1
|
Bregnhøj M, Thorning F, Ogilby PR. Singlet Oxygen Photophysics: From Liquid Solvents to Mammalian Cells. Chem Rev 2024. [PMID: 39106038 DOI: 10.1021/acs.chemrev.4c00105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
Molecular oxygen, O2, has long provided a cornerstone for studies in chemistry, physics, and biology. Although the triplet ground state, O2(X3Σg-), has garnered much attention, the lowest excited electronic state, O2(a1Δg), commonly called singlet oxygen, has attracted appreciable interest, principally because of its unique chemical reactivity in systems ranging from the Earth's atmosphere to biological cells. Because O2(a1Δg) can be produced and deactivated in processes that involve light, the photophysics of O2(a1Δg) are equally important. Moreover, pathways for O2(a1Δg) deactivation that regenerate O2(X3Σg-), which address fundamental principles unto themselves, kinetically compete with the chemical reactions of O2(a1Δg) and, thus, have practical significance. Due to technological advances (e.g., lasers, optical detectors, microscopes), data acquired in the past ∼20 years have increased our understanding of O2(a1Δg) photophysics appreciably and facilitated both spatial and temporal control over the behavior of O2(a1Δg). One goal of this Review is to summarize recent developments that have broad ramifications, focusing on systems in which oxygen forms a contact complex with an organic molecule M (e.g., a liquid solvent). An important concept is the role played by the M+•O2-• charge-transfer state in both the formation and deactivation of O2(a1Δg).
Collapse
Affiliation(s)
- Mikkel Bregnhøj
- Department of Chemistry, Aarhus University, 140 Langelandsgade, Aarhus 8000, Denmark
| | - Frederik Thorning
- Department of Chemistry, Aarhus University, 140 Langelandsgade, Aarhus 8000, Denmark
| | - Peter R Ogilby
- Department of Chemistry, Aarhus University, 140 Langelandsgade, Aarhus 8000, Denmark
| |
Collapse
|
2
|
González-Santiago B, Vicente-Escobar JO, de la Luz-Tlapaya V, García-Gutiérrez P, García-Sánchez MÁ. Porphyrins Embedded in Translucent Polymeric Substrates: Fluorescence Preservation and Molecular Docking Studies. J Fluoresc 2024; 34:1707-1718. [PMID: 37597136 DOI: 10.1007/s10895-023-03396-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 08/10/2023] [Indexed: 08/21/2023]
Abstract
This research describes the functionalization of polymer-matrix-trapping porphyrins, considering that the transcendental properties of meso-substituted porphyrins, such as optical and chemical stability, combined with the strength of the polymers, can produce photoactive advanced polymeric networks. Polystyrene (PS) and O,O´-bis-(2-aminopropyl)-polyethyleneglycol-300 (2NH2peg300, APEG), or their combination, were used to confine the meso-substituted porphyrin species 5,10,15,20-tetrakis(4'-carboxy-1,1'-biphenyl-4-yl)porphyrin and 5,10,15,20-tetrakis((pyridin-4-yl)phenyl)porphyrin. The samples were characterized by Fourier-transform infrared (FTIR), X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) and fluorescence spectroscopies. The absorption and emission properties of the materials were compared to those of their respective porphyrin solutions. The fluorescence was preserved in the obtained composite through a mixture of polymers, PS, and APEG, yielding translucent polymeric networks. Moreover, analysis of individual polymeric assemblies by molecular docking was performed to support the understanding of the experimental findings. This analysis corroborates that the stronger the estimated binding energies, the stronger the interactions that occur between porphyrin and the polymer via non-polar covalent bonds.
Collapse
Affiliation(s)
- Berenice González-Santiago
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-Unidad Legaria, Calzada Legaria 694, Alcaldía Miguel Hidalgo, Ciudad de México, 11500, México
| | - Jonathan Osiris Vicente-Escobar
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col.Vicentina, Ciudad de México, 09340, México
| | - Verónica de la Luz-Tlapaya
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col.Vicentina, Ciudad de México, 09340, México
| | - Ponciano García-Gutiérrez
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col.Vicentina, Ciudad de México, 09340, México
| | - Miguel Ángel García-Sánchez
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col.Vicentina, Ciudad de México, 09340, México.
| |
Collapse
|
3
|
Giri RP, Chowdhury S, Mukhopadhyay MK, Chakrabarti A, Sanyal MK. Ganglioside GM1 Drives Hemin and Protoporphyrin Adsorption in Phospholipid Membranes: A Structural Study. J Phys Chem B 2024; 128:2745-2754. [PMID: 38447189 DOI: 10.1021/acs.jpcb.3c08239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Monosialoganglioside (GM1), a ubiquitous component of lipid rafts, and hemin, an integral part of heme proteins such as hemoglobin, are essential to the cell membranes of brain neurons and erythrocyte red blood cells for regulating cellular communication and oxygen transport. Protoporphyrin IX (PPIX) and its derivative hemin, on the contrary, show significant cytotoxic effects when in excess causing hematological diseases, such as thalassemia, anemia, malaria, and neurodegeneration. However, the in-depth molecular etiology of their interactions with the cell membrane has so far been poorly understood. Herein, the structure of the polymer cushion-supported lipid bilayer (SLB) of the binary mixture of phospholipid and GM1 in the presence of PPIX and its derivative hemin has been investigated to predict the molecular interactions in model phospholipid membranes. A high-resolution synchrotron-based X-ray scattering technique has been employed to explore the out-of-plane structure of the assembly at different compositions and concentrations. The structural changes have been complemented with the isobaric changes in the mean molecular area obtained from the Langmuir monolayer isotherm to predict the additive-induced membrane condensation and fluidization. PPIX-induced fluidization of phospholipid SLB without GM1 was witnessed, which was reversed to condensation with 2-fold higher structural changes in the presence of GM1. A hemin concentration-dependent linear condensing effect was observed in the pristine SLB. The effect was significantly reduced, and the linearity was observed to be lost in the mixed SLB containing GM1. Our study shows that GM1 alters the interaction of hemin and PPIX with the membrane, which could be explained with the aid of hydrophobic and electrostatic interactions. Our study indicates favorable and unfavorable interactions of GM1 with PPIX and hemin, respectively, in the membrane. The observed structural changes in both SLB and the underlying polymer cushion layer lead to the proposal of a molecule-specific interaction model that can benefit the pharmaceutical industries specialized for drug designing. Our study potentially enriches our fundamental biophysical understanding of neurodegenerative diseases and drug-membrane interactions.
Collapse
Affiliation(s)
- Rajendra P Giri
- Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, Kolkata, West Bengal 700064, India
- Department of Physics, Indian Institute of Technology (ISM), Dhanbad, Jharkhand 826004, India
| | - Subhadip Chowdhury
- Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, Kolkata, West Bengal 700064, India
| | - Mrinmay K Mukhopadhyay
- Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, Kolkata, West Bengal 700064, India
| | - Abhijit Chakrabarti
- Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, Kolkata, West Bengal 700064, India
- School of Biological Sciences, Ramakrishna Mission Vivekananda Educational & Research Institute, Narendrapur, Kolkata 700103, India
| | - Milan K Sanyal
- Saha Institute of Nuclear Physics, A CI of Homi Bhabha National Institute, Kolkata, West Bengal 700064, India
| |
Collapse
|
4
|
Holoubek J, Salát J, Kotouček J, Kastl T, Vancová M, Huvarová I, Bednář P, Bednářová K, Růžek D, Renčiuk D, Eyer L. Antiviral activity of porphyrins and porphyrin-like compounds against tick-borne encephalitis virus: Blockage of the viral entry/fusion machinery by photosensitization-mediated destruction of the viral envelope. Antiviral Res 2024; 221:105767. [PMID: 38040199 DOI: 10.1016/j.antiviral.2023.105767] [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] [Received: 09/02/2023] [Revised: 11/14/2023] [Accepted: 11/26/2023] [Indexed: 12/03/2023]
Abstract
Tick-borne encephalitis virus (TBEV), the causative agent of tick-borne encephalitis (TBE), is a medically important flavivirus endemic to the European-Asian continent. Although more than 12,000 clinical cases are reported annually worldwide, there is no anti-TBEV therapy available to treat patients with TBE. Porphyrins are macrocyclic molecules consisting of a planar tetrapyrrolic ring that can coordinate a metal cation. In this study, we investigated the cytotoxicity and anti-TBEV activity of a large series of alkyl- or (het)aryl-substituted porphyrins, metalloporphyrins, and chlorins and characterized their molecular interactions with the viral envelope in detail. Our structure-activity relationship study showed that the tetrapyrrole ring is an essential structural element for anti-TBEV activity, but that the presence of different structurally distinct side chains with different lengths, charges, and rigidity or metal cation coordination can significantly alter the antiviral potency of porphyrin scaffolds. Porphyrins were demonstrated to interact with the TBEV lipid membrane and envelope protein E, disrupt the TBEV envelope and inhibit the TBEV entry/fusion machinery. The crucial mechanism of the anti-TBEV activity of porphyrins is based on photosensitization and the formation of highly reactive singlet oxygen. In addition to blocking viral entry and fusion, porphyrins were also observed to interact with RNA oligonucleotides derived from TBEV genomic RNA, indicating that these compounds could target multiple viral/cellular structures. Furthermore, immunization of mice with porphyrin-inactivated TBEV resulted in the formation of TBEV-neutralizing antibodies and protected the mice from TBEV infection. Porphyrins can thus be used to inactivate TBEV while retaining the immunogenic properties of the virus and could be useful for producing new inactivated TBEV vaccines.
