Πλοήγηση ανά Συγγραφέα "Manta, S."
-
Kinetic and in silico analysis of the slow-binding inhibition of human poly(A)-specific ribonuclease (PARN) by novel nucleoside analogues
Balatsos, N.; Vlachakis, D.; Chatzigeorgiou, V.; Manta, S.; Komiotis, D.; Vlassi, M.; Stathopoulos, C. (2012)Poly(A)-specific ribonuclease (PARN) is a 3'-exoribonuclease that efficiently degrades poly(A) tails and regulates, in part, mRNA turnover rates. We have previously reported that adenosine- and cytosine-based glucopyranosyl ... -
A novel and easy two-step, microwave-assisted method for the synthesis of halophenyl pyrrolo 2,3-b quinoxalines via their pyrrolo precursors. Evaluation of their bioactivity
Manta, S.; Gkaragkouni, D. N.; Kaffesaki, E.; Gkizis, P.; Hadjipavlou-Litina, D.; Pontiki, E.; Balzarini, J.; Dehaen, W.; Komiotis, D. (2014)A novel, two-step, facile route for the synthesis of pyrrolo[2,3-b]quinoxalines via 2,3-dioxopyrroles, enhanced by microwave irradiation, is presented. The newly synthesized 2,3-dioxo-5-halophenyl pyrrolo precursors 4a-c ... -
Rapid microwave-enhanced synthesis of C5-alkynyl pyranonucleosides as novel cytotoxic antitumor agents
Dimopoulou, A.; Manta, S.; Kiritsis, C.; Gkaragkouni, D. N.; Papasotiriou, I.; Balzarini, J.; Komiotis, D. (2013)A microwave-assisted, one-pot, coupling reaction for the synthesis of C5-alkynyl-uracil and cytosine glucopyranonucleosides has been developed. The reaction is carried out under standard Sonogashira coupling conditions ... -
The s-Hole Phenomenon of Halogen Atoms Forms the Structural Basis of the Strong Inhibitory Potency of C5 Halogen Substituted Glucopyranosyl Nucleosides towards Glycogen Phosphorylase b
Kantsadi, A. L.; Hayes, J. M.; Manta, S.; Skamnaki, V. T.; Kiritsis, C.; Psarra, A. M. G.; Koutsogiannis, Z.; Dimopoulou, A.; Theofanous, S.; Nikoleousakos, N.; Zoumpoulakis, P.; Kontou, M.; Papadopoulos, G.; Zographos, S. E.; Komiotis, D.; Leonidas, D. D. (2012)C5 halogen substituted glucopyranosyl nucleosides (1-(beta-D-glucopyranosyl)-5-X-uracil; X=Cl, Br, I) have been discovered as some of the most potent active site inhibitors of glycogen phosphorylase (GP), with respective ... -
STEREOCONTROLLED FACILE SYNTHESIS AND BIOLOGICAL EVALUATION OF (3 ' S) AND (3 ' R)-3 '-AMINO (AND AZIDO)-3 '-DEOXY PYRANONUCLEOSIDES
Manta, S.; Parmenopoulou, V.; Kiritsis, C.; Dimopoulou, A.; Kollatos, N.; Papasotiriou, I.; Balzarini, J.; Komiotis, D. (2012)This article describes the synthesis of (3'S) and (3'R)-3'-amino-3'-deoxy pyranonucleosides and their precursors (3'S) and (3'R)-3'-azido-3'-deoxy pyranonucleosides. Azidation of 1,2:5,6-di-O-isopropylidene-3-O-toluenesu ... -
Stereocontrolled synthesis of 4 '-C-cyano and 4 '-C-cyano-4 '-deoxy pyrimidine pyranonucleosides as potential chemotherapeutic agents
Kiritsis, C.; Manta, S.; Parmenopoulou, V.; Dimopoulou, A.; Kollatos, N.; Papasotiriou, I.; Balzarini, J.; Komiotis, D. (2012)A new series of 4'-C-cyano and 4'-C-cyano-4'-deoxy pyrimidine pyranonucleosides has been designed and synthesized. Commercially available 1,2,3,4,6-penta-O-acetyl-D-mannopyranose (1) was condensed with silylated 5-fluorouracil, ... -
Stereoselective facile synthesis of 2 '-spiro pyrimidine pyranonucleosides via their key intermediate 2 '-C-cyano analogues. Evaluation of their bioactivity
