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Boidin L, Moinard M, Moussaron A, Merlier M, Moralès O, Grolez GP, Baydoun M, Mohd-Gazzali A, Tazizi MHDM, Allah HHA, Kerbage Y, Arnoux P, Acherar S, Frochot C, Delhem N. Targeted Photodynamic Therapy using a Vectorized Photosensitizer coupled to Folic Acid Analog induces Ovarian Tumor Cell Death and inhibits IL-6-mediated Inflammation. J Control Release 2024; 371:351-370. [PMID: 38789088 DOI: 10.1016/j.jconrel.2024.05.033] [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: 12/15/2023] [Revised: 05/10/2024] [Accepted: 05/19/2024] [Indexed: 05/26/2024]
Abstract
Ovarian cancer (OC) is one of the most lethal cancers among women. Frequent recurrence in the peritoneum due to the presence of microscopic tumor residues justifies the development of new therapies. Indeed, our main objective is to develop a targeted photodynamic therapy (PDT) treatment of peritoneal carcinomatosis from OC to improve the life expectancy of cancer patients. Herein, we propose a targeted-PDT using a vectorized photosensitizer (PS) coupled with a newly folic acid analog (FAA), named PSFAA, in order to target folate receptor alpha (FRα) overexpressed on peritoneal metastasis. This PSFAA was the result of the coupling of pyropheophorbide-a (Pyro-a), as the PS, to a newly synthesized FAA via a polyethylene glycol (PEG) spacer. The selectivity and the PDT efficacy of PSFAA was evaluated on two human OC cell lines overexpressing FRα compared to fibrosarcoma cells underexpressing FRα. Final PSFAA, including the synthesis of a newly FAA and its conjugation to Pyro-a, was obtained after 10 synthesis steps, with an overall yield of 19%. Photophysical properties of PSFAA in EtOH were performed and showed similarity with those of free Pyro-a, such as the fluorescence and singlet oxygen quantum yields (Φf = 0.39 and ΦΔ = 0.53 for free Pyro-a, and Φf = 0.26 and ΦΔ = 0.41 for PSFAA). Any toxicity of PSFAA was noticed. After light illumination, a dose-dependent effect on PS concentration and light dose was shown. Furthermore, a PDT efficacy of PSFAA on OC cell secretome was detected inducing a decrease of a pro-inflammatory cytokine secretion (IL-6). This new PSFAA has shown promising biological properties highlighting the selectivity of the therapy opening new perspectives in the treatment of a cancer in a therapeutic impasse.
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Affiliation(s)
- Léa Boidin
- Univ. Lille, Inserm, CHU Lille, U1189-ONCOTHAI-Assisted Laser Therapy and Immunotherapy for Oncology, Lille F-59000, France
| | - Morgane Moinard
- Univ. Lorraine, CNRS, UMR7274 - LRGP- Laboratoire des Réactions et Génie des Procédés, Nancy F-54000, France
| | - Albert Moussaron
- Univ. Lorraine, CNRS, UMR7274 - LRGP- Laboratoire des Réactions et Génie des Procédés, Nancy F-54000, France; Univ. Lorraine, CNRS, UMR7375 - LCPM - Laboratoire de Chimie-Physique Macromoléculaire, Nancy F-54000, France
| | - Margaux Merlier
- Univ. Lille, Inserm, CHU Lille, U1189-ONCOTHAI-Assisted Laser Therapy and Immunotherapy for Oncology, Lille F-59000, France
| | - Olivier Moralès
- Univ. Lille, Inserm, CHU Lille, U1189-ONCOTHAI-Assisted Laser Therapy and Immunotherapy for Oncology, Lille F-59000, France; Univ. Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277 - CANTHER - Cancer Heterogeneity Plasticity and Resistance to Therapies, Lille F-59000, France
| | - Guillaume Paul Grolez
- Univ. Lille, Inserm, CHU Lille, U1189-ONCOTHAI-Assisted Laser Therapy and Immunotherapy for Oncology, Lille F-59000, France
| | - Martha Baydoun
- Univ. Lille, Inserm, CHU Lille, U1189-ONCOTHAI-Assisted Laser Therapy and Immunotherapy for Oncology, Lille F-59000, France
| | - Amirah Mohd-Gazzali
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia
| | | | - Hassan Hadi Abd Allah
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia
| | - Yohan Kerbage
- Univ. Lille, Inserm, CHU Lille, U1189-ONCOTHAI-Assisted Laser Therapy and Immunotherapy for Oncology, Lille F-59000, France
| | - Philippe Arnoux
- Univ. Lorraine, CNRS, UMR7274 - LRGP- Laboratoire des Réactions et Génie des Procédés, Nancy F-54000, France
| | - Samir Acherar
- Univ. Lorraine, CNRS, UMR7375 - LCPM - Laboratoire de Chimie-Physique Macromoléculaire, Nancy F-54000, France.
