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Kazempour H, Teymouri F, Khatami M, Hosseini SN. Computational modelling of the therapeutic outputs of photodynamic therapy on spheroid-on-chip models. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2024; 258:112960. [PMID: 38991293 DOI: 10.1016/j.jphotobiol.2024.112960] [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: 03/02/2024] [Revised: 05/27/2024] [Accepted: 06/17/2024] [Indexed: 07/13/2024]
Abstract
Photodynamic therapy (PDT) is a medical radio chemotherapeutic method that uses light, photosensitizing agents, and oxygen to produce cytotoxic compounds, which eliminate malignant cells. Recently, Microfluidic systems have been used to analyse photosensitizers (PSs) due to their potential to replicate in vivo environments. While prior studies have established a strong correlation between reacted singlet oxygen concentration and PDT-induced cellular death, the effects that the ambient fluid flow might have on the concentration of oxygen and PS have been disregarded in many, which limits the reliability of the results. Herein, we coupled the transport of oxygen and PS throughout the ambient medium and within the spheroidal multicellular aggregate to initially study the profiles of oxygen and PS concentration alongside PDT-induced cellular death throughout the spheroid before and after radiation. The attained results indicate that the PDT-induced cellular death initiates on the surface of the spheroids and subsequently spreads to the neighbouring regions, which is in great accordance with experimental results. Afterward, the effects that drug-light interval (DLI), fluence rate, PS composition, microchannel height, and inlet flow rate have on the therapeutic outcomes are studied. The findings show that adequate DLI is critical to ensure uniform distribution of PS throughout the medium, and a value of 5 h was found to be sufficient. The composition of PS is critical, as ALA-PpIX induces earlier cell death but accelerates oxygen consumption, especially in the outer layers, depriving the inner layers of oxygen necessary for PDT, which in turn disrupts and prolongs the exposure time compared to mTHPC and Photofrin. Despite the fluence rate directly influencing the singlet oxygen generation rate, increasing the fluence rate by 189 mW/cm2 would not significantly benefit us. Microwell height and inlet flow rate involve competing phenomena-increasing height or decreasing flow reduces oxygen supply and increases PS "washout" and its concentration.
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Affiliation(s)
- Hossein Kazempour
- Chemical and Petroleum Engineering Department, Sharif University of Technology, Tehran, Iran
| | - Fatemeh Teymouri
- Chemical and Petroleum Engineering Department, Sharif University of Technology, Tehran, Iran
| | - Maryam Khatami
- Research and Production Complex, Pasteur Institute of Iran, Tehran, Iran
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Finlayson L, McMillan L, Suveges S, Steele D, Eftimie R, Trucu D, Brown CTA, Eadie E, Hossain-Ibrahim K, Wood K. Simulating photodynamic therapy for the treatment of glioblastoma using Monte Carlo radiative transport. JOURNAL OF BIOMEDICAL OPTICS 2024; 29:025001. [PMID: 38322729 PMCID: PMC10846422 DOI: 10.1117/1.jbo.29.2.025001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 01/16/2024] [Accepted: 01/17/2024] [Indexed: 02/08/2024]
Abstract
Significance Glioblastoma (GBM) is a rare but deadly form of brain tumor with a low median survival rate of 14.6 months, due to its resistance to treatment. An independent simulation of the INtraoperative photoDYnamic therapy for GliOblastoma (INDYGO) trial, a clinical trial aiming to treat the GBM resection cavity with photodynamic therapy (PDT) via a laser coupled balloon device, is demonstrated. Aim To develop a framework providing increased understanding for the PDT treatment, its parameters, and their impact on the clinical outcome. Approach We use Monte Carlo radiative transport techniques within a computational brain model containing a GBM to simulate light path and PDT effects. Treatment parameters (laser power, photosensitizer concentration, and irradiation time) are considered, as well as PDT's impact on brain tissue temperature. Results The simulation suggests that 39% of post-resection GBM cells are killed at the end of treatment when using the standard INDYGO trial protocol (light fluence = 200 J / cm 2 at balloon wall) and assuming an initial photosensitizer concentration of 5 μ M . Increases in treatment time and light power (light fluence = 400 J / cm 2 at balloon wall) result in further cell kill but increase brain cell temperature, which potentially affects treatment safety. Increasing the p hotosensitizer concentration produces the most significant increase in cell kill, with 61% of GBM cells killed when doubling concentration to 10 μ M and keeping the treatment time and power the same. According to these simulations, the standard trial protocol is reasonably well optimized with improvements in cell kill difficult to achieve without potentially dangerous increases in temperature. To improve treatment outcome, focus should be placed on improving the photosensitizer. Conclusions With further development and optimization, the simulation could have potential clinical benefit and be used to help plan and optimize intraoperative PDT treatment for GBM.
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Affiliation(s)
- Louise Finlayson
- SUPA, University of St Andrews, School of Physics and Astronomy, St Andrews, United Kingdom
| | - Lewis McMillan
- SUPA, University of St Andrews, School of Physics and Astronomy, St Andrews, United Kingdom
| | - Szabolcs Suveges
- University of Dundee, Division of Mathematics, Dundee, United Kingdom
| | - Douglas Steele
- University of Dundee, Medical School, Division Imaging Science and Technology, Dundee, United Kingdom
| | - Raluca Eftimie
- Université de Bourgogne Franche-Comté, Laboratoire Mathématiques de Besançon, Besançon, France
| | - Dumitru Trucu
- University of Dundee, Division of Mathematics, Dundee, United Kingdom
| | | | - Ewan Eadie
- Ninewells Hospital, Photobiology Unit, Dundee, United Kingdom
| | - Kismet Hossain-Ibrahim
- University of Dundee, School of Medicine, Division Cellular and Molecular Medicine, Dundee, United Kingdom
- Ninewells Hospital and Medical School, Department of Neurosurgery, Dundee, United Kingdom
| | - Kenneth Wood
- SUPA, University of St Andrews, School of Physics and Astronomy, St Andrews, United Kingdom
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Zhou M, Yin Y, Zhao J, Zhou M, Bai Y, Zhang P. Applications of microalga-powered microrobots in targeted drug delivery. Biomater Sci 2023; 11:7512-7530. [PMID: 37877241 DOI: 10.1039/d3bm01095c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Over the past decade, researchers have proposed a new class of drug delivery systems, bio-hybrid micro-robots, designed with a variety of living cell-driven micro-robots that utilize the unique mobility of natural organisms (bacteria, cells, exosomes, etc.) to transport effective drugs. Microalgae are considered potential drug delivery carriers. Recent studies have shown that microalga-based drug delivery systems exhibit excellent biocompatibility. In addition, microalgae have a large surfactant area, phototaxis, oxygen production, and other characteristics, so they are used as a carrier for the treatment of bacterial infections, cancer, etc. This review summarizes the modification of microalgae including click chemistry and electrostatic adsorption, and can improve the drug loading efficiency through dehydration and hydration strategies. The prepared microalgal drug delivery system can be targeted to different organs by different dosing methods or using external forces. Finally, it summarizes its antibacterial (gastritis, periodontitis, skin wound inflammation, etc.) and antitumor applications.
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Affiliation(s)
- Min Zhou
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Yannan Yin
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Jiuhong Zhao
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China.
| | - Mingyang Zhou
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
| | - Yanjie Bai
- Department of Stomatology, People's Hospital of Liaoning Province, Shenyang 110016, China.
| | - Peng Zhang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China.
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Yang W, Rastogi V, Sun H, Sharma D, Wilson BC, Hadfield RH, Zhu TC. Multispectral singlet oxygen luminescent dosimetry (MSOLD) for Photofrin-mediated Photodynamic Therapy. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2023; 12359:1235908. [PMID: 38419618 PMCID: PMC10901461 DOI: 10.1117/12.2652590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Direct detection of singlet-state oxygen ([1O2]) constitutes the holy grail dosimetric method for type II PDT, a goal that can be quantified using multispectral singlet oxygen dosimetry (MSOLD). However, the short lifetime and extremely weak nature of the singlet oxygen signal produced has given rise to a need to improve MSOLD signal-to-noise ratio. This study examines methods for optimizing MSOLD signal acquisition, specifically employing an orthogonal arrangement between detection and PDT treatment light, consisting of two fiber optics - connected to a 632-nm laser and an InGaAs detector respectively. Light collected by the InGaAs detector is then passed through a filter wheel, where spectral emission measurements are taken at 1200 nm, 1240 nm, 1250 nm, 1270 nm, and 1300 nm. The data, after fitting to the fluorescence background and a gaussian-fit for the singlet oxygen peak, is established for the background-subtracted singlet oxygen emission signal. The MSOLD signal is then compared with the singlet oxygen explicit dosimetry (SOED) results, based on direct measurements of in-vivo light fluence (rate), in-vivo Photofrin concentration, and tissue oxygenation concentration. This study focuses on validating the sensitivity and minimum detectability of MSOLD signal in various in-vitro conditions. Finally, the MSOLD device will be tested in Photofrin-mediated PDT for mice bearing Radiation-Induced Fibrosarcoma (RIF) tumors.
