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Dzmitruk V, Szulc A, Shcharbin D, Janaszewska A, Shcharbina N, Lazniewska J, Novopashina D, Buyanova M, Ionov M, Klajnert-Maculewicz B, Gómez-Ramirez R, Mignani S, Majoral JP, Muñoz-Fernández MA, Bryszewska M. Anticancer siRNA cocktails as a novel tool to treat cancer cells. Part (B). Efficiency of pharmacological action. Int J Pharm 2015; 485:288-94. [PMID: 25796120 DOI: 10.1016/j.ijpharm.2015.03.034] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 03/10/2015] [Accepted: 03/14/2015] [Indexed: 12/14/2022]
Abstract
This paper examines a perspective to use newly engineered nanomaterials as effective and safe carriers for gene therapy of cancer. Three different groups of cationic dendrimers (PAMAM, phosphorus, and carbosilane) were complexed with anticancer siRNA and the biophysical properties of the dendriplexes created were analyzed. The potential of the dendrimers as nanocarriers for anticancer Bcl-xl, Bcl-2, Mcl-1 siRNAs and additionally a scrambled sequence siRNA has been explored. Dendrimer/siRNA complexes were characterised by various methods including fluorescence, zeta potential, dynamic light scattering, circular dichroism, gel electrophoresis and transmission electron microscopy. In this part of study, the transfection of complexes in HeLa and HL-60 cells was analyzed using both single apoptotic siRNAs and a mixture (cocktail) of them. Cocktails were more effective than single siRNAs, allowing one to decrease siRNAs concentration in treating cells. The dendrimers were compared as siRNA carriers, the most effective being the phosphorus-based ones. However, they were also the most cytotoxic on their own, so that in this regard the application of all dendrimers in anticancer therapy will be discussed.
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Affiliation(s)
- Volha Dzmitruk
- Institute of Biophysics and Cell Engineering of NASB, Minsk, Belarus
| | - Aleksandra Szulc
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Dzmitry Shcharbin
- Institute of Biophysics and Cell Engineering of NASB, Minsk, Belarus.
| | - Anna Janaszewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Natallia Shcharbina
- Republican Research and Practical Center of Neurology and Neurosurgery, Minsk, Belarus
| | - Joanna Lazniewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Darya Novopashina
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Novosibirsk, Russia
| | - Marina Buyanova
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Novosibirsk, Russia
| | - Maksim Ionov
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland.
| | - Barbara Klajnert-Maculewicz
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland; Leibniz-Institut fur Polymerforschung Dresden e.V., HoheStrasse 6,01069 Dresden, Germany
| | - Rafael Gómez-Ramirez
- Departamento Química Orgánica y Química Inorgánica, Universidad de Alcalá, Alcalá de Henares, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Spain
| | - Serge Mignani
- Université Paris Descartes, PRES Sorbonne Paris Cité, CNRS UMR, 860, Paris, France
| | | | - Maria Angeles Muñoz-Fernández
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Spain; Laboratorio de Inmunobiología Molecular, Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - Maria Bryszewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
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Ionov M, Lazniewska J, Dzmitruk V, Halets I, Loznikova S, Novopashina D, Apartsin E, Krasheninina O, Venyaminova A, Milowska K, Nowacka O, Gomez-Ramirez R, de la Mata FJ, Majoral JP, Shcharbin D, Bryszewska M. Anticancer siRNA cocktails as a novel tool to treat cancer cells. Part (A). Mechanisms of interaction. Int J Pharm 2015; 485:261-9. [PMID: 25791760 DOI: 10.1016/j.ijpharm.2015.03.024] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/10/2015] [Accepted: 03/13/2015] [Indexed: 12/25/2022]
Abstract
This paper examines a perspective on the use of newly engineered nanomaterials as effective and safe carriers of genes for the therapy of cancer. Three different groups of cationic dendrimers (PAMAM, phosphorus and carbosilane) were complexed with anticancer siRNA and their biophysical properties of the dendriplexes analyzed. The potential of the dendrimers as nanocarriers for anticancer siBcl-xl, siBcl-2, siMcl-1 siRNAs and a siScrambled sequence was explored. Dendrimer/siRNA complexes were characterized by methods including fluorescence, zeta potential, dynamic light scattering, circular dichroism, gel electrophoresis and transmission electron microscopy. Some of the experiments were done with heparin to check if siRNA can be easily disassociated from the complexes, and whether released siRNA maintains its structure after interaction with the dendrimer. The results indicate that siRNAs form complexes with all the dendrimers tested. Oligoribonucleotide duplexes can be released from dendriplexes after heparin treatment and the structure of siRNA is maintained in the case of PAMAM or carbosilane dendrimers. The dendrimers were also effective in protecting siRNA from RNase A activity. The selection of the best siRNA carrier will be made based on cell culture studies (Part B).
