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Ma CH, Yang J, Mueller JL, Huang HC. Intratumoral Photosensitizer Delivery and Photodynamic Therapy. ACTA ACUST UNITED AC 2021; 11. [PMID: 34484435 DOI: 10.1142/s179398442130003x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Photodynamic therapy (PDT) is a two-step procedure that involves the administration of special drugs, commonly called photosensitizers, followed by the application of certain wavelengths of light. The light activates these photosensitizers to produce reactive molecular species that induce cell death in tissues. There are numerous factors to consider when selecting the appropriate photosensitizer administration route, such as which part of the body is being targeted, the pharmacokinetics of photosensitizers, and the formulation of photosensitizers. While intravenous, topical, and oral administration of photosensitizers are widely used in preclinical and clinical applications of PDT, other administration routes, such as intraperitoneal, intra-arterial, and intratumoral injections, are gaining traction for their potential in treating advanced diseases and reducing off-target toxicities. With recent advances in targeted nanotechnology, biomaterials, and light delivery systems, the exciting possibilities of targeted photosensitizer delivery can be fully realized for preclinical and clinical applications. Further, in light of the growing burden of cancer mortality in low and middle-income countries and development of low-cost light sources and photosensitizers, PDT could be used to treat cancer patients in low-income settings. This short article introduces aspects of interfaces of intratumoral photosensitizer injections and nano-biomaterials for PDT applications in both high-income and low-income settings but does not present a comprehensive review due to space limitations.
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Affiliation(s)
- Chen-Hua Ma
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Jeffrey Yang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Jenna L Mueller
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA.,Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Huang-Chiao Huang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA.,Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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2
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Kantor T, Wakeam E. Landmark Trials in the Surgical Management of Mesothelioma. Ann Surg Oncol 2021; 28:2037-2047. [PMID: 33521898 DOI: 10.1245/s10434-021-09589-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 12/31/2020] [Indexed: 12/12/2022]
Abstract
The treatment of mesothelioma has evolved slowly over the last 20 years. While surgery as a standalone treatment has fallen out of favor, the importance of multimodality treatment consisting of combinations of chemotherapy, radiotherapy, and surgery have become more common in operable, fit patients. In this review, we discuss trials in surgery, chemotherapy, and radiation that have shaped contemporary multimodality treatment of this difficult malignancy, and we touch on the new and emerging immunotherapeutic and targeted agents that may change the future treatment of this disease. We also review the multimodality treatment regimens, with particular attention to trimodality therapy and neoadjuvant hemithoracic radiation strategies.
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Affiliation(s)
- Taylor Kantor
- Section of Thoracic Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Elliot Wakeam
- Section of Thoracic Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI, USA.
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3
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Trempolec N, Doix B, Degavre C, Brusa D, Bouzin C, Riant O, Feron O. Photodynamic Therapy-Based Dendritic Cell Vaccination Suited to Treat Peritoneal Mesothelioma. Cancers (Basel) 2020; 12:cancers12030545. [PMID: 32120810 PMCID: PMC7139796 DOI: 10.3390/cancers12030545] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 02/21/2020] [Accepted: 02/24/2020] [Indexed: 02/06/2023] Open
Abstract
The potential of dendritic cell (DC)-based immunotherapy to treat cancer is, nowadays, well documented. Still, the clinical success of immune checkpoint inhibitors has dampened the interest in anticancer DC vaccination. For highly life-threatening tumors that are regarded as nonimmunogenic, such as mesothelioma, however, T helper 1 immunity-biased DC-based immunotherapy could still represent an attractive strategy. In this study, we took advantage of photodynamic therapy (PDT) to induce immunogenic cell death to generate mesothelioma cell lysates for DC priming and evaluated such a vaccine to treat peritoneal mesothelioma. We found that the white light in vitro activation of the photosensitizer OR141 led to mesothelioma cell death, together with the release of bona fide danger signals that promote DC maturation. The administration of a PDT-based DC vaccine to mice bearing peritoneal mesothelioma led to highly significant survival when compared with sham or control animals treated with anti-CTLA4 antibodies. This was further supported by a strong CD8+ and CD4+ T cell response, characterized by an increased proliferation, cytotoxic activities and the expression of activation markers, including interferon gamma (IFNγ). Moreover, the PDT-based DC vaccine led to a significant increase in IFNγ+ T cells infiltered within mesothelioma, as determined by flow cytometry and immunohistochemistry. Finally, in vivo tracking of intraperitoneally administered DCs led us to document rapid chemotaxis towards tumor-occupied lymphatics (vs. lipopolysaccharide (LPS)-treated DC). DCs pulsed with PDT-killed mesothelioma cells also exhibited a significant increase in CCR7 receptors, together with an intrinsic capacity to migrate towards the lymph nodes. Altogether, these results indicate that PDT-based DC vaccination is particularly suited to induce a potent immune response against peritoneal mesothelioma.
