98 results on '"Kontogiorgis C"'
Search Results
2. Overview of the European post-authorisation study register post-authorization studies performed in Europe from September 2010 to December 2018
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Sultana, J, Crisafulli, S, Almas, M, Antonazzo, I, Baan, E, Bartolini, C, Bertuccio, M, Bonifazi, F, Capuano, A, Didio, A, Ehrenstein, V, Felisi, M, Ferrajolo, C, Fontana, A, Francisca, R, Fourrier-Reglat, A, Fortuny, J, Gini, R, Hyeraci, G, Hoeve, C, Kontogiorgis, C, Isgro, V, Lalagkas, P, L'Abbate, L, Layton, D, Landi, A, Narduzzi, S, Roque Pereira, L, Poulentzas, G, Rafaniello, C, Roberto, G, Scondotto, G, Sportiello, L, Toma, M, Toussi, M, Verhamme, K, Volpe, E, Trifiro, G, Sultana J., Crisafulli S., Almas M., Antonazzo I. C., Baan E., Bartolini C., Bertuccio M. P., Bonifazi F., Capuano A., Didio A., Ehrenstein V., Felisi M., Ferrajolo C., Fontana A., Francisca R., Fourrier-Reglat A., Fortuny J., Gini R., Hyeraci G., Hoeve C., Kontogiorgis C., Isgro V., Lalagkas P. -N., L'Abbate L., Layton D., Landi A., Narduzzi S., Roque Pereira L., Poulentzas G., Rafaniello C., Roberto G., Scondotto G., Sportiello L., Toma M., Toussi M., Verhamme K., Volpe E., Trifiro G., Sultana, J, Crisafulli, S, Almas, M, Antonazzo, I, Baan, E, Bartolini, C, Bertuccio, M, Bonifazi, F, Capuano, A, Didio, A, Ehrenstein, V, Felisi, M, Ferrajolo, C, Fontana, A, Francisca, R, Fourrier-Reglat, A, Fortuny, J, Gini, R, Hyeraci, G, Hoeve, C, Kontogiorgis, C, Isgro, V, Lalagkas, P, L'Abbate, L, Layton, D, Landi, A, Narduzzi, S, Roque Pereira, L, Poulentzas, G, Rafaniello, C, Roberto, G, Scondotto, G, Sportiello, L, Toma, M, Toussi, M, Verhamme, K, Volpe, E, Trifiro, G, Sultana J., Crisafulli S., Almas M., Antonazzo I. C., Baan E., Bartolini C., Bertuccio M. P., Bonifazi F., Capuano A., Didio A., Ehrenstein V., Felisi M., Ferrajolo C., Fontana A., Francisca R., Fourrier-Reglat A., Fortuny J., Gini R., Hyeraci G., Hoeve C., Kontogiorgis C., Isgro V., Lalagkas P. -N., L'Abbate L., Layton D., Landi A., Narduzzi S., Roque Pereira L., Poulentzas G., Rafaniello C., Roberto G., Scondotto G., Sportiello L., Toma M., Toussi M., Verhamme K., Volpe E., and Trifiro G.
- Abstract
Background: The European post-authorisation study (EU PAS) register is a repository launched in 2010 by the European Medicines Agency (EMA). All EMA-requested PAS, commonly observational studies, must be recorded in this register. Multi-database studies (MDS) leveraging secondary data have become an important strategy to conduct PAS in recent years, as reflected by the type of studies registered in the EU PAS register. Objectives: To analyse and describe PAS in the EU PAS register, with focus on MDS. Methods: Studies in the EU PAS register from inception to 31st December 2018 were described concerning transparency, regulatory obligations, scope, study type (e.g., observational study, clinical trial, survey, systematic review/meta-analysis), study design, type of data collection and target population. MDS were defined as studies conducted through secondary use of >1 data source not linked at patient-level. Data extraction was carried out independently by 14 centres with expertise in pharmacoepidemiology, using publicly available information in the EU PAS register including study protocol, whenever available, using a standardised data collection form. For validation purposes, a second revision of key fields for a 15% random sample of studies was carried out by a different centre. The inter-rater reliability (IRR) was then calculated. Finally, to identify predictors of primary data collection-based studies/versus those based on secondary use of healthcare databases) or MDS (vs. non-MDS), odds ratios (OR) and 95% confidence intervals (CI) were calculated fitting univariate logistic regression models. Results: Overall, 1426 studies were identified. Clinical trials (N = 30; 2%), systematic reviews/meta-analyses (N = 16; 1%) and miscellaneous study designs (N = 46; 3%) were much less common than observational studies (N = 1227; 86%). The protocol was available for 63% (N = 360) of 572 observational studies requested by a competent authority. Overall, 36% (N = 446) of ob
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- 2022
3. Curcumin analogues as possible anti-proliferative & anti-inflammatory agents
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Katsori, A.-M., Chatzopoulou, M., Dimas, K., Kontogiorgis, C., Patsilinakos, A., Trangas, T., and Hadjipavlou-Litina, D.
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- 2011
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4. Composition and Antioxidant Activity of Olive Leaf Extracts from Greek Olive Cultivars
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Kiritsakis, Kostas, Kontominas, M. G., Kontogiorgis, C., Hadjipavlou-Litina, D., Moustakas, A., and Kiritsakis, A.
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- 2010
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5. Concordance of genotypic resistance interpretation algorithms in HIV-1 infected patients: An exploratory analysis in Greece
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Kantzanou, M. Karalexi, M.A. Zivinaki, A. Riza, E. Papachristou, H. Vasilakis, A. Kontogiorgis, C. Linos, A.
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virus diseases - Abstract
Purpose: Genotypic resistance-related mutations in HIV-1 disease are often difficult to interpret. Different algorithms have been developed to provide meaningful application into clinical context. We aimed to compare, for the first time in Greece, the results of genotypic resistance derived from three interpretation algorithms. Methods: The sequences of 120 HIV 1-infected patients were tested for genotypic resistance to 19 antiretroviral (ARV) drugs (n = 2280 sequences). The interpretation results of Rega, ANRS and ViroSeq algorithms were compared. Results: Complete concordance was found for 2/19 ARV drugs, namely lamivudine and emptricitabine. Concordance was high for nucleoside reverse transcriptase inhibitors (NRTIs) and low for protease inhibitors (PIs). In inter-algorithm pairs, agreement was high between Rega and ViroSeq (kappa = 0.701), especially by ARV class, namely NRTIs (k = 0.869) and NNRTIs (k = 0.562). The only exception was noted for rilpivirine, where agreement was higher between ANRS and Rega (k = 0.410) compared to other inter-algorithm pairs (k = 0.018−0.055). By contrast, for PIs all comparisons yielded concordance equivalent to chance (k = 0.000). Conclusions: Our exploratory analysis provided evidence of significant inter-algorithm discordances, especially for PIs and NNRTIs highlighting the importance of matching the results of different algorithms to achieve optimized risk stratification. Ongoing research could assist clinical physicians in interpreting complex genotypic resistance patterns. © 2021 Elsevier B.V.
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- 2021
6. Synthesis, bioactivity, pharmacokinetic and biomimetic properties of multi-substituted coumarin derivatives
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Katopodi, A. Tsotsou, E. Iliou, T. Deligiannidou, G.-E. Pontiki, E. Kontogiorgis, C. Tsopelas, F. Detsi, A.
- Abstract
A series of novel multi-substituted coumarin derivatives were synthesized, spectroscopically characterized, and evaluated for their antioxidant activity, soybean lipoxygenase (LOX) inhibitory ability, their influence on cell viability in immortalized human keratinocytes (HaCaT), and cytotoxicity in adenocarcinomic human alveolar basal epithelial cells (A549) and human melanoma (A375) cells, in vitro. Coumarin analogues 4a–4f, bearing a hydroxyl group at position 5 of the coumarin scaffold and halogen substituents at the 3-phenyl ring, were the most promising ABTS•+ scavengers. 6,8-Dibromo-3-(4-hydroxyphenyl)-4-methyl-chromen-2-one (4k) and 6-bromo-3-(4,5-diacetyloxyphenyl)-4-methyl-chromen-2-one (3m) exhibited significant lipid peroxidation inhibitory activity (IC50 36.9 and 37.1 µM). In the DCF-DA assay, the 4′-fluoro-substituted compound 3f (100%), and the 6-bromo substituted compounds 3i (80.9%) and 4i (100%) presented the highest activity. The 3′-fluoro-substituted coumarins 3e and 4e, along with 3-(4-acetyloxyphenyl)-6,8-dibromo-4-methyl-chromen-2-one (3k), were the most potent lipoxygenase (LOX) inhibitors (IC50 11.4, 4.1, and 8.7 µM, respectively) while displaying remarkable hydroxyl radical scavenging ability, 85.2%, 100%, and 92.9%, respectively. in silico docking studies of compounds 4e and 3k, revealed that they present allosteric interactions with the enzyme. The majority of the analogues (100 µM) did not affect the cell viability of HaCaT cells, though several compounds presented over 60% cytotoxicity in A549 or A375 cells. Finally, the human oral absorption (%HOA) and plasma protein binding (%PPB) properties of the synthesized coumarins were also estimated using biomimetic chromatography, and all compounds presented high %HOA (>99%) and %PPB (60–97%) values. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
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- 2021
7. Impact of foods and dietary supplements containing hydroxycinnamic acids on cardiometabolic biomarkers: A systematic review to explore inter-individual variability
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Martini, D., Chiavaroli, L., Gonzalez-Sarrias, A., Bresciani, L., Palma-Duran, S. A., Dall'Asta, Margherita, Deligiannidou, G. -E., Massaro, M., Scoditti, E., Combet, E., Maksimova, V., Urpi-Sarda, M., Kontogiorgis, C. A., Andres-Lacueva, C., Gibney, E. R., Del Rio, D., Morand, C., Garcia-Aloy, M., Rodriguez-Mateos, A., Mena, P., Dall'asta M. (ORCID:0000-0002-0558-0337), Martini, D., Chiavaroli, L., Gonzalez-Sarrias, A., Bresciani, L., Palma-Duran, S. A., Dall'Asta, Margherita, Deligiannidou, G. -E., Massaro, M., Scoditti, E., Combet, E., Maksimova, V., Urpi-Sarda, M., Kontogiorgis, C. A., Andres-Lacueva, C., Gibney, E. R., Del Rio, D., Morand, C., Garcia-Aloy, M., Rodriguez-Mateos, A., Mena, P., and Dall'asta M. (ORCID:0000-0002-0558-0337)
- Abstract
Plant-based diets rich in bioactive compounds such as polyphenols have been shown to positively modulate the risk of cardiometabolic (CM) diseases. The inter-individual variability in the response to these bioactives may affect the findings. This systematic review aimed to summarize findings from existing randomized clinical trials (RCTs) evaluating the effect of hydroxycinnamic acids (HCAs) on markers of CM health in humans. Literature searches were performed in PubMed and the Web of Science. RCTs on acute and chronic supplementation of HCA-rich foods/extracts on CM biomarkers were included. Forty-four RCTs (21 acute and 23 chronic) met inclusion criteria. Comparisons were made between RCTs, including assessments based on population health status. Of the 44 RCTs, only seven performed analyses on a factor exploring inter-individual response to HCA consumption. Results demonstrated that health status is a potentially important effect modifier as RCTs with higher baseline cholesterol, blood pressure and glycaemia demonstrated greater overall effectiveness, which was also found in studies where specific subgroup analyses were performed. Thus, the effect of HCAs on CM risk factors may be greater in individuals at higher CM risk, although future studies in these populations are needed, including those on other potential determinants of inter-individual variability. PROSPERO, registration number CRD42016050790.