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Affiliation(s)
- Maksim Ionov
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Poland.
| | - Joanna Lazniewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Poland
| | - Volha Dzmitruk
- Institute of Biophysics and Cell Engineering of NASB, Minsk, Belarus
| | - Inessa Halets
- Institute of Biophysics and Cell Engineering of NASB, Minsk, Belarus
| | | | - Darya Novopashina
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Novosibirsk, Russia
| | - Evgeny Apartsin
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Novosibirsk, Russia
| | - Olga Krasheninina
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Novosibirsk, Russia
| | - Alya Venyaminova
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Novosibirsk, Russia
| | - Katarzyna Milowska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Poland
| | - Olga Nowacka
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Poland
| | - Rafael Gomez-Ramirez
- Departamento Química Orgánica y Química Inorgánica, Universidad de Alcalá, Alcalá de Henares, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Spain
| | - Francisco Javier de la Mata
- Departamento Química Orgánica y Química Inorgánica, Universidad de Alcalá, Alcalá de Henares, Spain; Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Spain
| | | | - Dzmitry Shcharbin
- Institute of Biophysics and Cell Engineering of NASB, Minsk, Belarus.
| | - Maria Bryszewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Poland
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Ionov M, Ciepluch K, Garaiova Z, Melikishvili S, Michlewska S, Balcerzak Ł, Glińska S, Miłowska K, Gomez-Ramirez R, de la Mata FJ, Shcharbin D, Waczulikova I, Bryszewska M, Hianik T. Dendrimers complexed with HIV-1 peptides interact with liposomes and lipid monolayers. Biochim Biophys Acta 2015; 1848:907-15. [PMID: 25576765 DOI: 10.1016/j.bbamem.2014.12.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 12/23/2014] [Accepted: 12/30/2014] [Indexed: 12/27/2022]
Abstract
AIMS We have investigated the effect of surface charge of model lipid membranes on their interactions with dendriplexes formed by HIV-derived peptides and 2 types of positively charged carbosilane dendrimers (CBD). METHODS Interaction of dendriplexes with lipid membranes was measured by fluorescence anisotropy, dynamic light scattering and Langmuir-Blodgett techniques. The morphology of the complexes was examined by transmission electron microscopy. RESULTS All dendriplexes independent of the type of peptide interacted with model lipid membranes. Negatively charged vesicles composed of a mixture of DMPC/DPPG interacted more strongly, and it was accompanied by an increase in anisotropy of the fluorescent probe localized in polar domain of lipid bilayers. There was also an increase in surface pressure of the lipid monolayers. Mixing negatively charged liposomes with dendriplexes increased liposome size and made their surface charges more positive. CONCLUSIONS HIV-peptide/dendrimer complexes interact with model lipid membranes depending on their surface charge. Carbosilane dendrimers can be useful as non-viral carriers for delivering HIV-peptides into cells.