Kiritsis, C.; Manta, S.; Dimopoulou, A.; Parmenopoulou, V.; Gkizis, P.; Balzarini, J.; Komiotis, D. (2014)A novel series of 2'-spiro pyrimidine pyranonucleosides has been designed and synthesized. Their precursors, 2'-C-cyano nucleosides 5a,b and 6a,b, were obtained by subjecting 1a,b to the sequence of selective protection ... -
Structure based inhibitor design targeting glycogen phosphorylase b. Virtual screening, synthesis, biochemical and biological assessment of novel N-acyl-beta-D-glucopyranosylamines
Parmenopoulou, V.; Kantsadi, A. L.; Tsirkone, V. G.; Chatzileontiadou, D. S. M.; Manta, S.; Zographos, S. E.; Molfeta, C.; Archontis, G.; Agius, L.; Hayes, J. M.; Leonidas, D. D.; Komiotis, D. (2014)Glycogen phosphorylase (GP) is a validated target for the development of new type 2 diabetes treatments. Exploiting the Zinc docking database, we report the in silico screening of 1888 N-acyl-beta-D-glucopyranosylamines ... -
Study of the interaction among Notch pathway receptors, correlation with stemness, as well as their interaction with CD44, dipeptidyl peptidase-IV, hepatocyte growth factor receptor and the SETMAR transferase, in colon cancer stem cells
Apostolou, P.; Toloudi, M.; Ioannou, E.; Kourtidou, E.; Chatziioannou, M.; Kopic, A.; Komiotis, D.; Kiritsis, C.; Manta, S.; Papasotiriou, I. (2013)Context: The Notch signaling pathway is one of the most important pathways during normal development and implicated in self-renewal of adult stem cells and differentiation of progenitor cells. Abnormal expression of Notch ... -
Synthesis and Biological Evaluation of 3 '-C-Ethynyl and 3 '-C-(1,4-disubstituted-1,2,3-triazolo) Double-Headed Pyranonucleosides
Kiritsis, C.; Manta, S.; Papasotiriou, I.; Coutouli-Argyropoulou, E.; Trakossas, S.; Balzarini, J.; Komiotis, D. (2012)A novel series of 3'-C-ethynyl and 3'-C-(1,4-disubstituted-1,2,3-triazolo) double-headed pyranonucleosides has been designed and synthesized. Reaction of 3-keto glucoside 1 with ethynyl magnesium bromide gave the desired ... -
Synthesis and biological evaluation of 3′-c-ethynyl and 3′-c-(1,4-disubstituted-1,2,3-triazolo) double-headed pyranonucleosides
Kiritsis, C.; Manta, S.; Papasotiriou, I.; Coutouli-Argyropoulou, E.; Trakossas, S.; Balzarini, J.; Komiotis, D. (2012)A novel series of 3′-C-ethynyl and 3′-C-(1,4-disubstituted-1,2, 3-triazolo) double-headed pyranonucleosides has been designed and synthesized. Reaction of 3-keto glucoside 1 with ethynyl magnesium bromide gave the desired ... -
Synthesis and biological evaluation of unsaturated keto and exomethylene D-arabinopyranonucleoside analogs: Novel 5-fluorouracil analogs that target thymidylate synthase
Tzioumaki, N.; Manta, S.; Tsoukala, E.; Voorde, J. V.; Liekens, S.; Komiotis, D.; Balzarini, J. (2011)The synthesis of pyrimidine unsaturated keto and exomethylene arabinopyranonucleoside analogs as potential antitumor and antiviral agents is described. Commercially available 1,2,3,4-tetra-O-acetyl-D-arabinopyranose (1) ... -
Synthesis of 3-fluoro-6-S-(2-S-pyridyl) nucleosides as potential lead cytostatic agents
Tsoukala, E.; Tzioumaki, N.; Manta, S.; Riga, A.; Balzarini, J.; Komiotis, D. (2010)The 3-deoxy-3-fluoro-6-S-(2-S-pyridyl)-6-thio-beta-D-glucopyranosyl nucleoside analogs 7 were prepared via two facile synthetic routes. Their precursors, 3-fluoro-6-thio-glucopyranosyl nucleosides 5a-e, were obtained by ... -