- Published
- 2019
8. Meta-analysis of the effects of foods and derived products containing ellagitannins and anthocyanins on cardiometabolic biomarkers: analysis of factors influencing variability of the individual responses
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Garcia-Conessa, M., Chambers, K., Combet, E., Pinto, Paula, Garcia-Aloy, M., Andrés-Lacueva, C., Pascual-Teresa, S., Mena, P., Ristic, A., Hollands, W., Kroon, P., Rodríguez-Mateos, A., Istas, G., Kontogiorgis, C., Rai, D., Gibney, E., Morand, C., Espin, J., and González-Sarrías, A.
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meta-analysis ,cardiometabolic disorders ,pomegranate ,berries ,red grapes ,ellagitannins ,food and beverages ,nuts ,red wine ,interindividual variabilit ,anthocyanins - Abstract
Understanding interindividual variability in response to dietary polyphenols remains essential to elucidate their effects on cardiometabolic disease development. A meta-analysis of 128 randomized clinical trials was conducted to investigate the effects of berries and red grapes/wine as sources of anthocyanins and of nuts and pomegranate as sources of ellagitannins on a range of cardiometabolic risk biomarkers. The potential influence of various demographic and lifestyle factors on the variability in the response to these products were explored. Both anthocyanin-and ellagitannin-containing products reduced total-cholesterol with nuts and berries yielding more significant effects than pomegranate and grapes. Blood pressure was significantly reduced by the two main sources of anthocyanins, berries and red grapes/wine, whereas waist circumference, LDL-cholesterol, triglycerides, and glucose weremost significantly lowered by the ellagitannin-products, particularly nuts. Additionally, we found an indication of a small increase in HDL-cholesterol most significant with nuts and, in flow-mediated dilation by nuts and berries. Most of these effects were detected in obese/overweight people but we found limited or non-evidence in normoweight individuals or of the influence of sex or smoking status. The effects of other factors, i.e., habitual diet, health status or country where the study was conducted, were inconsistent and require further investigation. COST (European Cooperation in Science and Technology); COST Action "POSITIVe" info:eu-repo/semantics/publishedVersion
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- 2018
9. Design and synthesis of novel quinolinone-3-aminoamides and their alpha-lipoic acid adducts as antioxidant and antiiflammatory agents
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Detsi, A., Bouloumbasi, D., Prousis, K. C., Koufaki, Maria, Athanasellis, G., Melagraki, G., Afantitis, A., Igglessi-Markopoulou, O., Kontogiorgis, C., and Hadjipavlou-Litina, D. J.
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InformationSystems_INFORMATIONSTORAGEANDRETRIEVAL ,GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries) - Abstract
Journal URL: http://pubs.acs.org/journals/jmcmar/index.html
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- 2008
10. ChemInform Abstract: Curcumin Analogues as Possible anti‐Proliferative and Antiinflammatory Agents.
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Katsori, A.‐M., primary, Chatzopoulou, M., additional, Dimas, K., additional, Kontogiorgis, C., additional, Patsilinakos, A., additional, Trangas, T., additional, and Hadjipavlou‐Litina, D., additional
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- 2011
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11. Thromboxane Synthase Inhibitors and Thromboxane A2 Receptor Antagonists: A Quantitative Structure Activity Relationships (QSARs) Analysis
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Kontogiorgis, C., primary and Hadjipavlou-Litina, D., additional
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- 2010
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12. Composition and Antioxidant Activity of Olive Leaf Extracts from Greek Olive Cultivars
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Kiritsakis, Kostas, primary, Kontominas, M. G., additional, Kontogiorgis, C., additional, Hadjipavlou‐Litina, D., additional, Moustakas, A., additional, and Kiritsakis, A., additional
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- 2009
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13. Chalcones and their Potential Role in Inflammation
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Kontogiorgis, C., primary, Mantzanidou, M., additional, and Hadjipavlou-Litina, D., additional
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- 2008
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14. Antioxidant activity of olive leaves extracts from Greek cultivars
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Kiritsakis, K, primary, Kontogiorgis, C, additional, Hadjipavlou-Litina, D, additional, Moustakas, A, additional, and Kiritsakis, A, additional
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- 2008
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15. The Anti-inflammatory Effect of Coumarin and its Derivatives
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Hadjipavlou-Litina, D., primary, Litinas, K., additional, and Kontogiorgis, C., additional
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- 2007
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16. Matrix Metalloproteinase Inhibitors: A Review on Pharmacophore Mapping and (Q)Sars Results
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Kontogiorgis, C., primary, Papaioannou, P., additional, and Hadjipavlou-Litina, D., additional
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- 2005
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17. Non Steroidal Anti-Inflammatory and Anti-Allergy Agents
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Kontogiorgis, C., primary and Hadjipavlou-Litina, D., additional
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- 2002
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18. New lipoxygenase inhibitors of reactive oxygen species production in cellular models of amyloid (A2) toxicities.
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Pontiki E, Kontogiorgis C, Xu Y, Hadjipavlou-Litina D, and Luo Y
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- 2013
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19. Monitoring of Frequency and Antimicrobial Susceptibility of Pathogens on the Hands of Healthcare Workers in a Tertiary Hospital
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Tselebonis Athanasios, Nena Evangelia, Nikolaidis Christos, Konstantinidis Theocharis, Kontogiorgis Christos, Panopoulou Maria, and Constantinidis Theodore C.
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hospital hygiene ,hand samples ,drug resistance ,healthcare workers ,Medicine - Abstract
Objective: To monitor microbes, focusing on drug resistance, on the hands of the personnel of four departments of a tertiary hospital (ICU, neonatal unit, internal medicine ward and surgical ward) and explore differences between departments, professions and genders.
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- 2016
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20. Synthesis and Antiinflammatory Activity of Coumarin Derivatives<SUP>,</SUP>
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Kontogiorgis, C. A., Hadjipavlou-Litina, and J., D.
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The synthesis of several coumarin Mannich bases is described. The structures of the synthesized compounds were confirmed by spectral and elemental analysis. Their lipophilicity was determined experimentally by RPTLC method. All compounds were evaluated for their antiinflammatory and antioxidant activity and for their ability to inhibit in vitro lipoxygenase. The derivatives were found to present antioxidant and antiinflammatory activities. The tested derivatives inhibited carraggeenin-induced hind paw edema. They also significantly suppressed the arthritis induced by Freund's adjuvant. Compound
10 , the most active in vivo, was found to possess protective properties against adjuvant-induced arthritis in rats. The biological in vitro activities were concentration dependent. Hydrophilicity, the presence of a free 7-OH, and steric requirements for the substituent at position 8 are the most important factors in terms of SAR. An attempt was made to correlate several physicochemical properties of the molecules with their in vivo/in vitro activity.- Published
- 2005
21. Enzyme-triggered PEGylated siRNA-nanoparticles for controlled release of siRNA
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Yingyuad, P., Mével, M., Prata, C., Kontogiorgis, C., Thanou, M., and Andrew Miller
22. Overview of the European post-authorisation study register post-authorization studies performed in Europe from September 2010 to December 2018
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Janet, Sultana, Salvatore, Crisafulli, Mariana, Almas, Ippazio Cosimo, Antonazzo, Esme, Baan, Claudia, Bartolini, Maria Paola, Bertuccio, Fedele, Bonifazi, Annalisa, Capuano, Antonella, Didio, Vera, Ehrenstein, Mariagrazia, Felisi, Carmen, Ferrajolo, Andrea, Fontana, Remy, Francisca, Annie, Fourrier-Reglat, Joan, Fortuny, Rosa, Gini, Giulia, Hyeraci, Christel, Hoeve, Christos, Kontogiorgis, Valentina, Isgrò, Panagiotis-Nikolaos, Lalagkas, Luca, L'Abbate, Deborah, Layton, Annalisa, Landi, Silvia, Narduzzi, Leonardo, Roque Pereira, Georgios, Poulentzas, Concetta, Rafaniello, Giuseppe, Roberto, Giulia, Scondotto, Liberata, Sportiello, Maddalena, Toma, Massoud, Toussi, Katia, Verhamme, Elisabetta, Volpe, Gianluca, Trifirò, Sultana, Janet, Crisafulli, Salvatore, Almas, Mariana, Antonazzo, Ippazio Cosimo, Baan, Esme, Bartolini, Claudia, Bertuccio, Maria Paola, Bonifazi, Fedele, Capuano, Annalisa, Didio, Antonella, Ehrenstein, Vera, Felisi, Mariagrazia, Ferrajolo, Carmen, Fontana, Andrea, Francisca, Remy, Fourrier-Reglat, Annie, Fortuny, Joan, Gini, Rosa, Hyeraci, Giulia, Hoeve, Christel, Kontogiorgis, Christo, Isgrò, Valentina, Lalagkas, Panagiotis-Nikolao, L'Abbate, Luca, Layton, Deborah, Landi, Annalisa, Narduzzi, Silvia, Roque Pereira, Leonardo, Poulentzas, Georgio, Rafaniello, Concetta, Roberto, Giuseppe, Scondotto, Giulia, Sportiello, Liberata, Toma, Maddalena, Toussi, Massoud, Verhamme, Katia, Volpe, Elisabetta, Trifirò, Gianluca, Medical Informatics, Sultana, J, Crisafulli, S, Almas, M, Antonazzo, I, Baan, E, Bartolini, C, Bertuccio, M, Bonifazi, F, Capuano, A, Didio, A, Ehrenstein, V, Felisi, M, Ferrajolo, C, Fontana, A, Francisca, R, Fourrier-Reglat, A, Fortuny, J, Gini, R, Hyeraci, G, Hoeve, C, Kontogiorgis, C, Isgro, V, Lalagkas, P, L'Abbate, L, Layton, D, Landi, A, Narduzzi, S, Roque Pereira, L, Poulentzas, G, Rafaniello, C, Roberto, G, Scondotto, G, Sportiello, L, Toma, M, Toussi, M, Verhamme, K, Volpe, E, and Trifiro, G
