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Sahu K, Krishna H, Shrivastava R, Majumdar A, Chowdhury A, Chakraborty S, Majumder SK. Evaluation of the potential of Delta-aminolevulinic acid for simultaneous detection of bioburden and anti-microbial photodynamic therapy of MRSA infected wounds in Swiss albino mice. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2024; 254:112892. [PMID: 38513542 DOI: 10.1016/j.jphotobiol.2024.112892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 02/13/2024] [Accepted: 03/14/2024] [Indexed: 03/23/2024]
Abstract
BACKGROUND The dramatic increase of drug-resistant bacteria necessitates urgent development of platforms to simultaneously detect and inactivate bacteria causing wound infections, but are confronted with various challenges. Delta amino levulinic acid (ALA) induced protoporphyrin IX (PpIX) can be a promising modality for simultaneous bioburden diagnostics and therapeutics. Herein, we report utility of ALA induced protoporphyrin (PpIX) based simultaneous bioburden detection, photoinactivation and therapeutic outcome assessment in methicillin resistant Staphylococcus aureus (MRSA) infected wounds of mice. METHODS MRSA infected wounds treated with 10% ALA were imaged with help of a blue LED (∼405 nm) based, USB powered, hand held device integrated with a modular graphic user interface (GUI). Effect of ALA application time, bacteria load, post bacteria application time points on wound fluorescence studied. PpIX fluorescence observed after excitation with blue LEDs was used to detect bioburden, start red light mediated antimicrobial photodynamic therapy (aPDT), determine aPDT effectiveness and assess selectivity of the approach. RESULTS ALA-PpIX fluorescence of wound bed discriminates infected from uninfected wounds and detects clinically relevant load. While wound fluorescence pattern changes as a function of ALA incubation and post infection time, intra-wound inhomogeneity in fluorescence correlates with the Gram staining data on presence of biofilms foci. Lack of red fluorescence from wound granulation tissue treated with ALA suggests selectivity of the approach. Further, significant reduction (∼50%) in red fluorescence, quantified using the GUI, relates well with bacteria load reduction observed post topical aPDT. CONCLUSION The potential of ALA induced PpIX for simultaneous detection of bioburden, photodynamic inactivation and "florescence-guided aPDT assessment" is demonstrated in MRSA infected wounds of mice.
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Affiliation(s)
- Khageswar Sahu
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh 452013, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumbai 400 094, India.
| | - Hemant Krishna
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh 452013, India
| | - Rashmi Shrivastava
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh 452013, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumbai 400 094, India
| | - Anamitra Majumdar
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh 452013, India
| | - Anupam Chowdhury
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh 452013, India
| | - Sourabrata Chakraborty
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh 452013, India
| | - Shovan Kumar Majumder
- Laser Biomedical Applications Division, Raja Ramanna Centre for Advanced Technology, Indore, Madhya Pradesh 452013, India; Homi Bhaba National Institute, Training School Complex, Anushakti Nagar, Mumbai 400 094, India
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Efendiev K, Alekseeva P, Shiryaev A, Voitova A, Linkov K, Pisareva T, Reshetov I, Loschenov V. Near-infrared phototheranostics of tumors with protoporphyrin IX and chlorin e6 photosensitizers. Photodiagnosis Photodyn Ther 2023; 42:103566. [PMID: 37059163 DOI: 10.1016/j.pdpdt.2023.103566] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 04/06/2023] [Accepted: 04/11/2023] [Indexed: 04/16/2023]
Abstract
BACKGROUND The study aims to develop a method for phototheranostics of tumors in the near-infrared (NIR) range using protoporphyrin IX (PpIX) and chlorin e6 (Ce6) photosensitizers (PSs) MATERIALS AND METHODS: Phototheranostics includes spectral fluorescence diagnostics of PS distribution and photodynamic therapy (PDT) using a single laser in the red spectral range. PpIX and Ce6 fluorescence were registered in the NIR range. PpIX and Ce6 photobleaching was determined during PDT by the change in PS fluorescence. NIR phototheranostics with PpIX and Ce6 were performed on optical phantoms and tumors of patients with oral leukoplakia and basal cell carcinoma. RESULTS NIR spectral fluorescence diagnostics of optical phantoms with PpIX or Ce6 is possible when fluorescence is excited by 635 or 660 nm lasers. Fluorescence intensity of PpIX and Ce6 was measured in the range of 725-780 nm. The highest values of signal-to-noise in the case of phantoms with PpIX were observed at λexc=635 nm, and for phantoms with Ce6 at λexc=660 nm. NIR phototheranostics provides the detection of tumor tissues with PpIX or Ce6 accumulation. The PSs photobleaching in the tumor during PDT occurs according to a bi-exponential law. CONCLUSION Phototheranostics of tumors containing PpIX or Ce6 allows fluorescent monitoring of PS distribution in the NIR range and measuring PSs photobleaching during light exposure that provides personalization of the photodynamic exposure duration to deeper tumors. Using a single laser for fluorescence diagnostics and PDT reduces patient treatment time.
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Affiliation(s)
- Kanamat Efendiev
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; Department of Laser Micro-, Nano-, and Biotechnology, Institute of Engineering Physics for Biomedicine, National Research Nuclear University "MEPhI", 115409 Moscow, Russia.
| | - Polina Alekseeva
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia.
| | - Artem Shiryaev
- Sechenov First Moscow State Medical University, Ministry of Health of the Russian Federation, Levshin Institute of Cluster Oncology, University Clinical Hospital No.1, 119435 Moscow, Russia.
| | | | - Kirill Linkov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia.
| | - Tatiana Pisareva
- Sechenov First Moscow State Medical University, Ministry of Health of the Russian Federation, Levshin Institute of Cluster Oncology, University Clinical Hospital No.1, 119435 Moscow, Russia.
| | - Igor Reshetov
- Sechenov First Moscow State Medical University, Ministry of Health of the Russian Federation, Levshin Institute of Cluster Oncology, University Clinical Hospital No.1, 119435 Moscow, Russia.
| | - Victor Loschenov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; Department of Laser Micro-, Nano-, and Biotechnology, Institute of Engineering Physics for Biomedicine, National Research Nuclear University "MEPhI", 115409 Moscow, Russia.
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Pedrosa L, Bedia C, Diao D, Mosteiro A, Ferrés A, Stanzani E, Martínez-Soler F, Tortosa A, Pineda E, Aldecoa I, Centellas M, Muñoz-Tudurí M, Sevilla A, Sierra À, González Sánchez JJ. Preclinical Studies with Glioblastoma Brain Organoid Co-Cultures Show Efficient 5-ALA Photodynamic Therapy. Cells 2023; 12:cells12081125. [PMID: 37190034 DOI: 10.3390/cells12081125] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/25/2023] [Accepted: 04/03/2023] [Indexed: 05/17/2023] Open
Abstract
BACKGROUND The high recurrence of glioblastoma (GB) that occurs adjacent to the resection cavity within two years of diagnosis urges an improvement of therapies oriented to GB local control. Photodynamic therapy (PDT) has been proposed to cleanse infiltrating tumor cells from parenchyma to ameliorate short long-term progression-free survival. We examined 5-aminolevulinic acid (5-ALA)-mediated PDT effects as therapeutical treatment and determined optimal conditions for PDT efficacy without causing phototoxic injury to the normal brain tissue. METHODS We used a platform of Glioma Initiation Cells (GICs) infiltrating cerebral organoids with two different glioblastoma cells, GIC7 and PG88. We measured GICs-5-ALA uptake and PDT/5-ALA activity in dose-response curves and the efficacy of the treatment by measuring proliferative activity and apoptosis. RESULTS 5-ALA (50 and 100 µg/mL) was applied, and the release of protoporphyrin IX (PpIX) fluorescence measures demonstrated that the emission of PpIX increases progressively until its stabilization at 24 h. Moreover, decreased proliferation and increased apoptosis corroborated the effect of 5-ALA/PDT on cancer cells without altering normal cells. CONCLUSIONS We provide evidence about the effectiveness of PDT to treat high proliferative GB cells in a complex in vitro system, which combines normal and cancer cells and is a useful tool to standardize new strategic therapies.
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Affiliation(s)
- Leire Pedrosa
- Laboratory of Experimental Oncological Neurosurgery, Neurosurgery Service, Hospital Clinic de Barcelona-FCRB, 08036 Barcelona, Spain
| | - Carmen Bedia
- Institute of Environmental Assessment and Water Research (IDAEA-CSIC), 08034 Barcelona, Spain
| | - Diouldé Diao
- Laboratory of Experimental Oncological Neurosurgery, Neurosurgery Service, Hospital Clinic de Barcelona-FCRB, 08036 Barcelona, Spain
| | - Alejandra Mosteiro
- Department of Neurosurgery, Hospital Clínic de Barcelona, University of Barcelona, 08036 Barcelona, Spain
| | - Abel Ferrés
- Department of Neurosurgery, Hospital Clínic de Barcelona, University of Barcelona, 08036 Barcelona, Spain
| | - Elisabetta Stanzani
- Laboratory of Pharmacology and Brain Pathology, IRCCS Humanitas Research Hospital, 20089 Milan, Italy
| | - Fina Martínez-Soler
- Apoptosis and Cancer Unit, Department of Basic Nursing, IDIBELL, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 L'Hospitalet del Llobregat, Spain
| | - Avelina Tortosa
- Apoptosis and Cancer Unit, Department of Basic Nursing, IDIBELL, Faculty of Medicine and Health Sciences, University of Barcelona, 08907 L'Hospitalet del Llobregat, Spain
| | - Estela Pineda
- Medical Oncology Department, Hospital Clinic and Translational Genomics and Targeted Therapies in Solid Tumors, IDIBAPS, 08036 Barcelona, Spain
| | - Iban Aldecoa
- Department of Pathology, Biomedical Diagnostic Center, Hospital Clínic of Barcelona, University of Barcelona, 08036 Barcelona, Spain
- Neurological Tissue Bank of the Biobank, Institute of Biomedical Research August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain
| | | | | | - Ana Sevilla
- Department of Cell Biology, Physiology and Immunology, Faculty of Biology, University of Barcelona, 08028 Barcelona, Spain
- Institute of Biomedicine, University of Barcelona (IBUB), 08036 Barcelona, Spain
| | - Àngels Sierra
- Laboratory of Experimental Oncological Neurosurgery, Neurosurgery Service, Hospital Clinic de Barcelona-FCRB, 08036 Barcelona, Spain
- Department of Medicine and Life Sciences (MELIS), Faculty of Health and Live Sciences, Universitat Pompeu Fabra, 08036 Barcelona, Spain
| | - José Juan González Sánchez
- Laboratory of Experimental Oncological Neurosurgery, Neurosurgery Service, Hospital Clinic de Barcelona-FCRB, 08036 Barcelona, Spain
- Department of Neurosurgery, Hospital Clínic de Barcelona, University of Barcelona, 08036 Barcelona, Spain
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Marois M, Olson JD, Wirth DJ, Elliott JT, Fan X, Davis SC, Paulsen KD, Roberts DW. A birefringent spectral demultiplexer enables fast hyper-spectral imaging of protoporphyrin IX during neurosurgery. Commun Biol 2023; 6:341. [PMID: 36991092 PMCID: PMC10060426 DOI: 10.1038/s42003-023-04701-9] [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: 02/02/2022] [Accepted: 03/13/2023] [Indexed: 03/31/2023] Open
Abstract
Hyperspectral imaging and spectral analysis quantifies fluorophore concentration during fluorescence-guided surgery1-6. However, acquisition of the multiple wavelengths required to implement these methods can be time-consuming and hinder surgical workflow. To this end, a snapshot hyperspectral imaging system capable of acquiring 64 channels of spectral data simultaneously was developed for rapid hyperspectral imaging during neurosurgery. The system uses a birefringent spectral demultiplexer to split incoming light and redirect wavelengths to different sections of a large format microscope sensor. Its configuration achieves high optical throughput, accepts unpolarized input light and exceeds channel count of prior image-replicating imaging spectrometers by 4-fold. Tissue-simulating phantoms consisting of serial dilutions of the fluorescent agent characterize system linearity and sensitivity, and comparisons to performance of a liquid crystal tunable filter based hyperspectral imaging device are favorable. The new instrument showed comparable, if not improved, sensitivity at low fluorophore concentrations; yet, acquired wide-field images at more than 70-fold increase in frame rate. Image data acquired in the operating room during human brain tumor resection confirm these findings. The new device is an important advance in achieving real-time quantitative imaging of fluorophore concentration for guiding surgery.
