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Luponosov YN, Solodukhin AN, Aseyev NA, Rokitskaya TI, Kolotova DE, Kotova EA, Kurkin TS, Poletavkina LA, Isaeva YA, Antonenko YN, Balaban PM, Ponomarenko SA. Nanoparticles of Push-Pull Triphenylamine-Based Molecules for Light-Controlled Stimulation of Neuronal Activity. ACS Biomater Sci Eng 2024; 10:1139-1152. [PMID: 38241460 DOI: 10.1021/acsbiomaterials.3c01562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2024]
Abstract
Organic semiconductor materials with a unique set of properties are very attractive for interfacing biological objects and can be used for noninvasive therapy or detection of biological signals. Here, we describe the synthesis and investigation of a novel series of organic push-pull conjugated molecules with the star-shaped architecture, consisting of triphenylamine as a branching electron donor core linked through the thiophene π-spacer to electron-withdrawing alkyl-dicyanovinyl groups. The molecules could form stable aqueous dispersions of nanoparticles (NPs) without the addition of any surfactants or amphiphilic polymer matrixes with the average size distribution varying from 40 to 120 nm and absorption spectra very similar to those of human eye retina pigments such as rods and green cones. Variation of the terminal alkyl chain length of the molecules forming NPs from 1 to 12 carbon atoms was found to be an efficient tool to modulate their lipophilic and biological properties. Possibilities of using the NPs as light nanoactuators in biological systems or as artificial pigments for therapy of degenerative retinal diseases were studied both on the model planar bilayer lipid membranes and on the rat cortical neurons. In the planar bilayer system, the photodynamic activity of these NPs led to photoinactivation of ion channels formed by pentadecapeptide gramicidin A. Treatment of rat cortical neurons with the NPs caused depolarization of cell membranes upon light irradiation, which could also be due to the photodynamic activity of the NPs. The results of the work gave more insight into the mechanisms of light-controlled stimulation of neuronal activity and for the first time showed that fine-tuning of the lipophilic affinity of NPs based on organic conjugated molecules is of high importance for creating a bioelectronic interface for biomedical applications.
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Affiliation(s)
- Yuriy N Luponosov
- Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya st. 70, Moscow 117393, Russia
| | - Alexander N Solodukhin
- Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya st. 70, Moscow 117393, Russia
| | - Nikolay A Aseyev
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Butlerova 5A, Moscow 117485, Russia
| | - Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Vorobyevy Gory 1, Moscow 119991, Russia
| | - Darya E Kolotova
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Butlerova 5A, Moscow 117485, Russia
| | - Elena A Kotova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Vorobyevy Gory 1, Moscow 119991, Russia
| | - Tikhon S Kurkin
- Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya st. 70, Moscow 117393, Russia
| | - Liya A Poletavkina
- Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya st. 70, Moscow 117393, Russia
| | - Yulia A Isaeva
- Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya st. 70, Moscow 117393, Russia
| | - Yuri N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Vorobyevy Gory 1, Moscow 119991, Russia
| | - Pavel M Balaban
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Butlerova 5A, Moscow 117485, Russia
| | - Sergey A Ponomarenko
- Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya st. 70, Moscow 117393, Russia
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Firsov AM, Pfeffermann J, Benditkis AS, Rokitskaya TI, Kozlov AS, Kotova EA, Krasnovsky AA, Pohl P, Antonenko YN. Photodynamic activity rather than drilling causes membrane damage by a light-powered molecular nanomotor. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2023; 239:112633. [PMID: 36608401 DOI: 10.1016/j.jphotobiol.2022.112633] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/08/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
The chase toward endowing chemical compounds with machine-like functions mimicking those of biological molecular machineries has yielded a variety of artificial molecular motors (AMMs). Pharmaceutical applications of photoexcited monomolecular unidirectionally-rotating AMMs have been envisioned in view of their ability to permeabilize biological membranes. Nonetheless, the mechanical properties of lipid membranes render the proposed drilling activity of AMMs doubtful. Here, we show that singlet oxygen released by a photoexcited "molecular drill" oxidized unsaturated lipids composing giant unilamellar vesicles. In contrast, giant liposomes built of saturated lipids were inert to AMM photoactuation. The AMM did not mechanically destroy gramicidin A ion channels in planar bilayer lipid membranes but instead photoinactivated them. Sodium azide, a singlet oxygen quencher, reduced both AMM-mediated light-induced dye release from unsaturated large unilamellar vesicles and protected gramicidin A from photoinactivation. Upon additional consideration of the underlying bilayer mechanics, we conclude that AMMs' envisioned therapeutic and pharmaceutical applications rely on their photodynamic activity rather than their nanomechanical drilling abilities.
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Affiliation(s)
- Alexander M Firsov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Juergen Pfeffermann
- Institute of Biophysics, Johannes Kepler University Linz, Gruberstraße 40, 4020 Linz, Austria
| | - Anton S Benditkis
- Bach Institute of Biochemistry, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow 119071, Russia
| | - Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Anton S Kozlov
- Bach Institute of Biochemistry, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow 119071, Russia
| | - Elena A Kotova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Alexander A Krasnovsky
- Bach Institute of Biochemistry, Federal Research Center of Biotechnology, Russian Academy of Sciences, Moscow 119071, Russia
| | - Peter Pohl
- Institute of Biophysics, Johannes Kepler University Linz, Gruberstraße 40, 4020 Linz, Austria.
| | - Yuri N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russia.
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3
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Firsov AM, Franco MSF, Chistyakov DV, Goriainov SV, Sergeeva MG, Kotova EA, Fomich MA, Bekish AV, Sharko OL, Shmanai VV, Itri R, Baptista MS, Antonenko YN, Shchepinov MS. Deuterated polyunsaturated fatty acids inhibit photoirradiation-induced lipid peroxidation in lipid bilayers. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2022; 229:112425. [PMID: 35276579 DOI: 10.1016/j.jphotobiol.2022.112425] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 02/17/2022] [Accepted: 02/26/2022] [Indexed: 12/24/2022]
Abstract
Lipid peroxidation (LPO) plays a key role in many age-related neurodegenerative conditions and other disorders. Light irradiation can initiate LPO through various mechanisms and is of importance in retinal and dermatological pathologies. The introduction of deuterated polyunsaturated fatty acids (D-PUFA) into membrane lipids is a promising approach for protection against LPO. Here, we report the protective effects of D-PUFA against the photodynamically induced LPO, using illumination in the presence of the photosensitizer trisulfonated aluminum phthalocyanine (AlPcS3) in liposomes and giant unilamellar vesicles (GUV), as assessed in four experimental models: 1) sulforhodamine B leakage from liposomes, detected with fluorescence correlation spectroscopy (FCS); 2) formation of diene conjugates in liposomal membranes, measured by absorbance at 234 nm; 3) membrane leakage in GUV assessed by optical phase-contrast intensity observations; 4) UPLC-MS/MS method to detect oxidized linoleic acid (Lin)-derived metabolites. Specifically, in liposomes or GUV containing H-PUFA (dilinoleyl-sn-glycero-3-phosphatidylcholine), light irradiation led to an extensive oxidative damage to bilayers. By contrast, no damage was observed in lipid bilayers containing 20% or more D-PUFA (D2-Lin or D10-docosahexanenoic acid). Remarkably, addition of tocopherol increased the dye leakage from liposomes in H-PUFA bilayers compared to photoirradiation alone, signifying tocopherol's pro-oxidant properties. However, in the presence of D-PUFA the opposite effect was observed, whereby adding tocopherol increased the resistance to LPO. These findings suggest a method to augment the protective effects of D-PUFA, which are currently undergoing clinical trials in several neurological and retinal diseases that involve LPO.