Collapse
Affiliation(s)
- Jiří Holoubek
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, CZ-62100, Brno, Czech Republic; Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, CZ-37005, Ceske Budejovice, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, CZ-62500, Brno, Czech Republic
| | - Jiří Salát
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, CZ-62100, Brno, Czech Republic; Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, CZ-37005, Ceske Budejovice, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, CZ-62500, Brno, Czech Republic
| | - Jan Kotouček
- Department of Pharmacology and Toxicology, Veterinary Research Institute, CZ-62100, Brno, Czech Republic
| | - Tomáš Kastl
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, CZ-62100, Brno, Czech Republic
| | - Marie Vancová
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, CZ-37005, Ceske Budejovice, Czech Republic; Faculty of Science, University of South Bohemia, CZ-37005, Ceske Budejovice, Czech Republic
| | - Ivana Huvarová
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, CZ-62100, Brno, Czech Republic
| | - Petr Bednář
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, CZ-62100, Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, CZ-62500, Brno, Czech Republic; Faculty of Science, University of South Bohemia, CZ-37005, Ceske Budejovice, Czech Republic
| | - Klára Bednářová
- Department of Biophysics of Nucleic Acids, Institute of Biophysics of the Czech Academy of Sciences, CZ-61200, Brno, Czech Republic
| | - Daniel Růžek
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, CZ-62100, Brno, Czech Republic; Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, CZ-37005, Ceske Budejovice, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, CZ-62500, Brno, Czech Republic
| | - Daniel Renčiuk
- Department of Biophysics of Nucleic Acids, Institute of Biophysics of the Czech Academy of Sciences, CZ-61200, Brno, Czech Republic
| | - Luděk Eyer
- Laboratory of Emerging Viral Diseases, Veterinary Research Institute, CZ-62100, Brno, Czech Republic; Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, CZ-37005, Ceske Budejovice, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, CZ-62500, Brno, Czech Republic.
| |
Collapse
|
5
|
Doloczki S, Kern C, Holmberg KO, Swartling FJ, Streuff J, Dyrager C. Photoinduced Ring-Opening and Phototoxicity of an Indolin-3-one Derivative. Chemistry 2023; 29:e202300864. [PMID: 37332083 DOI: 10.1002/chem.202300864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/20/2023]
Abstract
The study of a fluorescent indolin-3-one derivative is reported that, as opposed to its previously described congeners, selectively undergoes photoactivated ring-opening in apolar solvents. The excited state involved in this photoisomerization was partially deactivated by the formation of singlet oxygen. Cell studies revealed lipid droplet accumulation and efficient light-induced cytotoxicity.
Collapse
Affiliation(s)
- Susanne Doloczki
- Department of Chemistry - BMC, Uppsala University, Box 576, 75123, Uppsala, Sweden
| | - Christoph Kern
- Department of Chemistry - BMC, Uppsala University, Box 576, 75123, Uppsala, Sweden
| | - Karl O Holmberg
- Department of Immunology, Genetics and Pathology, Uppsala University, Rudbeck Laboratory, 75185, Uppsala, Sweden
| | - Fredrik J Swartling
- Department of Immunology, Genetics and Pathology, Uppsala University, Rudbeck Laboratory, 75185, Uppsala, Sweden
| | - Jan Streuff
- Department of Chemistry - BMC, Uppsala University, Box 576, 75123, Uppsala, Sweden
| | - Christine Dyrager
- Department of Chemistry - BMC, Uppsala University, Box 576, 75123, Uppsala, Sweden
| |
Collapse
|
6
|
Espitia-Almeida F, Valle-Molinares R, Navarro Quiroz E, Pacheco-Londoño LC, Galán-Freyle NJ. Photodynamic Antimicrobial Activity of a Novel 5,10,15,20-Tetrakis (4-Ethylphenyl) Porphyrin against Clinically Important Bacteria. Pharmaceuticals (Basel) 2023; 16:1059. [PMID: 37630978 PMCID: PMC10459089 DOI: 10.3390/ph16081059] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 07/10/2023] [Accepted: 07/20/2023] [Indexed: 08/27/2023] Open
Abstract
The growing emergence of microbes resistant to commercially available antibiotic therapies poses a threat to healthcare systems worldwide. Multiple factors have been associated with the increasing incidence of hospital-acquired infections caused by antibiotic-resistant pathogens, including the indiscriminate use of broad-spectrum antibiotics, the massive application of antibiotics in hospitals as a prophylactic measure, self-medication, and nonadherence to pharmacological therapies by patients. In this study, we developed a novel treatment to mitigate the impact of microbial resistance. We synthesized a benzoporphyrin derivative, 5,10,15,20-tetrakis (4-ethylphenyl) porphyrin (TEtPP), with a reaction yield close to 50%. TEtPP exhibited excellent photophysical properties (Φf = 0.12 ± 0.04 and ΦΔ = 0.81 ± 0.23) and was thereby assessed as a potential agent for antibacterial photodynamic therapy. The photophysical properties of the synthesized porphyrin derivative were correlated with the assayed antimicrobial activity. TEtPP showed higher activity against the MRSA strain under irradiation than in the absence of irradiation (minimum inhibitory concentration (MIC) = 69.42 µg/mL vs. MIC = 109.30 µg/mL, p < 0.0001). Similar behavior was observed against P. aeruginosa (irradiated MIC = 54.71 µg/mL vs. nonirradiated MIC = 402.90 µg/mL, p < 0.0001). TEtPP exhibited high activity against S. aureus in both the irradiated and nonirradiated assays (MIC = 67.68 µg/mL vs. MIC = 58.26 µg/mL, p = 0.87).
Collapse
Affiliation(s)
- Fabián Espitia-Almeida
- Life Science Research Center, Universidad Simón Bolívar, Barranquilla 080002, Colombia (N.J.G.-F.)
- Faculty of Basic and Biomedical Sciences, Universidad Simón Bolívar, Barranquilla 080002, Colombia
- Faculty of Basic Sciences, Biology Program, Universidad del Atlántico, Puerto Colombia 081001, Colombia
| | - Roger Valle-Molinares
- Faculty of Basic Sciences, Biology Program, Universidad del Atlántico, Puerto Colombia 081001, Colombia
| | - Elkin Navarro Quiroz
- Life Science Research Center, Universidad Simón Bolívar, Barranquilla 080002, Colombia (N.J.G.-F.)
| | | | - Nataly J. Galán-Freyle
- Life Science Research Center, Universidad Simón Bolívar, Barranquilla 080002, Colombia (N.J.G.-F.)
| |
Collapse
|
7
|
External Hemin as an Inhibitor of Mitochondrial Large-Conductance Calcium-Activated Potassium Channel Activity. Int J Mol Sci 2022; 23:ijms232113391. [DOI: 10.3390/ijms232113391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/26/2022] [Accepted: 11/01/2022] [Indexed: 11/06/2022] Open
Abstract
The mitochondrial large-conductance calcium-activated potassium channel (mitoBKCa) is located in the inner mitochondrial membrane and seems to play a crucial role in cytoprotection. The mitoBKCa channel is regulated by many modulators, including activators, such as calcium ions and inhibitors, such as heme and its oxidized form hemin. Heme/hemin binds to the heme-binding motif (CXXCH) located between two RCK domains present in the mitochondrial matrix. In the present study, we used the patch-clamp technique in the outside-out configuration to record the activity of mitoBKCa channels. This allowed for the application of channel modulators to the intermembrane-space side of the mitoBKCa. We found that hemin applied in this configuration inhibits the activity of mitoBKCa. In addition, we proved that the observed hemin effect is specific and it is not due to its interaction with the inner mitochondrial membrane. Our data suggest the existence of a new potential heme/hemin binding site in the structure of the mitoBKCa channel located on the mitochondrial intermembrane space side, which could constitute a new way for the regulation of mitoBKCa channel activity.
Collapse
|
8
|
A model to understand type I oxidations of biomolecules photosensitized by pterins. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY 2021. [DOI: 10.1016/j.jpap.2021.100045] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
|
9
|
Gjuroski I, Furrer J, Vermathen M. Probing the Interactions of Porphyrins with Macromolecules Using NMR Spectroscopy Techniques. Molecules 2021; 26:1942. [PMID: 33808335 PMCID: PMC8037866 DOI: 10.3390/molecules26071942] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/22/2021] [Accepted: 03/24/2021] [Indexed: 12/11/2022] Open
Abstract
Porphyrinic compounds are widespread in nature and play key roles in biological processes such as oxygen transport in blood, enzymatic redox reactions or photosynthesis. In addition, both naturally derived as well as synthetic porphyrinic compounds are extensively explored for biomedical and technical applications such as photodynamic therapy (PDT) or photovoltaic systems, respectively. Their unique electronic structures and photophysical properties make this class of compounds so interesting for the multiple functions encountered. It is therefore not surprising that optical methods are typically the prevalent analytical tool applied in characterization and processes involving porphyrinic compounds. However, a wealth of complementary information can be obtained from NMR spectroscopic techniques. Based on the advantage of providing structural and dynamic information with atomic resolution simultaneously, NMR spectroscopy is a powerful method for studying molecular interactions between porphyrinic compounds and macromolecules. Such interactions are of special interest in medical applications of porphyrinic photosensitizers that are mostly combined with macromolecular carrier systems. The macromolecular surrounding typically stabilizes the encapsulated drug and may also modify its physical properties. Moreover, the interaction with macromolecular physiological components needs to be explored to understand and control mechanisms of action and therapeutic efficacy. This review focuses on such non-covalent interactions of porphyrinic drugs with synthetic polymers as well as with biomolecules such as phospholipids or proteins. A brief introduction into various NMR spectroscopic techniques is given including chemical shift perturbation methods, NOE enhancement spectroscopy, relaxation time measurements and diffusion-ordered spectroscopy. How these NMR tools are used to address porphyrin-macromolecule interactions with respect to their function in biomedical applications is the central point of the current review.
Collapse
Affiliation(s)
| | | | - Martina Vermathen
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland; (I.G.); (J.F.)
| |
Collapse
|
10
|
Soe TH, Watanabe K, Ohtsuki T. Photoinduced Endosomal Escape Mechanism: A View from Photochemical Internalization Mediated by CPP-Photosensitizer Conjugates. Molecules 2020; 26:E36. [PMID: 33374732 PMCID: PMC7793540 DOI: 10.3390/molecules26010036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/19/2020] [Accepted: 12/21/2020] [Indexed: 11/16/2022] Open
Abstract
Endosomal escape in cell-penetrating peptide (CPP)-based drug/macromolecule delivery systems is frequently insufficient. The CPP-fused molecules tend to remain trapped inside endosomes and end up being degraded rather than delivered into the cytosol. One of the methods for endosomal escape of CPP-fused molecules is photochemical internalization (PCI), which is based on the use of light and a photosensitizer and relies on photoinduced endosomal membrane destabilization to release the cargo molecule. Currently, it remains unclear how this delivery strategy behaves after photostimulation. Recent findings, including our studies using CPP-cargo-photosensitizer conjugates, have shed light on the photoinduced endosomal escape mechanism. In this review, we discuss the structural design of CPP-photosensitizer and CPP-cargo-photosensitizer conjugates, and the PCI mechanism underlying their application.