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Affiliation(s)
- Mikael Marois
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA
| | - Jonathan D Olson
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA
| | - Dennis J Wirth
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA
- Geisel School of Medicine, Dartmouth College, Hanover, NH, USA
| | - Jonathan T Elliott
- Geisel School of Medicine, Dartmouth College, Hanover, NH, USA
- Dartmouth-Health, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - Xiaoyao Fan
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA
| | - Scott C Davis
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA
| | - Keith D Paulsen
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA.
- Geisel School of Medicine, Dartmouth College, Hanover, NH, USA.
| | - David W Roberts
- Geisel School of Medicine, Dartmouth College, Hanover, NH, USA
- Dartmouth-Health, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
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Di Cristofori A, Carone G, Rocca A, Rui CB, Trezza A, Carrabba G, Giussani C. Fluorescence and Intraoperative Ultrasound as Surgical Adjuncts for Brain Metastases Resection: What Do We Know? A Systematic Review of the Literature. Cancers (Basel) 2023; 15:cancers15072047. [PMID: 37046709 PMCID: PMC10092992 DOI: 10.3390/cancers15072047] [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: 02/26/2023] [Revised: 03/25/2023] [Accepted: 03/27/2023] [Indexed: 04/14/2023] Open
Abstract
(1) Background: brain metastases (BMs) are the most common neoplasm of the central nervous system; despite the high incidence of this type of tumour, to date there is no universal consensus on the most effective treatment in patients with BMs, even if surgery still plays a primary role. Despite this, the adjunct systems that help to reach the GTR, which are well structured for other tumour forms such as ultrasound and fluorescence systems, are not yet well employed and standardised in surgical practice. The aim of this review is to provide a picture of the current state-of-art of the roles of iOUS and intraoperative fluorescence to better understand their potential roles as surgical tools. (2) Methods: to reach this goal, the PubMed database was searched using the following string as the keyword: (((Brain cerebral metastasis [MeSH Major Topic])OR (brain metastasis, [MeSH Major Topic])) AND ((5-ala, [MeSH Terms]) OR (Aminolevulinicacid [All fields]) OR (fluorescein, [MeSH Terms]) OR (contrast enhanced ultrasound [MeSH Terms])OR ((intraoperative ultrasound. [MeSH Terms]))) AND (english [Filter]) AND ((english [Filter]) AND (2010:2022 [pdat])) AND (english [Filter]). (3) Results: from our research, a total of 661 articles emerged; of these, 57 were selected. 21 of these included BMs generically as a secondary class for comparisons with gliomas, without going deeply into specific details. Therefore, for our purposes, 36 articles were considered. (4) Conclusions: with regard to BMs treatment and their surgical adjuncts, there is still much to be explored. This is mainly related to the heterogeneity of patients, the primary tumour histology and the extent of systemic disease; regardless, surgery plays a paramount role in obtaining a local disease control, and more standardised surgical protocols need to be made, with the aim of optimizing the use of the available surgical adjuncts and in order to increase the rate of GTR.
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Affiliation(s)
- Andrea Di Cristofori
- Division of Neurosurgery, Fondazione IRCCS San Gerardo dei Tintori, Via GB Pergolesi, 20900 Monza, Italy
- PhD Program in Neuroscience, University of Milano-Bicocca, Piazza Ateneo Nuovo 1, 20126 Milano, Italy
| | - Giovanni Carone
- Department of Neurosurgery, School of Medicine, Surgery Università degli Studi di Milano-Bicocca, Piazza Ateneo Nuovo 1, 20126 Milano, Italy
| | - Alessandra Rocca
- Department of Neurosurgery, School of Medicine, Surgery Università degli Studi di Milano-Bicocca, Piazza Ateneo Nuovo 1, 20126 Milano, Italy
| | - Chiara Benedetta Rui
- Department of Neurosurgery, School of Medicine, Surgery Università degli Studi di Milano-Bicocca, Piazza Ateneo Nuovo 1, 20126 Milano, Italy
| | - Andrea Trezza
- Division of Neurosurgery, Fondazione IRCCS San Gerardo dei Tintori, Via GB Pergolesi, 20900 Monza, Italy
| | - Giorgio Carrabba
- Division of Neurosurgery, Fondazione IRCCS San Gerardo dei Tintori, Via GB Pergolesi, 20900 Monza, Italy
- Department of Neurosurgery, School of Medicine, Surgery Università degli Studi di Milano-Bicocca, Piazza Ateneo Nuovo 1, 20126 Milano, Italy
| | - Carlo Giussani
- Division of Neurosurgery, Fondazione IRCCS San Gerardo dei Tintori, Via GB Pergolesi, 20900 Monza, Italy
- Department of Neurosurgery, School of Medicine, Surgery Università degli Studi di Milano-Bicocca, Piazza Ateneo Nuovo 1, 20126 Milano, Italy
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Walke A, Black D, Valdes PA, Stummer W, König S, Suero-Molina E. Challenges in, and recommendations for, hyperspectral imaging in ex vivo malignant glioma biopsy measurements. Sci Rep 2023; 13:3829. [PMID: 36882505 PMCID: PMC9992662 DOI: 10.1038/s41598-023-30680-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 02/28/2023] [Indexed: 03/09/2023] Open
Abstract
The visualization of protoporphyrin IX (PPIX) fluorescence with the help of surgical microscopes during 5-aminolevulinic acid-mediated fluorescence-guided resection (FGR) of gliomas is still limited at the tumor margins. Hyperspectral imaging (HI) detects PPIX more sensitively but is not yet ready for intraoperative use. We illustrate the current status with three experiments and summarize our own experience using HI: (1) assessment of HI analysis algorithm using pig brain tissue, (2) a partially retrospective evaluation of our experience from HI projects, and (3) device comparison of surgical microscopy and HI. In (1), we address the problem that current algorithms for evaluating HI data are based on calibration with liquid phantoms, which have limitations. Their pH is low compared to glioma tissue; they provide only one PPIX photo state and only PPIX as fluorophore. Testing the HI algorithm with brain homogenates, we found proper correction for optical properties but not pH. Considerably more PPIX was measured at pH 9 than at pH 5. In (2), we indicate pitfalls and guide HI application. In (3), we found HI superior to the microscope for biopsy diagnosis (AUC = 0.845 ± 0.024 (cut-off 0.75 µg PPIX/ml) vs. 0.710 ± 0.035). HI thus offers potential for improved FGR.
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Affiliation(s)
- Anna Walke
- Department of Neurosurgery, University Hospital of Münster, Albert-Schweitzer-Campus 1, A1, 48149, Münster, Germany.,Core Unit Proteomics, Interdisciplinary Centre for Clinical Research, University of Münster, Münster, Germany
| | - David Black
- Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, Canada
| | - Pablo A Valdes
- Department of Neurosurgery, University of Texas Medical Branch, Galveston, TX, USA
| | - Walter Stummer
- Department of Neurosurgery, University Hospital of Münster, Albert-Schweitzer-Campus 1, A1, 48149, Münster, Germany
| | - Simone König
- Core Unit Proteomics, Interdisciplinary Centre for Clinical Research, University of Münster, Münster, Germany
| | - Eric Suero-Molina
- Department of Neurosurgery, University Hospital of Münster, Albert-Schweitzer-Campus 1, A1, 48149, Münster, Germany.
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Optimization of novel exoscopic blue light filter during fluorescence-guided resection of Glioblastoma. J Neurooncol 2023; 161:617-623. [PMID: 36745272 DOI: 10.1007/s11060-022-04231-0] [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: 11/30/2022] [Accepted: 12/29/2022] [Indexed: 02/07/2023]
Abstract
PURPOSE Operative guidelines and use optimization for new surgical exoscopes are not well described in the literature. In this study, we evaluated use of the ORBEYE (Olympus) surgical exoscope system during 5-ALA fluorescence-guided resection of GBMs to optimize workflow and exoscope settings. METHODS The ORBEYE exoscope system was fitted with a blue light filter for 5-ALA mediated fluorescence-guided surgery (FGS). Intraoperative images were obtained during 5-ALA FGS in 9 patients with primary or recurrent GBM. The exoscope was set up at constant, increasing focal distances from the target tissue, and light source intensity varied. High-resolution 4 K images were captured and analyzed. Comparisons of fluorescence to background were then generated for use optimization. RESULTS Light intensity did not significantly influence tumor fluorescence (P = 0.878). However, focal distance significantly impacted relative fluorescent intensity (P = 0.007). Maximum average fluorescence was seen consistently at a focal length of 220 mm and a light intensity of approximately 75% maximum. Decreasing focal distance from 400 mm to 220 mm significantly increased visualized fluorescence (P = 0.0038). CONCLUSIONS The ORBEYE surgical exoscope system with blue light filter is a powerful imaging tool for 5-ALA FGS in GBM. The ORBEYE blue filter performs optimally at shorter focal distance with moderate light intensity. Similar to microscope systems, decreasing focal distance significantly influences visualized fluorescence.