| | - Céline Frochot
- Univ. Lorraine, CNRS, UMR7274 - LRGP- Laboratoire des Réactions et Génie des Procédés, Nancy F-54000, France.
| | - Nadira Delhem
- Univ. Lille, Inserm, CHU Lille, U1189-ONCOTHAI-Assisted Laser Therapy and Immunotherapy for Oncology, Lille F-59000, France.
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Rocha LB, Soares HT, Mendes MIP, Cabrita A, Schaberle FA, Arnaut LG. Necrosis Depth and Photodynamic Threshold Dose with Redaporfin-PDT. Photochem Photobiol 2020; 96:692-698. [PMID: 32125692 DOI: 10.1111/php.13256] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Accepted: 01/23/2020] [Indexed: 12/24/2022]
Abstract
Predicting the extent of necrosis in photodynamic therapy (PDT) is critical to ensure that the whole tumor is treated but vital structures, such as major blood vessels in the vicinity of the tumor, are spared. The models developed for clinical planning rely on empirical parameters that change with the nature of the photosensitizer and the target tissue. This work presents an in vivo study of the necrosis in the livers of rats due to PDT with a bacteriochlorin photosensitizer named redaporfin using both frontal illumination and interstitial illumination. Various doses of light at 750 nm were delivered 15 min postintravenous administration of redaporfin. Sharp boundaries between necrotic and healthy tissues were found. Frontal illumination allowed for the determination of the photodynamic threshold dose-1.5 × 1019 photons cm-3 -which means that the regions of the tissues exposed to more than 11 mm of ROS evolved to necrosis. Interstitial illumination produced a necrotic radius of 0.7 cm for a light dose of 100 J cm-1 and a redaporfin dose of 0.75 mg kg-1 . The experimental data obtained can be used to inform and improve clinical planning with frontal and interstitial illumination protocols.
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Affiliation(s)
- Luis B Rocha
- Chemistry Department, University of Coimbra, Coimbra, Portugal
| | - Helder T Soares
- Chemistry Department, University of Coimbra, Coimbra, Portugal
| | | | - António Cabrita
- Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | | | - Luís G Arnaut
- Chemistry Department, University of Coimbra, Coimbra, Portugal
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3
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Effect of linker length on the spectroscopic properties of bacteriochlorin – 1,8-naphthalimide conjugates for fluorescence-guided photodynamic therapy. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112338] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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4
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Mamardashvili GM, Lazovskiy DA, Maltceva OV, Zh. Mamardashvili N, Koifman OI. The Sn(IV)-tetra(4-sulfonatophenyl) porphyrin complexes with antioxidants: Synthesis, structure, properties. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.11.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Stringasci MD, Fortunato TC, Moriyama LT, Filho JDV, Bagnato VS, Kurachi C. Interstitial PDT using diffuser fiber-investigation in phantom and in vivo models. Lasers Med Sci 2017; 32:1009-1016. [PMID: 28474212 DOI: 10.1007/s10103-017-2225-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 04/27/2017] [Indexed: 11/30/2022]
Abstract
Photodynamic therapy (PDT) has been used for local treatment of several types of tumors. Light penetration of biological tissue is one limiting factor in PDT, decreasing the success rates of the treatment of invasive and solid tumors. In those cases, a possible solution is to use interstitial PDT, in which both diffuser optical fibers are inserted into the tumor. The uniformity of the diffuser emission plays a crucial role in planning the delivery of the appropriate light fluence and in ensuring treatment success. In this study, we characterized a diffuser optical fiber concerning its homogeneity. We showed that the diffuser emission can be inhomogeneous and that the necrosis generated by interstitial PDT using such a diffuser for illumination is asymmetrical in volume as a result. This observation has relevant consequences in achieving success in PDT and phototherapies in general, as the delivered light fluence depends on adequate previous knowledge of the irradiation profile.