Collapse
Affiliation(s)
- Tet Htut Soe
- Department of Biotechnology, Mandalay Technological University, Patheingyi, Mandalay 05072, Myanmar;
| | - Kazunori Watanabe
- Department of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan;
| | - Takashi Ohtsuki
- Department of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan;
| |
Collapse
|
11
|
Tsubone TM, Martins WK, Franco MSF, Silva MN, Itri R, Baptista MS. Cellular compartments challenged by membrane photo-oxidation. Arch Biochem Biophys 2020; 697:108665. [PMID: 33159891 DOI: 10.1016/j.abb.2020.108665] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/20/2020] [Accepted: 10/31/2020] [Indexed: 12/18/2022]
Abstract
The lipid composition impacts directly on the structure and function of the cytoplasmic as well as organelle membranes. Depending on the type of membrane, specific lipids are required to accommodate, intercalate, or pack membrane proteins to the proper functioning of the cells/organelles. Rather than being only a physical barrier that separates the inner from the outer spaces, membranes are responsible for many biochemical events such as cell-to-cell communication, protein-lipid interaction, intracellular signaling, and energy storage. Photochemical reactions occur naturally in many biological membranes and are responsible for diverse processes such as photosynthesis and vision/phototaxis. However, excessive exposure to light in the presence of absorbing molecules produces excited states and other oxidant species that may cause cell aging/death, mutations and innumerable diseases including cancer. At the same time, targeting key compartments of diseased cells with light can be a promising strategy to treat many diseases in a clinical procedure called Photodynamic Therapy. Here we analyze the relationships between membrane alterations induced by photo-oxidation and the biochemical responses in mammalian cells. We specifically address the impact of photosensitization reactions in membranes of different organelles such as mitochondria, lysosome, endoplasmic reticulum, and plasma membrane, and the subsequent responses of eukaryotic cells.
Collapse
Affiliation(s)
| | | | - Marcia S F Franco
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil
| | | | - Rosangela Itri
- Department of Applied Physics, Institute of Physics, University of São Paulo, SP, Brazil
| | - Mauricio S Baptista
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, SP, Brazil.
| |
Collapse
|
12
|
In Vitro Anti-Leishmanial Effect of Metallic Meso-Substituted Porphyrin Derivatives against Leishmania braziliensis and Leishmania panamensis Promastigotes Properties. Molecules 2020; 25:molecules25081887. [PMID: 32325815 PMCID: PMC7221524 DOI: 10.3390/molecules25081887] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 04/11/2020] [Accepted: 04/17/2020] [Indexed: 12/16/2022] Open
Abstract
In this study, a family of porphyrins based on 5,10,15,20-Tetrakis(4-ethylphenyl)porphyrin (1, Ph) and six metallo-derivatives (Zn2+(2, Ph-Zn), Sn4+(3, Ph-Sn), Mn2+ (4, Ph-Mn), Ni2+ (5, Ph-Ni), Al3+ (6, Ph-Al), and V3+ (7, Ph-V)) were tested as photosensitizers for photodynamic therapy against Leishmania braziliensis and panamensis. The singlet oxygen quantum yield value (ΦΔ) for (1–7) was measured using 1,3-diphenylisobenzofuran (DPBF) as a singlet oxygen trapping agent and 5,10,15,20-(tetraphenyl)-porphyrin (H2TPP) as a reference standard; besides, parasite viability was estimated by the MTT assay. After metal insertion into the porphyrin core, the ΦΔ increased from 0.76–0.90 and cell viability changed considerably. The ΦΔ and metal type changed the cytotoxic activity. Finally, (2) showed both the highest ΦΔ (0.90) and the best photodynamic activity against the parasites studied (IC50 of 1.2 μM).
Collapse
|
13
|
de Morais FAP, Gonçalves RS, Vilsinski BH, Lazarin-Bidóia D, Balbinot RB, Tsubone TM, Brunaldi K, Nakamura CV, Hioka N, Caetano W. Hypericin photodynamic activity in DPPC liposomes - part II: stability and application in melanoma B16-F10 cancer cells. Photochem Photobiol Sci 2020; 19:620-630. [PMID: 32248218 DOI: 10.1039/c9pp00284g] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hypericin (Hyp) is considered a promising photosensitizer for Photodynamic Therapy (PDT), due to its high hydrophobicity, affinity for cell membranes, low toxicity and high photooxidation activity. In this study, Hyp photophysical properties and photodynamic activity against melanoma B16-F10 cells were optimized using DPPC liposomes (1,2-dipalmitoyl-sn-glycero-3-phosphocholine) as a drug delivery system. This nanoparticle is used as a cell membrane biomimetic model and solubilizes hydrophobic drugs. Hyp oxygen singlet lifetime (τ) in DPPC was approximately two-fold larger than that in P-123 micelles (Pluronic™ surfactants), reflecting a more hydrophobic environment provided by the DPPC liposome. On the other hand, singlet oxygen quantum yield values (ΦΔ1O2) in DPPC and P-123 were similar; Hyp molecules were preserved as monomers. The Hyp/DPPC liposome aqueous dispersion was stable during fluorescence emission and the liposome diameter remained stable for at least five days at 30 °C. However, the liposomes collapsed after the lyophilization/rehydration process, which was resolved by adding the lyoprotectant Trehalose to the liposome dispersion before lyophilization. Cell viability of the Hyp/DPPC formulation was assessed against healthy HaCat cells and high-metastatic melanoma B16-F10 cells. Hyp incorporated into the DPPC carrier presented a higher selectivity index than the Hyp sample previously solubilized in ethanol under the illumination effect. Moreover, the IC50 was lower for Hyp in DPPC than for Hyp pre-solubilized in ethanol. These results indicate the potential of the formulation of Hyp/DPPC for future biomedical applications in PDT treatment.
Collapse
Affiliation(s)
| | | | | | - Danielle Lazarin-Bidóia
- Universidade Estadual de Maringá, Technological Innovation Laboratory in the Pharmaceuticals and Cosmetics Development, Department of Health Sciences, 87020-900, Maringá, Paraná, Brazil
| | - Rodolfo Bento Balbinot
- Universidade Estadual de Maringá, Technological Innovation Laboratory in the Pharmaceuticals and Cosmetics Development, Department of Health Sciences, 87020-900, Maringá, Paraná, Brazil
| | - Tayana Mazin Tsubone
- Universidade Federal de Uberlandia, Institute of Chemistry, 38400-902, Minas, Gerais, Brazil
| | - Kellen Brunaldi
- Physiological Sciences Department, Universidade Estadual de Maringá, 87020-900, Maringá, Paraná, Brazil
| | - Celso Vatatu Nakamura
- Universidade Estadual de Maringá, Technological Innovation Laboratory in the Pharmaceuticals and Cosmetics Development, Department of Health Sciences, 87020-900, Maringá, Paraná, Brazil
| | - Noboru Hioka
- Chemistry Department, Universidade Estadual de Maringá, 87020-900, Maringá, Paraná, Brazil
| | - Wilker Caetano
- Chemistry Department, Universidade Estadual de Maringá, 87020-900, Maringá, Paraná, Brazil
| |
Collapse
|
14
|
Wu J, Wang W, Wang Z. Porphin-Based Carbon Dots for "Turn Off-On" Phosphate Sensing and Cell Imaging. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E326. [PMID: 32075049 PMCID: PMC7075202 DOI: 10.3390/nano10020326] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/02/2020] [Accepted: 02/08/2020] [Indexed: 01/03/2023]
Abstract
Porphin-based carbon dots (denoted as PCDs) are prepared through a one-step hydrothermal method by using meso-tetra (4-carboxyphenyl) porphin (TCPP), citric acid, and ethanediamine as precursor. PCDs give rise to the optimal photoluminescence at λex/λem = 375/645 nm, exhibit an excitation-independent property, excellent water solubility, and good biocompatibility, which provide red emission and avoid the autofluorescence as an efficient fluorescent imaging probe. On the other hand, when Eu3+ is added into PCDs, the carboxylate groups located on the surface of PCDs exhibit high affinity to Eu3+, resulting in the fluorescence of PCDs turning off via static quenching. In the presence of phosphate, owing to the strong coordination with Eu3+, the fluorescence of PCDs turns on. Based on this performance, a novel "turn off-on" phosphate sensing system is developed. The detection limit of this sensing system can attain 3.59 × 10-3 μmol L-1. This system has been utilized for the detection of phosphate in real samples successfully, which further demonstrates potential applications in biological diagnostic and environmental analysis.
Collapse
Affiliation(s)
| | | | - Zonghua Wang
- College of Chemistry and Chemical Engineering, Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, Qingdao University, Qingdao 266071, China; (J.W.); (W.W.)
| |
Collapse
|
15
|
Miyoshi Y, Kadono M, Okazaki S, Nishimura A, Kitamatsu M, Watanabe K, Ohtsuki T. Endosomal Escape of Peptide-Photosensitizer Conjugates Is Affected by Amino Acid Sequences near the Photosensitizer. Bioconjug Chem 2020; 31:916-922. [DOI: 10.1021/acs.bioconjchem.0c00046] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuichi Miyoshi
- Department of Medical Bioengineering, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan
| | - Maho Kadono
- Department of Medical Bioengineering, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan
| | - Shigetoshi Okazaki
- Preeminent Medical Photonics Education and Research Center, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan
| | - Ayano Nishimura
- Department of Applied Chemistry, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
| | - Mizuki Kitamatsu
- Department of Applied Chemistry, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
| | - Kazunori Watanabe
- Department of Medical Bioengineering, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan
- Department of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan
| | - Takashi Ohtsuki
- Department of Medical Bioengineering, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan
- Department of Interdisciplinary Science and Engineering in Health Systems, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan
| |
Collapse
|
16
|
Tsubone TM, Baptista MS, Itri R. Understanding membrane remodelling initiated by photosensitized lipid oxidation. Biophys Chem 2019; 254:106263. [DOI: 10.1016/j.bpc.2019.106263] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 08/13/2019] [Accepted: 09/03/2019] [Indexed: 12/19/2022]
|
17
|
Comparison of light-induced formation of reactive oxygen species and the membrane destruction of two mesoporphyrin derivatives in liposomes. Sci Rep 2019; 9:11312. [PMID: 31383921 PMCID: PMC6683201 DOI: 10.1038/s41598-019-47841-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 07/18/2019] [Indexed: 11/13/2022] Open
Abstract
The photodynamic effect requires the simultaneous presence of light, photosensitizer (PS) and molecular oxygen. In this process, the photoinduced damage of cells is caused by reactive oxygen species (ROS). Besides DNA, the other target of ROS is the membranes, separating internal compartments in living cells. Hence, the ability of ROS formation of porphyrins as PSs, in liposomes as simple models of cellular membranes is of outstanding interest. Earlier we compared the binding parameters and locations of mesoporphyrin IX dihydrochloride (MPCl) and mesoporphyrin IX dimethyl ester (MPE), in small unilamellar vesicles (SUV) made from various saturated phosphatidylcholines. In this study, we used the same kinds of samples for comparing the ROS forming ability. Triiodide production from potassium iodide because of light-induced ROS in the presence of molybdate catalyst was applied, and the amount of product was quantitatively followed by optical spectrometry. Furthermore, we demonstrated and carefully studied SUVs disruption as direct evidence of membrane destruction by the methods of dynamic light scattering (DLS) and fluorescence correlation spectroscopy (FCS), applying unsaturated phosphatidylcholines as membrane components. Although the ROS forming ability is more pronounced in the case of MPCl, we found that the measured disruption was more effective in the samples containing MPE.