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Affiliation(s)
- A M Firsov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia
| | - M S F Franco
- Biochemistry Department, Institute of Chemistry, University of São Paulo (IQUSP), AV. Professor Lineu Prestes avenue, 748, USP, CEP: 05508-000 São Paulo, Brazil
| | - D V Chistyakov
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia
| | - S V Goriainov
- SREC PFUR Peoples' Friendship University of Russia, Moscow, Russia
| | - M G Sergeeva
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia
| | - E A Kotova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia
| | - M A Fomich
- Institute of Physical Organic Chemistry, National Academy of Science, Minsk, Belarus
| | - A V Bekish
- Institute of Physical Organic Chemistry, National Academy of Science, Minsk, Belarus
| | - O L Sharko
- Institute of Physical Organic Chemistry, National Academy of Science, Minsk, Belarus
| | - V V Shmanai
- Institute of Physical Organic Chemistry, National Academy of Science, Minsk, Belarus
| | - R Itri
- Applied Physics Department, Institute of Physics, University of São Paulo, Rua do Matão, 1371 (217-B.Jafet), Butantã, USP, 05508-090 São Paulo, Brazil
| | - M S Baptista
- Biochemistry Department, Institute of Chemistry, University of São Paulo (IQUSP), AV. Professor Lineu Prestes avenue, 748, USP, CEP: 05508-000 São Paulo, Brazil.
| | - Y N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Russia
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Kondrashov OV, Rokitskaya TI, Batishchev OV, Kotova EA, Antonenko YN, Akimov SA. Peptide-induced membrane elastic deformations decelerate gramicidin dimer-monomer equilibration. Biophys J 2021; 120:5309-5321. [PMID: 34715080 DOI: 10.1016/j.bpj.2021.10.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 09/23/2021] [Accepted: 10/22/2021] [Indexed: 10/20/2022] Open
Abstract
Gramicidin A (gA) is a hydrophobic pentadecapeptide readily incorporating into a planar bilayer lipid membrane (BLM), thereby inducing a large macroscopic current across the BLM. This current results from ion-channel formation due to head-to-head transbilayer dimerization of gA monomers with rapidly established monomer-dimer equilibrium. Any disturbance of the equilibrium, e.g., by sensitized photoinactivation of a portion of gA monomers, causes relaxation toward a new equilibrium state. According to previous studies, the characteristic relaxation time of the gA-mediated electric current decreases as the current increases upon elevating the gA concentration in the membrane. Here, we report data on the current relaxation kinetics for gA analogs with N-terminal valine replaced by glycine or tyrosine. Surprisingly, the relaxation time increased rather than decreased upon elevation of the total membrane conductance induced by these gA analogs, thus contradicting the classical kinetic scheme. We developed a general theoretical model that accounts for lateral interaction of monomers and dimers mediated by membrane elastic deformations. The modified kinetic scheme of the gramicidin dimerization predicts the reverse dependence of the relaxation time on membrane conductance for gA analogs, with a decreased dimerization constant that is in a good agreement with our experimental data. The equilibration process may be also modulated by incorporation of other peptides ("impurities") into the lipid membrane.
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Affiliation(s)
- Oleg V Kondrashov
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Oleg V Batishchev
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia
| | - Elena A Kotova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Yuri N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.
| | - Sergey A Akimov
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia.
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Jiménez-Munguía I, Fedorov AK, Abdulaeva IA, Birin KP, Ermakov YA, Batishchev OV, Gorbunova YG, Sokolov VS. Lipid Membrane Adsorption Determines Photodynamic Efficiency of β-Imidazolyl-Substituted Porphyrins. Biomolecules 2019; 9:E853. [PMID: 31835568 PMCID: PMC6995582 DOI: 10.3390/biom9120853] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 12/04/2019] [Accepted: 12/07/2019] [Indexed: 11/16/2022] Open
Abstract
Photosensitizers (PSs) represent a group of molecules capable of generating reactive oxygen species (ROS), such as singlet oxygen (SO); thus, they are considered to be promising agents for anti-cancer therapy. The enhancement of the photodynamic efficiency of these compounds requires increasing the PS activity in the cancer cell milieu and exactly at the target cells. In the present work, we report the synthesis, lipid membrane binding and photodynamic activity of three novel cationic PSs based on β-imidazolyl-substituted porphyrin and its Zn(II) and In(III) complexes (1H2, 1Zn and 1In). Comparison of the behavior of the investigated porphyrins at the bilayer lipid membrane (BLM) demonstrated the highest adsorption for the 1In complex and the lowest one for 1Zn. The photodynamic efficiency of these porphyrins was evaluated by determining the oxidation rate of the styryl dye, di-4-ANEPPS, incorporated into the lipid membrane. These rates were proportional to the surface density (SD) of the porphyrin molecules at the BLM and were roughly the same for all three porphyrins. This indicates that the adsorption of these porphyrins at the BLM determines their photodynamic efficiency rather than the extinction or quantum yield of singlet oxygen.
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Affiliation(s)
- Irene Jiménez-Munguía
- National University of Science and Technology “MISiS”, 4 Leninskiy pr. 119049 Moscow, Russia
| | - Arseniy K. Fedorov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy pr. 119071 Moscow, Russia; (A.K.F.); (I.A.A.); (K.P.B.); (Y.A.E.); (O.V.B.); (V.S.S.)
| | - Inna A. Abdulaeva
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy pr. 119071 Moscow, Russia; (A.K.F.); (I.A.A.); (K.P.B.); (Y.A.E.); (O.V.B.); (V.S.S.)
| | - Kirill P. Birin
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy pr. 119071 Moscow, Russia; (A.K.F.); (I.A.A.); (K.P.B.); (Y.A.E.); (O.V.B.); (V.S.S.)
| | - Yury A. Ermakov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy pr. 119071 Moscow, Russia; (A.K.F.); (I.A.A.); (K.P.B.); (Y.A.E.); (O.V.B.); (V.S.S.)
| | - Oleg V. Batishchev
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy pr. 119071 Moscow, Russia; (A.K.F.); (I.A.A.); (K.P.B.); (Y.A.E.); (O.V.B.); (V.S.S.)
- Moscow Institute of Physics and Technology, 9 Institutskiy Lane, Dolgoprudniy, 141700 Moscow Region, Russia
| | - Yulia G. Gorbunova
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy pr. 119071 Moscow, Russia; (A.K.F.); (I.A.A.); (K.P.B.); (Y.A.E.); (O.V.B.); (V.S.S.)
- N. S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninskiy pr. 119119 Moscow, Russia
| | - Valerij S. Sokolov
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31/4 Leninskiy pr. 119071 Moscow, Russia; (A.K.F.); (I.A.A.); (K.P.B.); (Y.A.E.); (O.V.B.); (V.S.S.)
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Popova LB, Kamysheva AL, Rokitskaya TI, Korshunova GA, Kirsanov RS, Kotova EA, Antonenko YN. Protonophoric and Photodynamic Effects of Fluorescein Decyl(triphenyl)phosphonium Ester on the Electrical Activity of Pond Snail Neurons. BIOCHEMISTRY (MOSCOW) 2019; 84:1151-1165. [DOI: 10.1134/s0006297919100043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lebedeva NS, Gubarev YA, Zakharova GV, Koifman OI. The Condition of Metal Complexes of Tetraanthraquinoneporphyrazines in Solutions. RUSS J GEN CHEM+ 2019. [DOI: 10.1134/s1070363219030435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Photodynamic damage to erythrocytes and liposomes sensitized by chlorophyll a derivatives. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2249-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Konstantinova AN, Sokolov VS, Jiménez-Munguía I, Finogenova OA, Ermakov YA, Gorbunova YG. Adsorption and photodynamic efficiency of meso-tetrakis(p-sulfonatophenyl)porphyrin on the surface of bilayer lipid membranes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 189:74-80. [PMID: 30316028 DOI: 10.1016/j.jphotobiol.2018.10.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 09/28/2018] [Accepted: 10/01/2018] [Indexed: 10/28/2022]
Abstract
The adsorption and photodynamic efficiency of 5,10,15,20-tetrakis(p-sulfonatophenyl)porphyrin (H2TPPS4) on bilayer lipid membranes (BLM) have been studied. The adsorption of H2TPPS4 on BLM leads to rising of the potential drop on the membrane/water interface which has been detected either by the intramembrane field compensation (IFC) method, or as ζ-potential of liposomes measured by the dynamic light scattering method. The dependence of this potential on the concentration of H2TPPS4 and KCl in the solution can be described in the frame of Gouy-Chapman model of diffuse double layer assuming that the molecules of H2TPPS4 adsorb on the surface of BLM as an anions with four charged groups. The potential disappeared when the pH of solution decreased from 6 to 3 allowing the conclusion that the protonated forms of H2TPPS4 can not adsorb on the BLM probably due to change of conformation or aggregation of the molecules. The photodynamic efficiency of H2TPPS4 was evaluated by measuring the rate of damage of the targets - molecules of styryl dye (di-4-ANEPPS) by singlet oxygen generated under illumination on the surface of BLM. This rate was proportional to the surface density of H2TPPS4 molecules on the membrane which was determined from the change of surface charge of the membrane due to adsorption of the H2TPPS4. These results indicate that the di-4-ANEPPS molecules are damaged by singlet oxygen generated by monomers of H2TPPS4 molecules adsorbed on the membrane. The rate of oxidation of di-4-ANEPPS molecules adsorbed on the same (cis) side of the membrane together with the H2TPPS4 molecules was either the same or higher than that when di-4-ANEPPS molecules were adsorbed on opposite (trans) side. It indicates that the quenching of singlet oxygen by the di-4-ANEPPS molecules at cis side of the membrane was negligible, in contrast to our earlier study when singlet oxygen was generated by aluminum(III) phthalocyanines with one or two peripheral sulfo groups. The difference between these phthalocyanines and H2TPPS4 was explained by their different adsorption depth in the membrane.