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Qian Y, Wang J, Bu W, Zhu X, Zhang P, Zhu Y, Fan X, Wang C. Targeted implementation strategies of precise photodynamic therapy based on clinical and technical demands. Biomater Sci 2023; 11:704-718. [PMID: 36472233 DOI: 10.1039/d2bm01384c] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
With the development of materials science, photodynamic-based treatments have gradually entered clinics. Photodynamic therapy is ideal for cancer treatment due to its non-invasive and spatiotemporal properties and is the first to be widely promoted in clinical practice. However, the shortcomings resulting from the gap between technical and clinical demands, such as phototoxicity, low tissue permeability, and tissue hypoxia, limit its wide applications. This article reviews the available data regarding the pharmacological and clinical factors affecting the efficacy of photodynamic therapy, such as photosensitizers and oxygen supply, disease diagnosis, and other aspects of photodynamic therapy. In addition, the synergistic treatment of photodynamic therapy with surgery and nanotechnology is also discussed, which is expected to provide inspiration for the design of photodynamic therapy strategies.
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Affiliation(s)
- Yun Qian
- Dermatologic Surgery Department, Institute of dermatology, Chinese Academy of Medical Science & Peking Union Medical College, Nanjing, China.
| | - Jialun Wang
- Department of Gastroenterology, Affiliated Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China.
| | - Wenbo Bu
- Dermatologic Surgery Department, Institute of dermatology, Chinese Academy of Medical Science & Peking Union Medical College, Nanjing, China.
| | - Xiaoyan Zhu
- Dermatologic Surgery Department, Institute of dermatology, Chinese Academy of Medical Science & Peking Union Medical College, Nanjing, China.
| | - Ping Zhang
- Dermatologic Surgery Department, Institute of dermatology, Chinese Academy of Medical Science & Peking Union Medical College, Nanjing, China.
| | - Yun Zhu
- Department of Gastroenterology, Affiliated Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China. .,Department of Pharmacy, Nanjing Affiliated Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China.,Nanjing Medical Center for Clinical Pharmacy, Nanjing 210008, Jiangsu Province, China
| | - Xiaoli Fan
- Dermatologic Surgery Department, Institute of dermatology, Chinese Academy of Medical Science & Peking Union Medical College, Nanjing, China.
| | - Cheng Wang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China.
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Protoporphyrin IX derived from dual-species anaerobic biofilms of Fusobacterium necrophorum and Porphyromonas levii attenuates bovine neutrophil function. Biofilm 2022; 4:100095. [DOI: 10.1016/j.bioflm.2022.100095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/30/2022] Open
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10
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Lehtonen SJR, Vrzakova H, Paterno JJ, Puustinen S, Bednarik R, Hauta-Kasari M, Haneishi H, Immonen A, Jääskeläinen JE, Kämäräinen OP, Elomaa AP. Detection improvement of gliomas in hyperspectral imaging of protoporphyrin IX fluorescence - in vitro comparison of visual identification and machine thresholds. Cancer Treat Res Commun 2022; 32:100615. [PMID: 35905671 DOI: 10.1016/j.ctarc.2022.100615] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 06/23/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND 5-aminolevulinic acid (5-ALA) - precursor of protoporphyrin IX (PpIX) - is utilized in fluorescence guided surgery (FGS) of high-grade gliomas. PpIX is used to identify traces of glioma during resection. Visual inspection of the fluorescence seems inaccurate in comparison to optic techniques such as hyperspectral imaging (HSI). AIM To characterize the limits of PpIX fluorescence detection of (i) visual evaluation and (ii) HSI analysis and to (iii) develop a classification system for visible and non-visible PpIX fluorescence. METHODS Samples with increasing concentrations (C) of PpIX and non-fluorescent controls were evaluated using a surgical microscope under blue light illumination. Similar samples were imaged with a HSI system tuned to PpIX fluorescence peak wavelength (635 nm) and control (RGB) channels. Samples' intensities were defined, leading to 96 analysed pixels after batching. RESULTS Three expert neurosurgeons assessed the PpIX samples (n = 16) and controls (n = 8) with unanimous decisions (ICC = 0.704), resulting in 63% recognition rate, 48% sensitivity, 92% specificity, 92% positive predictive value (PPV) and 47% negative predictive value (NPV). HSI image analysis, comparing mean relative values, resulted in 96%, 100%, 86%, 94%, 100%, respectively. Minimum PpIX concentration detection for experts was 0.6-1.8 μmol/l and HSI's 0.03-0.15 μmol/l. CONCLUSIONS PpIX concentrations of low-grade gliomas, and those reported on glioblastoma infiltration zones, are below experts' detection threshold. HSI analysis exceeds the performance of expert's visual inspection nearly by 20-fold. Hybrid FGS-HSI systems should be investigated in parallel to long-term outcomes. Described methods are applicable as a standard for calibration, testing and development of subvisual FGS techniques.
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Affiliation(s)
- Samu J R Lehtonen
- Neurosurgery Clinical Research Unit, Institute of Clinical Sciences, School of Medicine, Faculty of Health Sciences, UEF University of Eastern Finland, Yliopistonranta 1C, 70211, Kuopio, Finland; Microneurosurgery Photonics Research Group of The Microsurgery Center of Eastern Finland, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland.
| | - Hana Vrzakova
- Microneurosurgery Photonics Research Group of The Microsurgery Center of Eastern Finland, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland; School of Computing, UEF University of Eastern Finland, Länsikatu 15, 80110 Joensuu, Finland; Institute of Photonics, UEF University of Eastern Finland, Länsikatu 15, 80110 Joensuu, Finland
| | - Jussi J Paterno
- Ophthalmology Clinical Research Unit, Institute of Clinical Sciences, School of Medicine, Faculty of Health Sciences, UEF University of Eastern Finland, Yliopistonranta 1C, 70211 Kuopio, Finland
| | - Sami Puustinen
- Neurosurgery Clinical Research Unit, Institute of Clinical Sciences, School of Medicine, Faculty of Health Sciences, UEF University of Eastern Finland, Yliopistonranta 1C, 70211, Kuopio, Finland; Microneurosurgery Photonics Research Group of The Microsurgery Center of Eastern Finland, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland
| | - Roman Bednarik
- School of Computing, UEF University of Eastern Finland, Länsikatu 15, 80110 Joensuu, Finland; Institute of Photonics, UEF University of Eastern Finland, Länsikatu 15, 80110 Joensuu, Finland
| | - Markku Hauta-Kasari
- School of Computing, UEF University of Eastern Finland, Länsikatu 15, 80110 Joensuu, Finland; Institute of Photonics, UEF University of Eastern Finland, Länsikatu 15, 80110 Joensuu, Finland
| | - Hideaki Haneishi
- Center for Frontier Medical Engineering (CFME), Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Arto Immonen
- Neurosurgery Clinical Research Unit, Institute of Clinical Sciences, School of Medicine, Faculty of Health Sciences, UEF University of Eastern Finland, Yliopistonranta 1C, 70211, Kuopio, Finland; Microneurosurgery Photonics Research Group of The Microsurgery Center of Eastern Finland, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland; Eastern Finland Neuro-Oncology Group, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland
| | - Juha E Jääskeläinen
- Neurosurgery Clinical Research Unit, Institute of Clinical Sciences, School of Medicine, Faculty of Health Sciences, UEF University of Eastern Finland, Yliopistonranta 1C, 70211, Kuopio, Finland; Microneurosurgery Photonics Research Group of The Microsurgery Center of Eastern Finland, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland; Eastern Finland Neuro-Oncology Group, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland
| | - Olli-Pekka Kämäräinen
- Neurosurgery Clinical Research Unit, Institute of Clinical Sciences, School of Medicine, Faculty of Health Sciences, UEF University of Eastern Finland, Yliopistonranta 1C, 70211, Kuopio, Finland; Microneurosurgery Photonics Research Group of The Microsurgery Center of Eastern Finland, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland; Eastern Finland Neuro-Oncology Group, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland
| | - Antti-Pekka Elomaa
- Neurosurgery Clinical Research Unit, Institute of Clinical Sciences, School of Medicine, Faculty of Health Sciences, UEF University of Eastern Finland, Yliopistonranta 1C, 70211, Kuopio, Finland; Microneurosurgery Photonics Research Group of The Microsurgery Center of Eastern Finland, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland; Eastern Finland Neuro-Oncology Group, Neurosurgery of Neurocenter, KUH Kuopio University Hospital, Puijonlaaksontie 2, 70210 Kuopio, Finland
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11
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5-Aminolevulinic Acid (5-ALA)-Induced Protoporphyrin IX Fluorescence by Glioma Cells-A Fluorescence Microscopy Clinical Study. Cancers (Basel) 2022; 14:cancers14122844. [PMID: 35740509 PMCID: PMC9221265 DOI: 10.3390/cancers14122844] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 05/25/2022] [Accepted: 06/06/2022] [Indexed: 02/05/2023] Open
Abstract
Simple Summary 5-aminolevulinic acid (5-ALA)-induced PpIX fluorescence is used in neurosurgery for intraoperative identification of high-grade glioma tissue. In this paper, using a fluorescence microscopy analysis on human tumor specimens, we assessed the actual number of fluorescence-positive tumor cells both in low-grade and high-grade glioma, and the ability of 5-ALA to cross the blood–brain barrier (BBB). We found that in high-grade gliomas, 32.7–75.5 percent of cells display 5-ALA induced PpIX fluorescence, whereas in low-grade gliomas the tumor cells did not fluoresce following 5-ALA. Immunofluorescence for BBB components suggested that 5-ALA does not cross the un-breached BBB. These findings are of crucial importance in planning neurosurgical resection of gliomas. Abstract 5-aminolevulinic acid (5-ALA)-induced PpIX fluorescence is used by neurosurgeons to identify the tumor cells of high-grade gliomas during operation. However, the issue of whether 5-ALA-induced PpIX fluorescence consistently stains all the tumor cells is still debated. Here, we assessed the cytoplasmatic signal of 5-ALA by fluorescence microscopy in a series of human gliomas. As tumor markers, we used antibodies against collapsin response-mediated protein 5 (CRMP5), alpha thalassemia/mental retardation syndrome X-linked (ATRX), and anti-isocitrate dehydrogenase 1 (IDH1). In grade III–IV gliomas, the signal induced by 5-ALA was detected in 32.7–75.5 percent of CRMP5-expressing tumor cells. In low-grade gliomas (WHO grade II), the CRMP5-expressing tumor cells did not fluoresce following 5-ALA. Immunofluorescence with antibodies that stain various components of the blood–brain barrier (BBB) suggested that 5-ALA does not cross the un-breached BBB, in spite of its small dimension. To conclude, 5-ALA-induced PpIX fluorescence has an established role in high-grade glioma surgery, but it has limited usefulness in surgery for low-grade glioma, especially when the BBB is preserved.