Collapse
|
18
|
Hlapisi N, Motaung TE, Linganiso LZ, Oluwafemi OS, Songca SP. Encapsulation of Gold Nanorods with Porphyrins for the Potential Treatment of Cancer and Bacterial Diseases: A Critical Review. Bioinorg Chem Appl 2019; 2019:7147128. [PMID: 31182957 PMCID: PMC6515112 DOI: 10.1155/2019/7147128] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 02/04/2019] [Indexed: 01/23/2023] Open
Abstract
Cancer and bacterial diseases have been the most incidental diseases to date. According to the World Health Report 2018, at least every family is affected by cancer around the world. In 2012, 14.1 million people were affected by cancer, and that figure is bound to increase to 21.6 million in 2030. Medicine therefore sorts out ways of treatment using conventional methods which have been proven to have many side effects. Researchers developed photothermal and photodynamic methods to treat both cancer and bacterial diseases. These methods pose fewer effects on the biological systems but still no perfect method has been synthesized. The review serves to explore porphyrin and gold nanorods to be used in the treatment of cancer and bacterial diseases: porphyrins as photosensitizers and gold nanorods as delivery agents. In addition, the review delves into ways of incorporating photothermal and photodynamic therapy aimed at producing a less toxic, more efficacious, and specific compound for the treatment.
Collapse
Affiliation(s)
- Nthabeleng Hlapisi
- Department of Chemistry, University of Zululand, X1001, KwaDlangezwa, KwaZulu-Natal, South Africa
| | - Tshwafo E. Motaung
- Department of Chemistry, University of Zululand, X1001, KwaDlangezwa, KwaZulu-Natal, South Africa
| | - Linda Z. Linganiso
- Department of Chemistry, University of Zululand, X1001, KwaDlangezwa, KwaZulu-Natal, South Africa
| | - Oluwatobi S. Oluwafemi
- Department of Applied Chemistry, University of Johannesburg, P.O. Box 17011, Doornfontein, Johannesburg 2028, South Africa
- Centre for Nanomaterials Science Research, University of Johannesburg, Johannesburg, South Africa
| | - Sandile P. Songca
- Department of Chemistry, University of Kwazulu Natal, Kwazulu Natal, South Africa
| |
Collapse
|
19
|
Vignoni M, Urrutia MN, Junqueira HC, Greer A, Reis A, Baptista MS, Itri R, Thomas AH. Photo-Oxidation of Unilamellar Vesicles by a Lipophilic Pterin: Deciphering Biomembrane Photodamage. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:15578-15586. [PMID: 30457340 DOI: 10.1021/acs.langmuir.8b03302] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Pterins are natural products that can photosensitize the oxidation of DNA, proteins, and phospholipids. Recently, a new series of decyl-chain (i.e., lipophilic) pterins were synthesized and their photophysical properties were investigated. These decyl-pterins led to efficient intercalation in large unilamellar vesicles and produced, under UVA irradiation, singlet molecular oxygen, a highly oxidative species that react with polyunsaturated fatty acids (PUFAs) to form hydroperoxides. Here, we demonstrate that the association of 4-(decyloxy)pteridin-2-amine ( O-decyl-Ptr) to lipid membranes is key to its ability to trigger phospholipid oxidation in unilamellar vesicles of phosphatidylcholine rich in PUFAs used as model biomembranes. Our results show that O-decyl-Ptr is at least 1 order of magnitude more efficient photosensitizer of lipids than pterin (Ptr), the unsubstituted derivative of the pterin family, which is more hydrophilic and freely passes across lipid membranes. Lipid peroxidation photosensitized by O-decyl-Ptr was detected by the formation of conjugated dienes and oxidized lipids, such as hydroxy and hydroperoxide derivatives. These primary products undergo a rapid conversion into short-chain secondary products by cleavage of the fatty-acid chains, some of which are due to subsequent photosensitized reactions. As a consequence, a fast increase in membrane permeability is observed. Therefore, lipid oxidation induced by O-decyl-Ptr could promote cell photodamage due to the biomembrane integrity loss, which in turn may trigger cell death.
Collapse
Affiliation(s)
- Mariana Vignoni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Dep. de Química, Fac. de Cs. Exactas , Universidad Nacional de La Plata , CCT La Plata-CONICET, CC 16, Suc. 4 , 1900 La Plata , Argentina
| | - Maria Noel Urrutia
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Dep. de Química, Fac. de Cs. Exactas , Universidad Nacional de La Plata , CCT La Plata-CONICET, CC 16, Suc. 4 , 1900 La Plata , Argentina
| | - Helena C Junqueira
- Departamento de Bioquímica, Instituto de Química , Universidade de São Paulo , 05508-000 São Paulo , Brazil
| | - Alexander Greer
- Department of Chemistry , Brooklyn College, City University of New York , Brooklyn , 11210 New York , United States
- Ph.D. Program in Chemistry , The Graduate Center of the City University of New York , 365 Fifth Avenue , 10016 New York , New York , United States
| | - Ana Reis
- ICETA/REQUIMTE/LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences , University of Porto , 4169-007 Porto , Portugal
| | - Mauricio S Baptista
- Departamento de Bioquímica, Instituto de Química , Universidade de São Paulo , 05508-000 São Paulo , Brazil
| | - Rosangela Itri
- Institute of Physics , University of São Paulo , 05508-090 São Paulo , Brazil
| | - Andrés H Thomas
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Dep. de Química, Fac. de Cs. Exactas , Universidad Nacional de La Plata , CCT La Plata-CONICET, CC 16, Suc. 4 , 1900 La Plata , Argentina
| |
Collapse
|
20
|
Callaghan S, Senge MO. The good, the bad, and the ugly - controlling singlet oxygen through design of photosensitizers and delivery systems for photodynamic therapy. Photochem Photobiol Sci 2018; 17:1490-1514. [PMID: 29569665 DOI: 10.1039/c8pp00008e] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Singlet oxygen, although integral to photodynamic therapy, is notoriously uncontrollable, suffers from poor selectivity and has fast decomposition rates in biological media. Across the scientific community, there is a conscious effort to refine singlet oxygen interactions and initiate selective and controlled release to produce a consistent and reproducible therapeutic effect in target tissue. This perspective aims to provide an insight into the contemporary design principles behind photosensitizers and drug delivery systems that depend on a singlet oxygen response or controlled release. The discussion will be accompanied by in vitro and in vivo examples, in an attempt to highlight advancements in the field and future prospects for the more widespread application of photodynamic therapy.
Collapse
Affiliation(s)
- Susan Callaghan
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, Trinity College Dublin, the University of Dublin, 152-160 Pearse Street, Dublin 2, Ireland
| | - Mathias O Senge
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, Trinity College Dublin, the University of Dublin, 152-160 Pearse Street, Dublin 2, Ireland and Medicinal Chemistry, Trinity Translational Medicine Institute, Trinity Centre for Health Sciences, Trinity College Dublin, The University of Dublin, St. James's Hospital, Dublin 8, Ireland.
| |
Collapse
|
21
|
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.
Collapse
|
22
|
Chun MJ, Choi YK, Ahn DJ. Formation of nanopores in DiynePC-DPPC complex lipid bilayers triggered by on-demand photo-polymerization. RSC Adv 2018; 8:27988-27994. [PMID: 35542696 PMCID: PMC9084258 DOI: 10.1039/c8ra04908d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 07/20/2018] [Indexed: 11/21/2022] Open
Abstract
Vesicles have unique characteristics that enable the release of drugs as well as encapsulation while maintaining biocompatibility. A photo-polymerizable liposome composed of 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine (23:2 DiynePC) has been investigated as vehicles for triggered delivery of drugs to cells. In this study, we confirmed for the first time that supported lipid bilayers (SLBs) prepared with a 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC)/DiynePC mixture generated pores ca. 100-300 nm in size on the membrane after UV polymerization. This direct observation was done by analyzing the SLBs formed with the DPPC/DiynePC mixture by employing atomic force microscopy (AFM) in a liquid environment. However, photo-polymerization did not occur in the 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC)/DiynePC mixed bilayer and pores were not formed. A theoretical study was performed to explore the phase behavior of the lipid mixtures. A coarse-grained model of DiynePC was developed that is comparable with the Martini force field; the parameters were validated against atomistic simulations. Transition from fluidic to gel phase was observed only when DiynePC was mixed with DPPC, whereas the DOPC mixture remained fluidic over the entire domain. This implies a correlation between the formation of DiynePC-rich gel phase domains and the generation of pores after polymerization. The size of the pores were found to be controlled by the amount of polymerizable lipid which results in higher release rate of encapsulated calcein from the vesicles with larger pores.