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Affiliation(s)
- Natalia Trempolec
- Pole of Pharmacology and Therapeutics (FATH), Institut de Recherche Expérimentale et Clinique (IREC), UCLouvain, 1200 Brussels, Belgium; (N.T.); (B.D.); (C.D.)
| | - Bastien Doix
- Pole of Pharmacology and Therapeutics (FATH), Institut de Recherche Expérimentale et Clinique (IREC), UCLouvain, 1200 Brussels, Belgium; (N.T.); (B.D.); (C.D.)
| | - Charline Degavre
- Pole of Pharmacology and Therapeutics (FATH), Institut de Recherche Expérimentale et Clinique (IREC), UCLouvain, 1200 Brussels, Belgium; (N.T.); (B.D.); (C.D.)
| | - Davide Brusa
- Institut de Recherche Expérimentale et Clinique (IREC) Flow Cytometry Platform, UCLouvain, 1200 Brussels, Belgium;
| | - Caroline Bouzin
- Institut de Recherche Expérimentale et Clinique (IREC) 2IP, UCLouvain, 1200 Brussels, Belgium;
| | - Olivier Riant
- Institute of Condensed Matter and Nanosciences (IMCN), Molecular Chemistry, Materials and Catalysis, UCLouvain, 1348 Louvain-la-Neuve, Belgium;
| | - Olivier Feron
- Pole of Pharmacology and Therapeutics (FATH), Institut de Recherche Expérimentale et Clinique (IREC), UCLouvain, 1200 Brussels, Belgium; (N.T.); (B.D.); (C.D.)
- Correspondence: ; Tel.: +32-2-7645264; Fax: +32-2-7645269
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Baglo Y, Liang BJ, Robey RW, Ambudkar SV, Gottesman MM, Huang HC. Porphyrin-lipid assemblies and nanovesicles overcome ABC transporter-mediated photodynamic therapy resistance in cancer cells. Cancer Lett 2019; 457:110-118. [PMID: 31071369 PMCID: PMC6690745 DOI: 10.1016/j.canlet.2019.04.037] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/17/2019] [Accepted: 04/30/2019] [Indexed: 12/22/2022]
Abstract
Photodynamic therapy (PDT) involves light activation of the photosensitizer to generate reactive molecular species that induce cell modulation or death. Based on earlier findings showing that the photosensitizer benzoporphyrin derivative (BPD) is a breast cancer resistance protein (ABCG2) substrate, we investigated the ability of the P-glycoprotein (P-gp) and multidrug resistance-associated protein 1 (MRP1) to transport BPD. In a panel of breast cancer cell lines overexpressing P-gp, MRP1, or ABCG2, BPD transport occurs only in cells overexpressing P-gp and ABCG2. Intracellular BPD fluorescence is not affected by MRP1, as determined by flow cytometry. To bypass P-gp- and ABCG2-mediated efflux of BPD, we introduce a lipidation strategy to create BPD derivatives that are no longer P-gp and ABCG2 substrates. The phospholipid-conjugated BPD and its nanoliposomal formulation evade both P-gp- and ABCG2-mediated transport. In cytotoxicity assays, lipidated BPD and its nanoliposomal formulation abrogate P-gp- and ABCG2-mediated PDT resistance. We verify that P-gp, like ABCG2, plays a role in BPD transport and BPD-PDT resistance. Furthermore, we introduce porphyrin-lipid nanovesicles as a new strategy to escape P-gp and ABCG2-mediated efflux of BPD for improved PDT outcomes in two breast cancer cell lines.
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Affiliation(s)
- Yan Baglo
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, 20742, USA
| | - Barry J Liang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, 20742, USA
| | - Robert W Robey
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Suresh V Ambudkar
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Michael M Gottesman
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Huang-Chiao Huang
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, 20742, USA; Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD, 21201, USA; Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, 02114, USA.