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Affiliation(s)
- Maksim Ionov
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland.
| | - Karol Ciepluch
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland
| | - Zuzana Garaiova
- Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina, 842 48 Bratislava, Slovakia
| | - Sophie Melikishvili
- Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina, 842 48 Bratislava, Slovakia
| | - Sylwia Michlewska
- Laboratory of Electron Microscopy, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Łódż, Poland
| | - Łucja Balcerzak
- Laboratory of Electron Microscopy, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Łódż, Poland
| | - Sława Glińska
- Laboratory of Electron Microscopy, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Łódż, Poland
| | - Katarzyna Miłowska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland
| | - Rafael Gomez-Ramirez
- Departamento Química Inorgánica, Universidad de Alcalá de Henares, CIBER-BBN Alcalá de Henares, Spain
| | | | - Dzmitry Shcharbin
- Institute of Biophysics and Cell Engineering of NASB, Minsk, Belarus
| | - Iveta Waczulikova
- Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina, 842 48 Bratislava, Slovakia
| | - Maria Bryszewska
- Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland
| | - Tibor Hianik
- Faculty of Mathematics, Physics and Informatics, Comenius University, Mlynska dolina, 842 48 Bratislava, Slovakia
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Córdoba EV, Pion M, Rasines B, Filippini D, Komber H, Ionov M, Bryszewska M, Appelhans D, Muñoz-Fernández M. Glycodendrimers as new tools in the search for effective anti-HIV DC-based immunotherapies. Nanomedicine: Nanotechnology, Biology and Medicine 2013; 9:972-84. [DOI: 10.1016/j.nano.2013.03.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 02/28/2013] [Accepted: 03/08/2013] [Indexed: 11/29/2022]
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Ionov M, Ciepluch K, Moreno B, Appelhans D, Sanchez-Nieves J, Gomez R, de la Mata F, Munoz-Fernandez M, Bryszewska M. Biophysical Characterization of Glycodendrimers As Nano-carriers for HIV Peptides. Curr Med Chem 2013; 20:3935-43. [DOI: 10.2174/09298673113209990192] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 07/04/2013] [Accepted: 06/23/2013] [Indexed: 11/22/2022]
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Olchowik E, Lotkowski K, Mavlyanov S, Abdullajanova N, Ionov M, Bryszewska M, Zamaraeva M. Stabilization of erythrocytes against oxidative and hypotonic stress by tannins isolated from sumac leaves (Rhus typhina L.) and grape seeds (Vitis vinifera L.). Cell Mol Biol Lett 2012; 17:333-48. [PMID: 22491984 PMCID: PMC6275782 DOI: 10.2478/s11658-012-0014-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Accepted: 03/29/2012] [Indexed: 01/25/2023] Open
Abstract
Erythrocytes are constantly exposed to ROS due to their function in the organism. High tension of oxygen, presence of hemoglobin iron and high concentration of polyunsaturated fatty acids in membrane make erythrocytes especially susceptible to oxidative stress. A comparison of the antioxidant activities of polyphenol-rich plant extracts containing hydrolysable tannins from sumac leaves (Rhus typhina L.) and condensed tannins from grape seeds (Vitis vinifera L.) showed that at the 5-50 μg/ml concentration range they reduced to the same extent hemolysis and glutathione, lipid and hemoglobin oxidation induced by erythrocyte treatment with 400 μM ONOO(-) or 1 mM HClO. However, extract (condensed tannins) from grape seeds in comparison with extract (hydrolysable tannins) from sumac leaves stabilized erythrocytes in hypotonic NaCl solutions weakly. Our data indicate that both hydrolysable and condensed tannins significantly decrease the fluidity of the surface of erythrocyte membranes but the effect of hydrolysable ones was more profound. In conclusion, our results indicate that extracts from sumac leaves (hydrolysable tannins) and grape seeds (condensed tannins) are very effective protectors against oxidative damage in erythrocytes.