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Affiliation(s)
- A N Konstantinova
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninskiy pr., 31, bldg.4, Moscow 119071, Russia
| | - V S Sokolov
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninskiy pr., 31, bldg.4, Moscow 119071, Russia.
| | - I Jiménez-Munguía
- National University of Science and Technology MISiS, Leninskiy pr., 4, Moscow 119049, Russia
| | - O A Finogenova
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninskiy pr., 31, bldg.4, Moscow 119071, Russia
| | - Yu A Ermakov
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninskiy pr., 31, bldg.4, Moscow 119071, Russia
| | - Yu G Gorbunova
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Leninskiy pr., 31, bldg.4, Moscow 119071, Russia; N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Science, Leninskiy pr., 31, Moscow 119991, Russia
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Abstract
Photodynamic therapy uses photosensitizers (PS) to kill cancer cells by generating reactive oxygen species – like singlet oxygen (SO) - upon illumination with visible light. PS membrane anchoring augments local SO concentration, which in turn increases photodynamic efficiency. The latter may suffer from SO’s escape into the aqueous solution or premature quenching. Here we determined the time constants of SO escape and quenching by target molecules to be in the nanosecond range, the former being threefold longer. We confined PS and dipolar target molecules either to different membrane monolayers or to the same leaflet and assessed their abundance by fluorescence correlation spectroscopy or membrane surface potential measurements. The rate at which the contribution of the dipolar target molecules to membrane dipole potential vanished, served as a measure of the photo-oxidation rate. The solution of the reaction–diffusion equations did not indicate diffusional rate limitations. Nevertheless, reducing the PS-target distance increased photodynamic efficiency by preventing other SO susceptible moieties from protecting the target. Importantly, our analytical model revealed a fourfold difference between SO generation rates per molecule of the two used PSs. Such analysis of PS quantum yield in a membrane environment may help in designing better PSs.
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11
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Rwei AY, Paris JL, Wang B, Wang W, Axon CD, Vallet-Regí M, Langer R, Kohane DS. Ultrasound-triggered local anaesthesia. Nat Biomed Eng 2017; 1:644-653. [PMID: 29152410 PMCID: PMC5687284 DOI: 10.1038/s41551-017-0117-6] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 06/27/2017] [Indexed: 01/09/2023]
Abstract
On-demand relief of local pain would allow patients to control the timing, intensity and duration of nerve block in a safe and non-invasive manner. Ultrasound would be a suitable trigger for such a system, as it is in common clinical use and can penetrate deeply into the body. Here, we demonstrate that ultrasound-triggered delivery of an anaesthetic from liposomes allows the timing, intensity and duration of nerve block to be controlled by ultrasound parameters. On insonation, the encapsulated sonosensitizer protoporphyrin IX produces reactive oxygen species that react with the liposomal membrane, leading to the release of the potent local anaesthetic tetrodotoxin. We also show repeatable ultrasound-triggered nerve blocks in vivo, with nerve-block duration depending on the extent and intensity of insonation. We did not detect any systemic toxicity, and tissue reaction was benign in all groups. On-demand, personalized local anaesthesia could be beneficial for the managing of relatively localized pain states, and potentially minimize opioid use.
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Affiliation(s)
- Alina Y Rwei
- Department of Anaesthesiology, Boston Children's Hospital, Boston, MA, 02115, USA
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Juan L Paris
- Dpto. Química Inorgánica y Bioinorgánica, Facultad de Farmacia, UCM, Instituto de Investigación Sanitaria Hospital 12 de Octubre i+12, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Avenida Monforte de Lemos, 3-5, 28029, Madrid, Spain
| | - Bruce Wang
- Department of Anaesthesiology, Boston Children's Hospital, Boston, MA, 02115, USA
| | - Weiping Wang
- Dr Li Dak-Sum Research Centre, The University of Hong Kong-Karolinska Institutet Collaboration in Regenerative Medicine, The University of Hong Kong, Hong Kong, China
| | - Christopher D Axon
- Department of Anaesthesiology, Boston Children's Hospital, Boston, MA, 02115, USA
| | - María Vallet-Regí
- Dpto. Química Inorgánica y Bioinorgánica, Facultad de Farmacia, UCM, Instituto de Investigación Sanitaria Hospital 12 de Octubre i+12, 28040, Madrid, Spain
- Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Avenida Monforte de Lemos, 3-5, 28029, Madrid, Spain
| | - Robert Langer
- David H. Koch Institutes for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Daniel S Kohane
- Department of Anaesthesiology, Boston Children's Hospital, Boston, MA, 02115, USA.
- Laboratory for Biomaterials and Drug Delivery, Harvard Medical School, Boston, MA, 02115, USA.
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Abramczyk H, Brozek-Pluska B, Surmacki J, Tondusson M, Freysz E. Photostability of biological systems—Femtosecond dynamics of zinc tetrasulfonated phthalocyanine at cancerous and noncancerous human Breast tissues. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.08.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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13
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Photodynamic treatment with phenothiazinium photosensitizers kills both ungerminated and germinated microconidia of the pathogenic fungi Fusarium oxysporum, Fusarium moniliforme and Fusarium solani. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 164:1-12. [DOI: 10.1016/j.jphotobiol.2016.09.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 09/05/2016] [Accepted: 09/06/2016] [Indexed: 12/20/2022]
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14
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Sokolov VS, Gavrilchik AN, Kulagina AO, Meshkov IN, Pohl P, Gorbunova YG. Voltage-sensitive styryl dyes as singlet oxygen targets on the surface of bilayer lipid membrane. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 161:162-9. [PMID: 27236238 DOI: 10.1016/j.jphotobiol.2016.05.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 05/18/2016] [Indexed: 11/30/2022]
Abstract
Photosensitizers are widely used as photodynamic therapeutic agents killing cancer cells by photooxidation of their components. Development of new effective photosensitive molecules requires profound knowledge of possible targets for reactive oxygen species, especially for its singlet form. Here we studied photooxidation of voltage-sensitive styryl dyes (di-4-ANEPPS, di-8-ANEPPS, RH-421 and RH-237) by singlet oxygen on the surface of bilayer lipid membranes commonly used as cell membrane models. Oxidation was induced by irradiation of a photosensitizer (aluminum phthalocyanine tetrasulfonate) and monitored by the change of dipole potential on the surface of the membrane. We studied the drop of the dipole potential both in the case when the dye molecules were adsorbed on the same side of the lipid bilayer as the photosensitizer (cis-configuration) and in the case when they were adsorbed on the opposite side (trans-configuration). Based on a simple model, we determined the rate of oxidation of the dyes from the kinetics of change of the potential during and after irradiation. This rate is proportional to steady-state concentration of singlet oxygen in the membrane under irradiation. Comparison of the oxidation rates of various dyes reveals that compounds of ANEPPS series are more sensitive to singlet oxygen than RH type dyes, indicating that naphthalene group is primarily responsible for their oxidation.
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Affiliation(s)
- V S Sokolov
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Moscow, Russia.
| | - A N Gavrilchik
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Moscow, Russia
| | - A O Kulagina
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Moscow, Russia
| | - I N Meshkov
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Moscow, Russia
| | - P Pohl
- Institute of Biophysics, Johannes Kepler University Linz, Austria
| | - Yu G Gorbunova
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Science, Moscow, Russia; N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Science, Moscow, Russia
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15
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Rokitskaya TI, Antonenko YN. Fullerenol C60(OH)24 increases ion permeability of lipid membranes in a pH-dependent manner. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:1165-74. [PMID: 26874205 DOI: 10.1016/j.bbamem.2016.02.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 01/07/2016] [Accepted: 02/09/2016] [Indexed: 02/07/2023]
Abstract
Fullerenols are water-soluble analogs of fullerene exhibiting both antioxidant and prooxidant activities in vitro and in vivo. Here we report, for the first time, that fullerenol C60(OH)24 can induce ion permeability of a planar lipid bilayer membrane via the formation of ion pores or conductive defects with a preference for cations over anions. The fullerenol-mediated electrical current displayed non-linear concentration dependence and was reversibly enhanced by alkalinization. Calcium and magnesium ions decreased the fullerenol-induced potassium ion permeability. Voltage dependence of the current was sensitive to membrane composition, with the conductance being well pronounced in fully saturated diphytanoylphosphatidylcholine. Fullerenol did not induce carboxyfluorescein leakage from liposomes, suggesting a small size of fullerenol-induced pores. In contrast to ion permeability, the binding of C60(OH)24 to liposomes increased at acidic pH, as measured by fluorescence quenching of pyrene-labeled lipid. In line with this, the photodynamic action of fullerenol on the peptide gramicidin A also increased at low pH. It is hypothesized that aggregates of fullerenol may stabilize transient conductive lipid defects or pores formed under a variety of stress conditions.
