ANTHONY TSARBOPOULOS

Prof. ANTHONY TSARBOPOULOS

National & Kapodistrian University of Athens, Medical School
orcid

Research Focus & Metrics

Academic Career Length

34Years (1993-Present)

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

Representative Publications

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1 August 2017 in Progress in Neurobiology
Verified
Journal Article
Closed access
MBMathieu Bourdenx
Mathieu Bourdenx
NKNikolaos Stavros Koulakiotis
Nikolaos Stavros Koulakiotis
Despina SanoudouDespina Sanoudou
Despina Sanoudou
Erwan BezardErwan Bezard
Erwan Bezard
BDBenjamin DEHAY
Benjamin DEHAY
ANTHONY TSARBOPOULOSANTHONY TSARBOPOULOS
ANTHONY TSARBOPOULOS

6 April 2022 in Cells
Verified
Journal Article
Open access
PDF file
IDIoanna Dagla
Ioanna Dagla
AIAikaterini Iliou
Aikaterini Iliou
DBDimitra Benaki
Dimitra Benaki
Evangelos GikasEvangelos Gikas
Evangelos Gikas
Emmanuel MikrosEmmanuel Mikros
Emmanuel Mikros
ANTHONY TSARBOPOULOSANTHONY TSARBOPOULOS
ANTHONY TSARBOPOULOS
Vaccination is currently the most effective strategy for the mitigation of the COVID-19 pandemic. mRNA vaccines trigger the immune system to produce neutralizing antibodies (NAbs) against SARS-CoV-2 spike proteins. However, the underlying molecular processes affecting immune response after vaccination remain poorly understood, while there is significant heterogeneity in the immune response among individuals. Metabolomics have often been used to provide a deeper understanding of immune cell responses, but in the context of COVID-19 vaccination such data are scarce. Mass spectrometry (LC-MS) and nuclear magnetic resonance (NMR)-based metabolomics were used to provide insights based on the baseline metabolic profile and metabolic alterations induced after mRNA vaccination in paired blood plasma samples collected and analysed before the first and second vaccination and at 3 months post first dose. Based on the level of NAbs just before the second dose, two groups, “low” and “high” responders, were defined. Distinct plasma metabolic profiles were observed in relation to the level of immune response, highlighting the role of amino acid metabolism and the lipid profile as predictive markers of response to vaccination. Furthermore, levels of plasma ceramides along with certain amino acids could emerge as predictive biomarkers of response and severity of inflammation.

23 October 2020 in Scientific Reports
Verified
Journal Article
Open access
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NKNikolaos Stavros Koulakiotis
Nikolaos Stavros Koulakiotis
PPPasi Purhonen
Pasi Purhonen
Evangelos GikasEvangelos Gikas
Evangelos Gikas
HHHans Hebert
Hans Hebert
ANTHONY TSARBOPOULOSANTHONY TSARBOPOULOS
ANTHONY TSARBOPOULOS
Natural products have played a dominant role in the discovery of lead compounds for the development of drugs aimed at the treatment of human diseases. This electrospray ionization-ion mobility spectrometry-mass spectrometry (ESI-IMS-MS)—based study demonstrates that dietary antioxidants, isolated components from the stigmas of saffron (Crocus sativus L.) may be effective in inhibiting Aβ fibrillogenesis, a neuropathological hallmark of Alzheimer’s Disease (AD). This study reveals a substantial alteration in the monomer/oligomer distribution of Aβ1-40, concomitant with re-direction of fibril formation, induced by the natural product interaction. These alterations on the Aβ1-40 aggregation pathway are most prominent for trans-crocin-4 (TC4). Use of ESI-IMS-MS, electron microscopy alongside Thioflavin-T kinetics, and the interpretation of 3-dimensional Driftscope plots indicate a correlation of these monomer/oligomer distribution changes with alterations to Aβ1-40 amyloid formation. The latter could prove instrumental in the development of novel aggregation inhibitors for the prevention, or treatment of AD.

1 June 2005 in Journal of Liquid Chromatography & Related Technologies
Verified
Journal Article
Closed access
AAApostolis Agalias
Apostolis Agalias
EMEleni Melliou
Eleni Melliou
Prokopios MagiatisProkopios Magiatis
Prokopios Magiatis
SMSofia Mitaku
Sofia Mitaku
Evangelos GikasEvangelos Gikas
Evangelos Gikas
ANTHONY TSARBOPOULOSANTHONY TSARBOPOULOS
ANTHONY TSARBOPOULOS
An extraction procedure and chromatographic methodology for the simultaneous quantitation of four major constituents in the boiling water extracts (decoctions) of Olea europaea leaves has been developed. The four studied constituents were oleuropein, elenolic acid, hydroxytyrosol, and tyrosol. The quantitation was performed using HPLC‐DAD, whereas qualitative data were acquired using LC‐MS. The developed methodology was applied in the study of ten Olea europaea varieties commonly cultivated in Greece. The chromatographic analysis revealed important differences among the varieties. The decoction of variety gaidouroelia was identified as the best source of oleuropein, but it was completely lacking of elenolic acid. The decoction of variety koronaiiki was the best source of hydroxytyrosol, whereas the variety mastoides was the best source of tyrosol and elenolic acid. In addition, the methanol and acetone extracts of one of the studied varieties (koranaiiki) were investigated, in order to compare the concentration of oleuropein in the extracts and the decoction. Interestingly, only a very low percent of the total oleuropein is present in the traditionally prepared decoction, while elenolic acid, which is a minor constituent of the extracts, was found to be one of the major constituents of the decoction.

1 October 1993 in Journal of Biological Chemistry
Verified
Journal Article
Open access
MGM D Gross
M D Gross
MGM Gosnell
M Gosnell
ANTHONY TSARBOPOULOSANTHONY TSARBOPOULOS
ANTHONY TSARBOPOULOS
WHW Hunziker
W Hunziker
Calbindin-D28K, a member of the troponin C superfamily of calcium-binding proteins, had six putative EF hand domains containing one very high affinity and two to three lower affinity calcium-binding sites. The location and binding activity of the calcium-binding sites were examined with a recombinant calbindin-D28K protein. This protein (Calb I-II) only contained EF hand domains 1 and 2 of calbindin-D28K. Binding of calcium and calcium analogs, the lanthanides, by the recombinant protein was determined in fluorescence emission experiments. Calb I-II bound 1 mol of terbium/mol of protein. Terbium was displaced from Calb I-II by other lanthanides and calcium. Fluorescence from terbium was not quenched by holmium. These results and Hill plots of calcium binding activity, determined from intrinsic protein fluorescence measurements, indicated the presence of a single high affinity calcium-binding site on Calb I-II. The properties of the binding site indicated that the very high affinity site of calbindin-D28K was located in EF hand domains 1 and 2 of the protein. In addition, these findings indicated the NH2-terminal pair of EF hands in calbindin-D28K did not depend on interactions with other domains in the protein for high affinity calcium binding activity. The results suggested at least one calcium-binding domain of calbindin-D28K can exist as an independent EF hand pair.

1 September 2018 in Fitoterapia
Verified
Journal Article
Closed access
EKEvangelia Karkoula
Evangelia Karkoula
NLNikolaos Lemonakis
Nikolaos Lemonakis
Nikolaos KokrasNikolaos Kokras
Nikolaos Kokras
CDChristina Dalla
Christina Dalla
Evangelos GikasEvangelos Gikas
Evangelos Gikas
ANTHONY TSARBOPOULOSANTHONY TSARBOPOULOS
ANTHONY TSARBOPOULOS