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Affiliation(s)
- Mirian D Stringasci
- Sao Carlos Institute of Physics, University of São Paulo, Trabalhador Sao-Carlense Street, Number 400, São Carlos, São Paulo, CEP: 13566-590, Brazil.
| | - Thereza C Fortunato
- Sao Carlos Institute of Physics, University of São Paulo, Trabalhador Sao-Carlense Street, Number 400, São Carlos, São Paulo, CEP: 13566-590, Brazil
| | - Lilian T Moriyama
- Sao Carlos Institute of Physics, University of São Paulo, Trabalhador Sao-Carlense Street, Number 400, São Carlos, São Paulo, CEP: 13566-590, Brazil
| | - José Dirceu Vollet Filho
- Sao Carlos Institute of Physics, University of São Paulo, Trabalhador Sao-Carlense Street, Number 400, São Carlos, São Paulo, CEP: 13566-590, Brazil
| | - Vanderlei S Bagnato
- Sao Carlos Institute of Physics, University of São Paulo, Trabalhador Sao-Carlense Street, Number 400, São Carlos, São Paulo, CEP: 13566-590, Brazil
| | - Cristina Kurachi
- Sao Carlos Institute of Physics, University of São Paulo, Trabalhador Sao-Carlense Street, Number 400, São Carlos, São Paulo, CEP: 13566-590, Brazil
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6
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Jin WW, Wang Y, Wang A, Zhou L, Lin Y, Wei SH. Influence of N atom number and form on the photodynamic activities of zinc phthalocyanines. J PORPHYR PHTHALOCYA 2016. [DOI: 10.1142/s1088424616500413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Amino group modified phthalocyanines (Pcs) and their derivatives have attracted great attention in the field of photodynamic therapy (PDT) because of their satisfied anticancer activity. The existence of N atoms in these Pcs is very important because they not only provide water solubility of Pcs, but also greatly affect their PDT activity. To clear the influence of N atoms number on PDT activity of amino group modified Pcs and their derivatives, in this manuscript, two series of amine modified Pcs with different N atom number and their water soluble derivatives, hydrochloride and quaternizing derivatives were synthesized. Their photochemical and photobiology properties were studied and compared. The results indicated that with increasing the number on N atom, the reactive oxygen species (ROSs) generation ability, cancer cell uptaken ability and photoinduced anticancer activity were all increased in these ZnPcs.
