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Comincini S, Manai F, Sorrenti M, Perteghella S, D’Amato C, Miele D, Catenacci L, Bonferoni MC. Development of Berberine-Loaded Nanoparticles for Astrocytoma Cells Administration and Photodynamic Therapy Stimulation. Pharmaceutics 2023; 15:pharmaceutics15041078. [PMID: 37111564 PMCID: PMC10146331 DOI: 10.3390/pharmaceutics15041078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/15/2023] [Accepted: 03/24/2023] [Indexed: 03/30/2023] Open
Abstract
Berberine (BBR) is known for its antitumor activity and photosensitizer properties in anti-cancer photodynamic therapy (PDT), and it has previously been favorably assayed against glioblastoma multiforme (GBM)-derived cells. In this work, two BBR hydrophobic salts, dodecyl sulfate (S) and laurate (L), have been encapsulated in PLGA-based nanoparticles (NPs), chitosan-coated by the addition of chitosan oleate in the preparation. NPs were also further functionalized with folic acid. All the BBR-loaded NPs were efficiently internalized into T98G GBM established cells, and internalization increased in the presence of folic acid. However, the highest mitochondrial co-localization percentages were obtained with BBR-S NPs without folic acid content. In the T98G cells, BBR-S NPs appeared to be the most efficient in inducing cytotoxicity events and were therefore selected to assess the effect of photodynamic stimulation (PDT). As a result, PDT potentiated the viability reduction for the BBR-S NPs at all the studied concentrations, and a roughly 50% reduction of viability was obtained. No significant cytotoxic effect on normal rat primary astrocytes was observed. In GBM cells, a significant increase in early and late apoptotic events was scored by BBR NPs, with a further increase following the PDT scheme. Furthermore, a significantly increased depolarization of mitochondria was highlighted following BBR-S NPs’ internalization and mostly after PDT stimulation, compared to untreated and PDT-only treated cells. In conclusion, these results highlighted the efficacy of the BBR-NPs-based strategy coupled with photoactivation approaches to induce favorable cytotoxic effects in GBM cells.
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Carriero F, Martinelli C, Gabriele F, Barbieri G, Zanoletti L, Milanesi G, Casali C, Azzalin A, Manai F, Paolillo M, Comincini S. Berberine Photo-Activation Potentiates Cytotoxicity in Human Astrocytoma Cells through Apoptosis Induction. J Pers Med 2021; 11:942. [PMID: 34683083 PMCID: PMC8541605 DOI: 10.3390/jpm11100942] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/14/2021] [Accepted: 09/21/2021] [Indexed: 12/14/2022] Open
Abstract
Photodynamic therapy (PDT) has recently attracted interest as an innovative and adjuvant treatment for different cancers including malignant gliomas. Among these, Glioblastoma (GBM) is the most prevalent neoplasm in the central nervous system. Despite conventional therapeutic approaches that include surgical removal, radiation, and chemotherapy, GBM is characterized by an extremely poor prognosis and a high rate of recurrence. PDT is a physical process that induces tumor cell death through the genesis and accumulation of reactive oxygen species (ROS) produced by light energy interaction with a photosensitizing agent. In this contribution, we explored the potentiality of the plant alkaloid berberine (BBR) as a photosensitizing and cytotoxic agent coupled with a PDT scheme using a blue light source in human established astrocytoma cell lines. Our data mainly indicated for the combined BBR-PDT scheme a potent activation of the apoptosis pathway, through a massive ROS production, a great extent of mitochondria depolarization, and the sub-sequent activation of caspases. Altogether, these results demonstrated that BBR is an efficient photosensitizer agent and that its association with PDT may be a potential anticancer strategy for high malignant gliomas.
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Affiliation(s)
- Francesca Carriero
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy; (F.C.); (C.M.); (F.G.); (G.B.); (L.Z.); (G.M.); (C.C.); (A.A.); (F.M.)
| | - Carolina Martinelli
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy; (F.C.); (C.M.); (F.G.); (G.B.); (L.Z.); (G.M.); (C.C.); (A.A.); (F.M.)