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12
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Wilson BC, Eu D. Optical Spectroscopy and Imaging in Surgical Management of Cancer Patients. TRANSLATIONAL BIOPHOTONICS 2022. [DOI: 10.1002/tbio.202100009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Brian C. Wilson
- Princess Margaret Cancer Centre/University Health Network 101 College Street Toronto Ontario Canada
- Department of Medical Biophysics, Faculty of Medicine University of Toronto Canada
| | - Donovan Eu
- Department of Otolaryngology‐Head and Neck Surgery‐Surgical Oncology, Princess Margaret Cancer Centre/University Health Network University of Toronto Canada
- Department of Otolaryngology‐Head and Neck Surgery National University Hospital System Singapore
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13
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Refining Glioblastoma Surgery through the Use of Intra-Operative Fluorescence Imaging Agents. Pharmaceuticals (Basel) 2022; 15:ph15050550. [PMID: 35631376 PMCID: PMC9143023 DOI: 10.3390/ph15050550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 04/22/2022] [Accepted: 04/25/2022] [Indexed: 02/01/2023] Open
Abstract
Glioblastoma (GBM) is the most aggressive adult brain tumour with a dismal 2-year survival rate of 26–33%. Maximal safe resection plays a crucial role in improving patient progression-free survival (PFS). Neurosurgeons have the significant challenge of delineating normal tissue from brain tumour to achieve the optimal extent of resection (EOR), with 5-Aminolevulinic Acid (5-ALA) the only clinically approved intra-operative fluorophore for GBM. This review aims to highlight the requirement for improved intra-operative imaging techniques, focusing on fluorescence-guided imaging (FGS) and the use of novel dyes with the potential to overcome the limitations of current FGS. The review was performed based on articles found in PubMed an.d Google Scholar, as well as articles identified in searched bibliographies between 2001 and 2022. Key words for searches included ‘Glioblastoma’ + ‘Fluorophore’+ ‘Novel’ + ‘Fluorescence Guided Surgery’. Current literature has favoured the approach of using targeted fluorophores to achieve specific accumulation in the tumour microenvironment, with biological conjugates leading the way. These conjugates target specific parts overexpressed in the tumour. The positive results in breast, ovarian and colorectal tissue are promising and may, therefore, be applied to intracranial neoplasms. Therefore, this design has the potential to produce favourable results in GBM by reducing the residual tumour, which translates to decreased tumour recurrence, morbidity and ultimately, mortality in GBM patients. Several preclinical studies have shown positive results with targeted dyes in distinguishing GBM cells from normal brain parenchyma, and targeted dyes in the Near-Infrared (NIR) emission range offer promising results, which may be valuable future alternatives.
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14
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Akimoto J, Fukami S, Ichikawa M, Nagai K, Kohno M. Preliminary Report: Rapid Intraoperative Detection of Residual Glioma Cell in Resection Cavity Walls Using a Compact Fluorescence Microscope. J Clin Med 2021; 10:jcm10225375. [PMID: 34830662 PMCID: PMC8620805 DOI: 10.3390/jcm10225375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/12/2021] [Accepted: 11/15/2021] [Indexed: 11/21/2022] Open
Abstract
Objective: The surgical eradication of malignant glioma cells is theoretically impossible. Therefore, reducing the number of remaining tumor cells around the brain–tumor interface (BTI) is crucial for achieving satisfactory clinical results. The usefulness of fluorescence–guided resection for the treatment of malignant glioma was recently reported, but the detection of infiltrating tumor cells in the BTI using a surgical microscope is not realistic. Therefore, we have developed an intraoperative rapid fluorescence cytology system, and exploratorily evaluated its clinical feasibility for the management of malignant glioma. Materials and methods: A total of 25 selected patients with malignant glioma (newly diagnosed: 17; recurrent: 8) underwent surgical resection under photodiagnosis using photosensitizer Talaporfin sodium and a semiconductor laser. Intraoperatively, a crush smear preparation was made from a tiny amount of tumor tissue, and the fluorescence emitted upon 620/660 nm excitation was evaluated rapidly using a compact fluorescence microscope in the operating theater. Results: Fluorescence intensities of tumor tissues measured using a surgical microscope correlated with the tumor cell densities of tissues evaluated by measuring the red fluorescence emitted from the cytoplasm of tumor cells using a fluorescence microscope. A “weak fluorescence” indicated a reduction in the tumor cell density, whereas “no fluorescence” did not indicate the complete eradication of the tumor cells, but indicated that few tumor cells were emitting fluorescence. Conclusion: The rapid intraoperative detection of fluorescence from glioma cells using a compact fluorescence microscope was probably useful to evaluate the presence of tumor cells in the resection cavity walls, and could provide surgical implications for the more complete resection of malignant gliomas.
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Affiliation(s)
- Jiro Akimoto
- Department of Neurosurgery, Kohsei Chuo General Hospital, Tokyo 153-0062, Japan
- Department of Neurosurgery, Tokyo Medical University, Tokyo 160-8402, Japan; (S.F.); (M.I.); (K.N.); (M.K.)
- Correspondence:
| | - Shinjiro Fukami
- Department of Neurosurgery, Tokyo Medical University, Tokyo 160-8402, Japan; (S.F.); (M.I.); (K.N.); (M.K.)
| | - Megumi Ichikawa
- Department of Neurosurgery, Tokyo Medical University, Tokyo 160-8402, Japan; (S.F.); (M.I.); (K.N.); (M.K.)
| | - Kenta Nagai
- Department of Neurosurgery, Tokyo Medical University, Tokyo 160-8402, Japan; (S.F.); (M.I.); (K.N.); (M.K.)
| | - Michihiro Kohno
- Department of Neurosurgery, Tokyo Medical University, Tokyo 160-8402, Japan; (S.F.); (M.I.); (K.N.); (M.K.)
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15
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Granata F, Duca L, Brancaleoni V, Fustinoni S, De Luca G, Motta I, Graziadei G, Di Pierro E. Alternative Pathway Involvement in Protoporphyria Patients Related to Sun Exposure. Front Immunol 2021; 12:615620. [PMID: 33664746 PMCID: PMC7921788 DOI: 10.3389/fimmu.2021.615620] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 01/25/2021] [Indexed: 11/17/2022] Open
Abstract
The homeostasis of tissues in a chronic disease is an essential function of the alternative pathway (AP) of the complement system (CS). However, if not controlled, it may also be detrimental to healthy cells with a consequent aggravation of symptoms. The protoporphyria (PP) is a rare chronic disease that causes phototoxicity in visible light with local skin pain and general malaise. In order to establish if there is a systemic involvement of the CS during sun exposure, we designed a non-invasive method with a serum collection in winter and summer from 19 PP and 13 controls to detect the levels of CS protein: Properdin, Factor H (FH), and C5. Moreover, the global radiation data were collected from the regional agency of environmental protection (ARPA). The results show growing values for every protein in patients with PP, compared to control, in both seasons, in particular in summer compared to winter. To reinforce the evidence, we have estimated the personal exposure of patients based on the global radiation data. The main factors of the AP increased over the season, confirming the involvement of the AP in relation to light exposure. The systemic response could justify the general malaise of patients after long light exposure and can be exploited to elucidate new therapeutic approaches.
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Affiliation(s)
- Francesca Granata
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, U.O.C. Medicina Generale, Milan, Italy
| | - Lorena Duca
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, U.O.C. Medicina Generale, Milan, Italy
| | - Valentina Brancaleoni
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, U.O.C. Medicina Generale, Milan, Italy
| | - Silvia Fustinoni
- EPIGET - Epidemiology, Epigenetics, and Toxicology Lab, Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy.,Environmental and Industrial Toxicology Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Giacomo De Luca
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, U.O.C. Medicina Generale, Milan, Italy
| | - Irene Motta
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, U.O.C. Medicina Generale, Milan, Italy.,Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Giovanna Graziadei
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, U.O.C. Medicina Generale, Milan, Italy
| | - Elena Di Pierro
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, U.O.C. Medicina Generale, Milan, Italy
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16
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Fujiwara H, Takahara N, Tateishi K, Tanaka M, Kanai S, Kato H, Nakatsuka T, Yamamoto K, Kogure H, Arita J, Nakai Y, Kasuga M, Ushiku T, Hasegawa K, Koike K. 5-Aminolevulinic acid-mediated photodynamic activity in patient-derived cholangiocarcinoma organoids. Surg Oncol 2020; 35:484-490. [PMID: 33126085 DOI: 10.1016/j.suronc.2020.10.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/21/2020] [Accepted: 10/19/2020] [Indexed: 01/03/2023]
Abstract
BACKGROUND Accurate diagnosis of the disease extension of cholangiocarcinoma (CCA) is often difficult in clinical practice. The diagnostic yield of conventional pre-operative imaging or endoscopic procedures is sometimes insufficient for the evaluation of longitudinal spreading of CCA. Here we investigated the usefulness of 5-aminolevulinic acid (5-ALA) for the pre- or intra-operative diagnosis of CCA, using patient-derived organoids. METHODS Four CCA- and two adjacent tissue-derived organoids were established. After 5-ALA treatment, we assessed their photodynamic activity using fluorescence microscopy. RESULTS CCA organoids established from different patients showed diverse morphology in contrast to monolayer structures of non-tumor organoids, and had the ability to form subcutaneous tumors in immunodeficient mice. CCA organoids demonstrated remarkably high photodynamic activity based on higher accumulation of protoporphyrin IX as a metabolite of 5-ALA compared to non-tumor organoids (40-71% vs. < 4%, respectively). Importantly, cancer cell-specific high photodynamic activity distinguished the organoids originated from biliary stenotic lesions from those of non-stenotic lesions in a CCA patient. The high photodynamic activity did not depend on the expression profile of heme biosynthesis genes. CONCLUSIONS Distinct 5-ALA-based photodynamic activity could have diagnostic potential for the discrimination of CCA from non-tumor tissues.