Collapse
Affiliation(s)
- Min Jung Chun
- Department of Chemical and Biological Engineering, Korea University Seoul 02841 Republic of Korea
| | - Yeol Kyo Choi
- Department of Chemical and Biological Engineering, Korea University Seoul 02841 Republic of Korea
| | - Dong June Ahn
- Department of Chemical and Biological Engineering, Korea University Seoul 02841 Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University Seoul 02841 Republic of Korea
| |
Collapse
|
23
|
Das D, Tarafdar PK, Chakrabarti A. Structure-activity relationship of heme and its analogues in membrane damage and inhibition of fusion. FEBS Lett 2018; 592:2458-2465. [PMID: 29923605 DOI: 10.1002/1873-3468.13165] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 06/05/2018] [Accepted: 06/15/2018] [Indexed: 01/18/2023]
Abstract
Under pathological conditions, such as sickle cell disease and malaria, heme concentration increases considerably, and it induces membrane damage. As sickled and normal erythrocytes contain high cholesterol: phospholipid ratio, we investigated the role of lipid composition, chain length, and unsaturation on the partitioning and leakage of hemin in phospholipid vesicles. To establish structure-activity relationship in membrane damage, experiments with two other analogues, protoporphyrin-IX and hematoporphyrin (HP) were also carried out. Hemin and its analogues localize differently in membranes and exhibit distinct roles in partitioning, leakage and fusion. Hemin and HP trigger more leakage in the presence of aminophospholipids, whereas cholesterol buffers the destabilizing effect remarkably. Inhibition of fusion by hemin further suggests its unexplored and important role in membrane trafficking, particularly under diseased conditions.
Collapse
Affiliation(s)
- Debashree Das
- Biophysics & Structural Genomics Division, Saha Institute of Nuclear Physics, Kolkata, India
| | - Pradip K Tarafdar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Abhijit Chakrabarti
- Crystallography& Molecular Biology Division, Saha Institute of Nuclear Physics, Kolkata, India.,Homi Bhabha National Institute, Mumbai, India
| |
Collapse
|
24
|
Ileri Ercan N, Stroeve P, Tringe JW, Faller R. Molecular Dynamics Modeling of Methylene Blue-DOPC Lipid Bilayer Interactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:4314-4323. [PMID: 29553270 DOI: 10.1021/acs.langmuir.8b00372] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We present a coarse-grained MARTINI model for methylene blue (MB) and investigate the interactions of MB with dioleylphosphatidylcholine (DOPC) lipid bilayers by molecular dynamics simulations. Our results show that the charge state of MB and the oxidation degree of the DOPC bilayer play critical roles on membrane properties. Oxidation of the DOPC bilayer significantly increases permeability of water and MB molecules, irrespective of the charge state of MB. The most significant changes in membrane properties are obtained for peroxidized lipid bilayers in the presence of cationic MB, with ∼11% increase in the membrane area per lipid head group and ∼7 and 44% reduction in membrane thickness and lateral diffusivity, respectively.
Collapse
Affiliation(s)
- Nazar Ileri Ercan
- Department of Chemical Engineering , University of California Davis , One Shields Avenue , Davis , California 95616 , United States
- Lawrence Livermore National Laboratory , 7000 East Avenue , Livermore , California 94551 , United States
- Chemical Engineering Department , Bogazici University , Bebek, 34342 Istanbul , Turkey
| | - Pieter Stroeve
- Department of Chemical Engineering , University of California Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Joseph W Tringe
- Lawrence Livermore National Laboratory , 7000 East Avenue , Livermore , California 94551 , United States
| | - Roland Faller
- Department of Chemical Engineering , University of California Davis , One Shields Avenue , Davis , California 95616 , United States
| |
Collapse
|
25
|
Walalawela N, Vignoni M, Urrutia MN, Belh SJ, Greer EM, Thomas AH, Greer A. Kinetic Control in the Regioselective Alkylation of Pterin Sensitizers: A Synthetic, Photochemical, and Theoretical Study. Photochem Photobiol 2018; 94:834-844. [DOI: 10.1111/php.12905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 01/26/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Niluksha Walalawela
- Department of Chemistry Brooklyn College City University of New York Brooklyn NY
- Ph.D. Program in Chemistry The Graduate Center of the City University of New York New York NY
| | - Mariana Vignoni
- Department of Chemistry Brooklyn College City University of New York Brooklyn NY
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) Departamento de Química Facultad de Ciencias Exactas Universidad Nacional de La Plata (UNLP) CCT La Plata‐CONICET La Plata Argentina
| | - María Noel Urrutia
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) Departamento de Química Facultad de Ciencias Exactas Universidad Nacional de La Plata (UNLP) CCT La Plata‐CONICET La Plata Argentina
| | - Sarah J. Belh
- Department of Chemistry Brooklyn College City University of New York Brooklyn NY
- Ph.D. Program in Chemistry The Graduate Center of the City University of New York New York NY
| | - Edyta M. Greer
- Department of Natural Sciences Baruch College City University of New York New York NY
| | - Andrés H. Thomas
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) Departamento de Química Facultad de Ciencias Exactas Universidad Nacional de La Plata (UNLP) CCT La Plata‐CONICET La Plata Argentina
| | - Alexander Greer
- Department of Chemistry Brooklyn College City University of New York Brooklyn NY
- Ph.D. Program in Chemistry The Graduate Center of the City University of New York New York NY
| |
Collapse
|
26
|
Chen S, Poyer F, Garcia G, Fiorini-Debuisschert C, Rosilio V, Maillard P. Amphiphilic Glycoconjugated Porphyrin Heterodimers as Two-Photon Excitable Photosensitizers: Design, Synthesis, Photophysical and Photobiological Studies. ChemistrySelect 2018. [DOI: 10.1002/slct.201703013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Su Chen
- Department Chemistry and Modelisation and Imaging for Biology (CMIB); Institut Curie, Research Center; PSL Research University, Bât 110-112, Centre Universitaire; Rue Henri Becquerel F-91405 Orsay Cedex France
- CNRS UMR 9187 - INSERM U 1196; Université Paris-Saclay; Université Paris Sud 11, Bât 110-112, Centre Universitaire; Rue Henri Becquerel F-91405 Orsay Cedex France
| | - Florent Poyer
- Department Chemistry and Modelisation and Imaging for Biology (CMIB); Institut Curie, Research Center; PSL Research University, Bât 110-112, Centre Universitaire; Rue Henri Becquerel F-91405 Orsay Cedex France
- CNRS UMR 9187 - INSERM U 1196; Université Paris-Saclay; Université Paris Sud 11, Bât 110-112, Centre Universitaire; Rue Henri Becquerel F-91405 Orsay Cedex France
| | - Guillaume Garcia
- Department Chemistry and Modelisation and Imaging for Biology (CMIB); Institut Curie, Research Center; PSL Research University, Bât 110-112, Centre Universitaire; Rue Henri Becquerel F-91405 Orsay Cedex France
- CNRS UMR 9187 - INSERM U 1196; Université Paris-Saclay; Université Paris Sud 11, Bât 110-112, Centre Universitaire; Rue Henri Becquerel F-91405 Orsay Cedex France
| | | | - Véronique Rosilio
- Institut Galien Paris Sud, CNRS UMR 8612; Université Paris Sud 11; Université Paris-Saclay; 5 rue J.-B. Clément F-92296 Châtenay-Malabry France
| | - Philippe Maillard
- Department Chemistry and Modelisation and Imaging for Biology (CMIB); Institut Curie, Research Center; PSL Research University, Bât 110-112, Centre Universitaire; Rue Henri Becquerel F-91405 Orsay Cedex France
- CNRS UMR 9187 - INSERM U 1196; Université Paris-Saclay; Université Paris Sud 11, Bât 110-112, Centre Universitaire; Rue Henri Becquerel F-91405 Orsay Cedex France
| |
Collapse
|
27
|
Rodriguez-Muñiz GM, Gomez-Mendoza M, Nuin E, Andreu I, Marin ML, Miranda MA. "Snorkelling" vs. "diving" in mixed micelles probed by means of a molecular bathymeter. Org Biomol Chem 2017; 15:10281-10288. [PMID: 29186227 DOI: 10.1039/c7ob02595e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A photoactive bathymeter based on a carboxylic acid moiety covalently linked to a signalling methoxynaphthalene (MNP) fluorophore has been designed to prove the concept of "snorkelling" vs. "diving" in mixed micelles (MM). The carboxylic acid "floats" on the MM surface, while the MNP unit sinks deep in MM. The rate constants of MNP fluorescence quenching by iodide, which remains basically in water, consistently decrease with increasing spacer length, revealing different regions. This is associated with the distance MNP should "dive" in MM to achieve protection from aqueous reactants. Unequivocal proof of the exergonic photoinduced electron transfer was obtained from the UV-visible spectral signature of I3- upon steady-state photolysis. The applicability of the bathymeter was examined upon testing a family of MNP derivatives. The obtained results were validated by comparison with different lipophilicity tests: (i) a modified version of the Kow partition coefficient and (ii) the retention factor on thin layer chromatography. This concept could potentially be extended to test drugs or pharmacophores exhibiting any photoactive moiety.
Collapse
Affiliation(s)
- Gemma M Rodriguez-Muñiz
- Instituto Universitario Mixto de Tecnología Química (UPV-CSIC) Universitat Politècnica de València, Avda de los Naranjos s/n, 46022 Valencia, Spain
| | | | | | | | | | | |
Collapse
|
28
|
Kashef N, Akbarizare M, Razzaghi MR. In vitro Activity of Linezolid in Combination with Photodynamic Inactivation Against Staphylococcus aureus Biofilms. Avicenna J Med Biotechnol 2017; 9:44-48. [PMID: 28090280 PMCID: PMC5219822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Biofilm infections are a major challenge in medical practice. Bacteria that live in a biofilm phenotype are more resistant to both antimicrobial therapy and host immune responses compared to their planktonic counterparts. So, there is need for new therapeutic strategies to combat these infections. A promising approach [known as Photodynamic Inactivation (PDI)] to kill bacteria growing as biofilms uses light in combination with a photosensitizer to induce a phototoxic reaction which produces reactive oxygen species that can destroy lipids and proteins causing cell death. PDI does not always guarantee full success, so, combination of PDI with antibiotics may give increased efficiency. This study aimed to determine if PDI was effective in the eradication of Staphylococcus aureus (S. aureus) biofilms in combination with linezolid. METHODS The susceptibility of biofilm cultures of three S. aureus strains to Methylene Blue (MB) and Toluidine Blue O (TBO)-mediated PDI was determined alone and in combination with linezolid. RESULTS Bactericidal activity (≥3 log10 reduction in viable cell count) was not achieved with MB/TBO-PDI or antibiotic treatment alone. When antibiotic treatment was combined with TBO-PDI, a greater reduction in viable count than antibiotic alone was observed for two strains. CONCLUSION This study showed that although TBO-PDI did not have good bactericidal activity against S. aureus biofilms; it increased the antimicrobial activity of linezolid against these bacteria.