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Affiliation(s)
- Weibing Yang
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
| | - Vivek Rastogi
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
| | - Hongjing Sun
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
| | - Dvij Sharma
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
| | - Brian C. Wilson
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
| | | | - Timothy C. Zhu
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
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Hall Morales RD, Sun H, Hong Ong Y, Zhu TC. Validation of multispectral singlet oxygen luminescence dosimetry (MSOLD) for photofrin-mediated photodynamic therapy. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2022; 11940:119400J. [PMID: 35506009 PMCID: PMC9060571 DOI: 10.1117/12.2609937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Accurate dosimetry is crucial for the ongoing development and clinical study of photodynamic therapy (PDT). Current dosimetry standards range from less accurate methods involving measurement of only light fluence and photosensitizer concentration during treatment, to significantly improved methods such as singlet oxygen explicit dosimetry (SOED), a macroscopic model that includes an additional important parameter in its dosimetric calculations: ground-state oxygen concentration ([3O2]). However, neither of these models is a method of direct dosimetry. Multispectral singlet oxygen luminescence dosimetry (MSOLD) shows promise in this regard but requires significant improvement in signal quality and remains to be validated in a clinical setting. In this study, we validate a linearly increasing MSOLD signal with an InGaAs photodiode detector for increasing concentration (0 mg/kg to 200 mg/kg) in tissue-simulating phantoms containing photofrin, calculating a calibration curve based on 1270 nm peak-intensity signal and area under the curve for background-subtracted singlet oxygen emission. Additionally, we validate MSOLD against the current clinical dosimetry standard, SOED, through simultaneous measurement of SOED parameters and MSOLD signal for varying concentrations (50 μM - 300 μM). Finally, we investigate the effects of using very high gain amplification on InGaAs photodiode detectors to amplify the MSOLD signal for use in clinical models. We show that a calibration curve relating photosensitizer concentration (PS) and MSOLD signal can be established. Additionally, we demonstrate good correlation between MSOLD signal and SOED-calculated [1O2]rx. However, we show that when using high amplification on InGaAs photodiodes for long illumination times, the inherent instability in these detectors becomes apparent.
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Affiliation(s)
- Ryan D. Hall Morales
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
| | - Hongjing Sun
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
| | - Yi Hong Ong
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
| | - Timothy C. Zhu
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
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Kamanli AF, Çetinel G. Radiation mode and tissue thickness impact on singlet oxygen dosimetry methods for antimicrobial photodynamic therapy. Photodiagnosis Photodyn Ther 2021; 36:102483. [PMID: 34390880 DOI: 10.1016/j.pdpdt.2021.102483] [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: 02/08/2021] [Revised: 07/21/2021] [Accepted: 08/09/2021] [Indexed: 11/30/2022]
Abstract
The target of the presented study is to evaluate the performances of illumination modes on Photodynamic therapy (PDT) for different tissue depths. For this purpose, radiation-based super pulse and pulse illumination modes were investigated for antimicrobial PDT (AmPDT). Singlet oxygen luminescence level was measured from two different points. The first one was to appraise the light penetration depth effect on singlet oxygen luminescence level for various radiation modes. The second one explored the singlet oxygen luminescence dosimetry (SOLD) method from deeper photosensitizer accumulated tissue levels. Two main experiments were performed in this study. The singlet oxygen concentration was calculated with singlet oxygen explicit dosimetry (SOED) and SOLD methods for various tissue depths in these experiments. According to the results of the experiments, super pulse mode (SPM) provided relatively high Staphylococcus Aureus (S. aureus) cell death by 5-12%. The penetration depth was increased between 0.2 mm and 0.7 mm during the experiments. SOLD-based singlet oxygen detection system was utilized to detect singlet oxygen production levels from various tissue thicknesses to evaluate the system's usefulness for deeper infected tissues. It was observed that SPM was more effective than pulse mode radiation after a certain tissue depth (≤ 2 mm).
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Affiliation(s)
- Ali Furkan Kamanli
- Sakarya University of Applied Sciences, Faculty of Technology, Electrical and Electronics Engineering, Turkey.
| | - Gökçen Çetinel
- Sakarya University, Faculty of Engineering, Electrical and Electronics Engineering, Turkey
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Zhong Y, Huang S, Zheng C, Huang J, Li B, Han S, Xiao H, Wang Y, Shuai X. A light and hypoxia-activated nanodrug for cascade photodynamic-chemo cancer therapy. Biomater Sci 2021; 9:5218-5226. [PMID: 34169939 DOI: 10.1039/d1bm00660f] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Combination therapy provides significantly better outcomes than a single drug treatment and becomes an efficient strategy for cancer therapy at present. Owing to the advantages of improved drug bioavailability, decreased side effects, and drug codelivery properties, polymeric carrier-based nanodrugs show great application potential in combination therapy. In this study, a pH-responsive block polymer consisting of polyethylene glycol (mPEG) and poly(asparagyl diisopropylethylenediamine-co-phenylalanine) (P(Asp(DIP)-co-Phe)) is synthesized for drug delivery. The polymer self-assembles into nanovesicles and simultaneously encapsulates the hydrophilic hypoxia-activated prodrug tirapazamine (TPZ) and the hydrophobic photosensitizer dihydrogen porphin (chlorin e6, Ce6). The formed nanodrug can be triggered by near infrared irradiation to induce photodynamic therapy (PDT), resulting in a hypoxic tumor environment to activate the prodrug TPZ to achieve efficient chemotherapy. The cascade synergistic therapeutic effect is evaluated both in vitro and in vivo in a breast cancer mice model. This study reveals a potential strategy for efficient cancer therapy by using Ce6 and TPZ co-encapsulated nanovesicles.
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Affiliation(s)
- Yin Zhong
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, China.
| | - Si Huang
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, China.
| | - Chujie Zheng
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, China.
| | - Jinsheng Huang
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, China.
| | - Bo Li
- PCFM Lab of Ministry of Education, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Shisong Han
- PCFM Lab of Ministry of Education, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Hong Xiao
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, China.
| | - Yong Wang
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, China.
| | - Xintao Shuai
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, China. and PCFM Lab of Ministry of Education, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
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8
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Lu Y, Hu D, Ying W. A fast numerical method for oxygen supply in tissue with complex blood vessel network. PLoS One 2021; 16:e0247641. [PMID: 33635924 PMCID: PMC7909958 DOI: 10.1371/journal.pone.0247641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 02/10/2021] [Indexed: 11/20/2022] Open
Abstract
Angiogenesis plays an essential role in many pathological processes such as tumor growth, wound healing, and keloid development. Low oxygen level is the main driving stimulus for angiogenesis. In an animal tissue, the oxygen level is mainly determined by three effects—the oxygen delivery through blood flow in a refined vessel network, the oxygen diffusion from blood to tissue, and the oxygen consumption in cells. Evaluation of the oxygen field is usually the bottleneck in large scale modeling and simulation of angiogenesis and related physiological processes. In this work, a fast numerical method is developed for the simulation of oxygen supply in tissue with a large-scale complex vessel network. This method employs an implicit finite-difference scheme to compute the oxygen field. By virtue of an oxygen source distribution technique from vessel center lines to mesh points and a corresponding post-processing technique that eliminate the local numerical error induced by source distribution, square mesh with relatively large mesh sizes can be applied while sufficient numerical accuracy is maintained. The new method has computational complexity which is slightly higher than linear with respect to the number of mesh points and has a convergence order which is slightly lower than second order with respect to the mesh size. With this new method, accurate evaluation of the oxygen field in a fully vascularized tissue on the scale of centimeter becomes possible.