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Affiliation(s)
- Hiroaki Fujiwara
- Division of Gastroenterology, The Institute for Adult Diseases, Asahi Life Foundation, 2-2-6 Bakurocho, Chuo-ku, Tokyo, 103-0002, Japan; Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
| | - Naminatsu Takahara
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Keisuke Tateishi
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Mariko Tanaka
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Sachiko Kanai
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hiroyuki Kato
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Takuma Nakatsuka
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Keisuke Yamamoto
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Hirofumi Kogure
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Junichi Arita
- Hepato-Biliary-Pancreatic Division, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Yousuke Nakai
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Masato Kasuga
- Division of Research, The Institute for Adult Diseases, Asahi Life Foundation, 2-2-6 Bakurocho, Chuo-ku, Tokyo, 103-0002, Japan
| | - Tetsuo Ushiku
- Department of Pathology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Kiyoshi Hasegawa
- Hepato-Biliary-Pancreatic Division, Department of Surgery, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Kazuhiko Koike
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
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17
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Meershoek P, KleinJan GH, van Willigen DM, Bauwens KP, Spa SJ, van Beurden F, van Gennep EJ, Mottrie AM, van der Poel HG, Buckle T, van Leeuwen FWB, van Oosterom MN. Multi-wavelength fluorescence imaging with a da Vinci Firefly-a technical look behind the scenes. J Robot Surg 2020; 15:751-760. [PMID: 33179201 PMCID: PMC8423683 DOI: 10.1007/s11701-020-01170-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 10/29/2020] [Indexed: 12/19/2022]
Abstract
The field of fluorescence-guided surgery builds on colored fluorescent tracers that have become available for different clinical applications. Combined use of complementary fluorescent emissions can allow visualization of different anatomical structures (e.g. tumor, lymphatics and nerves) in the same patient. With the aim to assess the requirements for multi-color fluorescence guidance under in vivo conditions, we thoroughly characterized two FDA-approved laparoscopic Firefly camera systems available on the da Vinci Si or da Vinci Xi surgical robot. In this process, we studied the cameras’ performance with respect to the photophysical properties of the FDA-approved dyes Fluorescein and ICG. Our findings indicate that multi-wavelength fluorescence imaging of Fluorescein and ICG is possible using clinical-grade fluorescence laparoscopes, but critical factors for success include the photophysical dye properties, imaging system performance and the amount of accumulated dye. When comparing the camera performance, the Xi system provided more effective excitation (adaptions in the light source) and higher detection sensitivity (chip-on-a-tip and/or enhanced image processing) for both Fluorescein and ICG. Both systems can readily be used for multi-wavelength fluorescence imaging of Fluorescein and ICG under clinically relevant conditions. With that, another step has been made towards the routine implementation of multi-wavelength image-guided surgery concepts.
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Affiliation(s)
- Philippa Meershoek
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands.,Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Gijs H KleinJan
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands.,Department of Urology, Leiden University Medical Center, Leiden, The Netherlands
| | - Danny M van Willigen
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Silvia J Spa
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Florian van Beurden
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands.,Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Erik J van Gennep
- Department of Urology, Leiden University Medical Center, Leiden, The Netherlands
| | - Alexandre M Mottrie
- Orsi Academy, Melle, Belgium.,Department of Urology, Onze-Lieve-Vrouw Hospital, Aalst, Belgium
| | - Henk G van der Poel
- Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - T Buckle
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands.,Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Fijs W B van Leeuwen
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands.,Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands.,Orsi Academy, Melle, Belgium
| | - Matthias N van Oosterom
- Interventional Molecular Imaging Laboratory, Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands. .,Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands.
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18
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Wirth DJ, Sibai M, Wilson BC, Roberts DW, Paulsen K. First experience with spatial frequency domain imaging and red-light excitation of protoporphyrin IX fluorescence during tumor resection. BIOMEDICAL OPTICS EXPRESS 2020; 11:4306-4315. [PMID: 32923044 PMCID: PMC7449712 DOI: 10.1364/boe.397507] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 05/13/2023]
Abstract
Fluorescence-guided surgery (FGS) enhances intraoperative visualization of tumors to maximize safe resection, and quantitative fluorescence imaging (qFI) of protoporphyrin IX (PpIX) has provided additional information for guidance during intracranial tumor surgery. Previous developments in fluorescence quantification have demonstrated that the depth of fluorescence signals can be estimated given known optical properties in a lab setting, and now with the work described here that these optical properties can be determined in vivo in human brain tissue in the operating room (OR) during tumor resection procedures. More specifically, we report the first depth estimation of subsurface tumor intraoperatively, achieved with the combination of spatial frequency domain imaging (SFDI) for optical property measurement and red-light excitation of PpIX. We modified a commercial surgical microscope (Zeiss) with a digital light processing module (DLI Austin, TX) to modulate light from a xenon arc lamp to illuminate the field. White-light excitation and a liquid crystal tunable filter (LCTF Verispec) were used to measure diffuse reflectance at discrete wavelengths of 670 nm and 710 nm on a sCMOS camera. An illumination-side filter wheel allowed excitation of PpIX fluorescence at 405 nm and 635 nm, and the LCTF measured fluorescence emissions at 670 nm and 710 nm. Data acquisition and processing generated wide-field images of the depth of PpIX fluorescence within 1 minute in the OR. The ability of the clinical microscope to perform optical property mapping with SFDI and convert these wide-field estimates into images of the depth of fluorescence was tested in tissue simulating phantoms and in vivo during a craniotomy for brain tumor resection. Results indicate that wide-field optical property estimates with SFDI can be combined with depth sensing algorithms to produce maps of the depth of PpIX when exposed to red-light in the OR.
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Affiliation(s)
- Dennis J. Wirth
- Department of Surgery, Dartmouth Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH 03756, USA
| | - Mira Sibai
- Princess Margaret Cancer Center/University Health Network, 101 College Street, Toronto, ON M5G 1L7, Canada
- Dept. of Medical Biophysics, University of Toronto, Faculty of Medicine, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Brian C. Wilson
- Princess Margaret Cancer Center/University Health Network, 101 College Street, Toronto, ON M5G 1L7, Canada
- Dept. of Medical Biophysics, University of Toronto, Faculty of Medicine, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - David W. Roberts
- Department of Surgery, Dartmouth Hitchcock Medical Center, One Medical Center Drive, Lebanon, NH 03756, USA
- Dartmouth College, Thayer School of Engineering, 14 Engineering Drive, Hanover, NH 03755, USA
| | - Keith Paulsen
- Dartmouth College, Thayer School of Engineering, 14 Engineering Drive, Hanover, NH 03755, USA
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19
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Charalampaki P, Proskynitopoulos PJ, Heimann A, Nakamura M. 5-Aminolevulinic Acid Multispectral Imaging for the Fluorescence-Guided Resection of Brain Tumors: A Prospective Observational Study. Front Oncol 2020; 10:1069. [PMID: 32733798 PMCID: PMC7362891 DOI: 10.3389/fonc.2020.01069] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 05/28/2020] [Indexed: 12/14/2022] Open
Abstract
Fluorescence-guided surgery with five-aminolevulinic acid (5-ALA) is the state-of-the-art treatment of high-grade gliomas. However, intraoperative visualization of 5-ALA under blue light remains challenging, especially when blood covers the surgical field and thereby fluorescence. To overcome this problem and combine the brightness of visible light with the information delivered with fluorescence, we implemented multispectral fluorescence (MFL) in a surgical microscope, a technique that is able to project both information in real-time. We prospectively examined 25 patients with brain tumors. One patient was operated on two different lesions in the same setting. The tumors comprised: six glioblastomas, four anaplastic astrocytomas, one anaplastic oligodendroglioma, two meningiomas, 11 metastatic tumors, one acoustic neuroma, and one ependymoma. The MFL technique with a real-time overlay of fluorescence and white light was compared intraoperatively to the classic blue filter. All lesions were clearly visible and highlighted from the surrounding tissue. The pseudocolor we chose was green, representing fluorescence, with the surrounding brain tissue remaining in its original color. When blood was covering the surgical field, orientation was easy to maintain. The MFL technique opens the way for precise and clear visualization of fluorescence in real-time under white light. It can be easily used for the resection of all tumors accumulating 5-ALA. Drawbacks of classic PpIX fluorescence such as hidden fluorescence, intraoperative changes could be overcome with the presence of additional white light in MFL technique.
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Affiliation(s)
- Patra Charalampaki
- Department of Neurosurgery, Cologne Medical Center, Cologne, Germany
- Witten-Herdecke University, Witten, Germany
| | | | - Axel Heimann
- Institute for Neurosurgical Pathophysiology, Medical University Mainz, Mainz, Germany
| | - Makoto Nakamura
- Department of Neurosurgery, Cologne Medical Center, Cologne, Germany
- Witten-Herdecke University, Witten, Germany
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Evaluation of Diagnostic Accuracy Following the Coadministration of Delta-Aminolevulinic Acid and Second Window Indocyanine Green in Rodent and Human Glioblastomas. Mol Imaging Biol 2020; 22:1266-1279. [PMID: 32514886 DOI: 10.1007/s11307-020-01504-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
PURPOSE Fluorescence-guided-surgery offers intraoperative visualization of neoplastic tissue. Delta-aminolevulinic acid (5-ALA), which targets enzymatic abnormality in neoplastic cells, is the only approved agent for fluorescence-guided neurosurgery. More recently, we described Second Window Indocyanine Green (SWIG) which targets neoplastic tissue through enhanced vascular permeability. We hypothesized that SWIG would demonstrate similar clinical utility in identification of high-grade gliomas compared with 5-ALA. PROCEDURES Female C57/BL6 and nude/athymic mice underwent intracranial implantation of 300,000 GL261 and U87 cells, respectively. Tumor-bearing mice were euthanized after administration of 5-ALA (200 mg/kg intraperitoneal) and SWIG (5 mg/kg intravenous). Brain sections were imaged for protoporphyrin-IX and ICG fluorescence. Fluorescence and H&E images were registered using semi-automatic scripts for analysis. Human subjects with HGG were administered SWIG (2.5 mg/kg intravenous) and 5-ALA (20 mg/kg oral). Intraoperatively, tumors were imaged for ICG and protoporphyrin-IX fluorescence. RESULTS In non-necrotic tumors, 5-ALA and SWIG demonstrated 90.2 % and 89.2 % tumor accuracy (p value = 0.52) in U87 tumors and 88.1 % and 87.7 % accuracy (p value = 0.83) in GL261 tumors. The most distinct difference between 5-ALA and SWIG distribution was seen in areas of tumor-associated necrosis, which often showed weak/no protoporphyrin-IX fluorescence, but strong SWIG fluorescence. In twenty biopsy specimens from four subjects with HGG, SWIG demonstrated 100 % accuracy, while 5-ALA demonstrated 75-85 % accuracy; there was 90 % concordance between SWIG and 5-ALA fluorescence. CONCLUSION Our results provide the first direct comparison of the diagnostic utility of SWIG vs 5-ALA in both rodent and human HGG. Given the broader clinical utility of SWIG compared with 5-ALA, our data supports the use of SWIG in tumor surgery to improve the extent of safe resections. CLINICAL TRIAL NCT02710240 (US National Library of Medicine Registry; https://www.clinicaltrials.gov/ct2/show/NCT02710240?id=NCT02710240&draw=2&rank=1 ).