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Affiliation(s)
- Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
| | - Yuri N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
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16
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Bacellar IOL, Tsubone TM, Pavani C, Baptista MS. Photodynamic Efficiency: From Molecular Photochemistry to Cell Death. Int J Mol Sci 2015; 16:20523-59. [PMID: 26334268 PMCID: PMC4613217 DOI: 10.3390/ijms160920523] [Citation(s) in RCA: 243] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 08/18/2015] [Accepted: 08/24/2015] [Indexed: 12/11/2022] Open
Abstract
Photodynamic therapy (PDT) is a clinical modality used to treat cancer and infectious diseases. The main agent is the photosensitizer (PS), which is excited by light and converted to a triplet excited state. This latter species leads to the formation of singlet oxygen and radicals that oxidize biomolecules. The main motivation for this review is to suggest alternatives for achieving high-efficiency PDT protocols, by taking advantage of knowledge on the chemical and biological processes taking place during and after photosensitization. We defend that in order to obtain specific mechanisms of cell death and maximize PDT efficiency, PSes should oxidize specific molecular targets. We consider the role of subcellular localization, how PS photochemistry and photophysics can change according to its nanoenvironment, and how can all these trigger specific cell death mechanisms. We propose that in order to develop PSes that will cause a breakthrough enhancement in the efficiency of PDT, researchers should first consider tissue and intracellular localization, instead of trying to maximize singlet oxygen quantum yields in in vitro tests. In addition to this, we also indicate many open questions and challenges remaining in this field, hoping to encourage future research.
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Affiliation(s)
- Isabel O L Bacellar
- Instituto de Química, Universidade de São Paulo, São Paulo 05508-900, Brazil.
| | - Tayana M Tsubone
- Instituto de Química, Universidade de São Paulo, São Paulo 05508-900, Brazil.
| | - Christiane Pavani
- Programa de Pós Graduação em Biofotônica Aplicada às Ciências da Saúde, Universidade Nove de Julho, São Paulo 01504-001, Brazil.
| | - Mauricio S Baptista
- Instituto de Química, Universidade de São Paulo, São Paulo 05508-900, Brazil.
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17
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Rokitskaya TI, Firsov AM, Kotova EA, Antonenko YN. Photodynamic inactivation of gramicidin channels in bilayer lipid membranes: Protective efficacy of singlet oxygen quenchers depends on photosensitizer location. BIOCHEMISTRY (MOSCOW) 2015; 80:745-51. [DOI: 10.1134/s0006297915060097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Fuentealba D, López JJ, Palominos M, Salas CO, Soto-Arriaza MA. Gramicidin conformational changes during riboflavin photosensitized oxidation in solution and the effect of N-methylation of tryptophan residues. Photochem Photobiol Sci 2015; 14:748-56. [DOI: 10.1039/c4pp00414k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
During riboflavin mediated photo-oxidation, gramicidin changes from intertwined to monomeric conformation (disaggregation), while the methylated derivative is not photo-oxidized.
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Affiliation(s)
- Denis Fuentealba
- Laboratorio de Química Biológica
- Departamento de Química Física
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
| | - Jhon J. López
- Departamento de Química Orgánica
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Marco Palominos
- Laboratorio de Química Biológica
- Departamento de Química Física
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
| | - Cristian O. Salas
- Departamento de Química Orgánica
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Marco A. Soto-Arriaza
- Laboratorio de Química Biológica
- Departamento de Química Física
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
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19
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Bacellar IOL, Pavani C, Sales EM, Itri R, Wainwright M, Baptista MS. Membrane Damage Efficiency of Phenothiazinium Photosensitizers. Photochem Photobiol 2014; 90:801-13. [DOI: 10.1111/php.12264] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Accepted: 02/21/2014] [Indexed: 12/31/2022]
Affiliation(s)
- Isabel O. L. Bacellar
- Departamento de Bioquímica; Instituto de Química; Universidade de São Paulo; São Paulo Brasil
| | - Christiane Pavani
- Departamento de Bioquímica; Instituto de Química; Universidade de São Paulo; São Paulo Brasil
| | - Elisa M. Sales
- Departamento de Física Aplicada; Instituto de Física; Universidade de São Paulo; São Paulo Brasil
- Instituto de Pesquisas Tecnológicas do Estado de São Paulo; São Paulo Brasil
| | - Rosangela Itri
- Departamento de Física Aplicada; Instituto de Física; Universidade de São Paulo; São Paulo Brasil
| | - Mark Wainwright
- School of Pharmacy and Biomolecular Sciences; Liverpool John Moores University; Liverpool UK
| | - Mauricio S. Baptista
- Departamento de Bioquímica; Instituto de Química; Universidade de São Paulo; São Paulo Brasil
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20
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Rokitskaya TI, Kotova EA, Agapov II, Moisenovich MM, Antonenko YN. Unsaturated lipids protect the integral membrane peptide gramicidin A from singlet oxygen. FEBS Lett 2014; 588:1590-5. [PMID: 24613917 DOI: 10.1016/j.febslet.2014.02.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 02/10/2014] [Accepted: 02/17/2014] [Indexed: 10/25/2022]
Abstract
In contrast to expectations that unsaturated fatty acids contribute to oxidative stress by providing a source of lipid peroxides, we demonstrated the protective effect of double bonds in lipids on oxidative damage to membrane proteins. Photodynamic inactivation of gramicidin channels was decreased in unsaturated lipid compared to saturated lipid bilayers. By estimating photosensitizer (boronated chlorine e6 amide) binding to the membrane with the current relaxation technique, the decrease in gramicidin photoinactivation was attributed to singlet oxygen scavenging by double bonds in lipids rather than to the reduction in photosensitizer binding. Gramicidin protection by unsaturated lipids was also observed upon induction of oxidative stress with tert-butyl hydroperoxide.
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Affiliation(s)
- Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russian Federation.
| | - Elena A Kotova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Igor I Agapov
- Biological Department, Lomonosov Moscow State University, Moscow, Russian Federation; Academician V.I.Shumakov Federal Research Center of Transplantology and Artificial Organs, Moscow, Russian Federation
| | - Mikhail M Moisenovich
- Biological Department, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Yuri N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russian Federation
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21
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Antonenko YN, Kotova EA, Omarova EO, Rokitskaya TI, Ol'shevskaya VA, Kalinin VN, Nikitina RG, Osipchuk JS, Kaplan MA, Ramonova AA, Moisenovich MM, Agapov II, Kirpichnikov MP. Photodynamic activity of the boronated chlorin e6 amide in artificial and cellular membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:793-801. [DOI: 10.1016/j.bbamem.2013.11.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 11/15/2013] [Accepted: 11/18/2013] [Indexed: 12/18/2022]
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22
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Kawai C, Araújo-Chaves JC, Magrini T, Sanches COCC, Pinto SMS, Martinho H, Daghastanli N, Nantes IL. Photodamage in a mitochondrial membrane model modulated by the topology of cationic and anionic meso-tetrakis porphyrin free bases. Photochem Photobiol 2014; 90:596-608. [PMID: 24351019 DOI: 10.1111/php.12228] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 12/09/2013] [Indexed: 11/30/2022]
Abstract
The photodynamic effects of the cationic TMPyP (meso-tetrakis [N-methyl-4-pyridyl]porphyrin) and the anionic TPPS4 (meso-tetrakis[4-sulfonatophenyl]porphyrin) against PC/CL phosphatidylcholine/cardiolipin (85/15%) membranes were probed to address the influence of phorphyrin binding on lipid damage. Electronic absorption spectroscopy and zeta potential measurements demonstrated that only TMPyP binds to PC/CL large unilamellar vesicles (LUVs). The photodamage after irradiation with visible light was analyzed by dosages of lipid peroxides (LOOH) and thiobarbituric reactive substance and by a contrast phase image of the giant unilamellar vesicles (GUVs). Damage to LUVs and GUVs promoted by TMPyP and TPPS4 were qualitatively and quantitatively different. The cationic porphyrin promoted damage more extensive and faster. The increase in LOOH was higher in the presence of D2O, and was impaired by sodium azide and sorbic acid. The effect of D2O was higher for TPPS4 as the photosensitizer. The use of DCFH demonstrated that liposomes prevent the photobleaching of TMPyP. The results are consistent with a more stable TMPyP that generates long-lived singlet oxygen preferentially partitioned in the bilayer. Conversely, TPPS4 generates singlet oxygen in the bulk whose lifetime is increased in D2O. Therefore, the affinity of the porphyrin to the membrane modulates the rate, type and degree of lipid damage.