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Affiliation(s)
- Yuankai Lu
- School of Mathematical Sciences, Institute of Natural Sciences, and MOE-LSC, Shanghai Jiao Tong University, Shanghai, China
| | - Dan Hu
- School of Mathematical Sciences, Institute of Natural Sciences, and MOE-LSC, Shanghai Jiao Tong University, Shanghai, China
- * E-mail:
| | - Wenjun Ying
- School of Mathematical Sciences, Institute of Natural Sciences, and MOE-LSC, Shanghai Jiao Tong University, Shanghai, China
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Wang H, Guo Y, Wang C, Jiang X, Liu H, Yuan A, Yan J, Hu Y, Wu J. Light-controlled oxygen production and collection for sustainable photodynamic therapy in tumor hypoxia. Biomaterials 2020; 269:120621. [PMID: 33383301 DOI: 10.1016/j.biomaterials.2020.120621] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 11/10/2020] [Accepted: 12/17/2020] [Indexed: 12/15/2022]
Abstract
Hypoxia exists in most malignant tumors and often contributes to therapy resistance, especially for aerobic treatments such as photodynamic therapy (PDT) and radiotherapy. Here, we developed a novel light-controlled sustainable PDT in which light was used to help photosynthetic microorganisms (Chlorella) produce oxygen, and perfluorocarbon was used to enrich oxygen around the photosensitizer for sustained oxygen supply. After light stops, Chlorella further acts as an adjuvant to promote dendritic cell (DC) activation, promoting the antitumor immune response. We showed that sustainable PDT could continuously provide oxygen for photosensitizers and avoid PDT-induced local hypoxia. More importantly, sustainable PDT also promoted the activation of DCs and amplified the antitumor immune effects. Therefore, this novel strategy provides an effective but simple method for improving PDT in both tumor hypoxia and normoxia, and enhancing the antitumor immunity may be a new anti-resistance strategy for treating patients with advanced-stage cancer.
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Affiliation(s)
- Haoran Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Sciences of Nanjing University, Nanjing University, Nanjing, 210093, China
| | - Yunfei Guo
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Sciences of Nanjing University, Nanjing University, Nanjing, 210093, China
| | - Chao Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Sciences of Nanjing University, Nanjing University, Nanjing, 210093, China
| | - Xing Jiang
- School of Nursing, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Honghui Liu
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Sciences of Nanjing University, Nanjing University, Nanjing, 210093, China
| | - Ahu Yuan
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Sciences of Nanjing University, Nanjing University, Nanjing, 210093, China; Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China
| | - Jing Yan
- Department of Radiology, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, China
| | - Yiqiao Hu
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Sciences of Nanjing University, Nanjing University, Nanjing, 210093, China; Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China
| | - Jinhui Wu
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Sciences of Nanjing University, Nanjing University, Nanjing, 210093, China; Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing, 210023, China; Jiangsu Key Laboratory for Nano Technology, Nanjing University, Nanjing, 210093, China; Institute of Drug R&D, Nanjing University, Nanjing, 210093, China.
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Sheng T, Ong Y, Busch TM, Zhu TC. Reactive oxygen species explicit dosimetry to predict local tumor growth for Photofrin-mediated photodynamic therapy. BIOMEDICAL OPTICS EXPRESS 2020; 11:4586-4601. [PMID: 32923066 PMCID: PMC7449736 DOI: 10.1364/boe.393524] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 06/23/2020] [Accepted: 07/07/2020] [Indexed: 05/31/2023]
Abstract
Although photodynamic therapy (PDT) is an established modality for cancer treatment, current dosimetric quantities, such as light fluence and PDT dose, do not account for the differences in PDT oxygen consumption for different fluence rates (ϕ). A macroscopic model was adopted to calculate reactive oxygen species concentration ([ROS]rx) to predict Photofrin-PDT outcome in mice bearing radiation-induced fibrosarcoma (RIF) tumors. Singlet oxygen is the primary cytotoxic species for ROS, which is responsible for cell death in type II PDT, although other type I ROS is included in the parameters used in our model. Using a combination of fluences (50-250 J∕cm2) and ϕ (75 or 150 mW∕cm2), tumor regrowth rate, k, was determined for each condition by fitting the tumor volume versus time to V0 *exp(k*t). Treatment was delivered with a collimated laser beam of 1 cm diameter at 630 nm. Explicit dosimetry of light fluence rate on tissue surface, tissue oxygen concentration, tissue optical properties, and Photofrin concentration were performed. Light fluence rate at 3 mm depth (ϕ 3mm) was determined for the treatment volume based on Monte-Carlo simulations and measured tissue optical properties. Initial tissue oxygenation [3 O 2]0 was measured by an Oxylite oxygen probe before PDT and used to calculate [ROS]rx,calc. This value was compared to [ROS]rx,meas as calculated with the entire tissue oxygen spectrum [3 O 2](t), measured over the duration of light delivery for PDT. Cure index, CI = 1-k/kctr , for tumor growth up to 14 days after PDT was predicted by four dose metrics: light fluence, PDT dose, and [ROS]rx,calc, and [ROS]rx,meas. PDT dose was defined as the product of the time-integral of photosensitizer concentration and ϕ at a 3 mm tumor depth. These studies show that [ROS]rx,meas best correlates with CI and is an effective dosimetric quantity that can predict treatment outcome.
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Penjweini R, Roarke B, Alspaugh G, Gevorgyan A, Andreoni A, Pasut A, Sackett DL, Knutson JR. Single cell-based fluorescence lifetime imaging of intracellular oxygenation and metabolism. Redox Biol 2020; 34:101549. [PMID: 32403080 PMCID: PMC7217996 DOI: 10.1016/j.redox.2020.101549] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/15/2020] [Accepted: 04/20/2020] [Indexed: 12/02/2022] Open
Abstract
Oxidation-reduction chemistry is fundamental to the metabolism of all living organisms, and hence quantifying the principal redox players is important for a comprehensive understanding of cell metabolism in normal and pathological states. In mammalian cells, this is accomplished by measuring oxygen partial pressure (pO2) in parallel with free and enzyme-bound reduced nicotinamide adenine dinucleotide (phosphate) [H] (NAD(P)H) and flavin adenine dinucleotide (FAD, a proxy for NAD+). Previous optical methods for these measurements had accompanying problems of cytotoxicity, slow speed, population averaging, and inability to measure all redox parameters simultaneously. Herein we present a Förster resonance energy transfer (FRET)-based oxygen sensor, Myoglobin-mCherry, compatible with fluorescence lifetime imaging (FLIM)-based measurement of nicotinamide coenzyme state. This offers a contemporaneous reading of metabolic activity through real-time, non-invasive, cell-by-cell intracellular pO2 and coenzyme status monitoring in living cells. Additionally, this method reveals intracellular spatial heterogeneity and cell-to-cell variation in oxygenation and coenzyme states.
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Affiliation(s)
- Rozhin Penjweini
- Laboratory of Advanced Microscopy and Biophotonics, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), Building 10, Room 5D14, Bethesda, MD, 20892-1412, USA
| | - Branden Roarke
- Laboratory of Advanced Microscopy and Biophotonics, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), Building 10, Room 5D14, Bethesda, MD, 20892-1412, USA
| | - Greg Alspaugh
- Laboratory of Advanced Microscopy and Biophotonics, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), Building 10, Room 5D14, Bethesda, MD, 20892-1412, USA
| | - Anahit Gevorgyan
- Laboratory of Advanced Microscopy and Biophotonics, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), Building 10, Room 5D14, Bethesda, MD, 20892-1412, USA
| | - Alessio Andreoni
- Laboratory of Advanced Microscopy and Biophotonics, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), Building 10, Room 5D14, Bethesda, MD, 20892-1412, USA; Laboratory of Optical Neurophysiology, Department of Biochemistry and Molecular Medicine, University of California Davis, Tupper Hall, Davis, CA, 95616, USA
| | - Alessandra Pasut
- Laboratory of Angiogenesis and Vascular Metabolism, Center for Cancer Biology, VIB, Leuven Cancer Institute, KU Leuven, Leuven, 3000, Belgium
| | - Dan L Sackett
- Cytoskeletal Dynamics Group, Division of Basic and Translational Biophysics, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health (NIH), Building 9, Room 1E129, Bethesda, MD, 20892-0924, USA
| | - Jay R Knutson
- Laboratory of Advanced Microscopy and Biophotonics, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), Building 10, Room 5D14, Bethesda, MD, 20892-1412, USA.