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post-authorization studies ,Databases, Factual ,Epidemiology ,Pharmacoepidemiology ,Reproducibility of Result ,Reproducibility of Results ,post-authorization studie ,EU PAS register ,Observational Studies as Topic ,Research Design ,Surveys and Questionnaires ,multi-database studies ,Surveys and Questionnaire ,Humans ,Pharmacology (medical) ,multi-database studie ,Human - Abstract
Background: The European post-authorisation study (EU PAS) register is a repository launched in 2010 by the European Medicines Agency (EMA). All EMA-requested PAS, commonly observational studies, must be recorded in this register. Multi-database studies (MDS) leveraging secondary data have become an important strategy to conduct PAS in recent years, as reflected by the type of studies registered in the EU PAS register. Objectives: To analyse and describe PAS in the EU PAS register, with focus on MDS. Methods: Studies in the EU PAS register from inception to 31st December 2018 were described concerning transparency, regulatory obligations, scope, study type (e.g., observational study, clinical trial, survey, systematic review/meta-analysis), study design, type of data collection and target population. MDS were defined as studies conducted through secondary use of >1 data source not linked at patient-level. Data extraction was carried out independently by 14 centres with expertise in pharmacoepidemiology, using publicly available information in the EU PAS register including study protocol, whenever available, using a standardised data collection form. For validation purposes, a second revision of key fields for a 15% random sample of studies was carried out by a different centre. The inter-rater reliability (IRR) was then calculated. Finally, to identify predictors of primary data collection-based studies/versus those based on secondary use of healthcare databases) or MDS (vs. non-MDS), odds ratios (OR) and 95% confidence intervals (CI) were calculated fitting univariate logistic regression models. Results: Overall, 1426 studies were identified. Clinical trials (N = 30; 2%), systematic reviews/meta-analyses (N = 16; 1%) and miscellaneous study designs (N = 46; 3%) were much less common than observational studies (N = 1227; 86%). The protocol was available for 63% (N = 360) of 572 observational studies requested by a competent authority. Overall, 36% (N = 446) of observational studies were based fully or partially on primary data collection. Of 757 observational studies based on secondary use of data alone, 282 (37%) were MDS. Drug utilisation was significantly more common as a study scope in MDS compared to non-MDS studies. The overall percentage agreement among collaborating centres that collected the data concerning study variables was highest for study type (93.5%) and lowest for type of secondary data (67.8%). Conclusions: Observational studies were the most common type of studies in the EU PAS register, but 30% used primary data, which is more resource-intensive. Almost half of observational studies using secondary data were MDS. Data recording in the EU PAS register may be improved further, including more widespread availability of study protocols to improve transparency.
- Published
- 2021
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23. Improving Participant Recruitment in Clinical Trials: Comparative Analysis of Innovative Digital Platforms.
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Bikou AG, Deligianni E, Dermiki-Gkana F, Liappas N, Teriús-Padrón JG, Beltrán Jaunsarás ME, Cabrera-Umpiérrez MF, and Kontogiorgis C
- Subjects
- Humans, Artificial Intelligence, Blockchain, Clinical Trials as Topic methods, Patient Selection
- Abstract
Background: Pharmaceutical product development relies on thorough and costly clinical trials. Participant recruitment and monitoring can be challenging. The incorporation of cutting-edge technologies such as blockchain and artificial intelligence has revolutionized clinical research (particularly in the recruitment stage), enhanced secure data storage and analysis, and facilitated participant monitoring while protecting their personal information., Objective: This study aims to investigate the use of novel digital platforms and their features, such as e-recruitment, e-consent, and matching, aiming to optimize and expedite clinical research., Methods: A review with a systematic approach was conducted encompassing literature from January 2000 to October 2024. The MEDLINE, ScienceDirect, Scopus, and Google Scholar databases were examined thoroughly using a customized search string. Inclusion criteria focused on digital platforms involving clinical trial recruitment phases that were in English and had international presence, scientific validation, regulatory approval, and no geographic limitations. Literature reviews and unvalidated digital platforms were excluded. The selected studies underwent meticulous screening by the research team, ensuring a thorough analysis of novel digital platforms and their use and features for clinical trials., Results: A total of 24 digital platforms were identified that supported clinical trial recruitment phases. In general, most of them (n=22, 80%) are headquartered and operating in the United States, providing a range of functionalities including electronic consent (n=14, 60% of the platforms), participant matching, and monitoring of patients' health status. These supplementary features enhance the overall effectiveness of the platforms in facilitating the recruitment process for clinical trials. The analysis and digital platform findings refer to a specific time frame when the investigation took place, and a notable surge was observed in the adoption of these novel digital tools, particularly following the COVID-19 outbreak., Conclusions: This study underscores the vital role of the identified digital platforms in clinical trials, aiding in recruitment, enhancing patient engagement, accelerating procedures, and personalizing vital sign monitoring. Despite their impact, challenges in accessibility, compatibility, and transparency require careful consideration. Addressing these challenges is crucial for optimizing digital tool integration into clinical research, allowing researchers to harness the benefits while managing the associated risks effectively., (©Alexia Georgia Bikou, Elena Deligianni, Foteini Dermiki-Gkana, Nikolaos Liappas, José Gabriel Teriús-Padrón, Maria Eugenia Beltrán Jaunsarás, Maria Fernanda Cabrera-Umpiérrez, Christos Kontogiorgis. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 18.12.2024.)
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- 2024
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24. Impact of Regulatory Risk Communication on Thrombosis With Thrombocytopenia Syndrome for COVID-19 Adenovirus Vector Vaccines on European Healthcare Professionals.
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van Vliet E, Lipovec NČ, van der Goot M, Abtahi S, Ribeiro-Vaz I, Poplavska E, Dermiki-Gkana F, Oikonomou C, Deligianni E, Kontogiorgis C, Silva AM, Ferreira PBS, Kos M, Almarsdóttir AB, Jacobsen R, Buhl C, de Bruijn A, Hegger I, and Alves TL
- Subjects
- Humans, Europe epidemiology, Cross-Sectional Studies, Male, Thrombocytopenia epidemiology, Female, COVID-19 prevention & control, COVID-19 epidemiology, Thrombosis prevention & control, Thrombosis epidemiology, Thrombosis etiology, Middle Aged, Surveys and Questionnaires, Adult, Adenovirus Vaccines administration & dosage, Communication, COVID-19 Vaccines administration & dosage, Health Personnel statistics & numerical data, Health Knowledge, Attitudes, Practice
- Abstract
Purpose: The European Medicines Agency (EMA) issued regulatory actions and communications in 2021 on thrombosis with thrombocytopenia syndrome (TTS) associated with adenovirus vector vaccines Vaxzevria or Jcovden. This study aimed to evaluate the impact of these actions on awareness, knowledge and implementation in practises of healthcare professionals (HCP)., Methods: Web-based cross-sectional surveys were conducted on HCPs engaged in the vaccination, monitoring or counselling about the vaccines. We measured awareness and knowledge of the risk of TTS and their implementation of recommendations in practise. Descriptive and qualitative analyses were conducted. This study took place in Greece, Latvia, Netherlands, Portugal and Slovenia., Results: We surveyed 1659 HCPs. From these, 914 were included in the analysis. Most were aware about the reports of TTS associated with COVID-19 adenovirus vector vaccines, with countries reporting percentages between 85% and 97%. Mainstream media, health authorities and peers were the main sources of TTS risk information. Most HCPs were able to identify key symptoms from TTS but were less familiar with minor symptoms. Guidelines from health authorities on COVID-19 vaccination impacted on professional practise of 55%-77% of HCPs. The reported use of product information across countries was moderate, with some variations., Conclusions: Awareness about and knowledge of TTS risk from COVID-19 adenoviral vector vaccines were high among HCPs. HCPs reported a clear preference for national guidelines as source of risk information and the implementation of product information remained moderate across countries., (© 2024 The Author(s). Pharmacoepidemiology and Drug Safety published by John Wiley & Sons Ltd.)
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- 2024
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25. Challenges in the Implementation of EU Risk Minimisation Measures for Medicinal Products in Clinical Practice Guidelines: Mixed Methods Multi-Case Study.