Collapse
Affiliation(s)
- Nasim Kashef
- Department of Microbiology, Faculty of Biology, College of Science, University of Tehran, Tehran, Iran,Corresponding author: Nasim Kashef, Ph.D., Department of Microbiology, Faculty of Biology, College of Science, University of Tehran, Tehran, Iran, Tel: +98 21 61113558, Fax: +98 21 66492992, E-mail:
| | - Mahboobeh Akbarizare
- Department of Microbiology, Faculty of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Mohammad Reza Razzaghi
- Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| |
Collapse
|
29
|
Chlorophyll a Covalently Bonded to Organo-Modified Translucent Silica Xerogels: Optimizing Fluorescence and Maximum Loading. Molecules 2016; 21:molecules21070961. [PMID: 27455223 PMCID: PMC6273260 DOI: 10.3390/molecules21070961] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 07/06/2016] [Accepted: 07/15/2016] [Indexed: 12/01/2022] Open
Abstract
Chlorophyll is a pyrrolic pigment with important optical properties, which is the reason it has been studied for many years. Recently, interest has been rising with respect to this molecule because of its outstanding physicochemical properties, particularly applicable to the design and development of luminescent materials, hybrid sensor systems, and photodynamic therapy devices for the treatment of cancer cells and bacteria. More recently, our research group has been finding evidence for the possibility of preserving these important properties of substrates containing chlorophyll covalently incorporated within solid pore matrices, such as SiO2, TiO2 or ZrO2 synthesized through the sol-gel process. In this work, we study the optical properties of silica xerogels organo-modified on their surface with allyl and phenyl groups and containing different concentrations of chlorophyll bonded to the pore walls, in order to optimize the fluorescence that these macrocyclic species displays in solution. The intention of this investigation was to determine the maximum chlorophyll a concentration at which this molecule can be trapped inside the pores of a given xerogel and to ascertain if this pigment remains trapped as a monomer, a dimer, or aggregate. Allyl and phenyl groups were deposited on the surface of xerogels in view of their important effects on the stability of the molecule, as well as over the fluorescence emission of chlorophyll; however, these organic groups allow the trapping of either chlorophyll a monomers or dimers. The determination of the above parameters allows finding the most adequate systems for subsequent in vitro or in vivo studies. The characterization of the obtained xerogels was performed through spectroscopic absorption, emission and excitation spectra. These hybrid systems can be employed as mimics of natural systems; the entrapment of chlorophyll inside pore matrices indicates that it is possible to exploit some of the most physicochemical properties of trapped chlorophyll for diverse technological applications. The data herein collected suggest the possibility of applying the developed methodology to other active, captive molecules in order to synthesize new hybrid materials with optimized properties, suitable to be applied in diverse technological fields.
Collapse
|
30
|
García-Sánchez MA, Serratos IN, Sosa R, Rojas-González F, Tello-Solís SR, Tapia-Esquivel T, González-García F, Esparza-Schulz JM, Huerta-Figueroa DE. Fluorescence and Textural Characterization of Ortho-Amine Tetraphenylporphyrin Covalently Bonded to Organo-Modified Silica Xerogels. J Fluoresc 2016; 26:1601-16. [PMID: 27324951 DOI: 10.1007/s10895-016-1846-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 05/30/2016] [Indexed: 11/28/2022]
Abstract
Most of the studies performed with porphyrins involve these species functionalized with peripheral substituents lying on the same macrocyclic molecular plane. The main objective of this work deals with the successful preservation and optimization of the fluorescence of a uncommonly used porphyrin species, i.e. tetrakis-(ortho-amino-phenyl)-porphyrin; a molecule with substituents localized not only at one but at both sides of its molecular plane. In cases like this, it must be stressed that fluorescence can only be partially preserved; nevertheless, intense fluorescence can still be reached by following a twofold functionalization strategy involving: (i) the bonding of substituted macrocycles to the pore walls of (ii) organo-modified silica monoliths synthesized by the sol-gel method. The analysis of both absorption and emission UV spectra evidenced a radiation energy transfer taking place between the porphyrin and the host silica matrix. Our results showed that the adequate displaying of the optical properties of macrocyclic species trapped in SiO2 xerogels depend on the polarity existing inside the pores, a property which can be tuned up through the adequate selection of organic groups used to modify the surface of the pore cavities. Additionally, the pore widths attained in the final xerogels can vary depending on the identity of the organic groups attached to the network. All these facts finally demonstrated that, even if using inefficient surface functionalization species, such as ortho-substituted tetraphenylporphyrins, it is still possible to modulate the pore shape, pore size, and physicochemical environment created around the trapped macrocycles. The most important aspect related to this research deals with the fact that the developed methodology offers a real possibility of controlling both the textural and morphological characteristics of a new kind of hybrid porous materials and to optimize the physicochemical properties of diverse active molecules trapped inside the pores of these materials.
Collapse
Affiliation(s)
- M A García-Sánchez
- Department of Chemistry, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F., 09340, México.
| | - I N Serratos
- Department of Chemistry, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F., 09340, México
| | - R Sosa
- Department of Physics, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F., 09340, México
| | - F Rojas-González
- Department of Chemistry, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F., 09340, México
| | - S R Tello-Solís
- Department of Chemistry, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F., 09340, México
| | - T Tapia-Esquivel
- Department of Physics, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F., 09340, México
| | - F González-García
- Department of Processes and Hydraulics Engineering, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F., 09340, México
| | - J M Esparza-Schulz
- Department of Chemistry, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F., 09340, México
| | - D E Huerta-Figueroa
- Department of Physics, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F., 09340, México
| |
Collapse
|
31
|
Abstract
INTRODUCTION Early detection of lung cancer in high-risk individuals reduces mortality. Low-dose spiral computed tomography (LDCT) is the current standard but suffers from an exceedingly high false-positive rate (>96%) leading to unnecessary and potentially dangerous procedures. We, therefore, set out to develop a simple, noninvasive, and quantitative assay to detect lung cancer. METHODS This proof-of-concept study evaluated the sensitivity/specificity of the CyPath Early Lung Cancer Detection Assay to correctly classify LDCT-confirmed cohorts of high-risk control (n = 102) and cancer (n = 26) subjects. Fluorescence intensity parameters of red fluorescent cells (RFCs) from tetra (4-carboxyphenyl) porphyrin (TCPP)-labeled lung sputum samples and subjects' baseline characteristics were assessed for their predictive power by multivariable logistic regression. A receiver operating characteristic curve was constructed to evaluate the sensitivity/specificity of the CyPath assay. RESULTS RFCs were detectable in cancer subjects more often than in high-risk ones (p = 0.015), and their characteristics differed between cohorts. Two independent predictors of cancer were the mean of RFC average fluorescence intensity/area per subject (p < 0.001) and years smoked (p = 0.003). The CyPath-based classifier had an overall accuracy of 81% in the test population; false-positive rate of 40% and negative predictive value of 83%. CONCLUSIONS The tetra (4-carboxyphenyl) porphyrin -based CyPath assay correctly classified study participants into cancer or high-risk cohorts with considerable accuracy. Optimizing sputum collection, sample reading, and refining the classifier should improve sensitivity and specificity. The CyPath assay thus has the potential to complement LDCT screening or serve as a stand-alone approach for early lung cancer detection.
Collapse
|
32
|
Transmittance and Autofluorescence of Neonatal Rat Stratum Corneum: Nerolidol Increases the Dynamics and Partitioning of Protoporphyrin IX into Intercellular Membranes. J Fluoresc 2016; 26:709-17. [DOI: 10.1007/s10895-015-1758-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 12/28/2015] [Indexed: 10/22/2022]
|
33
|
Repeatable and adjustable on-demand sciatic nerve block with phototriggerable liposomes. Proc Natl Acad Sci U S A 2015; 112:15719-24. [PMID: 26644576 DOI: 10.1073/pnas.1518791112] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Pain management would be greatly enhanced by a formulation that would provide local anesthesia at the time desired by patients and with the desired intensity and duration. To this end, we have developed near-infrared (NIR) light-triggered liposomes to provide on-demand adjustable local anesthesia. The liposomes contained tetrodotoxin (TTX), which has ultrapotent local anesthetic properties. They were made photo-labile by encapsulation of a NIR-triggerable photosensitizer; irradiation at 730 nm led to peroxidation of liposomal lipids, allowing drug release. In vitro, 5.6% of TTX was released upon NIR irradiation, which could be repeated a second time. The formulations were not cytotoxic in cell culture. In vivo, injection of liposomes containing TTX and the photosensitizer caused an initial nerve block lasting 13.5 ± 3.1 h. Additional periods of nerve block could be induced by irradiation at 730 nm. The timing, intensity, and duration of nerve blockade could be controlled by adjusting the timing, irradiance, and duration of irradiation. Tissue reaction to this formulation and the associated irradiation was benign.
Collapse
|
34
|
Timor R, Weitman H, Waiskopf N, Banin U, Ehrenberg B. PEG-Phospholipids Coated Quantum Rods as Amplifiers of the Photosensitization Process by FRET. ACS APPLIED MATERIALS & INTERFACES 2015; 7:21107-21114. [PMID: 26334672 DOI: 10.1021/acsami.5b04318] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Singlet oxygen ((1)O2) generated upon photostimulation of photosensitizer molecules is a highly reactive specie which is utilized in photodynamic therapy. Recent studies have shown that semiconductor nanoparticles can be used as donors in fluorescence resonance energy transfer (FRET) process to excite attached photosensitizer molecules. In these studies, their unique properties, such as low nanoscale size, long-term photostability, wide broad absorbance band, large absorption cross section, and narrow and tunable emission bands were used to provide advantages over the traditional methods to produce singlet oxygen. Previous studies that achieved this goal, however, showed some limitations, such as low FRET efficiency, poor colloidal stability, nonspecific interactions, and/or complex preparation procedure. In this work, we developed and characterized a novel system of semiconductor quantum rods (QRs) and the photosensitizer meso-tetra(hydroxyphenyl) chlorin (mTHPC), as a model system that produces singlet oxygen without these limitations. A simple two-step preparation method is shown; Hydrophobic CdSe/CdS QRs are solubilized in aqueous solutions by encapsulation with lecithin and PEGylated phospholipid (PEG-PL) of two lipid lengths: PEG350 or PEG2000. Then, the hydrophobic photosensitizer mTHPC, was intercalated into the new amphiphilic PEG-PL coating of the QR, providing a strong attachment to the nanoparticle without covalent linkage. These PEGylated QR (eQR)-mTHPC nanocomposites show efficient FRET processes upon light stimulation of the QR component which results in efficient production of singlet oxygen. The results demonstrate the potential for future use of this concept in photodynamic therapy schemes.