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12
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Kamanli AF, Çetinel G. Comparison of pulse and super pulse radiation modes’ singlet oxygen production effect in antimicrobial photodynamic therapy (AmPDT). Photodiagnosis Photodyn Ther 2020; 30:101706. [DOI: 10.1016/j.pdpdt.2020.101706] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 02/08/2020] [Accepted: 02/28/2020] [Indexed: 10/24/2022]
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13
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Penjweini R, Kim MM, Ong YH, Zhu TC. 1O 2 determined from the measured PDT dose and 3O 2 predicts long-term response to Photofrin-mediated PDT. Phys Med Biol 2020; 65:03LT01. [PMID: 31751964 DOI: 10.1088/1361-6560/ab59f1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Photodynamic therapy (PDT) that employs the photochemical interaction of light, photosensitizer and oxygen is an established modality for the treatment of cancer. However, dosimetry for PDT is becoming increasingly complex due to the heterogeneous photosensitizer uptake by the tumor, and complicated relationship between the tissue oxygenation ([3O2]), interstitial light distribution, photosensitizer photobleaching and PDT effect. As a result, experts argue that the failure to realize PDT's true potential is, at least partly due to the complexity of the dosimetry problem. In this study, we examine the efficacy of singlet oxygen explicit dosimetry (SOED) based on the measurements of the interstitial light fluence rate distribution, changes of [3O2] and photosensitizer concentration during Photofrin-mediated PDT to predict long-term control rates of radiation-induced fibrosarcoma tumors. We further show how variation in tissue [3O2] between animals induces variation in the treatment response for the same PDT protocol. PDT was performed with 5 mg kg-1 Photofrin (a drug-light interval of 24 h), in-air fluence rates (ϕ air) of 50 and 75 mW cm-2 and in-air fluences from 225 to 540 J cm-2. The tumor regrowth was tracked for 90 d after the treatment and Kaplan-Meier analyses for local control rate were performed based on a tumor volume ⩽100 mm3 for the two dosimetry quantities of PDT dose and SOED. Based on the results, SOED allowed for reduced subject variation and improved treatment evaluation as compared to the PDT dose.
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Affiliation(s)
- Rozhin Penjweini
- Department of Radiation Oncology, University of Pennsylvania, School of Medicine, 3400 Civic Center Boulevard TRC 4W, Philadelphia, PA 19104, United States of America. Laboratory of Advanced Microscopy and Biophotonics, National Heart, Lung, and Blood Institute (NHLBI), National Institutes of Health (NIH), Building 10, Room 5D14, Bethesda, MD 20892-1412, United States of America
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14
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Sheng T, Ong Y, Guo W, Zhu TC. Reactive oxygen species explicit dosimetry to predict tumor growth for benzoporphyrin derivative-mediated vascular photodynamic therapy. JOURNAL OF BIOMEDICAL OPTICS 2020; 25:1-13. [PMID: 31912689 PMCID: PMC6952881 DOI: 10.1117/1.jbo.25.6.063805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 12/03/2019] [Indexed: 06/10/2023]
Abstract
Photodynamic therapy (PDT) is a well-established treatment modality for cancer and other malignant diseases; however, quantities such as light fluence and PDT dose do not fully account for all of the dynamic interactions between the key components involved. In particular, fluence rate (ϕ) effects, which impact the photochemical oxygen consumption rate, are not accounted for. In this preclinical study, reacted reactive oxygen species ([ROS]rx) was investigated as a dosimetric quantity for PDT outcome. The ability of [ROS]rx to predict the cure index (CI) of tumor growth, CI = 1 - k / kctr, where k and kctr are the growth rate of tumor under PDT study and the control tumor without PDT, respectively, for benzoporphyrin derivative (BPD)-mediated PDT, was examined. Mice bearing radiation-induced fibrosarcoma (RIF) tumors were treated with different in-air fluences (Φ = 22.5 to 166.7 J / cm2) and in-air fluence rates (ϕair = 75 to 250 mW / cm2) with a BPD dose of 1 mg / kg and a drug-light interval (DLI) of 15 min. Treatment was delivered with a collimated laser beam of 1-cm-diameter at 690 nm. Explicit measurements of in-air light fluence rate, tissue oxygen concentration, and BPD concentration were used to calculate for [ROS]rx. Light fluence rate at 3-mm depth (ϕ3 mm), determined based on Monte-Carlo simulations, was used in the calculation of [ROS]rx at the base of tumor. CI was used as an endpoint for three dose metrics: light fluence, PDT dose, and [ROS]rx. PDT dose was defined as the product of the time-integral of photosensitizer concentration and ϕ3 mm. Preliminary studies show that [ROS]rx best correlates with CI and is an effective dosimetric quantity that can predict treatment outcome. The threshold dose for [ROS]rx for vascular BPD-mediated PDT using DLI of 15 min is determined to be 0.26 mM and is about 3.8 times smaller than the corresponding value for conventional BPD-mediated PDT using DLI of 3 h.
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Affiliation(s)
- Tianqi Sheng
- University of Pennsylvania, Department of Radiation Oncology, Philadelphia, Pennsylvania, United States
| | - Yihong Ong
- University of Pennsylvania, Department of Radiation Oncology, Philadelphia, Pennsylvania, United States
| | - Wensheng Guo
- University of Pennsylvania, Department of Biostatistics and Epidemiology, Philadelphia, Pennsylvania, United States
| | - Timothy C. Zhu
- University of Pennsylvania, Department of Radiation Oncology, Philadelphia, Pennsylvania, United States
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15
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Ong YH, Dimofte A, Kim MM, Finlay JC, Sheng T, Singhal S, Cengel KA, Yodh AG, Busch TM, Zhu TC. Reactive Oxygen Species Explicit Dosimetry for Photofrin-mediated Pleural Photodynamic Therapy. Photochem Photobiol 2019; 96:340-348. [PMID: 31729774 DOI: 10.1111/php.13176] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 10/18/2019] [Indexed: 01/10/2023]
Abstract
Explicit dosimetry of treatment light fluence and implicit dosimetry of photosensitizer photobleaching are commonly used methods to guide dose delivery during clinical PDT. Tissue oxygen, however, is not routinely monitored intraoperatively even though it is one of the three major components of treatment. Quantitative information about in vivo tissue oxygenation during PDT is desirable, because it enables reactive oxygen species explicit dosimetry (ROSED) for prediction of treatment outcome based on PDT-induced changes in tumor oxygen level. Here, we demonstrate ROSED in a clinical setting, Photofrin-mediated pleural photodynamic therapy, by utilizing tumor blood flow information measured by diffuse correlation spectroscopy (DCS). A DCS contact probe was sutured to the pleural cavity wall after surgical resection of pleural mesothelioma tumor to monitor tissue blood flow (blood flow index) during intraoperative PDT treatment. Isotropic detectors were used to measure treatment light fluence and photosensitizer concentration. Blood-flow-derived tumor oxygen concentration, estimated by applying a preclinically determined conversion factor of 1.5 × 109 μMs cm-2 to the blood flow index, was used in the ROSED model to calculate the total reacted reactive oxygen species [ROS]rx. Seven patients and 12 different pleural sites were assessed and large inter- and intrapatient heterogeneities in [ROS]rx were observed although an identical light dose of 60 J cm-2 was prescribed to all patients.
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Affiliation(s)
- Yi Hong Ong
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA.,Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA
| | - Andreaa Dimofte
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Michele M Kim
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Jarod C Finlay
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Tianqi Sheng
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Sunil Singhal
- Division of Thoracic Surgery, Department of Surgery, University of Pennsylvania, Philadelphia, PA
| | - Keith A Cengel
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Arjun G Yodh
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA
| | - Theresa M Busch
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Timothy C Zhu
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
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16
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Izumoto A, Nishimura T, Hazama H, Ikeda N, Kajimoto Y, Awazu K. Singlet oxygen model evaluation of interstitial photodynamic therapy with 5-aminolevulinic acid for malignant brain tumor. JOURNAL OF BIOMEDICAL OPTICS 2019; 25:1-13. [PMID: 31838789 PMCID: PMC7013325 DOI: 10.1117/1.jbo.25.6.063803] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 11/26/2019] [Indexed: 05/09/2023]
Abstract
Interstitial photodynamic therapy (iPDT) with 5-aminolevulinic acid (ALA) is a possible alternative treatment for malignant brain tumors. Further evaluation is, however, required before it can be clinically applied. Computational simulation of the photophysical process in ALA-iPDT can offer a quantitative tool for understanding treatment outcomes, which depend on various variables related to clinical treatment conditions. We propose a clinical simulation method of ALA-iPDT for malignant brain tumors using a singlet oxygen (O12) model and O12 threshold to induce cell death. In this method, the amount of O12 generated is calculated using a photosensitizer photobleaching coefficient and O12 quantum yield, which have been measured in several previous studies. Results of the simulation using clinical magnetic resonance imaging data show the need to specify the insertion positions of cylindrical light diffusers and the level of light fluence. Detailed analysis with a numerical brain tumor model demonstrates that ALA-iPDT treatment outcomes depend on combinations of photobleaching and threshold values. These results indicate that individual medical procedures, including pretreatment planning and treatment monitoring, will greatly benefit from simulation of ALA-iPDT outcomes.