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Møllebæk M, Gardarsdottir H, Bikou AG, Kodrič A, Silva AM, Andersen A, Kontogiorgis C, Poplavska E, Ahmadizar F, Dermiki-Gkana F, Rutkovska I, Vaz IR, Kos M, Barão P, Grupstra R, Alves TL, and Almarsdóttir AB
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Introduction: Risk minimisation measures (RMMs) aim to ensure safe use of medicines, but their implementation in clinical practice is complicated by the diversity of stakeholders whose clinical decision making they seek to inform. Clinical practice guidelines (CPGs) are considered integral in clinical decision making., Objectives: To determine the extent to which RMMs are included in the relevant CPGs and to describe factors that determine RMM inclusion., Methods: A multi-case study design using quantitative document analysis of CPGs combined with qualitative interviews with informants from organisations that issue CPGs. Cases from five therapeutic areas (TAs) with a regulatory requirement for further RMMs were studied individually in six EU member states (Denmark, Greece, Latvia, Netherlands, Portugal and Slovenia). Clinical practice guidelines were analysed using pre-defined coding frameworks. Interviewees were sampled purposively for experience and knowledge about CPG development and RMM inclusion. Verbatim interview transcripts were analysed inductively., Results: In total, 136 CPGs were analysed, and RMM information about TAs was included in 25% of CPGs. Based on 71 interviews we found that factors that determine RMM inclusion in CPGs include clinicians' low awareness of RMMs despite awareness of RMMs' safety concern, low expectation of RMMs' clinical utility, and unfamiliarity with pharmacovigilance data supporting RMMs and perceived incompatibility of CPGs' scope and purpose and RMM information., Conclusions: The inclusion of RMM information in relevant CPGs is remarkably limited. It may be explained by characteristics of CPGs and of RMMs as well as lack of connection between national regulators and organisations and authors developing CPGs. More collaboration between stakeholders, national regulators and the EMA may advance implementation., Competing Interests: Declarations. Funding: Open access funding provided by Copenhagen University. The research leading to these results was conducted as part of the activities of the EU PE&PV (Pharmacoepidemiology and Pharmacovigilance) Research Network, which is a public academic partnership coordinated by the Utrecht University, The Netherlands. The project has received support from the European Medicines Agency under the Framework service contract nr EMA/2020/46/TDA/L4.02. This document expresses the opinion of the authors of the paper, and may not be understood or quoted as being made on behalf of or reflecting the position of the European Medicines Agency or one of its committees or working parties. Conflict of Interest: FD; AB; CK; HG; ABA; AA; AMS; IRV; PB; AP; IR; RG; FA; TLA declare no competing interests. MM is employed by Copenhagen Centre for Regulatory Sciences (CORS). CORS is a cross-faculty university anchored institution involving various public (Danish Medicines Agency, Copenhagen University) and private (Novo Nordisk, Lundbeck, Ferring Pharmaceuticals, LEO Pharma) stakeholders as well as patient organisations (Rare Diseases Denmark). The Centre is purely devoted to the scientific aspects of the regulatory field and with a patient-oriented focus and the research is not company-specific product or directly company related. In the past 7 years, CORS has received funding from Novo Nordisk, Lundbeck, Ferring Pharmaceuticals and LEO Pharma for projects not related to this study. MK has research contracts with Krka, Vizera, Clinres and Pharmalinea with the aim of statistical analysis and a grant from AstraZeneca as support to developments of sustainability and resilience of the Slovenian healthcare system after the COVID-19 pandemic. AK has research contracts with Krka with the aim of statistical analysis. Ethics Approval: The study has been approved for ethics by relevant review boards in the EU, namely the Ethics Committee of the Faculty of Medicine of the University of Porto, Portugal (rapport no. 92/CEFMUP/2023); the Research Ethics Committee, Greece (no. 11328/51,21/10/2022.); Institutional Review Board, Faculty of Pharmacy, University of Ljubljana, Slovenia (UL FFA EMA IMPACT 20.10.2022). Ethics approval was not required for this study in Denmark (as per The Danish National Center For Ethics, see https://nationaltcenterforetik.dk/ansoegerguide/overblik/hvad-skal-jeg-anmelde ), the Netherlands (as per the Central Committee on Research Involving Human Subjects, see https://english.ccmo.nl/investigators/legal-framework-for-medical-scientific-research/your-research-is-it-subject-to-the-wmo-or-not ), and Latvia (as per the Latvian Association of Sociology, see http://sociologija.lv/etika-2/lsa-kodekss/ ). Consent to Participate: All interviewees received due information about the research project and submitted written informed consent forms about participation and citation prior to interviews. Processing of personal data complied with the EU General Data Protection Regulation. Consent for Publication: All interviewees received due information about the research project and submitted written informed consent forms about publication and citation prior to interviews. Processing of personal data complied with the EU General Data Protection Regulation. Availability of Data and Material: Data on organisations and clinical practice guidelines are available upon reasonable request. Please contact Helga Gardarsdottir (H.Gardarsdottir@uu.nl). Interview transcripts are not available. Code Availability: Not applicable. Author Contributions: The conceptualisation of the work was carried out by MM, HG, and ABA. The methodology was developed by MM, IRV, AMS, PB, HG, RG, EP, IR, AB, CK, FD, TLA, FA, and MK. Formal analysis and investigation were conducted by MM, AA, AK, IRV, AMS, PB, HG, RG, EP, IR, AB, CK, FD, and MK. The original draft preparation was done solely by MM. Writing review and editing were performed by MM, AA, AK, IRV, AMS, PB, HG, RG, EP, IR, AB, CK, FD, TLA, FA, and MK. Funding acquisition was managed by MM, HG, and TLA while supervision of the project was overseen by MM and HG. Project administration was handled by HG with visualisations created by RG. All authors have read and approved the final manuscript., (© 2024. The Author(s).)
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- 2024
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26. Occupational burnout and job satisfaction among community pharmacists.
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Katsogiannis I, Manara E, Peletidi A, Bistaraki A, Constantinides T, and Kontogiorgis C
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Introduction: Community pharmacists (CPs) are the most accessible healthcare professionals in primary care due to pharmacies' open-door policy and convenience, resulting in high patient and prescription volumes, and numerous free-of-charge consultations. Therefore, they are at high risk for burnout., Objectives: The primary objective of this study was to assess the levels of burnout among community pharmacists in Greece, marking the first investigation of its kind within the country. Additionally, this study aimed to explore potential correlations between demographic variables and other health-related factors with burnout scores ., Methods: This study used a quantitative cross-sectional design involving two validated questionnaires(the Greek version of Maslach (MBI) questionnaire and the SF-36 questionnaire). Prior to data collection, all the relevant documentation was approved by the Metropolitan College Research Ethics Committee and was adopted under the auspices of the Panhellenic Pharmaceutical Association. Random sampling was used. Data collection period was July to August 2022., Results: A total of 368 responses were included in the analysis, with the majority being pharmacy-owners ( n = 292, 79.3%). Notably, a significant proportion of respondents were female practitioners working within community pharmacy settings ( n = 230, 62.5%). Analysis revealed that the sample exhibited low levels of personal achievement (M = 30.99, SD = 6.41), high levels of emotional exhaustion (M = 41.73, SD = 6.94), and moderate levels of depersonalization (M = 23.38, SD = 3.78), indicative of substantial occupational burnout. Furthermore, gender had a discernible impact on depersonalization, with women scoring higher than men ( t = -3.29, p < 0.01). Pharmacists who identified medicine shortages as their primary challenge in daily practice reported lower emotional burnout and depersonalization, albeit with a diminished sense of accomplishment ( t = -2.62, p < 0.01 ) ., Conclusions: This study sheds light on burnout levels and health-related quality of life among community pharmacists in Greece., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Authors.)
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- 2024
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27. A systematic review of the effect of semaglutide on lean mass: insights from clinical trials.
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Bikou A, Dermiki-Gkana F, Penteris M, Constantinides TK, and Kontogiorgis C
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- Humans, Anti-Obesity Agents therapeutic use, Anti-Obesity Agents pharmacology, Diabetes Mellitus, Type 2 drug therapy, Glucagon-Like Peptide-1 Receptor Agonists, Glucagon-Like Peptides therapeutic use, Glucagon-Like Peptides pharmacology, Weight Loss drug effects, Obesity drug therapy, Randomized Controlled Trials as Topic, Overweight drug therapy
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Introduction: Semaglutide, a glucagon-like peptide-1 receptor agonist, is associated with significant weight loss, yet its impact on lean body mass remains insufficiently understood. This review investigates the effect of semaglutide on lean mass in the context of obesity management., Methodology: This study investigates through different databases (PubMed, Elsevier, and Google Scholar) from 2016 for randomized control trials (RCTs) or observational studies that assessed the use of semaglutide in overweight or obese patients, regardless of whether they have type 2 diabetes or not. The studies compared semaglutide to a placebo or alternative medications., Results: Six studies with 1,541 overweight or obese adults were included, and significant weight reductions were observed primarily due to fat mass loss. While the lean mass remained stable in some cases, notable reductions ranging from almost 0% to 40% of total weight reduction were observed in others. Noteworthy decreases in lean mass were particularly evident in larger trials, yet the proportion of lean mass relative to total body mass increased, suggesting a positive overall outcome., Conclusion: Semaglutide displays potential for weight loss primarily through fat mass reduction. However, concerns arise from notable reductions in lean mass, especially in trials with a larger number of patients.
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- 2024
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28. Nutritional interventional studies in patients with multiple sclerosis: a scoping review of the current clinical evidence.
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Tryfonos C, Chrysafi M, Vadikolias K, Berberoglou L, Vorvolakos T, Dimoliani S, Tsourouflis G, Kontogiorgis C, Antasouras G, and Giaginis C
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- Humans, Disease Progression, Randomized Controlled Trials as Topic, Multiple Sclerosis drug therapy
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A good nutritional status appears to slow down disease progression and ameliorate symptoms' intensity in patients with multiple sclerosis (MS). Up to date, there are several interventional studies, which have explored the potential beneficial effects of specific dietary patterns as well as specific bioactive nutrients against disease progression and symptomatology of MS patients. This is a thorough, scoping review, which aims to critically summarize and scrutinize the currently available clinical evidence of the potential beneficial effects of nutritional interventional studies against MS progression and symptomatology. This review was conducted to systematically map the research done in this area, as well as to identify gaps in knowledge. For this purpose, we thoroughly explored the most accurate scientific web databases, e.g., PubMed, Scopus, Web of Science, and Google Scholar to achieve the most relevant clinical human studies applying effective and characteristic keywords. There are currently several dietary patterns and specific bioactive nutrients that show promising results by slowing down disease progression and by improving MS symptoms. However, there are also certain conflicting results, while most of the existing studies enrolled a small number of MS patients. Nutritional interventions may exert substantial protective effects against MS progression and symptomatology. However, large, long-term, randomized, double-blind, controlled clinical trials with a prospective design are strongly recommended to delineate whether such nutritional intervention may attenuate disease progression, and improve symptomatology in MS patients., (© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany.)
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- 2024
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29. Assessment of quality of life, job insecurity and work ability among nurses, working either under temporary or permanent terms.