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Garcia MR, Requena MB, Pratavieira S, Moriyama LT, Becker M, Bagnato VS, Kurachi C, Magalhães DV. Development of a system to treat and online monitor photodynamic therapy of skin cancer using PpIX near-infrared fluorescence. Photodiagnosis Photodyn Ther 2020; 30:101680. [DOI: 10.1016/j.pdpdt.2020.101680] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 01/15/2020] [Accepted: 01/27/2020] [Indexed: 11/28/2022]
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22
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Ihara D, Hazama H, Nishimura T, Morita Y, Awazu K. Fluorescence detection of deep intramucosal cancer excited by green light for photodynamic diagnosis using protoporphyrin IX induced by 5-aminolevulinic acid: an ex vivo study. JOURNAL OF BIOMEDICAL OPTICS 2020; 25:1-13. [PMID: 32129029 PMCID: PMC7053433 DOI: 10.1117/1.jbo.25.6.063809] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Accepted: 02/18/2020] [Indexed: 05/04/2023]
Abstract
SIGNIFICANCE The diagnostic depth of photodynamic diagnosis (PDD) for gastric cancer with protoporphyrin IX (PpIX) is limited, which leads to missing intramucosal cancers in screening and surgery. AIM The reason is that the excitation light, whose wavelength is determined by the highest absorption peak of PpIX (∼405 nm), is strongly attenuated by mucosal tissues. We investigated an excitation wavelength that can extend the diagnostic depth of PpIX fluorescence at the mucosal subsurface. APPROACH By calculating the depth-dependent intensity of the excitation light in porcine gastric mucosa for each wavelength, relationships among the wavelength, fluorophore depth, and fluorescence intensity were assessed and fluorescence images of PpIX pellets located at different fluorophore depths were compared experimentally by changing the excitation wavelength. RESULTS The numerical calculation showed that a 505-nm excitation light provided the highest fluorescence intensities at a fluorophore depth deeper than 1.1 mm. In the fluorescence observation, the fluorescence intensities at fluorophore depths of 0 and 1.0 mm at 405 nm were 5.4 × 103 and 1.0 × 103 arb. units, whereas those at 505 nm were 5.3 × 101 and 1.9 × 102 arb. units, respectively. CONCLUSION The experimental results suggest that the diagnosis depth of PDD with PpIX for intramucosal cancer can be extended by 505-nm excitation light.
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Affiliation(s)
- Daisuke Ihara
- Osaka University, Graduate School of Engineering, Suita, Japan
- Address all correspondence to Daisuke Ihara, E-mail: ; Takahiro Nishimura, E-mail:
| | - Hisanao Hazama
- Osaka University, Graduate School of Engineering, Suita, Japan
| | - Takahiro Nishimura
- Osaka University, Graduate School of Engineering, Suita, Japan
- Address all correspondence to Daisuke Ihara, E-mail: ; Takahiro Nishimura, E-mail:
| | - Yoshinori Morita
- Kobe University Graduate School of Medicine, Department of Gastroenterology, Kobe, Japan
- Kobe University, International Clinical Cancer Research Center, Department of Gastroenterology, Kobe, Japan
| | - Kunio Awazu
- Osaka University, Graduate School of Engineering, Suita, Japan
- Osaka University, Graduate School of Frontier Biosciences, Suita, Japan
- Osaka University, Global Center for Medical Engineering and Informatics, Suita, Japan
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23
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Dijkstra BM, Jeltema HRJR, Kruijff S, Groen RJM. The application of fluorescence techniques in meningioma surgery-a review. Neurosurg Rev 2019; 42:799-809. [PMID: 30519770 PMCID: PMC6821664 DOI: 10.1007/s10143-018-01062-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 11/11/2018] [Accepted: 11/23/2018] [Indexed: 12/27/2022]
Abstract
Surgical resections of meningiomas, the most common intracranial tumor in adults, can only be curative if radical resection is achieved. Potentially, the extent of resection could be improved, especially in complex and/or high-grade meningiomas by fluorescence-guided surgery using 5-aminolevulinic acid (5-ALA), indocyanine green (ICG), or fluorescein. This review aims to summarize and evaluate these fluorescence-guided meningioma surgery techniques. PubMed and Embase were searched for relevant articles. Additionally, we checked reference lists for further studies. Forty-eight articles were included in the final analysis. 5-ALA fluoresced with varying sensitivity and selectivity in meningiomas and in invaded bone and dura mater. Although ICG was mainly applied for video angiography, one report shows tumor fluorescence 18-28 h post-ICG injection. Lastly, the use of fluorescein could aid in the identification of tumor remnants; however, detection of dural tail is highly questionable. Fluorescence-guided meningioma surgery should be a reliable, highly specific, and sensitive technique. Despite numerous studies reporting the use of fluorescent dyes, currently, there is no evidence that these tools improve the radical resection rate and long-term recurrence-free outcome in meningioma surgery without neurological deficits. Evidence regarding the effectiveness and increased safety of resection after the application of these fluorophores is currently lacking. Future research should focus on the development of a meningioma-targeted, highly sensitive, and specific fluorophore.
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Affiliation(s)
- Bianca M Dijkstra
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands
| | - Hanne-Rinck J R Jeltema
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands
| | - Schelto Kruijff
- Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Rob J M Groen
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30.001, 9700 RB, Groningen, The Netherlands.
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24
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Lee JYK, Cho SS, Stummer W, Tanyi JL, Vahrmeijer AL, Rosenthal E, Smith B, Henderson E, Roberts DW, Lee A, Hadjipanayis CG, Bruce JN, Newman JG, Singhal S. Review of clinical trials in intraoperative molecular imaging during cancer surgery. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-8. [PMID: 31808327 PMCID: PMC7005471 DOI: 10.1117/1.jbo.24.12.120901] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 11/15/2019] [Indexed: 05/14/2023]
Abstract
Most solid cancers are treated by surgical resections to reduce the burden of disease. Surgeons often face the challenge of detecting small areas of residual neoplasm after resection or finding small primary tumors for the initial resection. Intraoperative molecular imaging (IMI) is an emerging technology with the potential to dramatically improve cancer surgery operations by allowing surgeons to better visualize areas of neoplasm using fluorescence imaging. Over the last two years, two molecular optical contrast agents received U.S. Food and Drug Administration approval, and several more drugs are now on the horizon. Thus a conference was organized at the University of Pennsylvania to bring together oncologic surgeons from different specialties to discuss the current clinical status of IMI trials with a specific focus on phase 2 and phase 3 studies. In addition, phase 1 and experimental trials were also discussed briefly, to highlight other novel techniques. Our review summarizes the discussions from the conference and delves into the types of cancers discussed, different contrast agents in human trials, and the clinical value being studied.
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Affiliation(s)
- John Y. K. Lee
- University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States
- Address all correspondence to John Y. K. Lee, E-mail:
| | - Steve S. Cho
- University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States
| | | | - Janos L. Tanyi
- University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States
| | | | - Eben Rosenthal
- Stanford University, School of Medicine, California, United States
| | - Barbara Smith
- Harvard University, School of Medicine, Boston, Massachusetts, United States
| | - Eric Henderson
- Dartmouth College, School of Medicine, Hanover, New Hampshire, United States
- Dartmouth College, School of Engineering, Hanover, New Hampshire, United States
| | - David W. Roberts
- Dartmouth College, School of Medicine, Hanover, New Hampshire, United States
- Dartmouth College, School of Engineering, Hanover, New Hampshire, United States
| | - Amy Lee
- University of Washington, School of Medicine, Seattle, Washington, United States
| | | | - Jeffrey N. Bruce
- Columbia University, School of Medicine, New York, United States
| | - Jason G. Newman
- University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States
| | - Sunil Singhal
- University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States
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25
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Xu J, Yu S, Wang X, Qian Y, Wu W, Zhang S, Zheng B, Wei G, Gao S, Cao Z, Fu W, Xiao Z, Lu W. High Affinity of Chlorin e6 to Immunoglobulin G for Intraoperative Fluorescence Image-Guided Cancer Photodynamic and Checkpoint Blockade Therapy. ACS NANO 2019; 13:10242-10260. [PMID: 31397999 DOI: 10.1021/acsnano.9b03466] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cancer photodynamic therapy (PDT) represents an attractive local treatment in combination with immunotherapy. Successful cancer PDT relies on image guidance to ensure the treatment accuracy. However, existing nanotechnology for co-delivery of photosensitizers and image contrast agents slows the clearance of PDT agents from the body and causes a disparity between the release profiles of the imaging and PDT agents. We have found that the photosensitizer Chlorin e6 (Ce6) is inherently bound to immunoglobulin G (IgG) in a nanomolarity range of affinity. Ce6 and IgG self-assemble to form the nanocomplexes termed Chloringlobulin (Chlorin e6 + immunoglobulin G). Chloringlobulin enhances the Ce6 concentration in the tumor without changing its elimination half-life in blood. Utilizing the immune checkpoint inhibitor antiprogrammed death ligand 1 (PD-L1) (αPD-L1) to prepare αPD-L1 Chloringlobulin, we have demonstrated a combination of Ce6-based red-light fluorescence image-guided surgery, stereotactic PDT, and PD-L1 blockade therapy of mice bearing orthotopic glioma. In mice bearing an orthotopic colon cancer model, we have prepared another Chloringlobulin that allows intraoperative fluorescence image-guided PDT in combination with PD-L1 and cytotoxic T lymphocyte antigen 4 (CTLA-4) dual checkpoint blockade therapy. The Chloringlobulin technology shows great potential for clinical translation of combinatorial intraoperative fluorescence image-guided PDT and checkpoint blockade therapy.
