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Shakhova M, Elagin V, Plekhanov A, Khilov A, Kurakina D, Kamensky V, Kirillin M. Post-Operational Photodynamic Therapy of the Tumor Bed: Comparative Analysis for Cold Knife and Laser Scalpel Resection. Biomedicines 2024; 12:291. [PMID: 38397893 DOI: 10.3390/biomedicines12020291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/17/2024] [Accepted: 01/22/2024] [Indexed: 02/25/2024] Open
Abstract
In this paper, we report on a study regarding the efficiency of the post-operational phototherapy of the tumor bed after resection with both a cold knife and a laser scalpel in laboratory mice with CT-26 tumors. Post-operational processing included photodynamic therapy (PDT) with a topically applied chlorin-based photosensitizer (PS), performed at wavelengths of 405 or 660 nm, with a total dose of 150 J/cm2. The selected design of the tumor model yielded zero recurrence in the laser scalpel group and 92% recurrence in the cold knife group without post-processing, confirming the efficiency of the laser scalpel in oncology against the cold knife. The application of PDT after the cold knife resection decreased the recurrence rate to 70% and 42% for the 405 nm and 660 nm procedures, respectively. On the other hand, the application of PDT after the laser scalpel resection induced recurrence rates of 18% and 30%, respectively, for the considered PDT performance wavelengths. The control of the penetration of PS into the tumor bed by fluorescence confocal microscopy indicated the deeper penetration of PS in the case of the cold knife, which presumably provided deeper PDT action, while the low-dose light exposure of deeper tissues without PS, presumably, stimulated tumor recurrence, which was also confirmed by the differences in the recurrence rate in the 405 and 660 nm groups. Irradiation-only light exposures, in all cases, demonstrated higher recurrence rates compared to the corresponding PDT cases. Thus, the PDT processing of the tumor bed after resection could only be recommended for the cold knife treatment and not for the laser scalpel resection, where it could induce tumor recurrence.
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Affiliation(s)
- Maria Shakhova
- Department of Ear, Nose and Throat Diseases, FSBEI HE «Privolzhsky Research Medical University» MOH Russia, 10/1 Minin and Pozharsky Square, Nizhny Novgorod 603005, Russia
| | - Vadim Elagin
- Institute of Experimental Oncology and Biomedical Technologies, FSBEI HE «Privolzhsky Research Medical University» MOH Russia, 10/1 Minin and Pozharsky Square, Nizhny Novgorod 603005, Russia
| | - Anton Plekhanov
- Institute of Experimental Oncology and Biomedical Technologies, FSBEI HE «Privolzhsky Research Medical University» MOH Russia, 10/1 Minin and Pozharsky Square, Nizhny Novgorod 603005, Russia
| | - Aleksandr Khilov
- A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov St., Nizhny Novgorod 603155, Russia
| | - Daria Kurakina
- A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov St., Nizhny Novgorod 603155, Russia
| | - Vladislav Kamensky
- Institute of Experimental Oncology and Biomedical Technologies, FSBEI HE «Privolzhsky Research Medical University» MOH Russia, 10/1 Minin and Pozharsky Square, Nizhny Novgorod 603005, Russia
- A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov St., Nizhny Novgorod 603155, Russia
| | - Mikhail Kirillin
- A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov St., Nizhny Novgorod 603155, Russia
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Imanishi H, Nishimura T, Shimojo Y, Awazu K. Deep learning based depth map estimation of protoporphyrin IX in turbid media using dual wavelength excitation fluorescence. BIOMEDICAL OPTICS EXPRESS 2023; 14:5254-5266. [PMID: 37854564 PMCID: PMC10581804 DOI: 10.1364/boe.500022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/09/2023] [Accepted: 09/11/2023] [Indexed: 10/20/2023]
Abstract
This study presents a depth map estimation of fluorescent objects in turbid media, such as biological tissue based on fluorescence observation by two-wavelength excitation and deep learning-based processing. A U-Net-based convolutional neural network is adapted for fluorophore depth maps from the ratiometric information of the two-wavelength excitation fluorescence. The proposed method offers depth map estimation from wide-field fluorescence images with rapid processing. The feasibility of the proposed method was demonstrated experimentally by estimating the depth map of protoporphyrin IX, a recognized cancer biomarker, at different depths within an optical phantom.
