far. However, emerging evidence suggests that both quantitative and qualitative disturbances of the gastrointestinal microbiota may also be implicated. In this context, several studies have demonstrated differences of the commensal bacterial community between patients with FD and healthy controls, while others have shown that intestinal dysbiosis might associate with disease’s symptoms severity. Elucidating these complex interactions constituting the microbiota and host crosstalk, may eventually lead to the discovery of novel, targeted therapeutic approaches that may be efficacious in treating the multiple aspects of the disorder. In this review, we summarize the data of the latest research with focus on the association between gut microbiota alterations and host regarding the pathogenesis of FD.

10 January 2025 in Journal of Clinical Medicine
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Journal Article
Open access
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HMHelen Michalopoulou
Helen Michalopoulou
John ThymisJohn Thymis
John Thymis
Stamatios LampsasStamatios Lampsas
Stamatios Lampsas
George PavlidisGeorge Pavlidis
George Pavlidis
Konstantinos KatogiannisKonstantinos Katogiannis
Konstantinos Katogiannis
Ignatios IkonomidisIgnatios Ikonomidis
Ignatios Ikonomidis
Metabolic dysfunction-associated steatotic liver disease (MASLD) is an emerging global health concern, and it is not only the keystone precursor of eventual liver-related morbidity, but it also places patients at considerably higher cardiovascular risk, which is still a leading cause of death in these patients. The most important common underlying pathophysiological mechanisms in these diseases are primarily related to insulin resistance, chronic inflammation and oxidative stress. The presence of MASLD with cardiovascular disease (CVD) and type 2 diabetes mellitus (T2DM) elevates the risk for poor outcomes, thus this review highlights a method to the therapeutic approaches. Given the intertwined nature of MASLD, T2DM, and CVD, there is an urgent need for therapeutic strategies that address all three conditions. Although lifestyle changes are important as treatment, medication plays a crucial role in managing hyperglycemia, enhancing liver function and lowering cardiovascular risk. The onset and progression of MASLD should be addressed through a multifaceted therapeutic approach, targeting inflammatory, immune, metabolic, oxidative stress, hormonal and gutaxis pathways, alongside the treatment strategies for T2DM. In this review, we discuss the effects of antidiabetic drugs with an impact on both liver outcomes and cardiovascular risk in patients affected by MASLD, T2DM and CDV.

22 March 2022 in Gut and Liver
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Journal Article
Open access
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Ioannis PapanikolaouIoannis Papanikolaou
Ioannis Papanikolaou
PSPeter Derk Siersema
Peter Derk Siersema
Ioannis S. Papanikolaou and Peter D. Siersema. Gut and Liver 2022;16:667-75. https://doi.org/10.5009/gnl210327

2 May 2019 in Gastroenterology Research and Practice
Verified
Journal Article
Open access
PDF file
PGParaskevas Gkolfakis
Paraskevas Gkolfakis
GTGeorgios Tziatzios
Georgios Tziatzios
Ioannis PapanikolaouIoannis Papanikolaou
Ioannis Papanikolaou
Konstantinos TriantafyllouKonstantinos Triantafyllou
Konstantinos Triantafyllou
Background and Aims. Inpatients’ bowel preparation before colonoscopy is frequently inadequate, and various interventions have been investigated to improve it, so far. We aimed to evaluate the efficacy of various interventions to improve inpatients’ colon preparation quality. Methods. We systematically reviewed the literature for publications on interventions aiming to improve the quality of inpatients’ colon preparation until June, 2018. Significant heterogeneity—measured with I2—was detected at the level of P<0.1. Adequacy rates were measured using inverse variance, and the size effect of different interventions was calculated using random effects model and expressed as odds ratio (OR). Results. Seventeen studies enrolling 2733 inpatients were included. Overall, 67% (60-75%) of the participants achieved adequate colon cleansing (I2=97%; P<0.001). In six studies assessing the impact of educational interventions to patient/physician/nurse vs. no intervention, adequate bowel preparation was achieved in 77% (62-91%) vs. 50% (32-68%) of the patients (OR 95%CI=3.49 (1.67-7.28), P=0.0009; I2=74%; P=0.002). Ten studies examined variations (qualitative and/or quantitative) in bowel preparation regimens with adequate preparation detected in 71% (60-81%) of the participants, and a single study examined the administration of preparation through an esophagogastroduodenoscope, resulting in adequate prep in 71% of the patients. Conclusions. Despite several interventions, only two-thirds of inpatients achieve adequate colon preparation before colonoscopy. Educational interventions significantly improve inpatients’ bowel preparation quality.

7 March 2019 in World Journal of Gastroenterology
Verified
Journal Article
Open access
Konstantinos TriantafyllouKonstantinos Triantafyllou
Konstantinos Triantafyllou
PGParaskevas Gkolfakis
Paraskevas Gkolfakis
GTGeorgios Tziatzios
Georgios Tziatzios
Ioannis PapanikolaouIoannis Papanikolaou
Ioannis Papanikolaou
LFLorenzo Fuccio
Lorenzo Fuccio
CHCesare Hassan
Cesare Hassan
Effect of Endocuff use on colonoscopy outcomes: A systematic review and meta-analysis