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Affiliation(s)
- Atsuki Izumoto
- Osaka University, Graduate School of Engineering, Suita, Japan
- Address all correspondence to Atsuki Izumoto, E-mail: ; Takahiro Nishimura, E-mail:
| | - Takahiro Nishimura
- Osaka University, Graduate School of Engineering, Suita, Japan
- Address all correspondence to Atsuki Izumoto, E-mail: ; Takahiro Nishimura, E-mail:
| | - Hisanao Hazama
- Osaka University, Graduate School of Engineering, Suita, Japan
| | - Naokado Ikeda
- Osaka Medical College, Department of Neurosurgery, Takatsuki, 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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17
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Carrier-free core–shell nanodrugs for synergistic two-photon photodynamic therapy of cervical cancer. J Colloid Interface Sci 2019; 535:84-91. [DOI: 10.1016/j.jcis.2018.09.095] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 09/23/2018] [Accepted: 09/26/2018] [Indexed: 01/09/2023]
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18
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Assessment of singlet oxygen dosimetry concepts in photodynamic therapy through computational modeling. Photodiagnosis Photodyn Ther 2018; 21:224-233. [DOI: 10.1016/j.pdpdt.2017.12.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 12/13/2017] [Accepted: 12/28/2017] [Indexed: 12/20/2022]
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19
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Ong YH, Kim MM, Huang Z, Zhu TC. Reactive Oxygen Species Explicit Dosimetry (ROSED) of a Type 1 Photosensitizer. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2018; 10476:104760V. [PMID: 29861531 PMCID: PMC5975967 DOI: 10.1117/12.2291385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Type I photodynamic therapy (PDT) is based on the use of photochemical reactions mediated through an interaction between a tumor-selective photosensitizer, photoexcitation with a specific wavelength of light, and production of reactive oxygen species (ROS). The goal of this study is to develop a model to calculate reactive oxygen species concentration ([ROS]rx) after Tookad®-mediated vascular PDT. Mice with radiation-induced fibrosarcoma (RIF) tumors were treated with different light fluence and fluence rate conditions. Explicit measurements of photosensitizer drug concentration were made via diffuse reflective absorption spectrum using a contact probe before and after PDT. Blood flow and tissue oxygen concentration over time were measured during PDT as a mean to validate the photochemical parameters for the ROSED calculation. Cure index was computed from the rate of tumor regrowth after treatment and was compared against three calculated dose metrics: total light fluence, PDT dose, reacted [ROS]rx. The tumor growth study demonstrates that [ROS]rx serves as a better dosimetric quantity for predicting treatment outcome, as a clinically relevant tumor growth endpoint.
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Affiliation(s)
- Yi Hong Ong
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104
| | - Michele M. Kim
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104
| | - Zheng Huang
- Center for Medical Photonics, Fujian Normal University, Fuzhou, China
| | - Timothy C. Zhu
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104
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20
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Li M, Thapa P, Rajaputra P, Bio M, Peer CJ, Figg WD, You Y, Woo S. Quantitative modeling of the dynamics and intracellular trafficking of far-red light-activatable prodrugs: implications in stimuli-responsive drug delivery system. J Pharmacokinet Pharmacodyn 2017; 44:521-536. [PMID: 28913666 DOI: 10.1007/s10928-017-9543-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2017] [Accepted: 09/08/2017] [Indexed: 12/14/2022]
Abstract
The combination of photodynamic therapy (PDT) with anti-tumor agents is a complimentary strategy to treat local cancers. We developed a unique photosensitizer (PS)-conjugated paclitaxel (PTX) prodrug in which a PS is excited by near-infrared wavelength light to site-specifically release PTX while generating singlet oxygen (SO) to effectively kill cancer cells with both PTX and SO. The aim of the present study was to identify the determinants influencing the combined efficacy of this light-activatable prodrug, especially the bystander killing effects from released PTX. Using PS-conjugated PTX as a model system, we developed a quantitative mathematical model describing the intracellular trafficking. Dynamics of the prodrug and the model predictions were verified with experimental data using human cancer cells in vitro. The sensitivity analysis suggested that parameters related to extracellular concentration of released PTX, prodrug uptake, target engagement, and target abundance are critical in determining the combined killing efficacy of the prodrug. We found that released PTX cytotoxicity was most sensitive to the retention time of the drug in extracellular space. Modulating drug internalization and conjugating the agents targeted to abundant receptors may provide a new strategy for maximizing the killing capacity of the far-red light-activatable prodrug system. These results provide guidance for the design of the PDT combination study in vivo and have implications for other stimuli-responsive drug delivery systems.
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Affiliation(s)
- Mengjie Li
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73117, USA
| | - Pritam Thapa
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73117, USA
| | - Pallavi Rajaputra
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73117, USA
| | - Moses Bio
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73117, USA
| | - Cody J Peer
- Clinical Pharmacology Program, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - William D Figg
- Clinical Pharmacology Program, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - Youngjae You
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73117, USA.
| | - Sukyung Woo
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73117, USA.
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21
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Hu XM, He L, Zhao Y. Dynamic model of vascular-targeted photodynamic therapy. Comput Methods Biomech Biomed Engin 2017; 20:1056-1065. [PMID: 28521517 DOI: 10.1080/10255842.2017.1331344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Vascular-targeted photodynamic therapy has shown efficiency in treating port wine stains. A dynamic model that incorporates blood flow, kinetic diffusion, oxygen and photosensitizer consumption and reaction, and light modulation is proposed to reveal the interactions among light, photosensitizer, and oxygen. Simulation results show that pulse light modulation synchronized with heartbeats hold the advantage of increased singlet oxygen accumulation, higher oxygen concentration and lower temperature. Meanwhile, constant light treatment is advantageous in terms of higher temperature, lower total oxygen concentration and singlet oxygen accumulation. Therefore, the optimized treatment protocol may involve a balance among the phototoxicity, hypoxia, and photothermolysis.
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Affiliation(s)
- Xiao-Ming Hu
- a Key Laboratory of Convergence Medical Engineering System and Healthcare Technology, the Ministry of Industry and Information Technology, School of Life Science , Beijing Institute of Technology , Beijing , China
| | - Linhuan He
- a Key Laboratory of Convergence Medical Engineering System and Healthcare Technology, the Ministry of Industry and Information Technology, School of Life Science , Beijing Institute of Technology , Beijing , China
| | - Yi Zhao
- b Department of Dermatology , Beijing Tsinghua Changgung Hospital, Medical Center, Tsinghua University , Beijing , China
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22
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Kim MM, Ghogare AA, Greer A, Zhu TC. On the in vivo photochemical rate parameters for PDT reactive oxygen species modeling. Phys Med Biol 2017; 62:R1-R48. [PMID: 28166056 PMCID: PMC5510640 DOI: 10.1088/1361-6560/62/5/r1] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Photosensitizer photochemical parameters are crucial data in accurate dosimetry for photodynamic therapy (PDT) based on photochemical modeling. Progress has been made in the last few decades in determining the photochemical properties of commonly used photosensitizers (PS), but mostly in solution or in vitro. Recent developments allow for the estimation of some of these photochemical parameters in vivo. This review will cover the currently available in vivo photochemical properties of photosensitizers as well as the techniques for measuring those parameters. Furthermore, photochemical parameters that are independent of environmental factors or are universal for different photosensitizers will be examined. Most photosensitizers discussed in this review are of the type II (singlet oxygen) photooxidation category, although type I photosensitizers that involve other reactive oxygen species (ROS) will be discussed as well. The compilation of these parameters will be essential for ROS modeling of PDT.
