Gerassimos J Mantzaris

Dr. Gerassimos J Mantzaris

orcid

Research Focus & Metrics

Academic Career Length

19Years (2008-Present)

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

Representative Publications

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1 February 2022 in Nutrients
Verified
Journal Article
Open access
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NVNikos Viazis
Nikos Viazis
KAkonstantinos argyriou
konstantinos argyriou
Katerina KotzampassiKaterina Kotzampassi
Katerina Kotzampassi
DCDimitrios K Christodoulou
Dimitrios K Christodoulou
PAPeriklis Apostolopoulos
Periklis Apostolopoulos
GMGerassimos J Mantzaris
Gerassimos J Mantzaris
Aim: To establish whether the addition of probiotics to a globally accepted Helicobacter pylori (H. pylori)-eradication scheme may reduce the rates of side effects and increase the eradication rates. Methods. Prospective, randomized, placebo-controlled trial of patients receiving eradication therapy for H. pylori in the eight participating centers. All patients received a 10-day proton pump inhibitor containing non-bismuth quadruple therapeutic regimen for H. pylori eradication (omeprazole 20 mg, amoxycillin 1 g, clarithromycin 500 mg, and metronidazole 500 mg all twice daily orally) and were randomized to receive either probiotics (group A) or placebo (group B). The probiotic used combined four probiotic strains, i.e., Lactobacillus Acidophilus, Lactiplantibacillus plantarum, Bifidobacterium lactis, and Saccharomyces boulardii. Results. Data were analyzed for 329 patients in group A and 335 patients in group B. Fifty six (17.0%) patients in group A and 170 (50.7%) patients in group B reported the occurrence of an H. pylori treatment-associated new symptom or the aggravation of a pre-existing symptom of any severity (p < 0.00001). H. pylori was successfully eradicated in 303 patients in group A (92.0%) and 291 patients in group B (86.8%), (p = 0.028). Conclusion: Adding probiotics to the 10-day concomitant non-bismuth quadruple H. pylori eradication regimen increases the eradication rate and decreases side effects.

1 October 2019 in Gastroenterology
Verified
Journal Article
Closed access
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PDParambir S. Dulai
Parambir S. Dulai
Laurent Peyrin-birouletLaurent Peyrin-biroulet
Laurent Peyrin-biroulet
SDSilvio Danese
Silvio Danese
BSBruce E. Sands
Bruce E. Sands
ADAxel Dignass
Axel Dignass
WSWilliam J. Sandborn
William J. Sandborn

3 February 2017 in Current Treatment Options in Gastroenterology
Verified
Journal Article
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GMGerassimos J Mantzaris
Gerassimos J Mantzaris

1 August 2021 in Gastroenterology
Verified
Journal Article
Open access
PDF file
ADand Marla C. Dubinsky
and Marla C. Dubinsky
RCRory Collins
Rory Collins
MAMaria T. Abreu
Maria T. Abreu
VJVipul Jairath
Vipul Jairath
JLJames D. Lewis
James D. Lewis
EZEllen Zigmont
Ellen Zigmont
Participants completed a survey focused on challenges in the conduct of clinical trials in IBD. The results showed that the greatest challenge in designing and completing studies in IBD was patient recruitment, Danese S. Schabel E. Ainsworth M.A. et al. Challenges and opportunities for IBD drug development: from early stage to regulatory approval. Gut. 2020; 69 : 1157-1161 Crossref PubMed Scopus (4) Google Scholar and it was also noted that the greatest opportunity was innovation in study design. The survey also collected opinions on the relative importance of induction and maintenance endpoints for clinical trials in IBD, and clinical remission was viewed the most important endpoint for both induction and maintenance.

31 October 2020 in Journal of Clinical Medicine
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Journal Article
Open access
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Mariangela AlloccaMariangela Allocca
Mariangela Allocca
MCMaría Chaparro
María Chaparro
HGHaidee Aleman Gonzalez
Haidee Aleman Gonzalez
MBMarta Maia Bosca-Watts
Marta Maia Bosca-Watts
CPCarolina Palmela
Carolina Palmela
GFGionata Fiorino
Gionata Fiorino
The impact of COVID-19 on inflammatory bowel disease (IBD) patients under pharmacological immunosuppression is still not clearly understood. We investigated the incidence of COVID-19 and the impact of immunosuppression and containment measures on the risk of SARS-CoV-2 infection in a large IBD cohort, from a multicenter cohort from 21st of February to 30th of June, 2020. Ninety-seven patients with IBD (43 UC, 53 CD, one unclassified IBD) and concomitant COVID-19 over a total of 23,879 patients with IBD were enrolled in the study. The cumulative incidence of SARS-CoV-2 infection in patients with IBD vs. the general population was 0.406% and 0.402% cases, respectively. Twenty-three patients (24%) were hospitalized, 21 (22%) had pneumonia, four (4%) were admitted to the Intensive Care Unit, and one patient died. Lethality in our cohort was 1% compared to 9% in the general population. At multivariable analysis, age > 65 years was associated with increased risk of pneumonia and hospitalization (OR 11.6, 95% CI 2.18–62.60; OR 5.1, 95% CI 1.10–23.86, respectively), treatment with corticosteroids increased the risk of hospitalization (OR 7.6, 95% CI 1.48–40.05), whereas monoclonal antibodies were associated with reduced risk of pneumonia and hospitalization (OR 0.1, 95% CI 0.04–0.52; OR 0.3, 95% CI 0.10–0.90, respectively). The risk of COVID-19 in patients with IBD is similar to the general population. National lockdown was effective in preventing infection in our cohort. Advanced age and treatment with corticosteroids impacted negatively on the outcome of COVID-19, whereas monoclonal antibodies did not seem to have a detrimental effect.

1 June 2016 in Clinical Therapeutics
Verified
Journal Article
Closed access
MMMichael Miligkos
Michael Miligkos
Konstantinos PapamichaelKonstantinos Papamichael
Konstantinos Papamichael
NCNiels Vande Casteele
Niels Vande Casteele
GMGerassimos J Mantzaris
Gerassimos J Mantzaris
AGAnn Gils
Ann Gils
EZElias Zintzaras
Elias Zintzaras