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Katsaouni M, Tripsianis G, Constantinidis T, Vadikolias K, Kontogiorgis C, Serdari A, Arvaniti A, Theodorou E, and Nena E
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- Humans, Female, Male, Cross-Sectional Studies, Work Capacity Evaluation, Employment psychology, Job Satisfaction, Workplace psychology, Surveys and Questionnaires, Quality of Life, Job Security
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Objectives: Aim of this study was to assess and compare health, quality of life, well-being, job satisfaction and job insecurity between nurses, in a tertiary hospital in Greece, working either under permanent or temporary contract., Material and Methods: In this cross-sectional study, consecutively recruited nurses answered a structured questionnaire, the WHO-5 Well-being Index (WHO-5), the Job Insecurity Index (JII), the Work Ability Index (WAI), and the Well-Being at Work Scale (WBWS)., Results: Included were 323 nurses (87.6% women, age M±SD 43.68±8.10 years). Tem- porary contract employees had worse quality of life (p = 0.009) and higher job insecurity: both in cognitive dimension (p = 0.013) and emotional dimension (p < 0.001). They also scored worse in the positive affect (p < 0.001), negative affect (p = 0.002) and fulfillment of expectations in work environment (p < 0.001) domains of the WBWS. Additionally, they reported less frequently occupational accidents and injuries (p = 0.001), muscu - loskeletal disorders of the spine or neck (p = 0.007), cardiovascular (p = 0.017), and gastrointestinal (p = 0.010) disorders, while they reported more frequently mental disorders (p < 0.001). Multivariate linear regression analysis showed that temporary work predicted high cognitive (p = 0.010) and emotional (p < 0.001) insecurity, low positive emotions and mood index (p = 0.007), low achievement-fulfillment index (p = 0.047) and high index of negative emotions (p = 0.006), regardless of gender and age., Conclusions: Temporary employment among nurses is associated with a lower sense of job security and well-being, and a higher prevalence of mental disorders, independently of age or gender without a significantly negative effect on their ability to work. Managers, as well as occupational physicians, should recognize the extent of nurses' job insecurity and assess their ability to work, to provide them with the necessary support and to stimulate the sense of occupational security and work capacity, so that they can thrive in their workplace and therefore be more productive and provide high quality healthcare. Int J Occup Med Environ Health. 2024;37(1):98-109., (This work is available in Open Access model and licensed under a CC BY-NC 3.0 PL license.)
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- 2024
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30. Public's perspective on COVID-19 adenovirus vector vaccines after thrombosis with thrombocytopenia syndrome (TTS) reports and associated regulatory actions - A cross-sectional study in six EU member states.
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Buhl C, Jacobsen R, Almarsdóttir AB, Abtahi S, Andersen A, Deligianni E, Dermiki-Gkana F, Kontogiorgis C, Oikonomou C, Kursite M, Poplavska E, Hegger I, van der Goot M, Sousa Ferreira PB, Ribeiro-Vaz I, Silva AM, Kos M, Lipovec NČ, van Vliet E, and Alves TL
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- Humans, COVID-19 Vaccines, Cross-Sectional Studies, ChAdOx1 nCoV-19, Vaccination, Adenoviridae genetics, COVID-19 prevention & control, Thrombocytopenia, Thrombosis
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Objective: In 2021, thrombosis with thrombocytopenia syndrome (TTS) was confirmed by the European Medicines Agency (EMA) as a rare side effect of the COVID-19 adenovirus vector vaccines Vaxzevria® and Jcovden®. This study aimed to describe the public's knowledge of TTS and how it affected the willingness to be vaccinated with COVID-19 vaccines and other vaccines in six European countries., Methods: From June to October of 2022, a multi-country cross-sectional online survey was conducted in Denmark, Greece, Latvia, Netherlands, Portugal, and Slovenia. The minimum target of participants to be recruited was based on the size of the country's population. The results were analysed descriptively., Results: In total, 3794 respondents were included in the analysis; across the six countries, 33.3 %-68.3 % reported being familiar with signs and symptoms of TTS, although 3.1-61.4 % of those were able to identify the symptoms correctly. The reported changes in willingness to be vaccinated against COVID-19 and with other vaccines varied per country. The largest reported change in the willingness to be vaccinated with Vaxzevria® and Jcovden® was observed in Denmark (61.2 %), while the willingness to be vaccinated with other COVID-19 vaccines changed most in Slovenia (30.4 %). The smallest decrease in willingness towards future vaccination against COVID-19 was reported in the Netherlands (20.9 %) contrasting with the largest decrease observed in Latvia (69.1 %)., Conclusion: Knowledge about TTS seemed to have influenced the public's opinion in Europe resulting in less willingness to be vaccinated with Vaxzevria® and Jcovden®. Willingness for vaccination against COVID-19 with other vaccines and widespread use of vaccines to prevent other diseases also differed and seemed to be determined by the approaches taken by national health authorities when reacting to and communicating about COVID-19 vaccination risks. Further investigation of optimal risk communication strategies is warranted., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Teresa Leonardo Alves reports financial support was provided by European Medicines Agency., (Copyright © 2023 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
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- 2024
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31. Does the Simultaneous Introduction of Several Pharmaceuticals in the Post-Lenalidomide Era Translate to Better Outcomes in Relapse Refractory Multiple Myeloma? Findings from the Real-World Innovation in Multiple Myeloma (REAL IMM) Study.
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Petrakis I, Kontogiorgis C, Nena E, Delimpasi S, Loutsidi NE, Spanoudakis E, Intzes S, Misidou C, Symeonidou M, Giannakoulas N, Constantinidis TC, and Terpos E
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Newer methodologies are needed to assess the real-world comparative effectiveness of a "generation" of pharmaceutical innovation versus the prior standard of care. This chart review study aimed to first evaluate the cumulative clinical benefits of pharmaceutical innovation in everyday relapse/refractory multiple myeloma before analyzing findings in the context of respective real-world outcomes from the bortezomib/lenalidomide era. Study endpoints included the 52-week PFS rate in second and third line of therapy (LOT), mPFS-2 across the first and second LOT, the ORR, reasons for discontinuation, and the treatment duration per therapeutic algorithm. Data from 107 patients were collected. The median follow-up was 2.0 years. Of the subjects who met the selection criteria for the second LOT, 72.2% maintained the PFS at 52 weeks. In the third-line setting, the PFS rate at 52 weeks was 63.5%. The mPFS across the first and second, the second, and the third LOTs were 26, 17, and 15 months, respectively. The ORR was 76.1% in the second and 69.7% in the third LOT. After non-response or progression, the main reason for drug discontinuation was treatment intolerability. The second-line ORR and the 52-week PFS rate were similar to previous real-world findings from the bortezomib/lenalidomide era. The cumulative mPFS across the second and third LOTs was higher than the respective mPFS across the first and second LOTs. Despite its limitations, the methodology and findings from this study may be used in future clinical and economic evaluations across all hematological malignancies.
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- 2023
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32. Exploring public knowledge and perceptions regarding per os OTC pain-relieving medications: the case of paracetamol (acetaminophen).
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Petrides M, Peletidi A, Petrou C, Nena E, Papavasili M, Constantinidis T, and Kontogiorgis C
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Background: Over-the-counter medications (OTC) are safe and effective when patients follow the patient's information leaflet (PIL) instructions and/or the instructions given by healthcare professionals (HCPs). However, OTC medications could be harmful and unsafe when individuals do not follow the given instructions and/or when their understanding about the proper use of OTC medications is incorrect. This study aimed to investigate the knowledge and perceptions of people regarding paracetamol use in the Republic of Cyprus., Methods: This cross-sectional study, which belongs to quantitative research methods, included participants visiting community pharmacies in the following three cities of the Republic of Cyprus: Nicosia, Limassol and Larnaca. Participation in the study was voluntary and anonymous. Participants responded to the survey-based questionnaire, which concerned their knowledge and views on paracetamol use. After the data collection, responses were tabulated and analysed statistically., Results: The original compound was shown to be more well-known compared to generics. A notable percentage of respondents-ranging between 13.0% (N = 49) and 29.8% (N = 112)-answered incorrectly that broadly used non-steroidal anti-inflammatory drugs (NSAIDs) contain paracetamol. Furthermore, a remarkable percentage of respondents (71.5%, N = 269 and 50.3%, N = 189, respectively) falsely believed that two widely used combination products in the market of Cyprus (Paracetamol and Hyoscine-N-butylbromide; Paracetamol and Codeine and Caffeine) did not contain paracetamol. A notable percentage of participants (27.6%, N = 100) believed that paracetamol causes low toxicity. More than a third of the respondents (40.2%, N = 149) drink alcohol together with or slightly after consuming paracetamol products. This viewpoint was linked with the participants' attitude towards consuming paracetamol medications after drinking alcohol (OR for consuming alcohol versus not consuming alcohol 0.100, 95% CI 0.044-0.225, p = 0.000)., Conclusions: To the best of our knowledge, this is the first study conducted in the Republic of Cyprus on this topic. Paracetamol is frequently consumed by individuals, both in its generic and original forms. However, the study showed that respondents often misperceive NSAIDs and paracetamol-containing medications. In addition, it is identified that there is a lack of education among people about the safe and effective use of paracetamol, namely, indications, potential side effects, maximum daily dose, alcohol consumption, and the potential risks of hepatotoxicity. The study contributed to the current published literature as it showed that there is a significant public health issue, for which appropriate measures can be established by the respective Authorities of Cyprus., (© 2023. The Author(s).)
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- 2023
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33. Sentiment analysis of epidemiological surveillance reports on COVID-19 in Greece using machine learning models.
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Stefanis C, Giorgi E, Kalentzis K, Tselemponis A, Nena E, Tsigalou C, Kontogiorgis C, Kourkoutas Y, Chatzak E, Dokas I, Constantinidis T, and Bezirtzoglou E
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- Humans, Greece epidemiology, Bayes Theorem, Pandemics, Sentiment Analysis, Machine Learning, COVID-19 epidemiology
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The present research deals with sentiment analysis performed with Microsoft Azure Machine Learning Studio to classify Facebook posts on the Greek National Public Health Organization (EODY) from November 2021 to January 2022 during the pandemic. Positive, negative and neutral sentiments were included after processing 300 reviews. This approach involved analyzing the words appearing in the comments and exploring the sentiments related to daily surveillance reports of COVID-19 published on the EODY Facebook page. Moreover, machine learning algorithms were implemented to predict the classification of sentiments. This research assesses the efficiency of a few popular machine learning models, which is one of the initial efforts in Greece in this domain. People have negative sentiments toward COVID surveillance reports. Words with the highest frequency of occurrence include government, vaccinated people, unvaccinated, telephone communication, health measures, virus, COVID-19 rapid/molecular tests, and of course, COVID-19. The experimental results disclose additionally that two classifiers, namely two class Neural Network and two class Bayes Point Machine, achieved high sentiment analysis accuracy and F1 score, particularly 87% and over 35%. A significant limitation of this study may be the need for more comparison with other research attempts that identified the sentiments of the EODY surveillance reports of COVID in Greece. Machine learning models can provide critical information combating public health hazards and enrich communication strategies and proactive actions in public health issues and opinion management during the COVID-19 pandemic., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Stefanis, Giorgi, Kalentzis, Tselemponis, Nena, Tsigalou, Kontogiorgis, Kourkoutas, Chatzak, Dokas, Constantinidis and Bezirtzoglou.)
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- 2023
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34. Coastal Water Quality Modelling Using E. coli , Meteorological Parameters and Machine Learning Algorithms.