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Mohan A, Harris K, Bowling MR, Brown C, Hohenforst-Schmidt W. Therapeutic bronchoscopy in the era of genotype directed lung cancer management. J Thorac Dis 2018; 10:6298-6309. [PMID: 30622805 DOI: 10.21037/jtd.2018.08.14] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Lung cancer is the leading cause of cancer related deaths. Non-small cell lung cancer (NSCLC) accounts for ~85% of lung cancers. Our understanding of driver mutations and genotype directed therapy has revolutionized the management of advanced NSCLC. Commonly described mutations include mutations in epidermal growth factor (EGFR) & BRAF and translocations in anaplastic lymphoma kinase (ALK) & rat osteosarcoma (ROS1). Drugs directed against these translocations have significantly improved progression free survival individually and have shown a survival benefit when studied in the Lung Cancer Mutation Consortium (median survival 3.5 vs. 2.4 years compared to standard therapy). In a related yet parallel universe, the number of bronchoscopic ablative modalities available for management of cancer related airway obstruction have increased exponentially over the past decade. A wealth of literature has given us a better understanding of the technical aspects, benefits and risks associated with these procedures. While they all show benefits in terms of relieving airway obstruction, symptom control, quality of life and lung function testing, their complication rates vary based on the modality. The overall complication rate was ~4% in the AQuIRE registry. Bronchoscopic therapeutic modalities include rigid bronchoscopy with mechanical debulking, laser, thermo-coagulation [electrocautery & argon plasma coagulation (APC)], cryotherapy, endobronchial brachytherapy (EBT), photodynamic therapy (PDT), intratumoral chemotherapy (ITC) and transbronchial needle injection (TBNI) of chemotherapy. Intuitively, one would assume that the science of driver mutations would crisscross with the science of bronchoscopic ablation as they overlap in the same patient population. Sadly, this is not the case and there is a paucity of literature looking at these fields together. This results in several unanswered questions about the interplay between these two therapies.
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Affiliation(s)
- Arjun Mohan
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, East Carolina University-Brody School of Medicine, Greenville, North Carolina, USA
| | - Kassem Harris
- Interventional Pulmonology Section, Pulmonary Critical Care and Sleep division, Department of Medicine, Westchester Medical Center, Valhalla, New York, USA
| | - Mark R Bowling
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, East Carolina University-Brody School of Medicine, Greenville, North Carolina, USA
| | - Craig Brown
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, East Carolina University-Brody School of Medicine, Greenville, North Carolina, USA
| | - Wolfgang Hohenforst-Schmidt
- Sana Clinic Group Franken, Department of Cardiology/Pulmonology/Intensive Care/Nephrology, "Hof" Clinics, University of Erlangen, Hof, Germany
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6
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Bertoglio P, Aprile V, Ambrogi MC, Mussi A, Lucchi M. The role of intracavitary therapies in the treatment of malignant pleural mesothelioma. J Thorac Dis 2018; 10:S293-S297. [PMID: 29507798 DOI: 10.21037/jtd.2017.10.165] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Surgery is one of the steps of multimodality approach for the treatment of MPM. Due to anatomical features, microscopically radical (R0) resection is never possible and a Macroscopic Complete Resection (R1) is considered the target for mesothelioma surgeons. Recently, intracavitary therapies have been described with the aim of extending the loco-regional effect of surgery. Different agents might be administered intrapleurally: chemotherapy drugs are the most widely used, but also photodynamic therapy (PDT) showed to lead to satisfactory long-term outcomes; furthermore, immunotherapies and gene therapies have been also reported. Despite promising results, no high-quality evidences are currently available and controlled randomized trials are required to establish the exact role of intracavitary therapies and to standardize the technique.
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Affiliation(s)
- Pietro Bertoglio
- Division of Thoracic Surgery, Sacro Cuore Don Calabria Research Hospital and Cancer Care Centre, Negrar, Verona, Italy
| | - Vittorio Aprile
- Division of Thoracic Surgery, Department of Surgical, Medical and Molecular pathology and Critical Area, University Hospital of Pisa, via Paradisa 2 56100 Pisa (PI), Italy
| | - Marcello Carlo Ambrogi
- Division of Thoracic Surgery, Department of Surgical, Medical and Molecular pathology and Critical Area, University Hospital of Pisa, via Paradisa 2 56100 Pisa (PI), Italy
| | - Alfredo Mussi
- Division of Thoracic Surgery, Department of Surgical, Medical and Molecular pathology and Critical Area, University Hospital of Pisa, via Paradisa 2 56100 Pisa (PI), Italy
| | - Marco Lucchi
- Division of Thoracic Surgery, Department of Surgical, Medical and Molecular pathology and Critical Area, University Hospital of Pisa, via Paradisa 2 56100 Pisa (PI), Italy
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Chan WH, Sugarbaker DJ, Burt BM. Intraoperative adjuncts for malignant pleural mesothelioma. Transl Lung Cancer Res 2017; 6:285-294. [PMID: 28713674 DOI: 10.21037/tlcr.2017.05.04] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Malignant pleural mesothelioma (MPM) is a rapidly fatal disease. Multimodality surgically based therapies may extend survival in select patients, however, local relapse after resection is common. Novel intraoperative adjunctive therapies including heated intraoperative chemotherapy (HIOC), heated intraoperative povidone-iodine (PVP-I), and photodynamic therapy (PDT) target micrometastatic disease and aim to improve local control. This review details the most recent studies and trials of HIOC, heated intraoperative PVP-I, and PDT, this aims to provide an update on some of the most promising intraoperative adjuncts for patients with MPM.