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Affiliation(s)
- Michele M Kim
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, United States of America. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, United States of America
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23
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Superiority of light synchronization modulation for the vascular targeted photodynamic therapy. Photodiagnosis Photodyn Ther 2017. [DOI: 10.1016/j.pdpdt.2017.01.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Qiu H, Kim MM, Penjweini R, Finlay JC, Busch TM, Wang T, Guo W, Cengel KA, Simone CB, Glatstein E, Zhu TC. A Comparison of Dose Metrics to Predict Local Tumor Control for Photofrin-mediated Photodynamic Therapy. Photochem Photobiol 2017; 93:1115-1122. [PMID: 28083883 DOI: 10.1111/php.12719] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 11/30/2016] [Indexed: 12/15/2022]
Abstract
This preclinical study examines light fluence, photodynamic therapy (PDT) dose and "apparent reacted singlet oxygen," [1 O2 ]rx , to predict local control rate (LCR) for Photofrin-mediated PDT of radiation-induced fibrosarcoma (RIF) tumors. Mice bearing RIF tumors were treated with in-air fluences (50-250 J cm-2 ) and in-air fluence rates (50-150 mW cm-2 ) at Photofrin dosages of 5 and 15 mg kg-1 and a drug-light interval of 24 h using a 630-nm, 1-cm-diameter collimated laser. A macroscopic model was used to calculate [1 O2 ]rx and PDT dose based on in vivo explicit dosimetry of the drug concentration, light fluence and tissue optical properties. PDT dose and [1 O2 ]rx were defined as a temporal integral of drug concentration and fluence rate, and singlet oxygen concentration consumed divided by the singlet oxygen lifetime, respectively. LCR was stratified for different dose metrics for 74 mice (66 + 8 control). Complete tumor control at 14 days was observed for [1 O2 ]rx ≥ 1.1 mm or PDT dose ≥1200 μm J cm-2 but cannot be predicted with fluence alone. LCR increases with increasing [1 O2 ]rx and PDT dose but is not well correlated with fluence. Comparing dosimetric quantities, [1 O2 ]rx outperformed both PDT dose and fluence in predicting tumor response and correlating with LCR.
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Affiliation(s)
- Haixia Qiu
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA.,Department of Laser Medicine, Chinese PLA General Hospital, Beijing, China
| | - Michele M Kim
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA.,Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA
| | - Rozhin Penjweini
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Jarod C Finlay
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Theresa M Busch
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Tianhao Wang
- Department of Biostatistics, University of Pennsylvania, Philadelphia, PA
| | - Wensheng Guo
- Department of Biostatistics, University of Pennsylvania, Philadelphia, PA
| | - Keith A Cengel
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Charles B Simone
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Eli Glatstein
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
| | - Timothy C Zhu
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA
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25
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Kim MM, Penjweini R, Zhu TC. Evaluation of singlet oxygen explicit dosimetry for predicting treatment outcomes of benzoporphyrin derivative monoacid ring A-mediated photodynamic therapy. JOURNAL OF BIOMEDICAL OPTICS 2017; 22:28002. [PMID: 28301655 PMCID: PMC5301138 DOI: 10.1117/1.jbo.22.2.028002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 01/24/2017] [Indexed: 05/19/2023]
Abstract
Existing dosimetric quantities do not fully account for the dynamic interactions between the key components of photodynamic therapy (PDT) or the varying PDT oxygen consumption rates for different fluence rates. Using a macroscopic model, reacted singlet oxygen ( [ O 2 1 ] rx ) was calculated and evaluated for its effectiveness as a dosimetric metric for PDT outcome. Mice bearing radiation-induced fibrosarcoma tumors were treated with benzoporphyrin derivative monoacid ring A (BPD) at a drug-light interval of 3 h with various in-air fluences (30 to 350 ?? J / cm 2 ) and in-air fluence rates (50 to 150 ?? mW / cm 2 ). Explicit measurements of BPD concentration and tissue optical properties were performed and used to calculate [ O 2 1 ] rx , photobleaching ratio, and PDT dose. For four mice, in situ measurements of O 2
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Affiliation(s)
- Michele M. Kim
- University of Pennsylvania, Department of Radiation Oncology, Philadelphia, Pennsylvania, United States
- University of Pennsylvania, Department of Physics and Astronomy, Philadelphia, Pennsylvania, United States
| | - Rozhin Penjweini
- University of Pennsylvania, Department of Radiation Oncology, Philadelphia, Pennsylvania, United States
| | - Timothy C. Zhu
- University of Pennsylvania, Department of Radiation Oncology, Philadelphia, Pennsylvania, United States
- Address all correspondences to: Timothy C. Zhu, E-mail:
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26
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Kim MM, Penjweini R, Gemmell NR, Veilleux I, McCarthy A, Buller GS, Hadfield RH, Wilson BC, Zhu TC. A Comparison of Singlet Oxygen Explicit Dosimetry (SOED) and Singlet Oxygen Luminescence Dosimetry (SOLD) for Photofrin-Mediated Photodynamic Therapy. Cancers (Basel) 2016; 8:E109. [PMID: 27929427 PMCID: PMC5187507 DOI: 10.3390/cancers8120109] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Revised: 11/14/2016] [Accepted: 11/28/2016] [Indexed: 11/16/2022] Open
Abstract
Accurate photodynamic therapy (PDT) dosimetry is critical for the use of PDT in the treatment of malignant and nonmalignant localized diseases. A singlet oxygen explicit dosimetry (SOED) model has been developed for in vivo purposes. It involves the measurement of the key components in PDT-light fluence (rate), photosensitizer concentration, and ground-state oxygen concentration ([³O₂])-to calculate the amount of reacted singlet oxygen ([¹O₂]rx), the main cytotoxic component in type II PDT. Experiments were performed in phantoms with the photosensitizer Photofrin and in solution using phosphorescence-based singlet oxygen luminescence dosimetry (SOLD) to validate the SOED model. Oxygen concentration and photosensitizer photobleaching versus time were measured during PDT, along with direct SOLD measurements of singlet oxygen and triplet state lifetime (τΔ and τt), for various photosensitizer concentrations to determine necessary photophysical parameters. SOLD-determined cumulative [¹O₂]rx was compared to SOED-calculated [¹O₂]rx for various photosensitizer concentrations to show a clear correlation between the two methods. This illustrates that explicit dosimetry can be used when phosphorescence-based dosimetry is not feasible. Using SOED modeling, we have also shown evidence that SOLD-measured [¹O₂]rx using a 523 nm pulsed laser can be used to correlate to singlet oxygen generated by a 630 nm laser during a clinical malignant pleural mesothelioma (MPM) PDT protocol by using a conversion formula.
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Affiliation(s)
- Michele M Kim
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104, USA.
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Rozhin Penjweini
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104, USA.
| | - Nathan R Gemmell
- Department of Electronic and Nanoscale Engineering, University of Glasgow, Glasgow G12 8LT, UK.
| | - Israel Veilleux
- Princess Margaret Cancer Centre, University of Toronto, ON M5G 1L7, Canada.
| | - Aongus McCarthy
- Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Gerald S Buller
- Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Robert H Hadfield
- Department of Electronic and Nanoscale Engineering, University of Glasgow, Glasgow G12 8LT, UK.
| | - Brian C Wilson
- Princess Margaret Cancer Centre, University of Toronto, ON M5G 1L7, Canada.
| | - Timothy C Zhu
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104, USA.
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27
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Li B, Lin L, Lin H, Wilson BC. Photosensitized singlet oxygen generation and detection: Recent advances and future perspectives in cancer photodynamic therapy. JOURNAL OF BIOPHOTONICS 2016; 9:1314-1325. [PMID: 27136270 DOI: 10.1002/jbio.201600055] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 04/11/2016] [Accepted: 04/12/2016] [Indexed: 05/03/2023]
Abstract
Photodynamic therapy (PDT) uses photosensitizers and visible light in combination with molecular oxygen to produce reactive oxygen species (ROS) that kill malignant cells by apoptosis and/or necrosis, shut down the tumor microvasculature and stimulate the host immune system. The excited singlet state of oxygen (1 O2 ) is recognized to be the main cytotoxic ROS generated during PDT for the majority of photosensitizers used clinically and for many investigational new agents, so that maximizing its production within tumor cells and tissues can improve the therapeutic response, and several emerging and novel approaches for this are summarized. Quantitative techniques for 1 O2 production measurement during photosensitization are also of immense importance of value for both preclinical research and future clinical practice. In this review, emerging strategies for enhanced photosensitized 1 O2 generation are introduced, while recent advances in direct detection and imaging of 1 O2 luminescence are summarized. In addition, the correlation between cumulative 1 O2 luminescence and PDT efficiency will be highlighted. Meanwhile, the validation of 1 O2 luminescence dosimetry for PDT application is also considered. This review concludes with a discussion on future demands of 1 O2 luminescence detection for PDT dosimetry, with particular emphasis on clinical translation. Eye-catching color image for graphical abstract.