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Tselemponis A, Stefanis C, Giorgi E, Kalmpourtzi A, Olmpasalis I, Tselemponis A, Adam M, Kontogiorgis C, Dokas IM, Bezirtzoglou E, and Constantinidis TC
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- Bayes Theorem, Algorithms, Machine Learning, Water Quality, Escherichia coli
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In this study, machine learning models were implemented to predict the classification of coastal waters in the region of Eastern Macedonia and Thrace (EMT) concerning Escherichia coli ( E. coli ) concentration and weather variables in the framework of the Directive 2006/7/EC. Six sampling stations of EMT, located on beaches of the regional units of Kavala, Xanthi, Rhodopi, Evros, Thasos and Samothraki, were selected. All 1039 samples were collected from May to September within a 14-year follow-up period (2009-2021). The weather parameters were acquired from nearby meteorological stations. The samples were analysed according to the ISO 9308-1 for the detection and the enumeration of E. coli . The vast majority of the samples fall into category 1 (Excellent), which is a mark of the high quality of the coastal waters of EMT. The experimental results disclose, additionally, that two-class classifiers, namely Decision Forest, Decision Jungle and Boosted Decision Tree, achieved high Accuracy scores over 99%. In addition, comparing our performance metrics with those of other researchers, diversity is observed in using algorithms for water quality prediction, with algorithms such as Decision Tree, Artificial Neural Networks and Bayesian Belief Networks demonstrating satisfactory results. Machine learning approaches can provide critical information about the dynamic of E. coli contamination and, concurrently, consider the meteorological parameters for coastal waters classification.
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- 2023
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35. Novel Pyrimidine Derivatives as Antioxidant and Anticancer Agents: Design, Synthesis and Molecular Modeling Studies.
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Myriagkou M, Papakonstantinou E, Deligiannidou GE, Patsilinakos A, Kontogiorgis C, and Pontiki E
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- Structure-Activity Relationship, Pyrimidines chemistry, Glutathione pharmacology, Molecular Structure, Drug Screening Assays, Antitumor, Molecular Docking Simulation, Cell Proliferation, Cell Line, Tumor, Antioxidants chemistry, Antineoplastic Agents chemistry
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The heterocyclic ring system of pyrido [2,3- d ]pyrimidines is a privileged scaffold in medicinal chemistry, possessing several biological activities. The synthesis of the pyrimidine derivatives was performed via the condensation of a suitable α,β -unsaturated ketone with 4-amino-6-hydroxy-2-mercaptopyrimidine monohydrate in glacial acetic acid. Chalcones were synthesized, as starting materials, via the Claisen-Schmidt condensation of an appropriately substituted ketone and an appropriately substituted aldehyde in the presence of aqueous KOH 40% w/v in ethanol. All the synthesized compounds were characterized using IR,
1 H-NMR,13 C-NMR, LC-MS and elemental analysis. The synthesized compounds were evaluated for their antioxidant (DPPH assay), anti-lipid peroxidation (AAPH), anti-LOX activities and ability to interact with glutathione. The compounds do not interact significantly with DPPH but strongly inhibit lipid peroxidation. Pyrimidine derivatives 2a (IC50 = 42 μΜ), 2f (IC50 = 47.5 μΜ) and chalcone 1g (IC50 = 17 μM) were the most potent lipoxygenase inhibitors. All the tested compounds were found to interact with glutathione, apart from 1h. Cell viability and cytotoxicity assays were performed with the HaCaT and A549 cell lines, respectively. In the MTT assay towards the HaCaT cell line, none of the compounds presented viability at 100 μM. On the contrary, in the MTT assay towards the A549 cell line, the tested compounds showed strong cytotoxicity at 100 μM, with derivative 2d presenting the strongest cytotoxic effects at the concentration of 50 μΜ.- Published
- 2023
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36. Mediterranean Diet Adherence Is Associated with Favorable Health-Related Quality of Life, Physical Activity, and Sleep Quality in a Community-Dwelling Greek Older Population.
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Mantzorou M, Mentzelou M, Vasios GK, Kontogiorgis C, Antasouras G, Vadikolias K, Psara E, Vorvolakos T, Poulios E, Serdari A, Papadopoulou SK, and Giaginis C
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Background: The Mediterranean diet (MD) is a beneficial dietary pattern with strong antioxidant and anti-inflammatory properties that can promote mental and physical human health. This study aims to assess the impact of MD adherence on health-related quality of life, physical activity levels, and sleep quality in a representative Greek elderly population., Methods: This is a cross-sectional study. A total of 3254 persons ≥65 years from 14 different Greek regions, urban, rural and islands participated in this study, of which 48.4% were female and 51.6% were male. Health-Related Quality of Life (HRQOL) was evaluated utilizing a short form healthy survey, physical activity was determined by the International Physical Activity Questionnaire (IPAQ), sleep quality was assessed utilizing the Pittsburgh Sleep Quality Index (PSQI) and MD adherence was assessed via the Mediterranean Diet Score (MedDietScore)., Results: Moderate adherence to the MD and an increased prevalence of poor quality of life, low physical activity levels and inadequate sleep quality among the elderly population were recorded. High MD adherence was independently associated with better quality of life (OR: 2.31, 95% CI: 2.06-2.68, p = 0.0008), higher physical activity (OR: 1.89, 95% CI: 1.47-2.35, p = 0.0141) and adequate sleep quality (OR: 2.11, 95%: 1.79-2.44, p = 0.0018), female sex (OR: 1.36, 95% CI: 1.02-1.68, p = 0.0032) and living with others (OR: 1.24, 95% CI: 0.81-1.76, p = 0.0375), after adjustment for potential confounding factors. In unadjusted analysis, participants' age ( p < 0.0001), anthropometric characteristics ( p < 0.005), educational ( p = 0.0026) and financial status ( p = 0.0005) and smoking habits ( p = 0.0031) were also identified as indicators of MD adherence; however, their impact on MD adherence was considerably attenuated after adjusting for confounding factors ( p > 0.05)., Conclusion: High MD adherence was correlated with favorable quality of life, higher levels of physical activity, and a more adequate sleep quality score. Strategies and public health policies that facilitate MD adherence and physical activity in older adults may improve sleep and quality of life, impacting overall wellbeing in this age group.
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- 2023
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37. How to improve food waste management in hospitals through focussing on the four most common measures for reducing plate waste.
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Antasouras G, Vasios GK, Kontogiorgis C, Ioannou Z, Poulios E, Deligiannidou GE, Troumbis AY, and Giaginis C
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- Humans, Food, Hospitals, Multicenter Studies as Topic, Food Service, Hospital, Refuse Disposal, Waste Management
- Abstract
Hospitals have a responsibility to link human health and the environment, but food waste in hospitals has traditionally been much higher than in other areas of food supply. The cause of this situation has many negative impacts on health, economy, society, and environment. As a result, food waste has become a topic of discussion in hospital food departments. Part of this problem is plate waste, the served food that remains uneaten by patients. Given the magnitude of the food problem, this systematic review is aimed to identify the most common measures used to reduce plate waste in hospitals. PubMed, Scopus, and Google Scholar databases were comprehensively searched to identify food waste studies worldwide using related search terms. Many approaches have been recommended to increase patient food intake and minimise plate waste in hospitals. Up to date, the four most common include flexible portion sizes, increased food choices through selective menus, additional nutritional support and a better ordering and delivery system. Among them, the most used and effective are flexible portion sizes which may increase the ability of patients choosing their menus and upgrade ordering and delivery system by electronic format. In most studies, plate waste covers the most significant percentage of food waste produced in hospitals, while more than one approach is recommended to minimise it. In this aspect, further well-design, multicenter, clinical studies are strongly required to highlight and establish novel and effective approaches for improving food waste management in hospitals by reducing plate waste., (© 2022 John Wiley & Sons Ltd.)
- Published
- 2023
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38. Prevalence of pharmacologically treated type 2 diabetes mellitus in 2012-2016 in Greece: Real-World Data.
- Author
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Lalagkas PN, Polyzois S, Papanas N, Nena E, Vourli N, Kontogiorgis C, and Constantinides T
- Subjects
- Greece epidemiology, Humans, Prevalence, Diabetes Mellitus, Type 2 diagnosis, Diabetes Mellitus, Type 2 drug therapy, Diabetes Mellitus, Type 2 epidemiology
- Abstract
Type 2 diabetes mellitus is a serious health disorder with a global prevalence of 6059 cases per 100,000 in 2017. By analyzing real-world data, our study found an increasing prevalence of type 2 diabetes in Greece, with the peak being 7,40 individuals per 100,000 in 2016., Competing Interests: Declaration of interest None., (Copyright © 2022 Primary Care Diabetes Europe. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2022
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39. Systematic analysis of nutrigenomic effects of polyphenols related to cardiometabolic health in humans - Evidence from untargeted mRNA and miRNA studies.
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Ruskovska T, Budić-Leto I, Corral-Jara KF, Ajdžanović V, Arola-Arnal A, Bravo FI, Deligiannidou GE, Havlik J, Janeva M, Kistanova E, Kontogiorgis C, Krga I, Massaro M, Miler M, Harnafi H, Milosevic V, Morand C, Scoditti E, Suárez M, Vauzour D, and Milenkovic D
- Subjects
- Humans, Nutrigenomics, Polyphenols pharmacology, RNA, Messenger genetics, Cardiovascular Diseases genetics, Cardiovascular Diseases prevention & control, MicroRNAs genetics, MicroRNAs metabolism
- Abstract
Cardiovascular and metabolic disorders present major causes of mortality in the ageing population. Polyphenols present in human diets possess cardiometabolic protective properties, however their underlying molecular mechanisms in humans are still not well identified. Even though preclinical and in vitro studies advocate that these bioactives can modulate gene expression, most studies were performed using targeted approaches. With the objective to decipher the molecular mechanisms underlying polyphenols cardiometabolic preventive properties in humans, we performed integrative multi-omic bioinformatic analyses of published studies which reported improvements of cardiometabolic risk factors following polyphenol intake, together with genomic analyses performed using untargeted approach. We identified 5 studies within our criteria and nearly 5000 differentially expressed genes, both mRNAs and miRNAs, in peripheral blood cells. Integrative bioinformatic analyses (e.g. pathway and gene network analyses, identification of transcription factors, correlation of gene expression profiles with those associated with diseases and drug intake) revealed that these genes are involved in the processes such as cell adhesion and mobility, immune system, metabolism, or cell signaling. We also identified 27 miRNAs known to regulate processes such as cell cytoskeleton, chemotaxis, cell signaling, or cell metabolism. Gene expression profiles negatively correlated with expression profiles of cardiovascular disease patients, while a positive correlation was observed with gene expression profiles following intake of drugs against cardiometabolic disorders. These analyses further advocate for health protective effects of these bioactives against age-associated diseases. In conclusion, polyphenols can exert multi-genomic modifications in humans and use of untargeted methods coupled with bioinformatic analyses represent the best approach to decipher molecular mechanisms underlying healthy-ageing effects of these bioactives., (Copyright © 2022 Elsevier B.V. All rights reserved.)