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Affiliation(s)
- Wei W. Jin
- College of Chemistry and Materials Science, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Wenyuan Road No. 1, Nanjing 210023, China
| | - Yue Wang
- College of Chemistry and Materials Science, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Wenyuan Road No. 1, Nanjing 210023, China
| | - Ao Wang
- College of Chemistry and Materials Science, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Wenyuan Road No. 1, Nanjing 210023, China
| | - Lin Zhou
- College of Chemistry and Materials Science, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Wenyuan Road No. 1, Nanjing 210023, China
| | - Yun Lin
- College of Chemistry and Materials Science, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Wenyuan Road No. 1, Nanjing 210023, China
| | - Shao H. Wei
- College of Chemistry and Materials Science, Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Wenyuan Road No. 1, Nanjing 210023, China
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7
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Panchenko PA, Sergeeva AN, Fedorova OA, Fedorov YV, Reshetnikov RI, Schelkunova AE, Grin MA, Mironov AF, Jonusauskas G. Spectroscopical study of bacteriopurpurinimide–naphthalimide conjugates for fluorescent diagnostics and photodynamic therapy. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 133:140-4. [DOI: 10.1016/j.jphotobiol.2014.03.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 03/13/2014] [Accepted: 03/15/2014] [Indexed: 10/25/2022]
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8
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Joshi P, Ethirajan M, Goswami LN, Srivatsan A, Missert JR, Pandey RK. Synthesis, spectroscopic, and in vitro photosensitizing efficacy of ketobacteriochlorins derived from ring-B and ring-D reduced chlorins via pinacol-pinacolone rearrangement. J Org Chem 2011; 76:8629-40. [PMID: 21955163 DOI: 10.1021/jo201688c] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this report, we present a regioselective oxidation of a series bacteriochlorins, which on reacting with either ferric chloride (FeCl(3)) or 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) yielded the corresponding ring-B or ring-D reduced chlorins. The effect of the number of electron-withdrawing groups present at the peripheral position, with or without a fused isocyclic ring (ring-E), did not make any significant difference in regioselective oxidation of the pyrrole rings. However, depending on the nature of substituents, the intermediate bis-dihydroxy bacteriochlorins on subjecting to pinacol-pinacolone reaction conditions gave various ketochlorins. The introduction of the keto-group at a particular position in the molecule possibly depends on the stability of the intermediate carbocation species. The newly synthesized bacteriochlorins show strong long-wavelength absorption and produced significant in vitro (Colon26 cells) photosensitizing ability. Among the compounds tested, the bacteriochlorins containing a keto-group at position 7 of ring-B with cleaved five-member isocyclic ring showed the best efficacy.
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Affiliation(s)
- Penny Joshi
- Chemistry Division, PDT Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, New York 14263, United States
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9
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Senge MO, Brandt JC. Temoporfin (Foscan®, 5,10,15,20-tetra(m-hydroxyphenyl)chlorin)--a second-generation photosensitizer. Photochem Photobiol 2011; 87:1240-96. [PMID: 21848905 DOI: 10.1111/j.1751-1097.2011.00986.x] [Citation(s) in RCA: 224] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review traces the development and study of the second-generation photosensitizer 5,10,15,20-tetra(m-hydroxyphenyl)chlorin through to its acceptance and clinical use in modern photodynamic (cancer) therapy. The literature has been covered up to early 2011.
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Affiliation(s)
- Mathias O Senge
- Medicinal Chemistry, Institute of Molecular Medicine, Trinity Centre for Health Sciences, Trinity College Dublin, St. James's Hospital, Dublin 8, Ireland.
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10
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Ethirajan M, Chen Y, Joshi P, Pandey RK. The role of porphyrin chemistry in tumor imaging and photodynamic therapy. Chem Soc Rev 2010; 40:340-62. [PMID: 20694259 DOI: 10.1039/b915149b] [Citation(s) in RCA: 1441] [Impact Index Per Article: 102.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In recent years several review articles and books have been published on the use of porphyrin-based compounds in photodynamic therapy (PDT). This critical review is focused on (i) the basic concept of PDT, (ii) advantages of long-wavelength absorbing photosensitizers (PS), (iii) a brief discussion on recent advances in developing PDT agents, and (iv) the various synthetic strategies designed at the Roswell Park Cancer Institute, Buffalo, for developing highly effective long-wavelength PDT agents and their utility in constructing the conjugates with tumor-imaging and therapeutic potential (Theranostics). The clinical status of certain selected PDT agents is also summarized (205 references).