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Affiliation(s)
- Cintia Kawai
- Centro de Ciências Naturais e Humanas (CCNH), Universidade Federal do ABC, Santo André, SP, Brazil
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23
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Randles EG, Bergethon PR. A photodependent switch of liposome stability and permeability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1490-1497. [PMID: 23286452 DOI: 10.1021/la303526k] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Liposomes offer a method to encapsulate high concentrations of a drug, protecting the therapeutic upon in vivo administration. With an appropriate mechanism to manipulate lipid bilayer permeability, liposomes have the potential to deliver encapsulated drugs in a spatially and temporally controlled manner. In this investigation, the photosensitizer aluminum phthalocyanine disulfonic acid (AlPcS(2)) is identified as a modulator of the colloidal properties of liposomes. AlPcS(2) adsorption to liposomes stabilizes lipid bilayers and reduces permeability. Spectroscopic data suggests that AlPcS(2) interacts with the phospholipid to increase lipid bilayer stability. In the presence of AlPcS(2), the liposome permeability was five times lower than that without the photosensitizer. This results in more stable liposome systems that contain higher doses of the encapsulated material for longer. Then, upon irradiation of the AlPcS(2)-liposome system with tissue penetrating red light, lipid bilayer permeability increases 10-fold over the baseline. The release is shown to be a singlet oxygen mediated process, due to the type II photodynamic action of AlPcS(2). It is concluded that this activity provides a novel photorelease mechanism for liposome mediated drug delivery.
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Affiliation(s)
- Edward G Randles
- Department of Biochemistry, Laboratory for Intelligence Modeling & Neurophysics, Boston University School of Medicine, 650 Albany St., X-140, Boston, Massachusetts 02118, United States.
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24
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Fullove TP, Johnson B, Yu H. Structure-dependent lipid peroxidation by photoirradiation of pyrene and its mono-substituted derivatives. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2013; 48:233-41. [PMID: 23245298 PMCID: PMC3939684 DOI: 10.1080/10934529.2013.729998] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Pyrene, one of the most studied polycyclic aromatic hydrocarbons, can damage biological macromolecules and cause toxicity when irradiated by light. The effect of substituents, 1-amino, 1-hydroxy, 1-nitro, and 1-bromo, on light-induced lipid peroxidation is studied. Degradation kinetics and photoproduct analyses were conducted to test how these substituents affect the photoreaction. All five compounds have widely different photodegradation rates, with degradation half-lives, ranging from 8 min to 495 min. These rates parallel their light absorptivity. Four out of the five compounds induce lipid peroxidation when irradiated with UVA light, whereas 1-aminopyrene causes minimum or no lipid peroxidation. The relative amount of lipid peroxidation caused is: 1-bromopyrene > pyrene > 1-nitropyrene ≈ 1-hydroxypyrene > 1-aminopyrene. This relative lipid peroxidation is dependent on the substituent due to the following factors: light absorptivity, relative rates of the competing processes in the excited states, nature of the photoreaction, and nature of the photoproducts.
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Affiliation(s)
- Tracie Perkins Fullove
- Department of Chemistry and Biochemistry, Jackson State University, Jackson, Mississippi, USA
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25
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Electrostatically induced recruitment of membrane peptides into clusters requires ligand binding at both interfaces. PLoS One 2012; 7:e52839. [PMID: 23285199 PMCID: PMC3528705 DOI: 10.1371/journal.pone.0052839] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Accepted: 11/23/2012] [Indexed: 02/01/2023] Open
Abstract
Protein recruitment to specific membrane locations may be governed or facilitated by electrostatic attraction, which originates from a multivalent ligand. Here we explored the energetics of a model system in which this simple electrostatic recruitment mechanism failed. That is, basic poly-L-lysine binding to one leaflet of a planar lipid bilayer did not recruit the triply-charged peptide (O-Pyromellitylgramicidin). Clustering was only observed in cases where PLL was bound to both channel ends. Clustering was indicated (i) by the decreased diffusional PLL mobility DPLL and (ii) by an increased lifetime τPLL of the clustered channels. In contrast, if PLL was bound to only one leaflet, neither DPLL nor τP changed. Simple calculations suggest that electrostatic repulsion of the unbound ends prevented neighboring OPg dimers from approaching each other. We believe that a similar mechanism may also operate in cell signaling and that it may e.g. contribute to the controversial results obtained for the ligand driven dimerization of G protein-coupled receptors.
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26
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Suryo Rahmanto A, Pattison DI, Davies MJ. Photo-oxidation-induced inactivation of the selenium-containing protective enzymes thioredoxin reductase and glutathione peroxidase. Free Radic Biol Med 2012; 53:1308-16. [PMID: 22884457 DOI: 10.1016/j.freeradbiomed.2012.07.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 07/10/2012] [Accepted: 07/17/2012] [Indexed: 10/28/2022]
Abstract
Singlet oxygen ((1)O(2)) is a reactive oxygen species generated during photo-oxidation, inflammation, and via peroxidase-catalyzed reactions (e.g., myeloperoxidase and eosinophil peroxidase). (1)O(2) oxidizes the free amino acids Trp, Tyr, His, Cys, and Met, and those species present on peptides/proteins, with this resulting in modulation of protein structure and function. Impairment of the activity of antioxidant enzymes may be of relevance to the oxidative stress observed in a number of pathologies involving either light exposure or inflammation. In this study, the effects of (1)O(2) on glutathione peroxidase (GPx) and thioredoxin reductase (TrxR) activity, including the mechanisms of their inactivation, were investigated. Exposure of GPx or TrxR, either as purified proteins or in cell lysates, to Rose Bengal and visible light (an established source of (1)O(2)) resulted in significant, photolysis time-dependent reductions in enzyme activity (10-40%, P<0.05). More extensive inhibition (ca. 2-fold) was detected when the reactions were carried out in D(2)O, consistent with the intermediacy of (1)O(2). No additional inhibition was detected after the cessation of photolysis, eliminating a role for photo-products. Methionine, which reacts rapidly with (1)O(2) (k~10(7)M(-1) s(-1))(,) significantly reduced photo-inactivation at large molar excesses, presumably by acting as an alternative target. Reductants (NaBH(4), DTT, GSH, or NADPH) added after the cessation of (1)O(2) formation were unable to reverse enzyme inactivation, consistent with irreversible enzyme oxidation. Formation of nonreducible protein aggregates and/or fragments was detected for both photo-oxidized GPx and TrxR by SDS-PAGE. An oxidant concentration-dependent increase in protein carbonyls was detected with TrxR but not GPx. These studies thus demonstrate that the antioxidant enzymes GPx and TrxR can be irreversibly inactivated by (1)O(2).
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27
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Rubio N, Martínez-Junza V, Estruga J, Borrell JI, Mora M, Sagristá ML, Nonell S. Ground- and excited-state interactions of 2,7,12,17-tetraphenylporphycene with model target biomolecules for type-I photodynamic therapy. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424609000103] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Biosubstrate-sensitizer binding is one of the factors that enhances the type-I mechanism over the type-II in the whole photodynamic process. 2,7,12,17-Tetraphenylporphycene (TPPo), a second-generation photosensitizer, is a hydrophobic compound with good photophysical properties for photodynamic therapy applications that has proved its ability for the photoinactivation of different cell lines. Nevertheless, little is known about its mechanism of action. This paper focuses on the study of the interaction/binding of TPPo with different model biomolecules that may favor the type-I mechanism in the overall photodynamic process, including nucleosides, proteins, and phospholipids. Compared with more hydrophilic photosensitizers, it is concluded that TPPo is more likely to undergo type-II (singlet oxygen) than type-I (electron transfer) photodynamic processes in biological environments.