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Affiliation(s)
- Ewa Olchowik
- Department of Biophysics, University of Białystok, Świerkowa 20B, 15-950 Białystok, Poland
| | - Karol Lotkowski
- Department of Biophysics, University of Białystok, Świerkowa 20B, 15-950 Białystok, Poland
| | - Saidmukhtar Mavlyanov
- Institute of Bioorganic Chemistry, Academy of Sciences of Uzbekistan, Abdullaev 83, Tashkent, 100125 Uzbekistan
| | - Nodira Abdullajanova
- Institute of Bioorganic Chemistry, Academy of Sciences of Uzbekistan, Abdullaev 83, Tashkent, 100125 Uzbekistan
| | - Maksim Ionov
- Department of General Biophysics, University of Łódź, Banacha 12/16, 90-237 Łódź, Poland
| | - Maria Bryszewska
- Department of General Biophysics, University of Łódź, Banacha 12/16, 90-237 Łódź, Poland
| | - Maria Zamaraeva
- Department of Biophysics, University of Białystok, Świerkowa 20B, 15-950 Białystok, Poland
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57
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Ionov M, Garaiova Z, Waczulikova I, Wróbel D, Pędziwiatr-Werbicka E, Gomez-Ramirez R, de la Mata FJ, Klajnert B, Hianik T, Bryszewska M. siRNA carriers based on carbosilane dendrimers affect zeta potential and size of phospholipid vesicles. Biochimica et Biophysica Acta (BBA) - Biomembranes 2012; 1818:2209-16. [DOI: 10.1016/j.bbamem.2012.04.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 04/24/2012] [Accepted: 04/26/2012] [Indexed: 01/28/2023]
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Wrobel D, Kłys A, Ionov M, Vitovic P, Waczulikowa I, Hianik T, Gomez-Ramirez R, de la Mata J, Klajnert B, Bryszewska M. Cationic carbosilane dendrimers–lipid membrane interactions. Chem Phys Lipids 2012; 165:401-7. [DOI: 10.1016/j.chemphyslip.2012.01.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 01/25/2012] [Accepted: 01/27/2012] [Indexed: 01/04/2023]
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Wasiak T, Ionov M, Nieznanski K, Nieznanska H, Klementieva O, Granell M, Cladera J, Majoral JP, Caminade AM, Klajnert B. Phosphorus Dendrimers Affect Alzheimer’s (Aβ1–28) Peptide and MAP-Tau Protein Aggregation. Mol Pharm 2012; 9:458-69. [DOI: 10.1021/mp2005627] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Tomasz Wasiak
- Department of General Biophysics, University of Lodz, Poland
| | - Maksim Ionov
- Department of General Biophysics, University of Lodz, Poland
| | - Krzysztof Nieznanski
- Department of Biochemistry, Nencki Institute of Experimental Biology, Warsaw, Poland
| | - Hanna Nieznanska
- Department of Biochemistry, Nencki Institute of Experimental Biology, Warsaw, Poland
| | - Oxana Klementieva
- Department of Biochemistry and Molecular Biology, Autonomous University of Barcelona, Spain
| | - Maritxell Granell
- Department of Biochemistry and Molecular Biology, Autonomous University of Barcelona, Spain
| | - Josep Cladera
- Department of Biochemistry and Molecular Biology, Autonomous University of Barcelona, Spain
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Abramov AY, Ionov M, Pavlov E, Duchen MR. Membrane cholesterol content plays a key role in the neurotoxicity of β-amyloid: implications for Alzheimer's disease. Aging Cell 2011; 10:595-603. [PMID: 21332922 DOI: 10.1111/j.1474-9726.2011.00685.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Beta amyloid (βA) plays a central role in the pathogenesis of the most common and devastating neurodegenerative disorder, Alzheimer's disease (AD). The mechanisms of βA neurotoxicity remain controversial, but include dysregulation of calcium homeostasis and oxidative stress. A large body of data suggest that cholesterol plays a significant role in AD. In mixed cultures containing hippocampal neurons and astrocytes, we have shown that neurotoxic βA peptides (1-42 and 25-35) cause sporadic cytosolic calcium ([Ca(2+) ](c) ) signals in astrocytes but not in neurons, initiating a cascade that ends in neuronal death. We now show, using the cholesterol-sensitive fluorescent probe, Filipin, that membrane cholesterol is significantly higher in astrocytes than in neurons and mediates the selective response of astrocytes to βA. Thus, lowering [cholesterol] using mevastatin, methyl-β-cyclodextrin or filipin prevented the βA-induced [Ca(2+) ](c) signals, while increased membrane [cholesterol] increased βA-induced [Ca(2+) ](c) signals in both neurons and astrocytes. Addition of βA to lipid bilayers caused the appearance of a conductance that was significantly higher in membranes containing cholesterol. Increasing membrane [cholesterol] significantly increased βA-induced neuronal and astrocytic death. We conclude that a high membrane [cholesterol] promotes βA incorporation into membranes and increased [Ca(2+) ](c) leading to cell death.