- SKYTEC Srl, 20147 Milan, Italy
| | - Fabio Gabriele
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy; (F.C.); (C.M.); (F.G.); (G.B.); (L.Z.); (G.M.); (C.C.); (A.A.); (F.M.)
| | - Giulia Barbieri
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy; (F.C.); (C.M.); (F.G.); (G.B.); (L.Z.); (G.M.); (C.C.); (A.A.); (F.M.)
| | - Lisa Zanoletti
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy; (F.C.); (C.M.); (F.G.); (G.B.); (L.Z.); (G.M.); (C.C.); (A.A.); (F.M.)
| | - Gloria Milanesi
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy; (F.C.); (C.M.); (F.G.); (G.B.); (L.Z.); (G.M.); (C.C.); (A.A.); (F.M.)
| | - Claudio Casali
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy; (F.C.); (C.M.); (F.G.); (G.B.); (L.Z.); (G.M.); (C.C.); (A.A.); (F.M.)
| | - Alberto Azzalin
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy; (F.C.); (C.M.); (F.G.); (G.B.); (L.Z.); (G.M.); (C.C.); (A.A.); (F.M.)
| | - Federico Manai
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy; (F.C.); (C.M.); (F.G.); (G.B.); (L.Z.); (G.M.); (C.C.); (A.A.); (F.M.)
| | - Mayra Paolillo
- Department of Drug Science, University of Pavia, 27100 Pavia, Italy;
| | - Sergio Comincini
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy; (F.C.); (C.M.); (F.G.); (G.B.); (L.Z.); (G.M.); (C.C.); (A.A.); (F.M.)
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Liang P, Kolodieznyi D, Creeger Y, Ballou B, Bruchez MP. Subcellular Singlet Oxygen and Cell Death: Location Matters. Front Chem 2020; 8:592941. [PMID: 33282833 PMCID: PMC7705227 DOI: 10.3389/fchem.2020.592941] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 10/12/2020] [Indexed: 12/16/2022] Open
Abstract
We developed a tool for targeted generation of singlet oxygen using light activation of a genetically encoded fluorogen-activating protein complexed with a unique dye molecule that becomes a potent photosensitizer upon interaction with the protein. By targeting the protein receptor to activate this dye in distinct subcellular locations at consistent per-cell concentrations, we investigated the impact of localized production of singlet oxygen on induction of cell death. We analyzed light dose-dependent cytotoxic response and characterized the apoptotic vs. necrotic cell death as a function of subcellular location, including the nucleus, the cytosol, the endoplasmic reticulum, the mitochondria, and the membrane. We find that different subcellular origins of singlet oxygen have different potencies in cytotoxic response and the pathways of cell death, and we observed that CT26 and HEK293 cell lines are differentially sensitive to mitochondrially localized singlet oxygen stresses. This work provides new insight into the function of type II reactive oxygen generating photosensitizing processes in inducing targeted cell death and raises interesting mechanistic questions about tolerance and survival mechanisms in studies of oxidative stress in clonal cell populations.
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Affiliation(s)
- Pingping Liang
- Molecular Biosensor and Imaging Center, Carnegie Mellon University, Pittsburgh, PA, United States.,Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, United States.,Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Nanjing Tech University, Nanjing, China
| | - Dmytro Kolodieznyi
- Molecular Biosensor and Imaging Center, Carnegie Mellon University, Pittsburgh, PA, United States.,Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, United States
| | - Yehuda Creeger
- Molecular Biosensor and Imaging Center, Carnegie Mellon University, Pittsburgh, PA, United States
| | - Byron Ballou
- Molecular Biosensor and Imaging Center, Carnegie Mellon University, Pittsburgh, PA, United States
| | - Marcel P Bruchez
- Molecular Biosensor and Imaging Center, Carnegie Mellon University, Pittsburgh, PA, United States.,Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA, United States.,Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, PA, United States
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Gao H, Shi X, Chen Q, Che B, Yin H, Li Y. Deep proteome profiling of SW837 cells treated by photodynamic therapy (PDT) reveals the underlying mechanisms of metronomic and acute PDTs. Photodiagnosis Photodyn Ther 2020; 31:101809. [PMID: 32437970 DOI: 10.1016/j.pdpdt.2020.101809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/30/2020] [Accepted: 04/30/2020] [Indexed: 11/17/2022]
Abstract
AIM Metronomic photodynamic therapy (mPDT) with a longer irradiation time and lower energy compared with acute (or classic) photodynamic therapy (aPDT) is a more effective treatment than aPDT for tumor cells, especially colorectal cancer. However, the underlying mechanisms of the superior effects of mPDT are unknown. METHODS we used SWATH-MS (sequential window acquisition of all theoretical mass spectra) to identify differentially expressed proteins (DEPs) specific to aPDT (conventional fluence rate, 20 mW/cm2, 4 min 10 s), mPDT (metronomic fluence rate, 0.4 mW/cm2, 3.5 h), and control groups of SW837 cells. The photosensitizer used in both PDT methods was aminolevulinic acid which were incubated with the cells before irradiation. RESULTS A total of 6805 proteins were identified in the three groups of SW837 cells. aPDT induced 333 DEPs and mPDT induced 1716 DEPs compared with the control. We identified 185 common DEPs in the two PDT groups, 148 different DEPs in the aPDT group, and 1531 different DEPs in the mPDT group. Most of the 185 common DEPs were involved in the extracellular component, participated in the processes of vesicle transport and secretion, binding, and hydrolase/catalytic activity. They were also involved in PI3K-Akt, cGMP-PKG, RAS, and aAMP signaling pathways. In addition, the 1531 different DEPs in the mPDT group participated in similar processes and molecular functions, but in a more complex manner than those in the aPDT group. CONCLUSION our proteome data suggest that mPDT has a complex tumor destruction mechanism with more involved proteins compared with aPDT, which may explain the better tumor killing effect of mPDT.