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Affiliation(s)
- Noemí Rubio
- Grup d'Enginyeria Molecular, Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain
| | - Víctor Martínez-Junza
- Grup d'Enginyeria Molecular, Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain
| | - Jordi Estruga
- Grup d'Enginyeria Molecular, Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain
| | - José I. Borrell
- Grup d'Enginyeria Molecular, Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain
| | - Margarita Mora
- Departament de Bioquímica i Biología Molecular, Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal 645, 08028 Barcelona, Spain
| | - M. Lluïsa Sagristá
- Departament de Bioquímica i Biología Molecular, Facultat de Biologia, Universitat de Barcelona, Avinguda Diagonal 645, 08028 Barcelona, Spain
| | - Santi Nonell
- Grup d'Enginyeria Molecular, Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain
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Interactions between selected photosensitizers and model membranes: an NMR classification. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1808:1661-72. [PMID: 21334303 DOI: 10.1016/j.bbamem.2011.02.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Revised: 01/21/2011] [Accepted: 02/11/2011] [Indexed: 01/22/2023]
Abstract
Membrane interactions of porphyrinic photosensitizers (PSs) are known to play a crucial role for PS efficiency in photodynamic therapy (PDT). In the current paper, the interactions between 15 different porphyrinic PSs with various hydrophilic/lipophilic properties and phospholipid bilayers were probed by NMR spectroscopy. Unilamellar vesicles consisting of dioleoyl-phosphatidyl-choline (DOPC) were used as membrane models. PS-membrane interactions were deduced from analysis of the main DOPC 1H-NMR resonances (choline and lipid chain signals). Initial membrane adsorption of the PSs was indicated by induced changes to the DOPC choline signal, i.e. a split into inner and outer choline peaks. Based on this parameter, the PSs could be classified into two groups, Type-A PSs causing a split and the Type-B PSs causing no split. A further classification into two subgroups each, A1, A2 and B1, B2 was based on the observed time-dependent changes of the main DOPC NMR signals following initial PS adsorption. Four different time-correlated patterns were found indicating different levels and rates of PS penetration into the hydrophobic membrane interior. The type of interaction was mainly affected by the amphiphilicity and the overall lipophilicity of the applied PS structures. In conclusion, the NMR data provided valuable structural and dynamic insights into the PS-membrane interactions which allow deriving the structural constraints for high membrane affinity and high membrane penetration of a given PS.
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29
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Silva NSD, Machado SM, Filho FCES, Pacheco-Soares C. Basic biological aspects of Tritrichomonas foetus of re-levance to the treatment of bovines suffering of tricho-moniasis. ACTA ACUST UNITED AC 2011. [DOI: 10.4236/ojas.2011.13015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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30
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Rahmanto AS, Morgan PE, Hawkins CL, Davies MJ. Cellular effects of photogenerated oxidants and long-lived, reactive, hydroperoxide photoproducts. Free Radic Biol Med 2010; 49:1505-15. [PMID: 20708682 DOI: 10.1016/j.freeradbiomed.2010.08.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Revised: 08/02/2010] [Accepted: 08/05/2010] [Indexed: 11/22/2022]
Abstract
Reaction of radicals and singlet oxygen ((1)O(2)) with proteins results in both direct damage and the formation of long-lived reactive hydroperoxides. Elevated levels of protein hydroperoxide-derived products have been detected in multiple human pathologies, suggesting that these secondary oxidants contribute to tissue damage. Previous studies have provided evidence for protein hydroperoxide-mediated inhibition of thiol-dependent enzymes and modulation of signaling processes in isolated systems. In this study (1)O(2) and hydroperoxides have been generated in J774A.1 macrophage-like cells using visible light and the photosensitizer rose bengal, with the consequences of oxidant formation examined both immediately and after subsequent (dark-phase) incubation. Significant losses of GSH (≤50%), total thiols (≤20%), and activity of thiol-dependent proteins (GAPDH, thioredoxin, protein tyrosine phosphatases, creatine kinase, and cathepsins B and L; 10-50% inhibition) were detected after 1 or 2 min photo-oxidation. Non-thiol-dependent enzymes were not affected. In contrast, NADPH levels increased, together with the activity of glutathione reductase, glutathione peroxidase, and thioredoxin reductase; these increases may be components of a rapid global cytoprotective cellular response to stress. Neither oxidized thioredoxin nor radical-mediated protein oxidation products were detected at significant levels. Further decreases in thiol levels and enzyme activity occurred during dark-phase incubation, with this accompanied by decreased cell viability. These secondary events are ascribed to the reactions of long-lived hydroperoxides, generated by (1)O(2)-mediated reactions. Overall, this study provides novel insights into early cellular responses to photo-oxidative damage and indicates that long-lived hydroperoxides can play a significant role in cellular damage.
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Rokitskaya TI, Macrae MX, Blake S, Egorova NS, Kotova EA, Yang J, Antonenko YN. Mechanistic insight into gramicidin-based detection of protein-ligand interactions via sensitized photoinactivation. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:454118. [PMID: 21339605 DOI: 10.1088/0953-8984/22/45/454118] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Among the many challenges for the development of ion channel-based sensors is the poor understanding of how to engineer modified transmembrane pores with tailored functionality that can respond to external stimuli. Here, we use the method of sensitized photoinactivation of gramicidin A (gA) channels in planar bilayer lipid membranes to help elucidate the underlying mechanistic details for changes in macroscopic transmembrane ionic current observed upon interaction of C-terminally attached gA ligands with specific proteins in solution. Three different systems were studied: (i) carbonic anhydrase (CA) and gA-sulfonamide, (ii) PSD-95 protein (belonging to the 'PDZ domain-containing protein') and a gA analog carrying the KGGHRRSARYLESSV peptide sequence at the C-terminus, and (iii) an anti-biotin antibody and gA-biotin. The results challenge a previously proposed mechanistic hypothesis suggesting that protein-induced current suppression is due to steric blockage of the ion passage through gA channels, while they reveal new insight for consideration in alternative mechanistic models. Additionally, we demonstrate that the length of a linker between the ligand and the gA channel may be less important for gramicidin-based detection of monovalent compared to multivalent protein-ligand interactions. These studies collectively shed new light on the mechanism of protein-induced current alterations in bilayer recordings of gA derivatives, which may be important in the design of new gramicidin-based sensors.
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Affiliation(s)
- Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119991, Russia
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Pashkovskaya A, Kotova E, Zorlu Y, Dumoulin F, Ahsen V, Agapov I, Antonenko Y. Light-triggered liposomal release: membrane permeabilization by photodynamic action. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:5726-5733. [PMID: 20000430 DOI: 10.1021/la903867a] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Photosensitized damage to liposome membranes was studied by using different dye-leakage assays based on fluorescence dequenching of a series of dyes upon their release from liposomes. Irradiation of liposomes with red light in the presence of a photosensitizer, trisulfonated aluminum phthalocyanine (AlPcS(3)), resulted in the pronounced leakage of carboxyfluorescein, but rather weak leakage of sulforhodamine B and almost negligible leakage of calcein from the corresponding dye-loaded liposomes. The same series of selectivity of liposome leakage was obtained with chlorin e6 that appeared to be more potent than AlPcS(3) in bringing about the photosensitized liposome leakage. Electrically neutral zinc phthalocyanine tetrasubstituted with a glycerol moiety (ZnPcGlyc(4)) was less effective than negatively charged AlPcS(3) in provoking the light-induced liposome permeabilization. On the contrary, both ZnPcGlyc(4) and AlPcS(3) were much more effective than chlorin e6 in sensitizing gramicidin channel inactivation in planar bilayer lipid membranes, thus showing that relative photodynamic efficacy of sensitizers can differ substantially for damaging different membrane targets. The photosensitized liposome permeabilization was apparently associated with oxidation of lipid double bonds by singlet oxygen as evidenced by the mandatory presence of unsaturated lipids in the membrane composition for the photosensitized liposome leakage to occur and the sensitivity of the latter to sodium azide. The fluorescence correlation spectroscopy measurements revealed marked permeability of photodynamically induced pores in liposome membranes for such photosensitizer as AlPcS(3).
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Affiliation(s)
- Alina Pashkovskaya
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Vorobyevy Gory 1, Moscow 119991, Russia
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Strakhovskaya MG, Antonenko YN, Pashkovskaya AA, Kotova EA, Kireev V, Zhukhovitsky VG, Kuznetsova NA, Yuzhakova OA, Negrimovsky VM, Rubin AB. Electrostatic binding of substituted metal phthalocyanines to enterobacterial cells: its role in photodynamic inactivation. BIOCHEMISTRY (MOSCOW) 2010; 74:1305-14. [PMID: 19961410 DOI: 10.1134/s0006297909120025] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effect of ionic substituents in zinc and aluminum phthalocyanine molecules and of membrane surface charge on the interaction of dyes with artificial membranes and enterobacterial cells, as well as on photosensitization efficiency was studied. It has been shown that increasing the number of positively charged substituents enhances the extent of phthalocyanine binding to Escherichia coli cells. This, along with the high quantum yield of singlet oxygen generation, determines efficient photodynamic inactivation of Gram-negative bacteria by zinc and aluminum octacationic phthalocyanines. The effect of Ca2+ and Mg2+ cations and pH on photodynamic inactivation of enterobacteria in the presence of octacationic zinc phthalocyanine has been studied. It has been shown that effects resulting in lowering negative charge on outer membrane protect bacteria against photoinactivation, which confirms the crucial role in this process of the electrostatic interaction of the photosensitizer with the cell wall. Electrostatic nature of binding is consistent with mainly electrostatic character of dye interactions with artificial membranes of different composition. Lower sensitivity of Proteus mirabilis to photodynamic inactivation, compared to that of E. coli and Salmonella enteritidis, due to low affinity of the cationic dye to the cells of this species, was found.