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Affiliation(s)
- Manivannan Ethirajan
- PDT Center, Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
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11
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New treatments for localized prostate cancer. Urology 2009; 72:S36-43. [PMID: 19095127 DOI: 10.1016/j.urology.2008.08.506] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2008] [Revised: 08/12/2008] [Accepted: 08/15/2008] [Indexed: 11/21/2022]
Abstract
Interest in focal therapy for prostate cancer has recently been renewed owing to downward stage migration, improved biopsy and imaging techniques, and the prevalence of either unifocal cancer or a dominant cancer with secondary tumors of minimal malignant potential. Several techniques have potential for focal ablation of prostate cancer. Cryotherapy has been used for some time as primary therapy for complete ablation of the prostate or local recurrence after radiotherapy. Enthusiasm for cryotherapy as the primary therapy has been tempered by the uncertainty about complete ablation of the cancer, the frequent persistence of measurable prostate-specific antigen levels after the procedure, and a high rate of erectile dysfunction. Studies have reported "focal ablation" of prostate cancer with cryotherapy, targeting 1 side of the gland to eliminate a cancer confined to that side with less risk of urinary or sexual complications. Whether cryotherapy has sufficient power to eradicate focal cancer and can be targeted with sufficient accuracy to avoid damage to surrounding structures remains to be demonstrated in prospective clinical trials. High-intensity focused ultrasound (HIFU) has been used widely in Europe for complete ablation of the prostate, especially in elderly men who are unwilling or unable to undergo radical therapy. For low- or intermediate-risk cancer, the short- and intermediate-term oncologic results have been acceptable but need confirmation in prospective multicenter trials presently underway. Whole gland therapy with transrectal ultrasound guidance has been associated with a high risk of acute urinary symptoms, often requiring transurethral resection before or after HIFU. Adverse effects on erectile function seem likely after a therapy that depends on heat to eradicate the cancer, but erectile function after HIFU has not been adequately documented with patient-reported questionnaires. HIFU holds promise for focal ablation of prostate cancer. As with cryotherapy, focal HIFU should reduce the adverse sexual, urinary, and bowel effects of whole gland ablation. New techniques are being developed to allow HIFU treatment under real-time guidance using magnetic resonance imaging, which could improve the precision and reduce the adverse effects further. Another promising technique, currently in clinical trials, is vascular-targeted photodynamic therapy, which has been used for whole gland ablation of locally recurrent cancer after radiotherapy and, more recently, for focal ablation of previously untreated cancer. In combination with a new, systemically administered photodynamic agent, laser light is delivered through fibers introduced into the prostate under ultrasound guidance. This technique does not heat the prostate but destroys the endothelial cells and cancer by activating the photodynamic agent. Damage to surrounding structures appears to be limited and can be controlled by the duration and intensity of the light. We have reviewed the principles of focal therapy and these new therapeutic modalities.
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Huang Z, Xu H, Meyers AD, Musani AI, Wang L, Tagg R, Barqawi AB, Chen YK. Photodynamic therapy for treatment of solid tumors--potential and technical challenges. Technol Cancer Res Treat 2008; 7:309-20. [PMID: 18642969 DOI: 10.1177/153303460800700405] [Citation(s) in RCA: 222] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Photodynamic therapy (PDT) involves the administration of photosensitizer followed by local illumination with visible light of specific wavelength(s). In the presence of oxygen molecules, the light illumination of photosensitizer can lead to a series of photochemical reactions and consequently the generation of cytotoxic species. The quantity and location of PDT-induced cytotoxic species determine the nature and consequence of PDT. Much progress has been seen in both basic research and clinical application in recent years. Although the majority of approved PDT clinical protocols have primarily been used for the treatment of superficial lesions of both malignant and non-malignant diseases, interstitial PDT for the ablation of deep-seated solid tumors are now being investigated worldwide. The complexity of the geometry and non-homogeneity of solid tumor pose a great challenge on the implementation of minimally invasive interstitial PDT and the estimation of PDT dosimetry. This review will discuss the recent progress and technical challenges of various forms of interstitial PDT for the treatment of parenchymal and/or stromal tissues of solid tumors.
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Affiliation(s)
- Zheng Huang
- University of Colorado Denver, Aurora Campus, CO, USA.