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Affiliation(s)
- Warren Ho Chan
- Division of Thoracic Surgery, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX, USA
| | - David J Sugarbaker
- Division of Thoracic Surgery, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX, USA
| | - Bryan M Burt
- Division of Thoracic Surgery, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX, USA
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Photodynamic Therapy of Non-Small Cell Lung Cancer. Narrative Review and Future Directions. Ann Am Thorac Soc 2016; 13:265-75. [PMID: 26646726 DOI: 10.1513/annalsats.201509-650fr] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Photodynamic therapy (PDT) is an established treatment modality for non-small cell lung cancer. Phototoxicity, the primary adverse event, is expected to be minimized with the introduction of new photosensitizers that have shown promising results in phase I and II clinical studies. Early-stage and superficial endobronchial lesions less than 1 cm in thickness can be effectively treated with external light sources. Thicker lesions and peripheral lesions may be amenable to interstitial PDT, where the light is delivered intratumorally. The addition of PDT to standard-of-care surgery and chemotherapy can improve survival and outcomes in patients with pleural disease. Intraoperative PDT has shown promise in the treatment of non-small cell lung cancer with pleural spread. Recent preclinical and clinical data suggest that PDT can increase antitumor immunity. Crosslinking of signal transducer and activator of transcription-3 molecules is a reliable biomarker to quantify the photoreaction induced by PDT. Randomized studies are required to test the prognosis value of this biomarker, obtain approval for the new photosensitizers, and test the potential efficacy of interstitial and intraoperative PDT in the treatment of patients with non-small cell lung cancer.
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Current surgical strategies for malignant pleural mesothelioma. Surg Today 2015; 46:887-94. [PMID: 26590581 DOI: 10.1007/s00595-015-1275-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 09/11/2015] [Indexed: 12/27/2022]
Abstract
Malignant pleural mesothelioma (MPM) is associated with a poor prognosis. The main components of multimodality treatment include surgery, chemotherapy, and radiation therapy. Surgery remains controversial. Two procedures are currently offered: extrapleural pneumonectomy (EPP) and pleurectomy/decortication (P/D). The recent scientific literature suggests that P/D is a well-tolerated procedure, with the potential of becoming a default procedure in multimodality regimens. However, the precise treatment schemes and surgical procedures are yet to be established. In our study, we review the advantages and disadvantages of EPP and P/D, summarize the post-EPP and post-P/D observations (including mortality, morbidity, and median survival time), and discuss the choice of surgical technique (EPP vs. P/D). Moreover, we highlight the aspects of the multimodality treatments that are offered to MPM patients, including chemotherapy, radiotherapy, intensity-modulated radiation therapy, and other types of therapy.
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Bononi A, Napolitano A, Pass HI, Yang H, Carbone M. Latest developments in our understanding of the pathogenesis of mesothelioma and the design of targeted therapies. Expert Rev Respir Med 2015; 9:633-54. [PMID: 26308799 DOI: 10.1586/17476348.2015.1081066] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Malignant mesothelioma is an aggressive cancer whose pathogenesis is causally linked to occupational exposure to asbestos. Familial clusters of mesotheliomas have been observed in settings of genetic predisposition. Mesothelioma incidence is anticipated to increase worldwide in the next two decades. Novel treatments are needed, as current treatment modalities may improve the quality of life, but have shown modest effects in improving overall survival. Increasing knowledge on the molecular characteristics of mesothelioma has led to the development of novel potential therapeutic strategies, including: molecular targeted approaches, that is the inhibition of vascular endothelial growth factor with bevacizumab; immunotherapy with chimeric monoclonal antibody, immunotoxin, antibody drug conjugate, vaccine and viruses; inhibition of asbestos-induced inflammation, that is aspirin inhibition of HMGB1 activity may decrease or delay mesothelioma onset and/or growth. We elaborate on the rationale behind new therapeutic strategies, and summarize available preclinical and clinical results, as well as efforts still ongoing.