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Affiliation(s)
- Hao Gao
- Department of Colorectal Surgery, Tianjin People's Hospital Tianjin Union Medical Center, 190 Jieyuan Road, Hongqiao District, Tianjin 300121, China
| | - Xiafei Shi
- Laboratory of Laser Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering, 236 Baidi Road, Nankai District, Tianjin 300192, China
| | - Qianqian Chen
- Laboratory of Laser Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering, 236 Baidi Road, Nankai District, Tianjin 300192, China
| | - Bochen Che
- Laboratory of Laser Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering, 236 Baidi Road, Nankai District, Tianjin 300192, China
| | - Huijuan Yin
- Laboratory of Laser Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering, 236 Baidi Road, Nankai District, Tianjin 300192, China.
| | - Yingxin Li
- Laboratory of Laser Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Biomedical Engineering, 236 Baidi Road, Nankai District, Tianjin 300192, China
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Blood Flow Measurements Enable Optimization of Light Delivery for Personalized Photodynamic Therapy. Cancers (Basel) 2020; 12:cancers12061584. [PMID: 32549354 PMCID: PMC7353010 DOI: 10.3390/cancers12061584] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/30/2020] [Accepted: 06/11/2020] [Indexed: 12/12/2022] Open
Abstract
Fluence rate is an effector of photodynamic therapy (PDT) outcome. Lower light fluence rates can conserve tumor perfusion during some illumination protocols for PDT, but then treatment times are proportionally longer to deliver equivalent fluence. Likewise, higher fluence rates can shorten treatment time but may compromise treatment efficacy by inducing blood flow stasis during illumination. We developed blood-flow-informed PDT (BFI-PDT) to balance these effects. BFI-PDT uses real-time noninvasive monitoring of tumor blood flow to inform selection of irradiance, i.e., incident fluence rate, on the treated surface. BFI-PDT thus aims to conserve tumor perfusion during PDT while minimizing treatment time. Pre-clinical studies in murine tumors of radiation-induced fibrosarcoma (RIF) and a mesothelioma cell line (AB12) show that BFI-PDT preserves tumor blood flow during illumination better than standard PDT with continuous light delivery at high irradiance. Compared to standard high irradiance PDT, BFI-PDT maintains better tumor oxygenation during illumination and increases direct tumor cell kill in a manner consistent with known oxygen dependencies in PDT-mediated cytotoxicity. BFI-PDT promotes vascular shutdown after PDT, thereby depriving remaining tumor cells of oxygen and nutrients. Collectively, these benefits of BFI-PDT produce a significantly better therapeutic outcome than standard high irradiance PDT. Moreover, BFI-PDT requires ~40% less time on average to achieve outcomes that are modestly better than those with standard low irradiance treatment. This contribution introduces BFI-PDT as a platform for personalized light delivery in PDT, documents the design of a clinically-relevant instrument, and establishes the benefits of BFI-PDT with respect to treatment outcome and duration.