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13
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Rendon A, Beck JC, Lilge L. Treatment planning using tailored and standard cylindrical light diffusers for photodynamic therapy of the prostate. Phys Med Biol 2008; 53:1131-49. [PMID: 18263963 DOI: 10.1088/0031-9155/53/4/021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Interstitial photodynamic therapy (PDT) has seen a rebirth, partially prompted by the development of photosensitizers with longer absorption wavelengths that enable the treatment of larger tissue volumes. Here, we study whether using diffusers with customizable longitudinal emission profiles, rather than conventional ones with flat emission profiles, improves our ability to conform the light dose to the prostate. We present a modified Cimmino linear feasibility algorithm to solve the treatment planning problem, which improves upon previous algorithms by (1) correctly minimizing the cost function that penalizes deviations from the prescribed light dose, and (2) regularizing the inverse problem. Based on this algorithm, treatment plans were obtained under a variety of light delivery scenarios using 5-15 standard or tailored diffusers. The sensitivity of the resulting light dose distributions to uncertainties in the optical properties, and the placement of diffusers was also studied. We find that tailored diffusers only marginally outperform conventional ones in terms of prostate coverage and rectal sparing. Furthermore, it is shown that small perturbations in optical properties can lead to large changes in the light dose distribution, but that those changes can be largely corrected with a simple light dose re-normalization. Finally, we find that prostate coverage is only minimally affected by small changes in diffuser placement. Our results suggest that prostate PDT is not likely to benefit from the use of tailored diffusers. Other locations with more complex geometries might see a better improvement.
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Affiliation(s)
- Augusto Rendon
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
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Huang Z, Haider MA, Kraft S, Chen Q, Blanc D, Wilson BC, Hetzel FW. Magnetic resonance imaging correlated with the histopathological effect of Pd-bacteriopheophorbide (Tookad) photodynamic therapy on the normal canine prostate gland. Lasers Surg Med 2006; 38:672-81. [PMID: 16799982 PMCID: PMC1850616 DOI: 10.1002/lsm.20375] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND OBJECTIVE To determine the optimal magnetic resonance imaging (MRI) methodology to assess photodynamic therapy (PDT)-induced histopathological responses in the prostate. STUDY DESIGN/MATERIALS AND METHODS Laparotomy was performed in five healthy dogs. Cylindrical diffuser was placed in the prostates to deliver light of 50-300 J/cm at 150 mW/cm and 763 nm to activate IV-injected Tookad (1 mg/kg b.w.). Fast spin echo (FSE) T2-weighted, post-contrast-enhanced T1-(CE-T1) and diffusion weighted images (DWI) were obtained pre- and 2 days, 7 days, and 1 month post-PDT. Radiological-histopathological correlation was performed at 7 days (n = 4) and 1 month (n = 1) after PDT. A qualitative assessment of signal changes and apparent diffusion coefficient (ADC) mapping was performed. RESULTS At 2 or 7 days post-PDT, there was good spatial correlation between PDT-induced hemorrhagic necrosis and unenhanced regions on CE-T1 images. There was a rapidly and persistently enhancing rim corresponding to edema and inflammation. FSE T2 and DWI showed altered signal but did not clearly define necrosis in all cases. At 1 month, it was hard to correlate MR images to histopathologic changes as they represented a mixture of necrosis and developing fibrosis, which led to a mixed signal intensity and less demarcated contrast enhancement. CONCLUSIONS At 7 days after PDT, gadolinium DTPA contrast-enhanced MRI is superior to DWI and T2 imaging in assessing the boundary of Tookad PDT-induced tissue necrosis in the normal canine prostate.
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Affiliation(s)
- Zheng Huang
- Radiation Oncology Department, University of Colorado at Denver and Health Sciences Center, Aurora, Colorado 80045, USA.