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Affiliation(s)
- Andrey Y Abramov
- Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, UK.
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Gardikis K, Fessas D, Signorelli M, Dimas K, Tsimplouli C, Ionov M, Demetzos C. A new chimeric drug delivery nano system (chi-aDDnS) composed of PAMAM G 3.5 dendrimer and liposomes as doxorubicin's carrier. In vitro pharmacological studies. J Nanosci Nanotechnol 2011; 11:3764-72. [PMID: 21780367 DOI: 10.1166/jnn.2011.3847] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Chimeric advanced Drug Delivery nano Systems (chi-aDDnSs) could be defined as mixed nanosystems due to the combination process of nanobiomaterials and can offer advantages as drug carriers. The role of the release modulator from the liposomal system is undertaken by the dendrimer molecules leading to new pharmacokinetic and, probably, pharmacological properties of the chimeric system. In this work, a conventional DOPC/DPPG liposomal system and a new chi-aDDnS composed of liposomes (DOPC/DPPG) incorporating PAMAM G3,5 has been developed, Doxorubicin (Dox) was loaded in the systems and the final formulations were lyophilized. The physicochemical (spectroscopic and calorimetric) investigation concerning the chi-aDDnS, revealed a strong interaction between both lipophilic and hydrophilic parts of the liposomal membrane and the dendrimer, with the induction of multiple energetic states. These states are probably the basis of higher Dox encapsulation and slower release rate compared to the respective conventional liposome. These results, in conjunction with the increase in TI observed in two investigated cancer cell lines (i.e., MB231 and MCF7), compared to the respective conventional liposomal system and to the free Dox, make this new chi-aDDnS the basic candidate for further in vivo investigations.
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Affiliation(s)
- Konstantinos Gardikis
- University of Athens, School of Pharmacy, Department of Pharmaceutical Technology, Panepistimioupolis, Zografou, 15771 Athens, Greece
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Ionov M, Burchell V, Klajnert B, Bryszewska M, Abramov A. Mechanism of neuroprotection of melatonin against beta-amyloid neurotoxicity. Neuroscience 2011; 180:229-37. [DOI: 10.1016/j.neuroscience.2011.02.045] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2010] [Revised: 02/17/2011] [Accepted: 02/17/2011] [Indexed: 10/18/2022]
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Wrobel D, Ionov M, Gardikis K, Demetzos C, Majoral JP, Palecz B, Klajnert B, Bryszewska M. Interactions of phosphorus-containing dendrimers with liposomes. Biochim Biophys Acta Mol Cell Biol Lipids 2011; 1811:221-6. [DOI: 10.1016/j.bbalip.2010.11.007] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Revised: 11/18/2010] [Accepted: 11/19/2010] [Indexed: 12/19/2022]
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Sonkina S, Tukhfatullina II, Benseny-Cases N, Ionov M, Bryszewska M, Salakhutdinov BA, Cladera J. Interaction of the prion protein fragment PrP 185-206 with biological membranes: effect on membrane permeability. J Pept Sci 2010; 16:342-8. [PMID: 20552563 DOI: 10.1002/psc.1247] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Amyloids are proteinaceous aggregates related to the so-called conformational diseases, such as Alzheimer's and prion diseases. The cytotoxicity of amyloids may be related to the interaction of the amiloidogenic peptides or proteins with the cell membrane. In order to gain information on the physico-chemical effects of amyloids on membranes, we have studied the interaction of the human prion amyloidogenic fragment PrP 185-206 with negatively charged model membranes. The results show that the peptide causes the destabilization of the membrane, making it permeable to potassium ions and to charged organic compounds. This effect correlates with the interaction of the peptide with the membrane, causing a variation in the magnitude of the electrostatic surface and dipole membrane potentials. This effect on the electrostatic properties of the membranes may help explaining the observed permeability: a neutralization of the surface negative charge and a decrease of the inside-positive dipole potential would facilitate the translocation of positive ions. The structural analysis of the peptide in the presence of model membranes reveals that it adopts a predominantly unordered structure without any signs of amyloid formation. The results may be relevant in relation to the recently described cell toxic capacity of the peptide.