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Affiliation(s)
- Jiaojiao Xu
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
| | - Sheng Yu
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
| | - Xiaodong Wang
- Department of Biomedical and Pharmaceutical Sciences, College of Pharmacy , The University of Rhode Island , Kingston , Rhode Island 02881 , United States
| | - Yuyi Qian
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
| | - Weishu Wu
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
| | - Sihang Zhang
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
| | - Binbin Zheng
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
| | - Guoguang Wei
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
| | - Shuai Gao
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
| | - Zhonglian Cao
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
| | - Wei Fu
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
| | - Zeyu Xiao
- Department of Pharmacology and Chemical Biology, & Clinical and Fundamental Research Center, Institute of Molecular Medicine, Renji Hospital , Shanghai Jiao Tong University School of Medicine , Shanghai 200025 , China
| | - Wei Lu
- Minhang Hospital & School of Pharmacy, Key Laboratory of Smart Drug Delivery Ministry of Education, State Key Laboratory of Molecular Engineering of Polymers , Fudan University , Shanghai 201199 , China
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26
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Georges JF, Valeri A, Wang H, Brooking A, Kakareka M, Cho SS, Al-Atrache Z, Bamimore M, Osman H, Ifrach J, Yu S, Li C, Appelt D, Lee JYK, Nakaji P, Brill K, Yocom S. Delta-Aminolevulinic Acid-Mediated Photodiagnoses in Surgical Oncology: A Historical Review of Clinical Trials. Front Surg 2019; 6:45. [PMID: 31555659 PMCID: PMC6737001 DOI: 10.3389/fsurg.2019.00045] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 07/17/2019] [Indexed: 12/11/2022] Open
Abstract
Fluorescence imaging is an emerging clinical technique for real-time intraoperative visualization of tumors and their boundaries. Though multiple fluorescent contrast agents are available in the basic sciences, few fluorescence agents are available for clinical use. Of the clinical fluorophores, delta aminolevulinic acid (5ALA) is unique for generating visible wavelength tumor-specific fluorescence. In 2017, 5ALA was FDA-approved for glioma surgery in the United States. Additionally, clinical studies suggest this agent may have utility in surgical subspecialties outside of neurosurgery. Data from dermatology, OB/GYN, urology, cardiothoracic surgery, and gastrointestinal surgery show 5ALA is helpful for intraoperative visualization of malignant tissues in multiple organ systems. This review summarizes data from English-language 5ALA clinical trials across surgical subspecialties. Imaging systems, routes of administration, dosing, efficacy, and related side effects are reviewed. We found that modified surgical microscopes and endoscopes are the preferred imaging devices. Systemic dosing across surgical specialties range between 5 and 30 mg/kg bodyweight. Multiple studies discussed potential for skin irritation with sun exposure, however this side effect is infrequently reported. Overall, 5ALA has shown high sensitivity for labeling malignant tissues and providing a means to visualize malignant tissue not apparent with standard operative light sources.
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Affiliation(s)
- Joseph F Georges
- Department of Neurosurgery, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States.,Department of Neurosurgery, Cooper University Healthcare, Philadelphia, PA, United States
| | - Amber Valeri
- Department of Neurosurgery, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States.,Department of Neurosurgery, Cooper University Healthcare, Philadelphia, PA, United States
| | - Huan Wang
- School of Medicine, Cooper Medical School of Rowan University, Camden, NJ, United States
| | - Aaron Brooking
- Department of Neurosurgery, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States.,Department of Neurosurgery, Cooper University Healthcare, Philadelphia, PA, United States
| | - Michael Kakareka
- Department of Neurosurgery, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States.,Department of Neurosurgery, Cooper University Healthcare, Philadelphia, PA, United States
| | - Steve S Cho
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States.,Department of Neurosurgery, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Zein Al-Atrache
- School of Medicine, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States
| | - Michael Bamimore
- School of Medicine, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States
| | - Hany Osman
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, United States
| | - Joseph Ifrach
- School of Medicine, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States
| | - Si Yu
- School of Medicine, Cooper Medical School of Rowan University, Camden, NJ, United States
| | - Carrie Li
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Denah Appelt
- Department of Neurosurgery, Philadelphia College of Osteopathic Medicine, Philadelphia, PA, United States
| | - John Y K Lee
- Department of Neurosurgery, Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Peter Nakaji
- Department of Neurosurgery, St. Joseph's Hospital and Medical Center, Barrow Neurological Institute, Phoenix, AZ, United States
| | - Kristin Brill
- Department of Surgery, MD Anderson Cancer Center at Cooper Health Systems, Camden, NJ, United States
| | - Steven Yocom
- Department of Neurosurgery, Cooper University Healthcare, Philadelphia, PA, United States
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27
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McNicholas K, MacGregor MN, Gleadle JM. In order for the light to shine so brightly, the darkness must be present-why do cancers fluoresce with 5-aminolaevulinic acid? Br J Cancer 2019; 121:631-639. [PMID: 31406300 PMCID: PMC6889380 DOI: 10.1038/s41416-019-0516-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 05/23/2019] [Accepted: 06/14/2019] [Indexed: 02/07/2023] Open
Abstract
Photodynamic diagnosis and therapy have emerged as a promising tool in oncology. Using the visible fluorescence from photosensitisers excited by light, clinicians can both identify and treat tumour cells in situ. Protoporphyrin IX, produced in the penultimate step of the haem synthesis pathway, is a naturally occurring photosensitiser that visibly fluoresces when exposed to light. This fluorescence is enhanced considerably by the exogenous administration of the substrate 5-aminolaevulinic acid (5-ALA). Significantly, 5-ALA-induced protoporphyrin IX accumulates preferentially in cancer cells, and this enhanced fluorescence has been harnessed for the detection and photodynamic treatment of brain, skin and bladder tumours. However, surprisingly little is known about the mechanistic basis for this phenomenon. This review focuses on alterations in the haem pathway in cancer and considers the unique features of the cancer environment, such as altered glucose metabolism, oncogenic mutations and hypoxia, and their potential effects on the protoporphyrin IX phenomenon. A better understanding of why cancer cells fluoresce with 5-ALA would improve its use in cancer diagnostics and therapies.
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Affiliation(s)
- Kym McNicholas
- Department of Renal Medicine, Flinders Medical Centre, Flinders University, Bedford Park, SA, 5042, Australia. .,College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Australia.
| | - Melanie N MacGregor
- Future Industries Institute, School of Engineering, University of South Australia, Adelaide, SA, 5095, Australia
| | - Jonathan M Gleadle
- Department of Renal Medicine, Flinders Medical Centre, Flinders University, Bedford Park, SA, 5042, Australia.,College of Medicine and Public Health, Flinders University, Bedford Park, SA, 5042, Australia
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28
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Boschi A, Della Puppa A. 5-ALA fluorescence on tumors different from malignant gliomas. Review of the literature and our experience. J Neurosurg Sci 2019; 63:661-669. [PMID: 31355622 DOI: 10.23736/s0390-5616.19.04766-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Fluorescence guided surgery with 5-aminolevulinic acid (5-ALA) is a well-established technique for improving resection of malignant cerebral glioma. In recent years, this technique is being increasingly applied off label to other brain tumor entities such as Low-grade glioma, meningioma, metastases, lymphoma and other central nervous system tumors. In this paper We collected all the data of 5-ALA guided surgery in "not malignant glioma" in literature compared to our experience. EVIDENCE ACQUISITION We searched the PubMed/Medline database all clinical series reporting 5-ALA guided-surgery in not malignant glioma. We reviewed all data also showing our experience. EVIDENCE SYNTHESIS Fluorescence guided surgery with 5-ALA might be helpful not only in high-grade glioma but also in other brain tumor especially in Low grade glioma with a suspect of anaplastic spot, meningioma with bone invasion or parenchymal infiltration, ependymoma, lymphoma and pediatric tumors. CONCLUSIONS Due to the relatively few number or clinical studies, prospective clinical trials are needed to increase the overall level of evidence concerning the usage of 5-ALA in CNS tumors different from high-grade glioma. Furthermore, a greater us of new tools such as, spectroscopy or confocal microscope or the use of combination of other fluorescence could make more effective this technique.
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Affiliation(s)
- Andrea Boschi
- Department of Neurosurgery, Careggi Hospital, University of Florence, Florence, Italy
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Wei L, Fujita Y, Sanai N, Liu JTC. Toward Quantitative Neurosurgical Guidance With High-Resolution Microscopy of 5-Aminolevulinic Acid-Induced Protoporphyrin IX. Front Oncol 2019; 9:592. [PMID: 31334117 PMCID: PMC6616084 DOI: 10.3389/fonc.2019.00592] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 06/17/2019] [Indexed: 12/13/2022] Open
Abstract
Low-power fluorescence microscopy of 5-ALA-induced PpIX has emerged as a valuable intraoperative imaging technology for improving the resection of malignant gliomas. However, current fluorescence imaging tools are not highly sensitive nor quantitative, which limits their effectiveness for optimizing operative decisions near the surgical margins of gliomas, in particular non-enhancing low-grade gliomas. Intraoperative high-resolution optical-sectioning microscopy can potentially serve as a valuable complement to low-power fluorescence microscopy by providing reproducible quantification of tumor parameters at the infiltrative margins of diffuse gliomas. In this forward-looking perspective article, we provide a brief discussion of recent technical advancements, pilot clinical studies, and our vision of the future adoption of handheld optical-sectioning microscopy at the final stages of glioma surgeries to enhance the extent of resection. We list a number of challenges for clinical acceptance, as well as potential strategies to overcome such obstacles for the surgical implementation of these in vivo microscopy techniques.