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Affiliation(s)
- M G Strakhovskaya
- Department of Biophysics, Faculty of Biology, Lomonosov Moscow State University, Moscow, 119991, Russia.
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Membrane transport of singlet oxygen monitored by dipole potential measurements. Biophys J 2010; 96:77-85. [PMID: 18931253 DOI: 10.1529/biophysj.108.135145] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2008] [Accepted: 09/03/2008] [Indexed: 11/18/2022] Open
Abstract
The efficiency of photodynamic reactions depends on 1), the penetration depth of the photosensitizer into the membrane and 2), the sidedness of the target. Molecules which are susceptible to singlet oxygen ((1)O(2)) experience less damage when separated from the photosensitizer by the membrane. Since (1)O(2) lifetime in the membrane environment is orders of magnitude longer than the time required for nonexcited oxygen (O(2)) to cross the membrane, this observation suggests that differences between the permeabilities or membrane partition of (1)O(2) and O(2) exist. We investigated this hypothesis by releasing (1)O(2) at one side of a planar membrane while monitoring the kinetics of target damage at the opposite side of the same membrane. Damage to the target, represented by dipole-modifying molecules (phloretin or phlorizin), was indicated by changes in the interleaflet dipole potential difference Deltaphi(b). A simple analytical model allowed estimation of the (1)O(2) interleaflet concentration difference from the rate at which Deltaphi(b) changed. It confirmed that the lower limit of (1)O(2) permeability is approximately 2 cm/s; i.e., it roughly matches O(2) permeability as predicted by Overton's rule. Consequently, the membrane cannot act as a barrier to (1)O(2) diffusion. Differences in the reaction rates at the cytoplasmic and extracellular membrane leaflets may be attributed only to (1)O(2) quenchers inside the membrane.
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Pashkovskaya AA, Perevoshchikova IV, Maizlish VE, Shaposhnikov GP, Kotova EA, Antonenko YN. Interaction of tetrasubstituted cationic aluminum phthalocyanine with artificial and natural membranes. BIOCHEMISTRY (MOSCOW) 2009; 74:1021-6. [DOI: 10.1134/s0006297909090107] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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36
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Zhientaev TM, Melik-Nubarov NS, Litmanovich EA, Aksenova NA, Glagolev NN, Solov’eva AB. The effect of Pluronics on the photocatalytic activity of water-soluble porphyrins. POLYMER SCIENCE SERIES A 2009. [DOI: 10.1134/s0965545x09050034] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Palewska K, Sujka M, Urasińska-Wójcik B, Sworakowski J, Lipiński J, Nešpůrek S, Rakušan J, Karásková M. Light-induced effects in sulfonated aluminum phthalocyanines — potential photosensitizers in the photodynamic therapy. J Photochem Photobiol A Chem 2008. [DOI: 10.1016/j.jphotochem.2007.11.025] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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38
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Protective Effects of Mitochondria-Targeted Antioxidant SkQ in Aqueous and Lipid Membrane Environments. J Membr Biol 2008; 222:141-9. [DOI: 10.1007/s00232-008-9108-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2008] [Accepted: 04/18/2008] [Indexed: 01/04/2023]
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Missner A, Horner A, Pohl P. Cholesterol's decoupling effect on membrane partitioning and permeability revisited: is there anything beyond Fick's law of diffusion? BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2008; 1778:2154-6. [PMID: 18510944 DOI: 10.1016/j.bbamem.2008.05.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 04/10/2008] [Accepted: 05/02/2008] [Indexed: 01/04/2023]
Abstract
In general, Fick's law of diffusion describes membrane permeation of hydrophobic or amphiphilic molecules. In contrast to this, Thomae et al. recently identified the volume ratio between barrier and aqueous compartments as important additional determinants of membrane permeability (Pm) [A.V. Thomae, T. Koch, C. Panse, H. Wunderli-Allenspach, and S.D. Kramer, Comparing the lipid membrane affinity and permeation of drug-like acids: the intriguing effects of cholesterol and charged lipids, Pharm. Res. 24 (2007) 1457-1472.]. This new theory was supported by the striking observation that low concentrations of cholesterol increased Pm of salicylic acid. As Fick's law is of fundamental importance to all membrane transport processes, we reinvestigated this phenomenon. We measured the electrophoretic mobility of vesicles and used electrochemical scanning microscopy to study the adsorption of the SA anion to lipid vesicular bilayers and SA transport through planar lipid bilayers, respectively. As predicted by Fick's law, Pm of SA decreased continuously with increasing cholesterol content. Thomae et al. made the contrasting artifactual observation because their kinetic approach lacked the required time resolution and led to an underestimation of Pm by five orders of magnitude. We conclude that there is nothing beyond Fick's law of diffusion. It is still valid.
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Affiliation(s)
- Andreas Missner
- Institut für Biophysik, Johannes Kepler Universität, Linz, Austria
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Pashkovskaya A, Maizlish V, Shaposhnikov G, Kotova E, Antonenko Y. Role of electrostatics in the binding of charged metallophthalocyanines to neutral and charged phospholipid membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2008; 1778:541-8. [DOI: 10.1016/j.bbamem.2007.10.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2007] [Revised: 10/04/2007] [Accepted: 10/29/2007] [Indexed: 11/27/2022]
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Pashkovskaya AA, Sokolenko EA, Sokolov VS, Kotova EA, Antonenko YN. Photodynamic activity and binding of sulfonated metallophthalocyanines to phospholipid membranes: Contribution of metal-phosphate coordination. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2007; 1768:2459-65. [PMID: 17662238 DOI: 10.1016/j.bbamem.2007.05.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2007] [Revised: 05/08/2007] [Accepted: 05/18/2007] [Indexed: 10/23/2022]
Abstract
Photosensitized efficacy of tetrasulfonated phthalocyanines of zinc, aluminum and nickel (ZnPcS(4), AlPcS(4) and NiPcS(4), respectively) as studied by gramicidin channel (gA) photoinactivation was compared with adsorption of the dyes on the surface of a bilayer lipid membrane as measured by the inner field compensation method. The adsorption of the negatively charged phthalocyanines on diphytanoylphosphatidylcholine (DPhPC) membranes led to formation of a negative boundary potential difference between the membrane/water interfaces. Good correlation was shown between the photodynamic activity and the membrane binding of the three metallophthalocyanines. ZnPcS(4) appeared to be the most potent of these photosensitizers, while NiPcS(4) was completely ineffective. All of these phthalocyanines displayed no binding and negligible gA photoinactivation with membranes formed of glycerol monooleate (GMO), whereas Rose Bengal exhibited significant binding and photodynamic efficacy with GMO membranes. Gramicidin photoinactivation in the presence of AlPcS(4), being insensitive to the ionic strength of the bathing solution, was inhibited by fluoride and attenuated by phosphate ions. A blue shift of the fluorescence peak position of ZnPcS(4) dissolved in ethanol was elicited by phosphate, similarly to fluoride, which was indicative of the coordination interaction of these ions with the central metal atom of the phthalocyanine macrocycle. This interaction was enhanced in the medium modeling the water-membrane interface. The results obtained imply that binding of tetrasulfonated metallophthalocyanines to phospholipid membranes is determined primarily by metal-phosphate coordination.