- Published
- 2022
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40. A Landscape Analysis of Post-Marketing Studies Registered in the EU PAS Register and ClinicalTrials.gov Focusing on Pregnancy Outcomes or Breastfeeding Effects: A Contribution from the ConcePTION Project.
- Author
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Roque Pereira L, Durán CE, Layton D, Poulentzas G, Lalagkas PN, Kontogiorgis C, and Sturkenboom M
- Subjects
- Female, Humans, Marketing, Pregnancy, Breast Feeding, Pregnancy Outcome
- Abstract
Introduction: A large proportion of medicine product labels lack information on safety in pregnancy and breastfeeding. To address this gap, pharmaceutical companies are requested to develop post-approval studies regarding the use of drugs by pregnant and breastfeeding women., Objective: Our study aims to review key features of observational studies in pregnancy and breastfeeding and their impact on the respective medicine product labels., Methods: Observational studies focusing on the safety evaluation of medicines used during pregnancy and breastfeeding were selected from the European Union Register of Post-Authorization Studies (EU PAS register) and ClinicalTrials.gov. We extracted information on the variables of interest and performed an impact assessment on the respective label., Results: A total of 141 observational studies were eligible. Of these, 63 studies (45%) were based on primary data collection and 55 studies (39%) on secondary use of health data. A small number of studies (8%) aimed to evaluate drug safety during breastfeeding. Studies using secondary data collection lasted around 2.9 years as opposed to 7.5 years' duration for studies using primary data collection. Only two product labels were updated based on the study results., Conclusion: The duration is significantly longer for studies based on primary data collection, and these are also smaller in size (less power), whereas outcomes of interest are similar. For completed studies, the impact on the label was very low. Given the gap in adequate pregnancy information on product labels, the current process of generating evidence in pregnancy and breastfeeding seems neither efficient nor impactful. To support evidence-based decision making by prescribers, this current process might be redesigned., (© 2022. The Author(s).)
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- 2022
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41. Correction to: A Landscape Analysis of Post-Marketing Studies Registered in the EU PAS Register and ClinicalTrials.gov Focusing on Pregnancy Outcomes or Breastfeeding Effects: A Contribution from the ConcePTION Project.
- Author
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Pereira LR, Durán CE, Layton D, Poulentzas G, Lalagkas PN, Kontogiorgis C, and Sturkenboom M
- Published
- 2022
- Full Text
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42. Community Attitudes and Habits Toward Over-The-Counter Drugs: Results of a Study Conducted in Thessaloniki, Greece.
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Lalagkas PN, Poulentzas G, Takaviti A, Toursidou Z, Tatsiou T, Hadjipavlou-Litina D, Wettermark B, Kontogiorgis C, and Constantinides T
- Subjects
- Attitude, Cross-Sectional Studies, Female, Greece, Habits, Humans, Middle Aged, Nonprescription Drugs therapeutic use, Pharmacists
- Abstract
Objectives: To determine the frequency of use, sources of information, and selection criteria of Greek residents regarding over-the-counter (OTC) drugs, as well as their opinion about their dispensing in nonpharmacy settings., Methods: This was a survey study in which an anonymous cross-sectional questionnaire was used to assess the knowledge, habits, and attitudes about OTC drugs. Data were collected from March 2017 to July 2017 in Thessaloniki, the second largest city in Greece. Logistic regression was used to investigate significant factors that affect the participants' behavior., Results: A total of 782 participants completed the questionnaire. The population had a mean (SD) age of 46 (17) years and 55.1% were females. About one-third (32.5%) of the participants used nonsteroidal anti-inflammatory drugs more than once per week. OTC drugs acting on the gastrointestinal tract were used to a lower extent (13.2%). The majority (84%) of the respondents consult a healthcare professional about the information on OTC drugs. Furthermore, when not sure about which OTC drug to use, 510 participants (65.6%) valued their physician's advice, whereas 480 participants (60.2%) valued their pharmacist's advice. Most participants (61.2%) were negatively inclined toward the purchase of OTC drugs in nonpharmacy settings, with younger participants being more receptive to out-of-pharmacy OTC drug purchase than older ones (odds ratio 2.20; 95% confidence interval 1.37-3.54)., Conclusions: Healthcare professionals play an important role in providing people information on their selection of OTC drugs. This could be the main reason why participants prefer to buy OTC drugs from community pharmacies rather than retail shops., (Copyright © 2021 ISPOR--The professional society for health economics and outcomes research. Published by Elsevier Inc. All rights reserved.)
- Published
- 2022
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43. Investigating Potential Drug-Drug Interactions from Greek e-Prescription Data.
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Lalagkas PN, Poulentzas G, Tsiolis L, Berberoglou E, Hadjipavlou-Litina D, Douros A, Kontogiorgis C, and Constantinides T
- Subjects
- Drug Interactions, Greece epidemiology, Humans, Polypharmacy, Prevalence, Electronic Prescribing
- Abstract
Background: The prevalence of potential drug-drug interactions (pDDIs) is indicative of the prevalence of actual drug-drug interactions and prescription quality. However, they are significantly understudied in Greece., Objective: The objective of the study was to determine the prevalence of pDDIs among outpatients and identify factors associated with their occurrence., Methods: Anonymous e-prescription data between 2012 and 2017 were obtained from community pharmacies in Thessaloniki, Greece. Patients taking more than one medication for at least three months were included. pDDIs were identified and categorized depending on their clinical significance using Drug Interactions Checker. Crude and adjusted odds ratios (ORs) with accompanying 95% confidence intervals (CIs) of risk factors of pDDIs occurrence were identified using multivariable logistic regression., Results: During the study period, 6,000 anonymous e-prescriptions (1,000 per year) satisfying the inclusion criteria were collected. The overall prevalence of major pDDIs was 17.4% (63.0% for moderate pDDIs). The most common major pDDIs were between amlodipine and simvastatin (22.8% of major interactions), followed by clopidogrel and omeprazole (6.4% of major interactions). Polypharmacy (≥5 concomitantly received medications) was associated with an increased risk of major pDDIs (adjusted OR, 5.72; 95% CI, 4.87-6.72); no associations were observed regarding age, sex, and number of prescribing physicians., Conclusion: The prevalence of pDDIs in this study was higher than previously reported in other European countries, with polypharmacy being a potential risk factor. Those results argue for a need for improvement in the area of prescribing in Greece., (Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.net.)
- Published
- 2022
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44. Synthesis, Bioactivity, Pharmacokinetic and Biomimetic Properties of Multi-Substituted Coumarin Derivatives.
- Author
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Katopodi A, Tsotsou E, Iliou T, Deligiannidou GE, Pontiki E, Kontogiorgis C, Tsopelas F, and Detsi A
- Subjects
- A549 Cells, Antioxidants chemistry, Antioxidants pharmacology, Biomimetics, Blood Proteins metabolism, Cell Survival drug effects, Coumarins pharmacology, Fluoresceins chemistry, Fluorescent Dyes chemistry, Free Radical Scavengers chemistry, Humans, Keratinocytes drug effects, Lipoxygenase Inhibitors chemistry, Lipoxygenase Inhibitors pharmacokinetics, Molecular Docking Simulation, Glycine max enzymology, Coumarins chemical synthesis, Coumarins pharmacokinetics, Lipoxygenase Inhibitors pharmacology
- Abstract
A series of novel multi-substituted coumarin derivatives were synthesized, spectroscopically characterized, and evaluated for their antioxidant activity, soybean lipoxygenase (LOX) inhibitory ability, their influence on cell viability in immortalized human keratinocytes (HaCaT), and cytotoxicity in adenocarcinomic human alveolar basal epithelial cells (A549) and human melanoma (A375) cells, in vitro. Coumarin analogues 4a - 4f , bearing a hydroxyl group at position 5 of the coumarin scaffold and halogen substituents at the 3-phenyl ring, were the most promising ABTS
•+ scavengers. 6,8-Dibromo-3-(4-hydroxyphenyl)-4-methyl-chromen-2-one ( 4k ) and 6-bromo-3-(4,5-diacetyloxyphenyl)-4-methyl-chromen-2-one ( 3m ) exhibited significant lipid peroxidation inhibitory activity (IC50 36.9 and 37.1 μM). In the DCF-DA assay, the 4'-fluoro-substituted compound 3f (100%), and the 6-bromo substituted compounds 3i (80.9%) and 4i (100%) presented the highest activity. The 3'-fluoro-substituted coumarins 3e and 4e , along with 3-(4-acetyloxyphenyl)-6,8-dibromo-4-methyl-chromen-2-one ( 3k ), were the most potent lipoxygenase (LOX) inhibitors (IC50 11.4, 4.1, and 8.7 μM, respectively) while displaying remarkable hydroxyl radical scavenging ability, 85.2%, 100%, and 92.9%, respectively. In silico docking studies of compounds 4e and 3k , revealed that they present allosteric interactions with the enzyme. The majority of the analogues (100 μΜ) did not affect the cell viability of HaCaT cells, though several compounds presented over 60% cytotoxicity in A549 or A375 cells. Finally, the human oral absorption (%HOA) and plasma protein binding (%PPB) properties of the synthesized coumarins were also estimated using biomimetic chromatography, and all compounds presented high %HOA (>99%) and %PPB (60-97%) values.- Published
- 2021
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45. Molecular Determinants of the Cardiometabolic Improvements of Dietary Flavanols Identified by an Integrative Analysis of Nutrigenomic Data from a Systematic Review of Animal Studies.