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Affiliation(s)
- Buhong Li
- MOE Key Laboratory of OptoElectronic Science and Technology for Medicine, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Lisheng Lin
- MOE Key Laboratory of OptoElectronic Science and Technology for Medicine, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Huiyun Lin
- MOE Key Laboratory of OptoElectronic Science and Technology for Medicine, Fujian Provincial Key Laboratory for Photonics Technology, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Brian C Wilson
- Department of Medical Biophysics, University of Toronto/University Health Network, Toronto, Ontario M5G 1L7, Canada
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Penjweini R, Kim MM, Liu B, Zhu TC. Evaluation of the 2-(1-Hexyloxyethyl)-2-devinyl pyropheophorbide (HPPH) mediated photodynamic therapy by macroscopic singlet oxygen modeling. JOURNAL OF BIOPHOTONICS 2016; 9:1344-1354. [PMID: 27653233 PMCID: PMC5159301 DOI: 10.1002/jbio.201600121] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 07/12/2016] [Accepted: 08/21/2016] [Indexed: 05/02/2023]
Abstract
Photodynamic therapy (PDT) is known as a non-invasive treatment modality that is based on photochemical reactions between oxygen, photosensitizer, and a special wavelength of light. However, a dosimetric predictor for PDT outcome is still elusive because current dosimetric quantities do not account for the differences in the PDT oxygen consumption rate for different fluence rates. In this study, we evaluate several dose metrics, total fluence, photobleaching ratio, PDT dose, and mean reacted singlet oxygen (mean [1 O2 ]rx ) for predicting the PDT outcome and a clinically relevant tumor re-growth endpoint. For this reason, radiation-induced fibrosarcoma (RIF) mice tumors are treated with 2-(1-Hexyloxyethyl)-2-devinyl pyropheophorbide (HPPH) and different in-air fluences (30 J/cm2 , 50 J/cm2 , 135 J/cm2 , 250 J/cm2 , and 350 J/cm2 ) and in-air fluence rates (20, 50, 75, 150 mW/cm2 ). Explicit measurements of HPPH and oxygen concentration as well as tissue optical properties are performed pre- and post-treatment. Then, this information is incorporated into a macroscopic model to calculate the photobleaching, PDT dose, and mean [1 O2 ]rx . Changes in tumor volume are tracked following the treatment and compared with the dose metrics. The correlation demonstrates that mean [1 O2 ]rx serves as a better dosimetric quantity for predicting treatment outcome and a clinically relevant tumor re-growth endpoint.
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Affiliation(s)
| | | | - Baochang Liu
- University of Pennsylvania, School of Medicine, Department of Radiation Oncology, 3400 Civic Center Boulevard TRC 4W, hiladelphia, Pennsylvania 19104, USA
| | - Timothy C. Zhu
- University of Pennsylvania, School of Medicine, Department of Radiation Oncology, 3400 Civic Center Boulevard TRC 4W, hiladelphia, Pennsylvania 19104, USA
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Kim MM, Penjweini R, Liang X, Zhu TC. Explicit macroscopic singlet oxygen modeling for benzoporphyrin derivative monoacid ring A (BPD)-mediated photodynamic therapy. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 164:314-322. [PMID: 27721165 DOI: 10.1016/j.jphotobiol.2016.09.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 09/21/2016] [Indexed: 11/18/2022]
Abstract
Photodynamic therapy (PDT) is an effective non-ionizing treatment modality that is currently being used for various malignant and non-malignant diseases. In type II PDT with photosensitizers such as benzoporphyrin monoacid ring A (BPD), cell death is based on the creation of singlet oxygen (1O2). With a previously proposed empirical five-parameter macroscopic model, the threshold dose of singlet oxygen ([1O2]rx,sh]) to cause tissue necrosis in tumors treated with PDT was determined along with a range of the magnitude of the relevant photochemical parameters: the photochemical oxygen consumption rate per light fluence rate and photosensitizer concentration (ξ), the probability ratio of 1O2 to react with ground state photosensitizer compared to a cellular target (σ), the ratio of the monomolecular decay rate of the triplet state photosensitizer (β), the low photosensitizer concentration correction factor (δ), and the macroscopic maximum oxygen supply rate (g). Mice bearing radiation-induced fibrosarcoma (RIF) tumors were treated interstitially with a linear light source at 690nm with total energy released per unit length of 22.5-135J/cm and source power per unit length of 12-150mW/cm to induce different radii of necrosis. A fitting algorithm was developed to determine the photochemical parameters by minimizing the error function involving the range between the calculated reacted singlet oxygen ([1O2]rx) at necrosis radius and the [1O2]rx,sh. [1O2]rx was calculated based on explicit dosimetry of the light fluence distribution, the tissue optical properties, and the BPD concentration. The initial ground state oxygen concentration ([3O2]0) was set to be 40μM in this study. The photochemical parameters were found to be ξ=(55±40)×10-3cm2mW-1s-1, σ=(1.8±3)×10-5μM-1, and g=1.7±0.7μMs-1. We have taken the literature values for δ=33μM, and β=11.9μM. [1O2]rx has shown promise to be a more effective dosimetry quantity for predicting necrosis than either light dose or PDT dose, where the latter is simplistically a temporal integral of the products of the photosensitizer concentration and light fluence rate.
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Affiliation(s)
- Michele M Kim
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, United States; Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, United States
| | - Rozhin Penjweini
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, United States
| | - Xing Liang
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, United States
| | - Timothy C Zhu
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, United States.
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Qiu H, Kim MM, Penjweini R, Zhu TC. Macroscopic singlet oxygen modeling for dosimetry of Photofrin-mediated photodynamic therapy: an in-vivo study. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:88002. [PMID: 27552311 PMCID: PMC5331118 DOI: 10.1117/1.jbo.21.8.088002] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 08/01/2016] [Indexed: 05/19/2023]
Abstract
Although photodynamic therapy (PDT) is an established modality for cancer treatment, current dosimetric quantities, such as light fluence and PDT dose, do not account for the differences in PDT oxygen consumption for different fluence rates ( ? ). A macroscopic model was adopted to evaluate using calculated reacted singlet oxygen concentration ( [ O 2 1 ] rx ) to predict Photofrin-PDT outcome in mice bearing radiation-induced fibrosarcoma tumors, as singlet oxygen is the primary cytotoxic species responsible for cell death in type II PDT. Using a combination of fluences (50, 135, 200, and 250 ?? J / cm 2 ) and ? (50, 75, and 150 ?? mW / cm 2 ), tumor regrowth rate, k , was determined for each condition. A tumor cure index, CI = 1 ? k / k control , was calculated based on the k between PDT-treated groups and that of the control, Available on the SPIE Digital Library.
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Affiliation(s)
- Haixia Qiu
- Chinese PLA General Hospital, Department of Laser Medicine, No. 28 Fuxing Road, Haidian District, Beijing 100853, China
- University of Pennsylvania, School of Medicine, Department of Radiation Oncology, 3400 Civic Center Boulevard TRC 4W, Philadelphia, Pennsylvania 19104, United States
| | - Michele M. Kim
- University of Pennsylvania, School of Medicine, Department of Radiation Oncology, 3400 Civic Center Boulevard TRC 4W, Philadelphia, Pennsylvania 19104, United States
- University of Pennsylvania, Department of Physics and Astronomy, 209 South 33rd Street, Philadelphia, Pennsylvania 19104, United States
| | - Rozhin Penjweini
- University of Pennsylvania, School of Medicine, Department of Radiation Oncology, 3400 Civic Center Boulevard TRC 4W, Philadelphia, Pennsylvania 19104, United States
| | - Timothy C. Zhu
- University of Pennsylvania, School of Medicine, Department of Radiation Oncology, 3400 Civic Center Boulevard TRC 4W, Philadelphia, Pennsylvania 19104, United States
- Address all correspondence to: Timothy C. Zhu, E-mail:
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Penjweini R, Kim MM, Finlay JC, Zhu TC. Investigating the impact of oxygen concentration and blood flow variation on photodynamic therapy. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2016; 9694:96940L. [PMID: 27453622 PMCID: PMC4955668 DOI: 10.1117/12.2211120] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
Type II photodynamic therapy (PDT) is used for cancer treatment based on the combined action of a photosensitizer, a special wavelength of light, oxygen (3O2) and generation of singlet oxygen (1O2). Intra-patient and inter-patient variability of oxygen concentration ([3O2]) before and after the treatment as well as photosensitizer concentration and hemodynamic parameters such as blood flow during PDT has been reported. Simulation of these variations is valuable, as it would be a means for the rapid assessment of treatment effect. A mathematical model has been previously developed to incorporate the diffusion equation for light transport in tissue and the macroscopic kinetic equations for simulation of [3O2], photosensitizers in ground and triplet states and concentration of the reacted singlet oxygen ([1O2]rx) during PDT. In this study, the finite-element based calculation of the macroscopic kinetic equations is done for 2-(1-Hexyloxyethyl)-2-devinyl pyropheophorbide (HPPH)-mediated PDT by incorporating the information of the photosensitizer photochemical parameters as well as the tissue optical properties, photosensitizer concentration, initial oxygen concentration ([3O2]0), blood flow changes and ϕ that have been measured in mice bearing radiation-induced fibrosarcoma (RIF) tumors. Then, [1O2]rx calculated by using the measured [3O2] during the PDT is compared with [1O2]rx calculated based on the simulated [3O2]; both calculations showed a reasonably good agreement. Moreover, the impacts of the blood flow changes and [3O2]0 on [1O2]rx have been investigated, which showed no pronounced effect of the blood flow changes on the long-term 1O2 generation. When [3O2]0 becomes limiting, small changes in [3O2] have large effects on [1O2]rx.