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Affiliation(s)
- Sabina Sonkina
- Laboratory of Physical and Chemical methods, Institute of Bioorganic Chemistry of Science Academy, Mirzo Ulugbek, 83, Tashkent, Uzbekistan
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Gardikis K, Hatziantoniou S, Bucos M, Fessas D, Signorelli M, Felekis T, Zervou M, Screttas CG, Steele BR, Ionov M, Micha-Screttas M, Klajnert B, Bryszewska M, Demetzos C. New Drug Delivery Nanosystem Combining Liposomal and Dendrimeric Technology (Liposomal Locked-In Dendrimers) for Cancer Therapy. J Pharm Sci 2010; 99:3561-71. [DOI: 10.1002/jps.22121] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ionov M, Gordiyenko N, Olchowik E, Baram N, Zijaev K, Salakhutdinov B, Bryszewska M, Zamaraeva M. The Immobilization of Gossypol Derivative on N-Polyvinylpyrrolidone Increases its Water Solubility and Modifies Membrane-Active Properties. J Med Chem 2009; 52:4119-25. [DOI: 10.1021/jm9002507] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Maksim Ionov
- Institute of Bioorganic Chemistry, Academy of Sciences, Tashkent, Uzbekistan
- Department of General Biophysics, University of Lodz, Lodz, Poland
| | | | - Ewa Olchowik
- Department of Biophysics, University of Bialystok, Swierkowa 20C, 159-50 Bialystok, Poland
| | - Nina Baram
- Institute of Bioorganic Chemistry, Academy of Sciences, Tashkent, Uzbekistan
| | - Khairulla Zijaev
- Institute of Bioorganic Chemistry, Academy of Sciences, Tashkent, Uzbekistan
| | | | - Maria Bryszewska
- Department of General Biophysics, University of Lodz, Lodz, Poland
| | - Maria Zamaraeva
- Department of Biophysics, University of Bialystok, Swierkowa 20C, 159-50 Bialystok, Poland
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Klajnert B, Cangiotti M, Calici S, Ionov M, Majoral JP, Caminade AM, Cladera J, Bryszewska M, Ottaviani MF. Interactions between dendrimers and heparin and their implications for the anti-prion activity of dendrimers. NEW J CHEM 2009. [DOI: 10.1039/b820632p] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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68
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Atanassova V, Ionov M, Rosmanova R, Simov V. [Prevention of anemia of prematurity]. Akush Ginekol (Sofiia) 2009; 48:23-26. [PMID: 20225493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Anemia of prematurity is seen in infants of less than 32 weeks' gestation. This anemia is due to low erythropoietin level and endogenous insufficiency of iron and vitamins. Administering of recombinant human erythropoietin, iron and vitamins in time is logic prevention alternative. The aim of our study is to examine the frequency of late haemotransfusions as an indicator of this prevention. We have investigated 181 children, who were born before the 32nd gestational week and who were distributed in two groups: group A (with prevention) and group B (without prevention). We found no significant difference in the frequency of the late transfusions between the two groups, but the results of the prevention in the most mature infants were better than those of the infants who were born before the 30th gestational week.