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Affiliation(s)
- Linpeng Wei
- Department of Mechanical Engineering, University of Washington, Seattle, WA, United States
| | - Yoko Fujita
- Department of Neurological Surgery, Barrow Neurological Institute, Phoenix, AZ, United States
| | - Nader Sanai
- Department of Neurological Surgery, Barrow Neurological Institute, Phoenix, AZ, United States
| | - Jonathan T C Liu
- Department of Mechanical Engineering, University of Washington, Seattle, WA, United States.,Department of Pathology, University of Washington School of Medicine, Seattle, WA, United States
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30
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Cho SS, Salinas R, Lee JYK. Indocyanine-Green for Fluorescence-Guided Surgery of Brain Tumors: Evidence, Techniques, and Practical Experience. Front Surg 2019; 6:11. [PMID: 30915339 PMCID: PMC6422908 DOI: 10.3389/fsurg.2019.00011] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Accepted: 02/19/2019] [Indexed: 01/10/2023] Open
Abstract
The primary treatment for brain tumors often involves surgical resection for diagnosis, relief of mass effect, and prolonged survival. In neurosurgery, it is of utmost importance to achieve maximal safe resection while minimizing iatrogenic neurologic deficit. Thus, neurosurgeons often rely on extra tools in the operating room, such as neuronavigation, intraoperative magnetic resonance imaging, and/or intraoperative rapid pathology. However, these tools can be expensive, not readily available, time-consuming, and/or inaccurate. Recently, fluorescence-guided surgery has emerged as a cost-effective method to accurately visualize neoplastic areas in real-time to guide resection. Currently, 5-aminolevulinic-acid (5-ALA) remains the only fluorophore that has been approved specifically for fluorescence-guided tumor resection. Its use has demonstrated improved resection rates and prolonged progression-free survival. However, protoporphyrin-IX, the metabolic product of 5-ALA that accumulates in neoplastic cells, fluoresces in the visible-light range, which suffers from limited tissue penetration and significant auto-fluorescence. Near-infrared fluorescence, on the other hand, overcomes these problems with ease. Since 2012, researchers at our institution have developed a novel technique using indocyanine-green, which is a well-known near-infrared fluorophore used traditionally for angiography. This Second-Window-ICG (SWIG) technique takes advantage of the increased endothelial permeability in peritumoral tissue, which allows indocyanine-green to accumulate in these areas for intraoperative visualization of the tumor. SWIG has demonstrated utility in gliomas, meningiomas, metastases, pituitary adenomas, chordomas, and craniopharyngiomas. The main benefits of SWIG stem from its highly sensitive detection of neoplastic tissue in a wide variety of intracranial pathologies in real-time, which can help neurosurgeons both during surgical resections and in stereotactic biopsies. In this review of this novel technique, we summarize the development and mechanism of action of SWIG, provide evidence for its benefits, and discuss its limitations. Finally, for those interested in near-infrared fluorescence-guided surgery, we provide suggestions for maximizing the benefits while minimizing the limitations of SWIG based on our own experience thus far.
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Affiliation(s)
- Steve S Cho
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, United States.,Department of Neurosurgery at the Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - Ryan Salinas
- Department of Neurosurgery at the Hospital of the University of Pennsylvania, Philadelphia, PA, United States
| | - John Y K Lee
- Department of Neurosurgery at the Hospital of the University of Pennsylvania, Philadelphia, PA, United States
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31
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Wei L, Roberts DW, Sanai N, Liu JTC. Visualization technologies for 5-ALA-based fluorescence-guided surgeries. J Neurooncol 2018; 141:495-505. [PMID: 30554344 DOI: 10.1007/s11060-018-03077-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 12/10/2018] [Indexed: 01/27/2023]
Abstract
INTRODUCTION 5-ALA-based fluorescence-guided surgery has been shown to be a safe and effective method to improve intraoperative visualization and resection of malignant gliomas. However, it remains ineffective in guiding the resection of lower-grade, non-enhancing, and deep-seated tumors, mainly because these tumors do not produce detectable fluorescence with conventional visualization technologies, namely, wide-field (WF) surgical microscopy. METHODS We describe some of the main factors that limit the sensitivity and accuracy of conventional WF surgical microscopy, and then provide a survey of commercial and research prototypes being developed to address these challenges, along with their principles, advantages and disadvantages, as well as the current status of clinical translation for each technology. We also provide a neurosurgical perspective on how these visualization technologies might best be implemented for guiding glioma surgeries in the future. RESULTS Detection of PpIX expression in low-grade gliomas and at the infiltrative margins of all gliomas has been achieved with high-sensitivity probe-based visualization techniques. Deep-tissue PpIX imaging of up to 5 mm has also been achieved using red-light illumination techniques. Spectroscopic approaches have enabled more accurate quantification of PpIX expression. CONCLUSION Advancements in visualization technologies have extended the sensitivity and accuracy of conventional WF surgical microscopy. These technologies will continue to be refined to further improve the extent of resection in glioma patients using 5-ALA-induced fluorescence.
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Affiliation(s)
- Linpeng Wei
- Department of Mechanical Engineering, University of Washington, Seattle, WA, 98195, USA.
| | - David W Roberts
- Section of Neurosurgery, Dartmouth-Hitchcock Medical Center, Lebanon, NH, 03756, USA
- Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH, 03756, USA
- Thayer School of Engineering, Dartmouth College, Hanover, NH, 03755, USA
- Geisel School of Medicine, Dartmouth College, Hanover, NH, 03755, USA
| | - Nader Sanai
- Department of Neurological Surgery, Barrow Neurological Institute, Phoenix, AZ, 85013, USA
| | - Jonathan T C Liu
- Department of Mechanical Engineering, University of Washington, Seattle, WA, 98195, USA
- Department of Pathology, University of Washington, Seattle, WA, 98195, USA
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Optical Characterization of Neurosurgical Operating Microscopes: Quantitative Fluorescence and Assessment of PpIX Photobleaching. Sci Rep 2018; 8:12543. [PMID: 30135440 PMCID: PMC6105612 DOI: 10.1038/s41598-018-30247-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 07/25/2018] [Indexed: 01/01/2023] Open
Abstract
Protoporphyrin IX (PpIX) induced by 5-aminolevulinic acid (5-ALA) is increasingly used as a fluorescent marker for fluorescence-guided resection of malignant gliomas. Understanding how the properties of the excitation light source and PpIX fluorescence interact with the surgical microscope is critical for effective use of the fluorescence-guided tumor resection technique. In this study, we performed a detailed assessment of the intensity of the emitted blue light and white light and the light beam profile of clinical grade operating microscopes used for PpIX visualization. These measurements revealed both recognized fluorescence photobleaching limitations and unrecognized limitations that may alter quantitative observations of PpIX fluorescence obtained with the operating microscope with potential impact on research and clinical uses. We also evaluated the optical properties of a photostable fluorescent standard with an excitation-emission profile similar to PpIX. In addition, we measured the time-dependent dynamics of 5-ALA-induced PpIX fluorescence in an animal glioma model. Finally, we developed a ratiometric method for quantification of the PpIX fluorescence that uses the photostable fluorescent standard to normalize PpIX fluorescence intensity. This method increases accuracy and allows reproducible and direct comparability of the measurements from multiple samples.
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Stepp H, Stummer W. 5‐ALA in the management of malignant glioma. Lasers Surg Med 2018; 50:399-419. [DOI: 10.1002/lsm.22933] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Herbert Stepp
- LIFE Center and Department of UrologyUniversity Hospital of MunichFeodor‐Lynen‐Str. 1981377MunichGermany
| | - Walter Stummer
- Department of NeurosurgeryUniversity Clinic MünsterAlbert‐Schweitzer‐Campus 1, Gebäude A148149MünsterGermany
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Hyperspectral data processing improves PpIX contrast during fluorescence guided surgery of human brain tumors. Sci Rep 2017; 7:9455. [PMID: 28842674 PMCID: PMC5572708 DOI: 10.1038/s41598-017-09727-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 07/28/2017] [Indexed: 12/02/2022] Open
Abstract
Fluorescence guided surgery (FGS) using aminolevulinic-acid (ALA) induced protoporphyrin IX (PpIX) provides intraoperative visual contrast between normal and malignant tissue during resection of high grade gliomas. However, maps of the PpIX biodistribution within the surgical field based on either visual perception or the raw fluorescence emissions can be masked by background signals or distorted by variations in tissue optical properties. This study evaluates the impact of algorithmic processing of hyperspectral imaging acquisitions on the sensitivity and contrast of PpIX maps. Measurements in tissue-simulating phantoms showed that (I) spectral fitting enhanced PpIX sensitivity compared with visible or integrated fluorescence, (II) confidence-filtering automatically determined the lower limit of detection based on the strength of the PpIX spectral signature in the collected emission spectrum (0.014–0.041 μg/ml in phantoms), and (III) optical-property corrected PpIX estimates were more highly correlated with independent probe measurements (r = 0.98) than with spectral fitting alone (r = 0.91) or integrated fluorescence (r = 0.82). Application to in vivo case examples from clinical neurosurgeries revealed changes to the localization and contrast of PpIX maps, making concentrations accessible that were not visually apparent. Adoption of these methods has the potential to maintain sensitive and accurate visualization of PpIX contrast over the course of surgery.
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Sibai M, Fisher C, Veilleux I, Elliott JT, Leblond F, Roberts DW, Wilson BC. Preclinical evaluation of spatial frequency domain-enabled wide-field quantitative imaging for enhanced glioma resection. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:76007. [PMID: 28697235 PMCID: PMC5995142 DOI: 10.1117/1.jbo.22.7.076007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 06/21/2017] [Indexed: 05/19/2023]
Abstract
5-Aminolevelunic acid-induced protoporphyrin IX (PpIX) fluorescence-guided resection (FGR) enables maximum safe resection of glioma by providing real-time tumor contrast. However, the subjective visual assessment and the variable intrinsic optical attenuation of tissue limit this technique to reliably delineating only high-grade tumors that display strong fluorescence. We have previously shown, using a fiber-optic probe, that quantitative assessment using noninvasive point spectroscopic measurements of the absolute PpIX concentration in tissue further improves the accuracy of FGR, extending it to surgically curable low-grade glioma. More recently, we have shown that implementing spatial frequency domain imaging with a fluorescent-light transport model enables recovery of two-dimensional images of [PpIX], alleviating the need for time-consuming point sampling of the brain surface. We present first results of this technique modified for <italic<in vivo</italic< imaging on an RG2 rat brain tumor model. Despite the moderate errors in retrieving the absorption and reduced scattering coefficients in the subdiffusive regime of 14% and 19%, respectively, the recovered [PpIX] maps agree within 10% of the point [PpIX] values measured by the fiber-optic probe, validating its potential as an extension or an alternative to point sampling during glioma resection.
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Affiliation(s)
- Mira Sibai
- University of Toronto, Department of Medical Biophysics, Faculty of Medicine, Ontario, Canada
- University Health Network, Princess Margaret Cancer Center, Ontario, Canada
| | - Carl Fisher
- University of Toronto, Department of Medical Biophysics, Faculty of Medicine, Ontario, Canada
- University Health Network, Princess Margaret Cancer Center, Ontario, Canada
| | - Israel Veilleux
- University Health Network, Princess Margaret Cancer Center, Ontario, Canada
| | - Jonathan T. Elliott
- Dartmouth College, Thayer School of Engineering, New Hampshire, United States
| | - Frederic Leblond
- École Polytechnique De Montreal, Department of Engineering Physics, Québec, Canada
| | - David W. Roberts
- Dartmouth Hitchcock Medical Center, Department of Neurosurgery, New Hampshire, United States
| | - Brian C. Wilson
- University of Toronto, Department of Medical Biophysics, Faculty of Medicine, Ontario, Canada
- University Health Network, Princess Margaret Cancer Center, Ontario, Canada
- Address all correspondence to: Brian C. Wilson, E-mail:
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