Collapse
Affiliation(s)
- Reut Timor
- Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar Ilan University , Ramat Gan 52900, Israel
| | - Hana Weitman
- Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar Ilan University , Ramat Gan 52900, Israel
| | - Nir Waiskopf
- Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
| | - Uri Banin
- Institute of Chemistry and Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
| | - Benjamin Ehrenberg
- Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar Ilan University , Ramat Gan 52900, Israel
| |
Collapse
|
35
|
Sahin T, Harris MA, Vairaprakash P, Niedzwiedzki DM, Subramanian V, Shreve AP, Bocian DF, Holten D, Lindsey JS. Self-Assembled Light-Harvesting System from Chromophores in Lipid Vesicles. J Phys Chem B 2015; 119:10231-43. [PMID: 26230425 DOI: 10.1021/acs.jpcb.5b04841] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lipid vesicles are used as the organizational structure of self-assembled light-harvesting systems. Following analysis of 17 chromophores, six were selected for inclusion in vesicle-based antennas. The complementary absorption features of the chromophores span the near-ultraviolet, visible, and near-infrared region. Although the overall concentration of the pigments is low (~1 μM for quantitative spectroscopic studies) in a cuvette, the lipid-vesicle system affords high concentration (≥10 mM) in the bilayer for efficient energy flow from donor to acceptor. Energy transfer was characterized in 13 representative binary mixtures using static techniques (fluorescence-excitation versus absorptance spectra, quenching of donor fluorescence, modeling emission spectra of a mixture versus components) and time-resolved spectroscopy (fluorescence, ultrafast absorption). Binary donor-acceptor systems that employ a boron-dipyrrin donor (S0 ↔ S1 absorption/emission in the blue-green) and a chlorin or bacteriochlorin acceptor (S0 ↔ S1 absorption/emission in the red or near-infrared) have an average excitation-energy-transfer efficiency (ΦEET) of ~50%. Binary systems with a chlorin donor and a chlorin or bacteriochlorin acceptor have ΦEET ∼ 85%. The differences in ΦEET generally track the donor-fluorescence/acceptor-absorption spectral overlap within a dipole-dipole coupling (Förster) mechanism. Substantial deviation from single-exponential decay of the excited donor (due to the dispersion of donor-acceptor distances) is expected and observed. The time profiles and resulting ΦEET are modeled on the basis of (Förster) energy transfer between chromophores relatively densely packed in a two-dimensional compartment. Initial studies of two ternary and one quaternary combination of chromophores show the enhanced spectral coverage and energy-transfer efficacy expected on the basis of the binary systems. Collectively, this approach may provide one of the simplest designs for self-assembled light-harvesting systems that afford broad solar collection and efficient energy transfer.
Collapse
Affiliation(s)
- Tuba Sahin
- †Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Michelle A Harris
- ‡Department of Chemistry, Washington University, St. Louis, Missouri 63130-4889, United States
| | - Pothiappan Vairaprakash
- †Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| | - Dariusz M Niedzwiedzki
- §Photosynthetic Antenna Research Center, Washington University, St. Louis, Missouri 63130-4889, United States
| | - Vijaya Subramanian
- ∥Center for Biomedical Engineering and Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - Andrew P Shreve
- ∥Center for Biomedical Engineering and Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
| | - David F Bocian
- ⊥Department of Chemistry, University of California, Riverside, California 92521-0403, United States
| | - Dewey Holten
- ‡Department of Chemistry, Washington University, St. Louis, Missouri 63130-4889, United States
| | - Jonathan S Lindsey
- †Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695-8204, United States
| |
Collapse
|
36
|
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]
|
37
|
Sine J, Urban C, Thayer D, Charron H, Valim N, Tata DB, Schiff R, Blumenthal R, Joshi A, Puri A. Photo activation of HPPH encapsulated in "Pocket" liposomes triggers multiple drug release and tumor cell killing in mouse breast cancer xenografts. Int J Nanomedicine 2014; 10:125-45. [PMID: 25565809 PMCID: PMC4278788 DOI: 10.2147/ijn.s72143] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We recently reported laser-triggered release of photosensitive compounds from liposomes containing dipalmitoylphosphatidylcholine (DPPC) and 1,2 bis(tricosa-10,12-diynoyl)-sn-glycero-3-phosphocholine (DC(8,9)PC). We hypothesized that the permeation of photoactivated compounds occurs through domains of enhanced fluidity in the liposome membrane and have thus called them "Pocket" liposomes. In this study we have encapsulated the red light activatable anticancer photodynamic therapy drug 2-(1-Hexyloxyethyl)-2-devinyl pyropheophorbide-a (HPPH) (Ex/Em410/670 nm) together with calcein (Ex/Em490/517 nm) as a marker for drug release in Pocket liposomes. A mole ratio of 7.6:1 lipid:HPPH was found to be optimal, with >80% of HPPH being included in the liposomes. Exposure of liposomes with a cw-diode 660 nm laser (90 mW, 0-5 minutes) resulted in calcein release only when HPPH was included in the liposomes. Further analysis of the quenching ratios of liposome-entrapped calcein in the laser treated samples indicated that the laser-triggered release occurred via the graded mechanism. In vitro studies with MDA-MB-231-LM2 breast cancer cell line showed significant cell killing upon treatment of cell-liposome suspensions with the laser. To assess in vivo efficacy, we implanted MDA-MB-231-LM2 cells containing the luciferase gene along the mammary fat pads on the ribcage of mice. For biodistribution experiments, trace amounts of a near infrared lipid probe DiR (Ex/Em745/840 nm) were included in the liposomes. Liposomes were injected intravenously and laser treatments (90 mW, 0.9 cm diameter, for an exposure duration ranging from 5-8 minutes) were done 4 hours postinjection (only one tumor per mouse was treated, keeping the second flank tumor as control). Calcein release occurred as indicated by an increase in calcein fluorescence from laser treated tumors only. The animals were observed for up to 15 days postinjection and tumor volume and luciferase expression was measured. A significant decrease in luciferase expression and reduction in tumor volume was observed only in laser treated animal groups injected with liposomes containing HPPH. Histopathological examination of tumor tissues indicated tumor necrosis resulting from laser treatment of the HPPH-encapsulated liposomes that were taken up into the tumor area.
Collapse
Affiliation(s)
- Jessica Sine
- Membrane Structure and Function Section, Basic Research Laboratory, Center for Cancer Research, National Cancer Institute - Frederick, Frederick, MD, USA
| | - Cordula Urban
- Department of Radiology, Baylor College of Medicine, Houston, TX, USA
| | - Derek Thayer
- Membrane Structure and Function Section, Basic Research Laboratory, Center for Cancer Research, National Cancer Institute - Frederick, Frederick, MD, USA
| | - Heather Charron
- Department of Radiology, Baylor College of Medicine, Houston, TX, USA
| | - Niksa Valim
- Department of Radiology, Baylor College of Medicine, Houston, TX, USA
| | - Darrell B Tata
- US Food and Drug Administration, CDRH/OSEL/Division of Physics, White Oak Campus, MD, USA
| | - Rachel Schiff
- Lester and Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA
| | - Robert Blumenthal
- Membrane Structure and Function Section, Basic Research Laboratory, Center for Cancer Research, National Cancer Institute - Frederick, Frederick, MD, USA
| | - Amit Joshi
- Department of Radiology, Baylor College of Medicine, Houston, TX, USA
| | - Anu Puri
- Membrane Structure and Function Section, Basic Research Laboratory, Center for Cancer Research, National Cancer Institute - Frederick, Frederick, MD, USA
| |
Collapse
|
38
|
Craig RA, McCoy CP, Gorman SP, Jones DS. Photosensitisers - the progression from photodynamic therapy to anti-infective surfaces. Expert Opin Drug Deliv 2014; 12:85-101. [PMID: 25247277 DOI: 10.1517/17425247.2015.962512] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION The application of light as a stimulus in pharmaceutical systems and the associated ability to provide precise spatiotemporal control over location, wavelength and intensity, allowing ease of external control independent of environmental conditionals, has led to its increased use. Of particular note is the use of light with photosensitisers. AREAS COVERED Photosensitisers are widely used in photodynamic therapy to cause a cidal effect towards cells on irradiation due to the generation of reactive oxygen species. These cidal effects have also been used to treat infectious diseases. The effects and benefits of photosensitisers in the treatment of such conditions are still being developed and further realised, with the design of novel delivery strategies. This review provides an overview of the realisation of the pharmaceutically relevant uses of photosensitisers, both in the context of current research and in terms of current clinical application, and looks to the future direction of research. EXPERT OPINION Substantial advances have been and are being made in the use of photosensitisers. Of particular note are their antimicrobial applications, due to absence of resistance that is so frequently associated with conventional treatments. Their potency of action and the ability to immobilise to polymeric supports is opening a wide range of possibilities with great potential for use in healthcare infection prevention strategies.
Collapse
Affiliation(s)
- Rebecca A Craig
- Queen's University Belfast, School of Pharmacy , 97 Lisburn Road, Belfast, BT9 7BL , UK
| | | | | | | |
Collapse
|
39
|
Dupont S, Rapoport A, Gervais P, Beney L. Survival kit of Saccharomyces cerevisiae for anhydrobiosis. Appl Microbiol Biotechnol 2014; 98:8821-34. [DOI: 10.1007/s00253-014-6028-5] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 08/08/2014] [Accepted: 08/10/2014] [Indexed: 01/08/2023]
|
40
|
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
| |
Collapse
|
41
|
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]
|
42
|
On tuning the fluorescence emission of porphyrin free bases bonded to the pore walls of organo-modified silica. Molecules 2014; 19:2261-85. [PMID: 24566303 PMCID: PMC6271852 DOI: 10.3390/molecules19022261] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 01/29/2014] [Accepted: 02/07/2014] [Indexed: 11/25/2022] Open
Abstract
A sol-gel methodology has been duly developed in order to perform a controlled covalent coupling of tetrapyrrole macrocycles (e.g., porphyrins, phthalocyanines, naphthalocyanines, chlorophyll, etc.) to the pores of metal oxide networks. The resulting absorption and emission spectra intensities in the UV-VIS-NIR range have been found to depend on the polarity existing inside the pores of the network; in turn, this polarization can be tuned through the attachment of organic substituents to the tetrapyrrrole macrocycles before bonding them to the pore network. The paper shows clear evidence of the real possibility of maximizing fluorescence emissions from metal-free bases of substituted tetraphenylporphyrins, especially when these molecules are bonded to the walls of functionalized silica surfaces via the attachment of alkyl or aryl groups arising from the addition of organo-modified alkoxides.