- Author
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Monfoulet LE, Ruskovska T, Ajdžanović V, Havlik J, Vauzour D, Bayram B, Krga I, Corral-Jara KF, Kistanova E, Abadjieva D, Massaro M, Scoditti E, Deligiannidou E, Kontogiorgis C, Arola-Arnal A, van Schothorst EM, Morand C, and Milenkovic D
- Subjects
- Animals, Computational Biology, Gene Expression Regulation, Mice, Rats, Cardiovascular Diseases prevention & control, Diet, Nutrigenomics, Polyphenols administration & dosage
- Abstract
Scope: Flavanols are important polyphenols of the human diet with extensive demonstrations of their beneficial effects on cardiometabolic health. They contribute to preserve health acting on a large range of cellular processes. The underlying mechanisms of action of flavanols are not fully understood but involve a nutrigenomic regulation., Methods and Results: To further capture how the intake of dietary flavanols results in the modulation of gene expression, nutrigenomics data in response to dietary flavanols obtained from animal models of cardiometabolic diseases have been collected and submitted to a bioinformatics analysis. This systematic analysis shows that dietary flavanols modulate a large range of genes mainly involved in endocrine function, fatty acid metabolism, and inflammation. Several regulators of the gene expression have been predicted and include transcription factors, miRNAs and epigenetic factors., Conclusion: This review highlights the complex and multilevel action of dietary flavanols contributing to their strong potential to preserve cardiometabolic health. The identification of the potential molecular mediators and of the flavanol metabolites driving the nutrigenomic response in the target organs is still a pending question which the answer will contribute to optimize the beneficial health effects of dietary bioactives., (© 2021 Wiley-VCH GmbH.)
- Published
- 2021
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46. Systematic Bioinformatic Analyses of Nutrigenomic Modifications by Polyphenols Associated with Cardiometabolic Health in Humans-Evidence from Targeted Nutrigenomic Studies.
- Author
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Ruskovska T, Budić-Leto I, Corral-Jara KF, Ajdžanović V, Arola-Arnal A, Bravo FI, Deligiannidou GE, Havlik J, Janeva M, Kistanova E, Kontogiorgis C, Krga I, Massaro M, Miler M, Milosevic V, Morand C, Scoditti E, Suárez M, Vauzour D, and Milenkovic D
- Subjects
- Adult, Cardiometabolic Risk Factors, Computational Biology, Female, Humans, Male, Metabolic Syndrome genetics, MicroRNAs blood, Middle Aged, Nutrigenomics, RNA, Messenger blood, Real-Time Polymerase Chain Reaction, Signal Transduction genetics, Metabolic Syndrome prevention & control, Nutritional Physiological Phenomena genetics, Polyphenols pharmacology, Protective Agents pharmacology
- Abstract
Cardiometabolic disorders are among the leading causes of mortality in the human population. Dietary polyphenols exert beneficial effects on cardiometabolic health in humans. Molecular mechanisms, however, are not completely understood. Aiming to conduct in-depth integrative bioinformatic analyses to elucidate molecular mechanisms underlying the protective effects of polyphenols on cardiometabolic health, we first conducted a systematic literature search to identify human intervention studies with polyphenols that demonstrate improvement of cardiometabolic risk factors in parallel with significant nutrigenomic effects. Applying the predefined inclusion criteria, we identified 58 differentially expressed genes at mRNA level and 5 miRNAs, analyzed in peripheral blood cells with RT-PCR methods. Subsequent integrative bioinformatic analyses demonstrated that polyphenols modulate genes that are mainly involved in the processes such as inflammation, lipid metabolism, and endothelial function. We also identified 37 transcription factors that are involved in the regulation of polyphenol modulated genes, including RELA/NFKB1, STAT1, JUN, or SIRT1. Integrative bioinformatic analysis of mRNA and miRNA-target pathways demonstrated several common enriched pathways that include MAPK signaling pathway, TNF signaling pathway, PI3K-Akt signaling pathway, focal adhesion, or PPAR signaling pathway. These bioinformatic analyses represent a valuable source of information for the identification of molecular mechanisms underlying the beneficial health effects of polyphenols and potential target genes for future nutrigenetic studies.
- Published
- 2021
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47. Potential drug-drug interaction between sodium-glucose co-transporter 2 inhibitors and statins: pharmacological and clinical evidence.
- Author
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Lalagkas PN, Poulentzas G, Kontogiorgis C, and Douros A
- Subjects
- Canagliflozin adverse effects, Canagliflozin pharmacology, Diabetes Mellitus, Type 2 drug therapy, Drug Interactions, Heart Failure drug therapy, Humans, Hydroxymethylglutaryl-CoA Reductase Inhibitors administration & dosage, Hydroxymethylglutaryl-CoA Reductase Inhibitors pharmacokinetics, Renal Insufficiency, Chronic drug therapy, Sodium-Glucose Transporter 2 Inhibitors administration & dosage, Sodium-Glucose Transporter 2 Inhibitors pharmacology, Canagliflozin administration & dosage, Hydroxymethylglutaryl-CoA Reductase Inhibitors adverse effects, Sodium-Glucose Transporter 2 Inhibitors adverse effects
- Abstract
Introduction: Recent case reports suggested that concomitant use of sodium-glucose co-transporter 2 (SGLT2) inhibitors with statins could lead to increased statin toxicity. We provide a comprehensive overview of the available pharmacological and clinical evidence on this potential drug-drug interaction (DDI)., Areas Covered: We searched MEDLINE PubMed until November 2020 for (i) pharmacokinetic studies on SGLT2 inhibitors, statins, and their potential interaction, and (ii) case reports and clinical studies assessing the safety of concomitant use of SGLT2 inhibitors and statins. We also searched regulatory documents submitted to the United States Food and Drug Administration for unpublished data on this potential DDI., Expert Opinion: SGLT2 inhibitors are increasingly used for type 2 diabetes, chronic heart failure, and chronic kidney disease, and concomitant use with statins is common given the comorbidity of indications. While pharmacokinetic studies in healthy subjects showed no clinically relevant changes in statin levels during SGLT2 inhibitor co-administration, the published case reports and pharmacologic reasoning support the possibility of an interaction. Underlying mechanisms could be pharmacokinetic or pharmacodynamic, and canagliflozin appears to be the SGLT2 inhibitor with the highest interaction potential. Further research including 'real-world' pharmacoepidemiologic studies is needed to better understand the clinical significance of this DDI.
- Published
- 2021
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48. The Role of Natural Products in Rheumatoid Arthritis: Current Knowledge of Basic In Vitro and In Vivo Research.
- Author
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Deligiannidou GE, Gougoula V, Bezirtzoglou E, Kontogiorgis C, and Constantinides TK
- Abstract
Rheumatoid arthritis (RA) is an autoimmune disorder affecting a vast variety of the population. The onset of RA as well as the development of systematic immunization is affected by both genetic and environmental risk factors. This review aims to point out the role of natural products in the management of RA, focusing on the reports of basic research (in vitro and animal studies) emphasizing the antioxidant and anti-inflammatory properties considered in the field of RA. A systematic screening of the relevant literature was carried out on PubMed, Google Scholar, and Scopus with the following criteria: publication date, 2015-2020; language, English; study design, in vitro or animal models; and the investigation of one or several natural products in the context of RA, including, when available, the molecular mechanisms implicated. A total of 211 papers were initially obtained and screened. In vitro and animal studies referring to 20 natural products and 15 pure compounds were ultimately included in this review. The outcomes of this work provide an overview of the methods employed in basic research over the past five years, with emphasis on the limitations presented, while demonstrating the potential benefits of utilizing natural products in the management of RA as supported by in vitro and animal studies.
- Published
- 2021
- Full Text
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49. Concordance of genotypic resistance interpretation algorithms in HIV-1 infected patients: An exploratory analysis in Greece.
- Author
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Kantzanou M, Karalexi MA, Zivinaki A, Riza E, Papachristou H, Vasilakis A, Kontogiorgis C, and Linos A
- Subjects
- Algorithms, Drug Resistance, Viral genetics, Greece, Humans, Anti-HIV Agents pharmacology, Anti-HIV Agents therapeutic use, HIV-1 genetics
- Abstract
Purpose: Genotypic resistance-related mutations in HIV-1 disease are often difficult to interpret. Different algorithms have been developed to provide meaningful application into clinical context. We aimed to compare, for the first time in Greece, the results of genotypic resistance derived from three interpretation algorithms., Methods: The sequences of 120 HIV 1-infected patients were tested for genotypic resistance to 19 antiretroviral (ARV) drugs (n = 2280 sequences). The interpretation results of Rega, ANRS and ViroSeq algorithms were compared., Results: Complete concordance was found for 2/19 ARV drugs, namely lamivudine and emptricitabine. Concordance was high for nucleoside reverse transcriptase inhibitors (NRTIs) and low for protease inhibitors (PIs). In inter-algorithm pairs, agreement was high between Rega and ViroSeq (kappa = 0.701), especially by ARV class, namely NRTIs (k = 0.869) and NNRTIs (k = 0.562). The only exception was noted for rilpivirine, where agreement was higher between ANRS and Rega (k = 0.410) compared to other inter-algorithm pairs (k = 0.018-0.055). By contrast, for PIs all comparisons yielded concordance equivalent to chance (k = 0.000)., Conclusions: Our exploratory analysis provided evidence of significant inter-algorithm discordances, especially for PIs and NNRTIs highlighting the importance of matching the results of different algorithms to achieve optimized risk stratification. Ongoing research could assist clinical physicians in interpreting complex genotypic resistance patterns., (Copyright © 2021 Elsevier B.V. All rights reserved.)
- Published
- 2021
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50. Air Contamination in Different Departments of a Tertiary Hospital. Assessment of Microbial Load and of Antimicrobial Susceptibility.
- Author
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Tselebonis A, Nena E, Panopoulou M, Kontogiorgis C, Bezirtzoglou E, and Constantinidis T
- Abstract
Air contamination in the hospital setting can be a reason for the spread of nosocomial infection among susceptible patients. The aim of this study was to identify bacterial species, and their load and drug resistance, in the air of a tertiary hospital. Air samples were collected on a monthly basis for 12 consecutive months in four different departments of the hospital (Intensive Care Unit (ICU), Internal Medicine Ward (IMW), Surgical Ward (SW), and Neonatal Unit (NU)). In total, 101 samples were collected, out of which 158 Gram-positive (GP) and 44 Gram-negative (GN) strains were isolated. The majority of GP isolates were Staphylococcus spp. ( n = 100). The highest total microbial load was reported in the IMW ( p = 0.005), while the highest Staphylococcus load was observed in the ICU ( p = 0.018). GP bacterial load was higher in autumn, while GN load was higher in spring. Regarding drug resistance, four multi-drug-resistant (MDR) strains and one extensively drug-resistant (XDR) strain were isolated in the ICU, two MDR strains and one XDR strain in the SW, one MDR strain in the IMW and one MDR strain in the NU samples. Air in hospital settings is contaminated with various microbes; some of them are MDR, consisting a potential cause of hospital-acquired infection.
- Published
- 2020
- Full Text
- View/download PDF
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