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Affiliation(s)
- Rozhin Penjweini
- Department of Radiation Oncology, School of Medicine,
University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Michele M. Kim
- Department of Radiation Oncology, School of Medicine,
University of Pennsylvania, Philadelphia, PA 19104, USA
- Department of Physics and Astronomy, University of
Pennsylvania, Philadelphia, PA 19104, USA
| | - Jarod C. Finlay
- Department of Radiation Oncology, School of Medicine,
University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Timothy C. Zhu
- Department of Radiation Oncology, School of Medicine,
University of Pennsylvania, Philadelphia, PA 19104, USA
- ; phone 215-662-4043
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Kim MM, Penjweini R, Gemmell NR, Veilleux I, McCarthy A, Buller G, Hadfield RH, Wilson BC, Zhu TC. A feasibility study of singlet oxygen explicit dosmietry (SOED) of PDT by intercomparison with a singlet oxygen luminescence dosimetry (SOLD) system. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2016; 9694:969406. [PMID: 27064489 PMCID: PMC4823004 DOI: 10.1117/12.2213236] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
An explicit dosimetry model has been developed to calculate the apparent reacted 1O2 concentration ([1O2]rx) in an in-vivo model. In the model, a macroscopic quantity, g, is introduced to account for oxygen perfusion to the medium during PDT. In this study, the SOED model is extended for PDT treatment in phantom conditions where vasculature is not present; the oxygen perfusion is achieved through the air-phantom interface instead. The solution of the SOED model is obtained by solving the coupled photochemical rate equations incorporating oxygen perfusion through the air-liquid interface. Experiments were performed for two photosensitizers (PS), Rose Bengal (RB) and Photofrin (PH), in solution, using SOED and SOLD measurements to determine both the instantaneous [1O2] as well as cumulative [1O2]rx concentrations, where [1O2] rx = (1/τΔ) · ∫[1O2]dt. The PS concentrations varied between 10 and 100 mM for RB and ~200 mM for Photofrin. The resulting magnitudes of [1O2] were compared between SOED and SOLD.
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Affiliation(s)
- Michele M. Kim
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA, USA
| | - Rozhin Penjweini
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA
| | - Nathan R. Gemmell
- Department of Electronic and Nanoscale Engineering, University of Glasgow, UK
| | - Israel Veilleux
- Princess Margaret Cancer Centre, University of Toronto, Canada
| | - Aongus McCarthy
- Institute of Photonics and Quantum Sciences, Heriot-Watt University, UK
| | - Gerald Buller
- Institute of Photonics and Quantum Sciences, Heriot-Watt University, UK
| | - Robert H. Hadfield
- Department of Electronic and Nanoscale Engineering, University of Glasgow, UK
| | - Brian C. Wilson
- Princess Margaret Cancer Centre, University of Toronto, Canada
| | - Timothy C. Zhu
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA
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Penjweini R, Deville S, D'Olieslaeger L, Berden M, Ameloot M, Ethirajan A. Intracellular localization and dynamics of Hypericin loaded PLLA nanocarriers by image correlation spectroscopy. J Control Release 2015; 218:82-93. [DOI: 10.1016/j.jconrel.2015.09.064] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 09/27/2015] [Accepted: 09/28/2015] [Indexed: 01/17/2023]
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Wang P, Qin F, Zhang Z, Cao W. Quantitative monitoring of the level of singlet oxygen using luminescence spectra of phosphorescent photosensitizer. OPTICS EXPRESS 2015; 23:22991-3003. [PMID: 26368404 DOI: 10.1364/oe.23.022991] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The lack of accurate and robust photodynamic therapy dosimetry is one of the obstacles for the widespread clinical applications. In this study, we propose a methodology to monitor the production of reactive oxygen species in real-time using the phosphorescent spectra of metalloporphyrin based photosensitizer. The correlation among the phosphorescence intensity, the (1)O(2) quantum yield (Φ(Δ)) and the oxygen concentration [O(2)] was established. A method of determining Φ(Δ) with different [O(2)] was studied based on comparative spectrophotometry, and the quantum yield Φ(Δ) of gadolinium metalated hematoporphyrin mono ether (Gd-HMME) in methanol was determined for different [O(2)]. With our method, both [O(2)] and Φ(Δ) could be monitored simultaneously using the phosphorescence spectra. The photochemical reactions in a liquid phantom composed of Gd-HMME and (1)O(2) capture 1,3-diphenylisobenzofuran (DPBF) were correlated using the kinetics equations of singlet oxygen generation and reaction. Using our method, the (1)O(2) quantum yield becomes observable and the (1)O(2) dose rate could be calculated by the product of photosensitizer absorption and its (1)O(2) quantum yield. Moreover, this (1)O(2) dosimetry could be observed by spectral imaging intuitively without complex analysis, and is especially suitable for precise customized photodynamic treatment.
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Penjweini R, Liu B, Kim MM, Zhu TC. Explicit dosimetry for 2-(1-hexyloxyethyl)-2-devinyl pyropheophorbide-a-mediated photodynamic therapy: macroscopic singlet oxygen modeling. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:128003. [PMID: 26720883 PMCID: PMC4698734 DOI: 10.1117/1.jbo.20.12.128003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 11/18/2015] [Indexed: 05/07/2023]
Abstract
Type II photodynamic therapy (PDT) is based on the photochemical reactions mediated through an interaction between a photosensitizer, ground-state oxygen ([(3)O2]), and light excitation at an appropriate wavelength, which results in production of reactive singlet oxygen ([(1)O2]rx). We use an empirical macroscopic model based on four photochemical parameters for the calculation of [(1)O2]rx threshold concentration ([(1)O2]rx,sh) causing tissue necrosis in tumors after PDT. For this reason, 2-(1-hexyloxyethyl)-2-devinyl pyropheophorbide-a (HPPH)-mediated PDT was performed interstitially on mice with radiation-induced fibrosarcoma (RIF) tumors. A linear light source at 665 nm with total energy released per unit length of 12 to 100 J/cm and source power per unit length (LS) of 12 to 150 mW/cm was used to induce different radii of necrosis. Then the amount of [(1)O2]rx calculated by the macroscopic model incorporating explicit PDT dosimetry of light fluence distribution, tissue optical properties, and HPPH concentration was correlated to the necrotic radius to obtain the model parameters and [(1)O2]rx,sh. We provide evidence that [(1)O2]rx is a better dosimetric quantity for predicting the treatment outcome than PDT dose, which is proportional to the time integral of the products of the photosensitizer concentration and light fluence rate.
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Affiliation(s)
- Rozhin Penjweini
- University of Pennsylvania, School of Medicine, Department of Radiation Oncology, 3400 Civic Center Boulevard TRC 4W, Philadelphia, Pennsylvania 19104, United States
| | - Baochang Liu
- University of Pennsylvania, School of Medicine, Department of Radiation Oncology, 3400 Civic Center Boulevard TRC 4W, Philadelphia, Pennsylvania 19104, United States
| | - Michele M. Kim
- University of Pennsylvania, School of Medicine, Department of Radiation Oncology, 3400 Civic Center Boulevard TRC 4W, Philadelphia, Pennsylvania 19104, United States
| | - Timothy C. Zhu
- University of Pennsylvania, School of Medicine, Department of Radiation Oncology, 3400 Civic Center Boulevard TRC 4W, Philadelphia, Pennsylvania 19104, United States
- Address all correspondence to: Timothy C. Zhu, E-mail:
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