Collapse
|
43
|
Phototriggerable liposomes: current research and future perspectives. Pharmaceutics 2013; 6:1-25. [PMID: 24662363 PMCID: PMC3978522 DOI: 10.3390/pharmaceutics6010001] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 11/28/2013] [Accepted: 12/05/2013] [Indexed: 11/21/2022] Open
Abstract
The field of cancer nanomedicine is considered a promising area for improved delivery of bioactive molecules including drugs, pharmaceutical agents and nucleic acids. Among these, drug delivery technology has made discernible progress in recent years and the areas that warrant further focus and consideration towards technological developments have also been recognized. Development of viable methods for on-demand spatial and temporal release of entrapped drugs from the nanocarriers is an arena that is likely to enhance the clinical suitability of drug-loaded nanocarriers. One such approach, which utilizes light as the external stimulus to disrupt and/or destabilize drug-loaded nanoparticles, will be the discussion platform of this article. Although several phototriggerable nanocarriers are currently under development, I will limit this review to the phototriggerable liposomes that have demonstrated promise in the cell culture systems at least (but not the last). The topics covered in this review include (i) a brief summary of various phototriggerable nanocarriers; (ii) an overview of the application of liposomes to deliver payload of photosensitizers and associated technologies; (iii) the design considerations of photoactivable lipid molecules and the chemical considerations and mechanisms of phototriggering of liposomal lipids; (iv) limitations and future directions for in vivo, clinically viable triggered drug delivery approaches and potential novel photoactivation strategies will be discussed.
Collapse
|
44
|
Gong HY, Sun MX, Hu S, Tao YY, Gao B, Li GD, Cai ZD, Yao JZ. Benzochloroporphyrin Derivative Induced Cytotoxicity and Inhibition of Tumor Recurrence During Photodynamic Therapy for Osteosarcoma. Asian Pac J Cancer Prev 2013; 14:3351-5. [DOI: 10.7314/apjcp.2013.14.5.3351] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
45
|
Mir Y, Elrington SA, Hasan T. A new nanoconstruct for epidermal growth factor receptor-targeted photo-immunotherapy of ovarian cancer. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2013; 9:1114-22. [PMID: 23485748 DOI: 10.1016/j.nano.2013.02.005] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 01/09/2013] [Accepted: 02/17/2013] [Indexed: 11/26/2022]
Abstract
UNLABELLED Targeted photodynamic therapy (TPDT) involves the administration of a photosensitizer (PS) conjugated with a targeting moiety followed by light activation. The systemic toxicity associated with conventional therapy may thus be significantly reduced in TPDT due to the dual selectivity provided by the spatial localization of the illumination as well as the target-localizing ability of the conjugate. Herein, a photo-immuno-conjugate-associating-liposome (PICAL) for TPDT has been developed in which the FDA approved benzoporphyrin derivative monoacid A (BPD) and the Cetuximab antibody for epidermal growth factor receptor (EGFR) were associated into a stable Preformed Plain Liposome (PPL) by passive physical adsorption. Results have shown that the BPD molecules adsorbed into PICAL have stable optical behavior and a higher fluorescence quantum yield than free-BPD. The Cetuximab adsorbed into PPL selectively binds to cells that overexpress EGFR. The inhibition of EGFR signaling by PICAL has enhanced PDT-mediated ovarian cancer cell death. FROM THE CLINICAL EDITOR In this basic science study, a photo-immuno-conjugate-associating-liposome for targeted photodynamic therapy is investigated. The FDA-approved benzoporphyrin derivative monoacid A and an epidermal growth factor receptor antibody were assembed into a stable Preformed Plain Liposome (PPL) by passive physical adsorption. The authors demonstrate therapeutic efficacy of the above construct in an ovarian tumor system.
Collapse
Affiliation(s)
- Youssef Mir
- Wellman Center for Photomedicine, Department of Dermatology, Bartlett Hall 314, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | | | | |
Collapse
|
46
|
García-Sánchez MA, Rojas-González F, Menchaca-Campos EC, Tello-Solís SR, Quiroz-Segoviano RIY, Diaz-Alejo LA, Salas-Bañales E, Campero A. Crossed and linked histories of tetrapyrrolic macrocycles and their use for engineering pores within sol-gel matrices. Molecules 2013; 18:588-653. [PMID: 23292327 PMCID: PMC6270341 DOI: 10.3390/molecules18010588] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 12/20/2012] [Accepted: 12/25/2012] [Indexed: 11/17/2022] Open
Abstract
The crossed and linked histories of tetrapyrrolic macrocycles, interwoven with new research discoveries, suggest that Nature has found in these structures a way to ensure the continuity of life. For diverse applications porphyrins or phthalocyanines must be trapped inside solid networks, but due to their nature, these compounds cannot be introduced by thermal diffusion; the sol-gel method makes possible this insertion through a soft chemical process. The methodologies for trapping or bonding macrocycles inside pristine or organo-modified silica or inside ZrO₂ xerogels were developed by using phthalocyanines and porphyrins as molecular probes. The sizes of the pores formed depend on the structure, the cation nature, and the identities and positions of peripheral substituents of the macrocycle. The interactions of the macrocyclic molecule and surface Si-OH groups inhibit the efficient displaying of the macrocycle properties and to avoid this undesirable event, strategies such as situating the macrocycle far from the pore walls or to exchange the Si-OH species by alkyl or aryl groups have been proposed. Spectroscopic properties are better preserved when long unions are established between the macrocycle and the pore walls, or when oligomeric macrocyclic species are trapped inside each pore. When macrocycles are trapped inside organo-modified silica, their properties result similar to those displayed in solution and their intensities depend on the length of the alkyl chain attached to the matrix. These results support the prospect of tuning up the pore size, surface area, and polarity inside the pore cavities in order to prepare efficient catalytic, optical, sensoring, and medical systems. The most important feature is that research would confirm again that tetrapyrrolic macrocycles can help in the development of the authentic pore engineering in materials science.
Collapse
Affiliation(s)
- Miguel A García-Sánchez
- Departamento de Quimica, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Vicentina, D. F. 09340, Mexico.
| | | | | | | | | | | | | | | |
Collapse
|
47
|
Soares ARM, Thanaiah Y, Taniguchi M, Lindsey JS. Aqueous–membrane partitioning of β-substituted porphyrins encompassing diverse polarity. NEW J CHEM 2013. [DOI: 10.1039/c3nj41042k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
48
|
Cordeiro RM, Miotto R, Baptista MS. Photodynamic Efficiency of Cationic meso-Porphyrins at Lipid Bilayers: Insights from Molecular Dynamics Simulations. J Phys Chem B 2012; 116:14618-27. [DOI: 10.1021/jp308179h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Rodrigo M. Cordeiro
- Centro de
Ciências Naturais
e Humanas, Universidade Federal do ABC,
Rua Santa Adélia 166, CEP 09210-170, Santo André (SP),
Brazil
| | - Ronei Miotto
- Centro de
Ciências Naturais
e Humanas, Universidade Federal do ABC,
Rua Santa Adélia 166, CEP 09210-170, Santo André (SP),
Brazil
| | - Maurício S. Baptista
- Departamento
de
Bioquímica, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes
748, CEP 05508-900, São Paulo (SP), Brazil
| |
Collapse
|
49
|
Cellamare BM, Fini P, Agostiano A, Sortino S, Cosma P. Identification of Ros Produced by Photodynamic Activity of Chlorophyll/Cyclodextrin Inclusion Complexes. Photochem Photobiol 2012; 89:432-41. [DOI: 10.1111/j.1751-1097.2012.01238.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 09/07/2012] [Indexed: 01/03/2023]
Affiliation(s)
- Barbara M. Cellamare
- Dipartimento di Chimica; Università degli Studi “Aldo Moro” di Bari; Bari; Italy
| | | | | | - Salvatore Sortino
- Laboratory of Photochemistry; Department of Drug Sciences; University of Catania; Catania; Italy
| | | |
Collapse
|
50
|
Musbat L, Weitman H, Ehrenberg B. Azide quenching of singlet oxygen in suspensions of microenvironments of neutral and surface charged liposomes and micelles. Photochem Photobiol 2012; 89:253-8. [PMID: 22827592 DOI: 10.1111/j.1751-1097.2012.01212.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 07/18/2012] [Indexed: 11/28/2022]
Abstract
The azide anion is often used as a physical quencher of singlet oxygen, the important active intermediate in photosensitized oxidation. An observed effect of azide on the rate of a reaction is considered an indication to the involvement of singlet oxygen. In most biological photosensitizations, the light-absorbing sensitizer is located in a membrane or in an intracellular organelle, whereas azide is water soluble. The quenching it causes relies on a physical encounter with singlet oxygen during the latter's short lifetime. This can happen either if azide penetrates into the membrane's lipid phase or if singlet oxygen is intercepted when diffusing in the aqueous phase. We demonstrate in this article the difference, in liposomes' suspension, between the effect of azide when using a water-soluble and membrane-bound chemical targets of singlet oxygen, whereas this difference does not exist when micelles are used. We explain the difference on the population of sensitizer and target in the liposome vs micelle. We also show the effect that exists on azide quenching of singlet oxygen by electrically charged lipids in liposomes. This is a result of the accumulation or dilution of azide in the debye layer near the membranes' surface, due to the surface Gouy-Chapman potential.
Collapse
Affiliation(s)
- Lihi Musbat
- Department of Physics, Institute of Nanotechnology and Advanced Materials Bar Ilan University, Ramat Gan, Israel
| | | | | |
Collapse
|