Synthesis of 4,6-dideoxy-3-fluoro-2-keto-beta-D-glucopyranosyl analogues of 5-fluorouracil, N-6-benzoyl adenine, uracil, thymine, N-4-benzoyl cytosine and evaluation of their antitumor activities
Manta, S.; Tsoukala, E.; Tzioumaki, N.; Kiritsis, C.; Balzarini, J.; Komiotis, D. (2010)The synthesis of the unsaturated 4,6-dideoxy-3-fluoro-2-keto-beta-D-glucopyranosyl nucleosides of 5-fluorouracil (6a), N-6-benzoyl adenine (6b), uracil (6c), thymine (6d) and N-4-benzoyl cytosine (6e), is described. ... -
Synthesis of Novel Thiopurine Pyranonucleosides: Evaluation of Their Bioactivity
Dimopoulou, A.; Manta, S.; Parmenopoulou, V.; Gkizis, P.; Coutouli-Argyropoulou, E.; Schols, D.; Komiotis, D. (2015)We report the synthesis of novel thiopurine pyranonucleosides. Direct coupling of silylated 6-mercaptopurine and 6-thioguanine with the appropriate pyranoses 1a-e via Vorbruggen nucleosidation, gave the N-9 linked ... -
Synthesis, Antiviral and Cytostatic Evaluation of Unsaturated Exomethylene and Keto D-Lyxopyranonucleoside Analogues
Tzioumaki, N.; Tsoukala, E.; Manta, S.; Agelis, G.; Balzarini, J.; Komiotis, D. (2009)This report describes the synthesis of unsaturated exomethylene lyxopyranonucleoside analogues as potential biologically active agents. Commercially available 1,2,3,4-tetra-O-acetyl-alpha-D-lyxopyranose 1 was condensed ... -
Triazole pyrimidine nucleosides as inhibitors of Ribonuclease A. Synthesis, biochemical, and structural evaluation
Parmenopoulou, V.; Chatzileontiadou, D. S. M.; Manta, S.; Bougiatioti, S.; Maragozidis, P.; Gkaragkouni, D. N.; Kaffesaki, E.; Kantsadi, A. L.; Skamnaki, V. T.; Zographos, S. E.; Zounpoulakis, P.; Balatsos, N. A. A.; Komiotis, D.; Leonidas, D. D. (2012)Five ribofuranosyl pyrimidine nucleosides and their corresponding 1,2,3-triazole derivatives have been synthesized and characterized. Their inhibitory action to Ribonuclease A has been studied by biochemical analysis and ... -
Unsaturated dideoxy fluoro-ketopyranosyl nucleosides as new cytostatic agents: A convenient synthesis of 2,6-dideoxy-3-fluoro-4-keto-beta-D-glucopyranosyl analogues of uracil, 5-fluorouracil, thymine, N-4-benzoyl cytosine and N-6-benzoyl adenine
Manta, S.; Tzioumaki, N.; Tsoukala, E.; Panagiotopoulou, A.; Pelecanou, M.; Balzarini, J.; Komiotis, D. (2009)The beta-protected nucleosides of uracil (2a), 5-fluorouracil (2b), thymine (2c), N-4-benzoyl cytosine (2d) and N-6-benzoyl adenine (2e) were synthesized by condensation of the peracetylated 3-deoxy-3-fluoro-D-glucopyramose ... -
Unsaturated fluoro-ketopyranosyl nucleosides: Synthesis and biological evaluation of 3-fluoro-4-keto-beta-D-glucopyranosyl derivatives of N(4)-benzoyl cytosine and N(6)-benzoyl adenine
Manta, S.; Agelis, G.; Botic, T.; Cencic, A.; Komiotis, D. (2008)The protected beta-nucleosides 1-(2,4,6-tri-O-acetyl-3-deoxy-3-fluoro-beta-D-glucopyranosyl)-N(4)-benzoyl cytosine (2a) and 9-(2,4,6-tri-O-acetyl3-deoxy-3-fluoro-O-D-glucopyranosyl)-N6-benzoyl adenine (2b), were synthesized ... -
Unsaturation: An important structural feature to nucleosides' antiviral activity
Manta, S.; Kiritsis, C.; Dimopoulou, A.; Parmenopoulou, V.; Kollatos, N.; Tsotinis, A.; Komiotis, D. (2014)In the search of effective, selective and nontoxic antiviral agents, a variety of nucleoside analogues have been synthesized, with different functionalities in the carbohydrate moiety and/or the heterocyclic base. Nucleoside ...