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Kim D, Lee MH, Koo MA, Kwon BJ, Kim MS, Seon GM, Hong SH, Park JC. Suppression of T24 human bladder cancer cells by ROS from locally delivered hematoporphyrin-containing polyurethane films. Photochem Photobiol Sci 2018; 17:763-772. [PMID: 29717739 DOI: 10.1039/c7pp00424a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Systemic injection of a photosensitizer is a general method in photodynamic therapy, but it has complications due to the unintended systemic distribution and remnants of photosensitizers. This study focused on the possibility of suppressing luminal proliferative cells by excessive reactive oxygen species from locally delivered photosensitizer with biocompatible polyurethane, instead of the systemic injection method. We used human bladder cancer cells, hematoporphyrin as the photosensitizer, and polyurethane film as the photosensitizer-delivering container. The light source was a self-made LED (510 nm, 5 mW cm-2) system. The cancer cells were cultured on different doses of hematoporphyrin-containing polyurethane film and irradiated with LED for 15 minutes and 30 minutes each. After irradiating with LED and incubating for 24 hours, cell viability analysis, cell cycle analysis, apoptosis assay, intracellular and extracellular ROS generation study and western blot were performed. The cancer cell suppression effects of different concentrations of the locally delivered hematoporphyrin with PDT were compared. Apoptosis dominant cancer cell suppressions were shown to be hematoporphyrin dose-dependent. However, after irradiation, intracellular ROS amounts were similar in all the groups having different doses of hematoporphyrin, but these values were definitely higher than those in the control group. Excessive extracellular ROS from the intended, locally delivered photosensitizer for photodynamic treatment application had an inhibitory effect on luminal proliferative cancer cells. This method can be another possibility for PDT application on contactable or attachable lesions.
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Affiliation(s)
- Dohyun Kim
- Cellbiocontrol Laboratory, Department of Medical Engineering, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea.
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Oxidation of protein-bound methionine in Photofrin-photodynamic therapy-treated human tumor cells explored by methionine-containing peptide enrichment and quantitative proteomics approach. Sci Rep 2017; 7:1370. [PMID: 28465586 PMCID: PMC5431048 DOI: 10.1038/s41598-017-01409-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 03/28/2017] [Indexed: 11/08/2022] Open
Abstract
In Photofrin-mediated photodynamic therapy (PDT), cell fate can be modulated by the subcellular location of Photofrin. PDT triggers oxidative damage to target cells, including the methionine (Met) oxidation of proteins. Here, we developed a new Met-containing peptide enrichment protocol combined with SILAC-based quantitative proteomics, and used this approach to explore the global Met oxidation changes of proteins in PDT-treated epidermoid carcinoma A431 cells preloaded with Photofrin at the plasma membrane, ER/Golgi, or ubiquitously. We identified 431 Met-peptides corresponding to 302 proteins that underwent severe oxidation upon PDT and observed overrepresentation of proteins related to the cell surface, plasma membrane, ER, Golgi, and endosome under all three conditions. The most frequently oxidized Met-peptide sequence was "QAMXXMM-E/G/M-S/G-A/G/F-XG". We also identified several hundred potential Photofrin-binding proteins using affinity purification coupled with LC-MS/MS, and confirmed the bindings of EGFR and cathepsin D with Photofrin. The enzyme activities of both proteins were significantly reduced by Photofrin-PDT. Our results shed light on the global and site-specific changes in Met-peptide oxidation among cells undergoing Photofrin-PDT-mediated oxidative stress originating from distinct subcellular sites, and suggest numerous potential Photofrin-binding proteins. These findings provide new insight into the molecular targets through which Photofrin-PDT has diverse effects on target cells.
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8
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Dąbrowski JM. Reactive Oxygen Species in Photodynamic Therapy: Mechanisms of Their Generation and Potentiation. ADVANCES IN INORGANIC CHEMISTRY 2017. [DOI: 10.1016/bs.adioch.2017.03.002] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Luiza Andreazza N, Vevert-Bizet C, Bourg-Heckly G, Sureau F, José Salvador M, Bonneau S. Berberine as a photosensitizing agent for antitumoral photodynamic therapy: Insights into its association to low density lipoproteins. Int J Pharm 2016; 510:240-9. [DOI: 10.1016/j.ijpharm.2016.06.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 05/30/2016] [Accepted: 06/05/2016] [Indexed: 01/30/2023]
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Dąbrowski JM, Arnaut LG. Photodynamic therapy (PDT) of cancer: from local to systemic treatment. Photochem Photobiol Sci 2015. [DOI: 10.1039/c5pp00132c] [Citation(s) in RCA: 295] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Photodynamic therapy (PDT) requires a medical device, a photosensitizing drug and adequate use of both to trigger biological mechanisms that can rapidly destroy the primary tumour and provide long-lasting protection against metastasis.