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Affiliation(s)
- Angela Bononi
- a 1 University of Hawai'i Cancer Center, University of Hawai'i at Mānoa, Honolulu, Hawai'i, USA
| | - Andrea Napolitano
- a 1 University of Hawai'i Cancer Center, University of Hawai'i at Mānoa, Honolulu, Hawai'i, USA.,b 2 Molecular Biosciences and Bioengineering, University of Hawai'i at Mānoa, Honolulu, Hawai'i, USA
| | - Harvey I Pass
- c 3 Department of Cardiothoracic Surgery, Division of Thoracic Surgery, Langone Medical Center, New York University, New York, USA
| | - Haining Yang
- a 1 University of Hawai'i Cancer Center, University of Hawai'i at Mānoa, Honolulu, Hawai'i, USA
| | - Michele Carbone
- a 1 University of Hawai'i Cancer Center, University of Hawai'i at Mānoa, Honolulu, Hawai'i, USA
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Ryu JW, Kim YS. A case of advanced malignant pleural mesothelioma treatment with chemotherapy and photodynamic therapy. Tuberc Respir Dis (Seoul) 2015; 78:36-40. [PMID: 25653696 PMCID: PMC4311034 DOI: 10.4046/trd.2015.78.1.36] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 12/17/2014] [Accepted: 12/17/2014] [Indexed: 12/29/2022] Open
Abstract
Malignant pleural mesothelioma (MPM) is an aggressive, treatment-resistant, and generally fatal disease. A 68-year-old male who was diagnosed with MPM at another hospital came to our hospital with dyspnea. We advised him to take combination chemotherapy but he refused to take the treatment. That was because he had already received chemotherapy with supportive care at another hospital but his condition worsened. Thus, we recommended photodynamic therapy (PDT) to deal with the dyspnea and MPM. After PDT, the dyspnea improved and the patient then decided to take the combination chemotherapy. Our patient received chemotherapy using pemetrexed/cisplatin. Afterwards, he received a single PDT treatment and then later took chemotherapy using gemcitabine/cisplatin. The patient showed a survival time of 27 months, which is longer than median survival time in advanced MPM patients. Further research and clinical trials are needed to demonstrate any synergistic effect between the combination chemotherapy and PDT.
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Affiliation(s)
- Jae-Wook Ryu
- Department of Thoracic and Cardiovascular Surgery, Dankook University College of Medicine, Cheonan, Korea
| | - Youn Seup Kim
- Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Korea
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Abstract
Photodynamic therapy (PDT) is a form of non-ionizing radiation therapy that uses a drug, called a photosensitizer, combined with light to produce singlet oxygen ((1)O2) that can exert anti-cancer activity through apoptotic, necrotic, or autophagic tumor cell death. PDT is increasingly being used to treat thoracic malignancies. For early-stage non-small cell lung cancer (NSCLC), PDT is primarily employed as an endobronchial therapy to definitively treat endobronchial or roentgenographically occult tumors. Similarly, patients with multiple primary lung cancers may be definitively treated with PDT. For advanced or metastatic NSCLC and small cell lung cancer (SCLC), PDT is primarily employed to palliate symptoms from obstructing endobronchial lesions causing airway compromise or hemoptysis. PDT can be used in advanced NSCLC to attempt to increase operability or to reduce the extent of operation intervention required, and selectively to treat pleural dissemination intraoperatively following macroscopically complete surgical resection. Intraoperative PDT can be safely combined with macroscopically complete surgical resection and other treatment modalities for malignant pleural mesothelioma (MPM) to improve local control and prolong survival. This report reviews the mechanism of and rationale for using PDT to treat thoracic malignancies, details prospective and major retrospectives studies of PDT to treat NSCLC, SCLC, and MPM, and describes improvements in and future roles and directions of PDT.
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Affiliation(s)
- Charles B Simone
- Department of Radiation Oncology, Hospital of the University of Pennsylvania, Philadelphia, PA..
| | - Keith A Cengel
- Department of Radiation Oncology, Hospital of the University of Pennsylvania, Philadelphia, PA
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