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15
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Photodynamic therapy for malignant and non-malignant diseases: clinical investigation and application. Chin Med J (Engl) 2006. [DOI: 10.1097/00029330-200605020-00009] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Pinthus JH, Bogaards A, Weersink R, Wilson BC, Trachtenberg J. Photodynamic Therapy for Urological Malignancies: Past to Current Approaches. J Urol 2006; 175:1201-7. [PMID: 16515960 DOI: 10.1016/s0022-5347(05)00701-9] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2004] [Indexed: 10/25/2022]
Abstract
PURPOSE Modern PDT for urological tumors is a potentially selective approach in which in situ photosensitization by a nontoxic drug, locally activated by light, generates cytotoxic reactive oxygen species, causing cell death. While urological clinical experience with PDT is largely limited to treatment for superficial bladder cancer, the advent of novel photosensitizers and technologies for treatment planning, light delivery and dosimetry, PDT for prostate and other urological cancers appears increasingly realistic. MATERIALS AND METHODS We reviewed the current literature on PDT for urological tumors, in addition to recent emerging data from our laboratory and elsewhere. RESULTS Remarkable progress has been made in the field of photochemistry and photobiology. Together with improved optical delivery and imaging systems PDT holds promise as an alternative, minimally invasive and potentially curative treatment for localized solid tumors as well as for palliative treatment for isolated, clinically problematic metastases. CONCLUSIONS Current experience with photodynamic therapy using contemporary photosensitizing agents and light sources is mainly restricted to in vivo experimental models and early phase clinical trails. However, ongoing preclinical work and clinical trials indicate that safer and effective PDT treatments in uro-oncology are imminent.
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Affiliation(s)
- Jehonathan H Pinthus
- Prostate Cancer Center, University Health Network and Department of Medical Biophysics, Ontario Cancer Institute, University of Toronto, Toronto, Ontario, Canada
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Weersink RA, Bogaards A, Gertner M, Davidson SRH, Zhang K, Netchev G, Trachtenberg J, Wilson BC. Techniques for delivery and monitoring of TOOKAD (WST09)-mediated photodynamic therapy of the prostate: Clinical experience and practicalities. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2005; 79:211-22. [PMID: 15896648 DOI: 10.1016/j.jphotobiol.2005.01.008] [Citation(s) in RCA: 123] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2004] [Revised: 01/10/2005] [Accepted: 01/12/2005] [Indexed: 10/25/2022]
Abstract
Photodynamic therapy of solid organs requires sufficient PDT dose throughout the target tissue while minimizing the dose to proximal normal structures. This requires treatment planning for position and power of the multiple delivery channels, complemented by on-line monitoring during treatment of light delivery, drug concentration and oxygen levels. We describe our experience in implementing this approach in Phase I/II clinical trials of the Pd-bacteriophephorbide photosensitizer TOOKAD (WST09)-mediated PDT of recurrent prostate cancer following radiation failure. We present several techniques for delivery and monitoring of photodynamic therapy, including beam splitters for light delivery to multiple delivery fibers, multi-channel light dosimetry devices for monitoring the fluence rate in the prostate and surrounding organs, methods of measuring the tissue optical properties in situ, and optical spectroscopy for monitoring drug pharmacokinetics of TOOKAD in whole blood samples and in situ in the prostate. Since TOOKAD is a vascular-targeted agent, the design and implementation of the techniques are different than for cellular-targeted agents. Further development of these delivery and monitoring techniques will permit full on-line monitoring of the treatment that will enable real-time, patient-specific and optimized delivery of PDT.
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Affiliation(s)
- Robert A Weersink
- Laboratory for Applied Biophotonics, University Health Network, University Avenue, Toronto, Canada.
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Abstract
Photodynamic therapy (PDT) has received increased attention since the regulatory approvals have been granted to several photosensitizing drugs and light applicators worldwide. Much progress has been seen in basic sciences and clinical photodynamics in recent years. This review will focus on new developments of clinical investigation and discuss the usefulness of various forms of PDT techniques for curative or palliative treatment of malignant and non-malignant diseases.
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Affiliation(s)
- Z Huang
- HealthONE Alliance, 899 Logan Street, Suite 203, Denver, CO 80203, USA.
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