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Affiliation(s)
| | - Luis G. Arnaut
- Chemistry Department
- University of Coimbra
- 3004-535 Coimbra
- Portugal
- Luzitin SA
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Arnaut LG, Pereira MM, Dąbrowski JM, Silva EFF, Schaberle FA, Abreu AR, Rocha LB, Barsan MM, Urbańska K, Stochel G, Brett CMA. Photodynamic Therapy Efficacy Enhanced by Dynamics: The Role of Charge Transfer and Photostability in the Selection of Photosensitizers. Chemistry 2014; 20:5346-57. [DOI: 10.1002/chem.201304202] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Indexed: 01/09/2023]
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12
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Abstract
Theories of radiationless conversions and of chemical processes were employed to
design better photosensitizers for photodynamic therapy (PDT). In addition to
photostability and intense absorption in the near infrared, these
photosensitizers were required to generate high yields of long-lived triplet
states that could efficiently transfer their energy, or an electron, to
molecular oxygen. The guidance provided by the theories was combined with the
ability to synthesize large quantities of pure photosensitizers and with the
biological screening of graded hydrophilicities/lipophilicities. The theoretical
prediction that halogenated sulfonamide tetraphenylbacteriochlorins could
satisfy all the criteria for ideal PDT photosensitizers was verified
experimentally.
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Photofrin binds to procaspase-3 and mediates photodynamic treatment-triggered methionine oxidation and inactivation of procaspase-3. Cell Death Dis 2012; 3:e347. [PMID: 22785533 PMCID: PMC3406584 DOI: 10.1038/cddis.2012.85] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Diverse death phenotypes of cancer cells can be induced by Photofrin-mediated photodynamic therapy (PDT), which has a decisive role in eliciting a tumor-specific immunity for long-term tumor control. However, the mechanism(s) underlying this diversity remain elusive. Caspase-3 is a critical factor in determining cell death phenotypes in many physiological settings. Here, we report that Photofrin-PDT can modify and inactivate procaspase-3 in cancer cells. In cells exposed to an external apoptotic trigger, high-dose Photofrin-PDT pretreatment blocked the proteolytic activation of procaspase-3 by its upstream caspase. We generated and purified recombinant procaspase-3-D3A (a mutant without autolysis/autoactivation activity) to explore the underlying mechanism(s). Photofrin could bind directly to procaspase-3-D3A, and Photofrin-PDT-triggered inactivation and modification of procaspase-3-D3A was seen in vitro. Mass spectrometry-based quantitative analysis for post-translational modifications using both 16O/18O- and 14N/15N-labeling strategies revealed that Photofrin-PDT triggered a significant oxidation of procaspase-3-D3A (mainly on Met-27, -39 and -44) in a Photofrin dose-dependent manner, whereas the active site Cys-163 remained largely unmodified. Site-directed mutagenesis experiments further showed that Met-44 has an important role in procaspase-3 activation. Collectively, our results reveal that Met oxidation is a novel mechanism for the Photofrin-PDT-mediated inactivation of procaspase-3, potentially explaining at least some of the complicated cell death phenotypes triggered by PDT.
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Yang PW, Hung MC, Hsieh CY, Tung EC, Wang YH, Tsai JC, Lee JM. The effects of Photofrin-mediated photodynamic therapy on the modulation of EGFR in esophageal squamous cell carcinoma cells. Lasers Med Sci 2012; 28:605-14. [DOI: 10.1007/s10103-012-1119-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 05/03/2012] [Indexed: 12/31/2022]
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15
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Dąbrowski JM, Arnaut LG, Pereira MM, Urbańska K, Simões S, Stochel G, Cortes L. Combined effects of singlet oxygen and hydroxyl radical in photodynamic therapy with photostable bacteriochlorins: evidence from intracellular fluorescence and increased photodynamic efficacy in vitro. Free Radic Biol Med 2012; 52:1188-200. [PMID: 22285766 DOI: 10.1016/j.freeradbiomed.2011.12.027] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 12/22/2011] [Accepted: 12/28/2011] [Indexed: 01/08/2023]
Abstract
Sulfonamides of halogenated bacteriochlorins bearing Cl or F substituents in the ortho positions of the phenyl rings have adequate properties for photodynamic therapy, including strong absorption in the near-infrared (λ(max) ≈ 750 nm, ε ≈ 10(5) M(-1) cm(-1)), controlled photodecomposition, large cellular uptake, intracellular localization in the endoplasmic reticulum, low cytotoxicity, and high phototoxicity against A549 and S91 cells. The roles of type I and type II photochemical processes are assessed by singlet oxygen luminescence and intracellular hydroxyl radical detection. Phototoxicity of halogenated sulfonamide bacteriochlorins does not correlate with singlet oxygen quantum yields and must be mediated both by electron transfer (superoxide ion, hydroxyl radicals) and by energy transfer (singlet oxygen). The photodynamic efficacy is enhanced when cellular death is induced by both singlet oxygen and hydroxyl radicals.
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