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69
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Klajnert B, Appelhans D, Komber H, Morgner N, Schwarz S, Richter S, Brutschy B, Ionov M, Tonkikh A, Bryszewska M, Voit B. The Influence of Densely Organized Maltose Shells on the Biological Properties of Poly(propylene imine) Dendrimers: New Effects Dependent on Hydrogen Bonding. Chemistry 2008; 14:7030-41. [DOI: 10.1002/chem.200800342] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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70
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Barzda V, Ionov M, van Amerongen H, Gussakovsky EE, Shahak Y. The effect of pea chloroplast alignment and variation of excitation wavelength on the circularly polarized chlorophyll luminescence. J Fluoresc 2004; 14:207-16. [PMID: 15615047 DOI: 10.1023/b:jofl.0000016293.52545.56] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Circularly polarized luminescence (CPL) is a powerful technique to study the macroorganization of photosynthetic light-harvesting apparatus in vivo and in vitro. It is particularly useful for monitoring environmental stress induced molecular re-organization of thylakoid membranes in green leaves. The current study focuses on two questions which are important to perform and interpret such experiments: how does CPL depend on the excitation wavelength and how on the orientation of the granal thylakoids. CPL and circular dichroism (CD) of pea chloroplasts were complementarily applied when chloroplasts were either in suspension or trapped in a polyacrylamide gel (PAAG) after alignment in a magnetic field. In contrast to the CD spectrum, the CPL signal was found to be independent of the excitation wavelength in both the Soret and the Qy absorption region for chloroplasts in both suspension and PAAG. The improved resolution of luminescence measurements revealed a relatively small negative CPL band in addition to the previously described large positive band. No effect of photoselection upon excitation on the CPL spectra was detected. The CPL intensity at 690 nm at the edge of the granal thylakoids was found to be higher than at the face of the grana suggesting the CPL anisotropy.
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Affiliation(s)
- Virginijus Barzda
- Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1081, Amsterdam, The Netherlands
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71
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Kovacheva K, Ahgelova L, Simeonova M, Tsankova G, Ionov M, Khristova V, Rosmanova R, Pandurski F, Slavov N, Stoĭkov S. [Active screening for genetic pathology in newborns. I. Registration of congenital abnormalities]. Akush Ginekol (Sofiia) 2004; 43:18-22. [PMID: 15185525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Active screening for genetic pathology over a period of 12 years (1990-2001) involved examination of 29,629 newborns at the Clinic of Obstetrics and Gynaecology. Congenital anomalies were detected in 1244 cases (live-, stillbirths and terminated pregnancies) which gives an average incidence rate of 42.0 per 1000 among the studied population. Congenital cardiac anomalies and CA of the central nervous system were the most common types of isolated CA. They provided frequencies of 7.76 per 1000 and 6.85 per 1000 cases respectively. The incidence of the neural tube defects (NTD), particularly, varied throughout the years (t = 2.69; p < 0.01) but stated high--on average 2.12 per 1000 with the highest rate of 3.89 per 1000 in 1993. A reduction in the incidence of NTD is possible with a recommendation of periconceptional folic acid supplementation. Registration of CA is a strategy for identifying families at risk to give births of child with CA. This approach enabled us to provide more accurate genetic counselling and prenatal diagnosis for genetic pathology. Active screening of newborn population is likely to be an effective and necessary service.
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Affiliation(s)
- K Kovacheva
- Medical Genetic Laboratory, University Hospital Pleven, Bulgaria
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72
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Kovacheva K, Simeonova M, Ionov M, Rosmanova R. [Congenital anomalies among live-birth infants and their place in the structure of neonatal mortality--the Higher Medical Institute, Pleven (1993-97)]. Akush Ginekol (Sofiia) 2001; 39:20-3. [PMID: 10948614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
The aim of the study was to determine the frequency of the congenital anomalies (CA) among the live-born (LB), the structure of the neonatal mortality (NM) and the impact of congenital anomalies on it. Congenital anomalies were found in 171 (2.71%) of 11,902 infants born and hospitalized at the Clinics of Neonatology--Pleven between 1993 and 1997. 171 (14.4% o) of all LB died in 28 day after delivery. Noninfectious lung pathology and CA were responsible for respectively 28.7% and 27.5% of these deaths and were the main causes of NM. Multiple congenital anomalies and CA of cardio-vascular system were the most frequent CA that caused these deaths. The major part of the CA with genetic basis (64%) emphasizes the importance of the registration of CA and the genetic counselling for declining the NM rate.
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73
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Lin SY, Ionov M, Okaya Y, Chiou DM, Le Noble WJ. Structure of (E)-2-ethynyl-2-methoxy-5-phenyladamantane. Acta Crystallogr B Struct Sci 1982. [DOI: 10.1107/s0567740882006797] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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