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Affiliation(s)
- Alina A Pashkovskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119992, Russia
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Prasmickaite L, Høgset A, Berg K. Evaluation of Different Photosensitizers for Use in Photochemical Gene Transfection¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2001)0730388eodpfu2.0.co2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Shapovalov VL, Rokitskaya TI, Kotova EA, Krokhin OV, Antonenko YN. Effect of Fluoride Anions on Gramicidin Photoinactivation Sensitized by Sulfonated Aluminum Phthalocyanines¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2001)0740001eofaog2.0.co2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Dutseva EA, Antonenko YN, Kotova EA, Pfeifer JR, Koert U. Sensitized photoinactivation of minigramicidin channels in bilayer lipid membranes. BIOCHIMICA ET BIOPHYSICA ACTA 2007; 1768:1230-7. [PMID: 17306219 DOI: 10.1016/j.bbamem.2007.01.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2006] [Revised: 12/26/2006] [Accepted: 01/10/2007] [Indexed: 11/15/2022]
Abstract
The method of sensitized photoinactivation based on the photosensitized damage of gramicidin A (gA) molecules was applied here to study ionic channels formed by minigramicidin (the 11-residue analogue of gramicidin A) in a planar bilayer lipid membrane (BLM) of different thickness. Irradiation of BLM with a single flash of visible light in the presence of a photosensitizer (aluminum phthalocyanine or Rose Bengal) generating singlet oxygen provoked a decrease in the minigramicidin-induced electric current across BLM, the kinetics of which had the characteristic time of several seconds, as observed with gA. For gA, there is good correlation between the characteristic time of photoinactivation and the single-channel lifetime. In contrast to the covalent dimer of gA characterized by extremely long single-channel lifetime and the absence of current relaxation upon flash excitation, the covalent head-to-head dimer of minigramicidin displayed the flash-induced current decrease with the kinetics being strongly dependent on the membrane thickness. The current decrease became slower both upon increasing the concentration of the minigramicidin covalent dimer and upon including cholesterol in the membrane composition. These data in combination with the quadratic dependence of the current on the peptide concentration can be rationalized by hypothesizing that the macroscopic current across BLM measured at high concentrations of the peptide is provided by dimers of minigramicidin covalent dimers in the double beta(5.7)-helical conformation having the lifetime of about 0.4 s, while single channels with the lifetime of 0.01 s, observed at a very low peptide concentration, correspond to the single-stranded beta(6.3)-helical conformation. Alternatively the results can be explained by clustering of channels at high concentrations of the minigramicidin covalent dimer.
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Affiliation(s)
- Elena A Dutseva
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119992, Russia
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45
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Chernyak BV, Izyumov DS, Lyamzaev KG, Pashkovskaya AA, Pletjushkina OY, Antonenko YN, Sakharov DV, Wirtz KWA, Skulachev VP. Production of reactive oxygen species in mitochondria of HeLa cells under oxidative stress. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2006; 1757:525-34. [PMID: 16678116 DOI: 10.1016/j.bbabio.2006.02.019] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/11/2006] [Revised: 02/13/2006] [Accepted: 02/23/2006] [Indexed: 10/24/2022]
Abstract
Mitochondria can be a source of reactive oxygen species (ROS) and a target of oxidative damage during oxidative stress. In this connection, the effect of photodynamic treatment (PDT) with Mitotracker Red (MR) as a mitochondria-targeted photosensitizer has been studied in HeLa cells. It is shown that MR produces both singlet oxygen and superoxide anion upon photoactivation and causes photoinactivation of gramicidin channels in a model system (planar lipid bilayer). Mitochondria-targeted antioxidant (MitoQ) inhibits this effect. In living cells, MR-mediated PDT initiates a delayed ("dark") accumulation of ROS, which is accelerated by inhibitors of the respiratory chain (piericidin, rotenone and myxothiazol) and inhibited by MitoQ and diphenyleneiodonium (an inhibitor of flavin enzymes), indicating that flavin of Complex I is involved in the ROS production. PDT causes necrosis that is prevented by MitoQ. Treatment of the cell with hydrogen peroxide causes accumulation of ROS, and the effects of inhibitors and MitoQ are similar to that described for the PDT model. Apoptosis caused by H2O2 is augmented by the inhibitors of respiration and suppressed by MitoQ. It is concluded that the initial segments of the respiratory chain can be an important source of ROS, which are targeted to mitochondria, determining the fate of the cell subjected to oxidative stress.
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Affiliation(s)
- Boris V Chernyak
- A. N. Belozersky Institute, Moscow State University, 119992 Moscow, Russia.
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Stark G. Functional consequences of oxidative membrane damage. J Membr Biol 2005; 205:1-16. [PMID: 16245038 DOI: 10.1007/s00232-005-0753-8] [Citation(s) in RCA: 231] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2005] [Revised: 07/19/2005] [Indexed: 12/12/2022]
Abstract
The interaction of reactive oxygen species with biological membranes is known to produce a great variety of different functional modifications. Part of these modifications may be classified as direct effects. They are due to direct interaction of the reactive species with the molecular machinery under study with a subsequent chemical and functional modification of these molecules. An important part of the observed functional modifications are, however, indirect effects. They are the consequence of an oxidative modification of the environment of biological macromolecules. Lipid peroxidation-via its generation of chemically reactive products-contributes to the loss of cellular functions through the inactivation of membrane enzymes and even of cytoplasmic (i.e., water soluble) proteins. Oxidation of membrane lipids may, however, also increase the efficiency of membrane functions. This was observed for a series of transport systems. Lipid peroxidation was accompanied by activation of certain types of ion channels and ion carriers. The effect is due to an increase of the polarity of the membrane interior by accumulation of polar oxidation products. The concomitant change of the dielectric constant, which may be detected via the increase of the membrane capacitance, facilitates the opening of membrane channels and lowers the inner membrane barrier for the movement of ions across the membrane. The predominant effect, however, at least at a greater extent of lipid peroxidation, is the inhibition of membrane functions. The strong increase of the leak conductance contributes to the depolarization of the membrane potential, it destroys the barrier properties of the membrane and it may finally lead, via an increase of cytoplasmic Ca(2+) concentration, to cell death. The conclusions were derived from experiments performed with different systems: model systems in planar lipid membranes, native ion channels either reconstituted in lipid membranes or investigated in their natural environment by the patch-clamp method, and two important ion pumps, the Na/K-ATPase and the sarcoplasmic reticulum (SR) Ca-ATPase.
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Affiliation(s)
- G Stark
- Department of Biology, University of Konstanz, Box M638, D-78457 Konstanz, Germany.
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Geißler D, Antonenko YN, Schmidt R, Keller S, Krylova OO, Wiesner B, Bendig J, Pohl P, Hagen V. (Cumarin-4-yl)methylester als hocheffiziente und ultraschnelle Phototrigger für Protonen und ihre Anwendung zur Oberflächenansäuerung von Membranen. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200461567] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Geissler D, Antonenko YN, Schmidt R, Keller S, Krylova OO, Wiesner B, Bendig J, Pohl P, Hagen V. (Coumarin-4-yl)methyl Esters as Highly Efficient, Ultrafast Phototriggers for Protons and Their Application to Acidifying Membrane Surfaces. Angew Chem Int Ed Engl 2005; 44:1195-8. [PMID: 15696594 DOI: 10.1002/anie.200461567] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Daniel Geissler
- Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Strasse 10, 13125 Berlin, Germany
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Sensitized Photoinactivation of Gramicidin Channels: Technique and Applications. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s1554-4516(05)01005-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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50
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Sobko AA, Vigasina MA, Rokitskaya TI, Kotova EA, Zakharov SD, Cramer WA, Antonenko YN. Chemical and Photochemical Modification of Colicin E1 and Gramicidin A in Bilayer Lipid Membranes. J Membr Biol 2004; 199:51-62. [PMID: 15366423 DOI: 10.1007/s00232-004-0674-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Chemical modification and photodynamic treatment of the colicin E1 channel-forming domain (P178) in vesicular and planar bilayer lipid membranes (BLMs) was used to elucidate the role of tryptophan residues in colicin E1 channel activity. Modification of colicin tryptophan residues by N-bromosuccinimide (NBS), as judged by the loss of tryptophan fluorescence, resulted in complete suppression of wild-type P178 channel activity in BLMs formed from fully saturated (diphytanoyl) phospholipids, both at the macroscopic-current and single-channel levels. The similar effect on both the tryptophan fluorescence and the electric current across BLM was observed also after NBS treatment of gramicidin channels. Of the single-tryptophan P178 mutants studied, W460 showed the highest sensitivity to NBS treatment, pointing to the importance of the water-exposed Trp460 in colicin channel activity. In line with previous work, the photodynamic treatment (illumination with visible light in the presence of a photosensitizer) led to suppression of P178 channel activity in diphytanoyl-phospholipid membranes concomitant with the damage to tryptophan residues detected here by a decrease in tryptophan fluorescence. The present work revealed novel effects: activation of P178 channels as a result of both NBS and photodynamic treatments was observed with BLMs formed from unsaturated (dioleoyl) phospholipids. These phenomena are ascribed to the effect of oxidative modification of double-bond-containing lipids on P178 channel formation. The pronounced stimulation of the colicin-mediated ionic current observed after both pretreatment with NBS and sensitized photomodification of the BLMs support the idea that distortion of membrane structure can facilitate channel formation.
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Affiliation(s)
- A A Sobko
- A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119992, Russia
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