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Affiliation(s)
- Hinano Imanishi
- Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Takahiro Nishimura
- Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Yu Shimojo
- Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
- Graduate School of Medicine, Osaka Metropolitan University, Asahimachi 1-4-3, Abeno-ku, Osaka 545-8585, Japan
- Research Fellow of Japan Society for the Promotion of Science, Kojimachi 5-3-1, Chiyoda-ku, Tokyo 102-0083, Japan
| | - Kunio Awazu
- Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
- Global Center for Medical Engineering and Informatics, Osaka University, Yamadaoka 2-2, Suita, Osaka 565-0871, Japan
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Udeneev A, Kulichenko A, Kalyagina N, Shiryaev A, Pisareva T, Plotnikova A, Linkov K, Zavodnov S, Loshchenov M. Comparison of chlorin-e6 detection efficiency by video systems with excitation wavelengths of 405nm and 635nm. Photodiagnosis Photodyn Ther 2023; 43:103729. [PMID: 37517428 DOI: 10.1016/j.pdpdt.2023.103729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/10/2023] [Accepted: 07/25/2023] [Indexed: 08/01/2023]
Abstract
BACKGROUND Fluorescence diagnostics with two different wide field-of-view imaging systems with fluorescence excitation at 405 nm and 635 nm, respectively, were compared. Both systems include fluorescence quantification and experimental geometry normalization algorithms. METHODS A newly developed system with an excitation wavelength of 405 nm was tested on intralipid fluorescent tumor phantoms with chlorin-e6. Both, this new system and a second existing system with an excitation wavelength of 635 nm, were used for fluorescent diagnosis in six patients with basal cell carcinoma and cancer of the oral mucosa. For PDT, a red diode laser with a wavelength of 660 nm was used for all 6 patients. One patient received an additional irradiation using the red LED source of the new system RESULTS: The boundaries of the lesions and the fluorescence intensity were successfully determined by both video systems. CONCLUSIONS Both fluorescence imaging approaches showed comparable contrast between diseased and healthy tissues. For oral mucosal cancer, a system with violet fluorescence excitation, bispectral frame analysis, and time-resolved background suppression showed better contrast between the tumor and normal tissue and effective elimination of autofluorescence. Moreover, both systems provided efficient quantification of fluorescence and gave fluorescence indices that were weakly dependent on the distance between the device and the tissue.
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Affiliation(s)
- Andrei Udeneev
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute MEPhI), Kashirskoye shosse 31, Moscow, 115409 Russia.
| | - Anastasia Kulichenko
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute MEPhI), Kashirskoye shosse 31, Moscow, 115409 Russia; Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilova Str., 38, Moscow, 119991 Russia
| | - Nina Kalyagina
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute MEPhI), Kashirskoye shosse 31, Moscow, 115409 Russia; Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilova Str., 38, Moscow, 119991 Russia
| | - Artem Shiryaev
- Sechenov First Moscow State Medical University (Sechenov University), Ministry of Health of the Russian Federation, Department of Oncology, Radiotherapy and Reconstructive Surgery, University Clinical Hospital No.1, Bolshaya Pirogovskaya Str., 6, Moscow, 119435, Russia
| | - Tatiana Pisareva
- Sechenov First Moscow State Medical University (Sechenov University), Ministry of Health of the Russian Federation, Department of Oncology, Radiotherapy and Reconstructive Surgery, University Clinical Hospital No.1, Bolshaya Pirogovskaya Str., 6, Moscow, 119435, Russia
| | - Arina Plotnikova
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute MEPhI), Kashirskoye shosse 31, Moscow, 115409 Russia
| | - Kirill Linkov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilova Str., 38, Moscow, 119991 Russia
| | - Sergei Zavodnov
- Sechenov First Moscow State Medical University (Sechenov University), Ministry of Health of the Russian Federation, Department of Oncology, Radiotherapy and Reconstructive Surgery, University Clinical Hospital No.1, Bolshaya Pirogovskaya Str., 6, Moscow, 119435, Russia
| | - Maxim Loshchenov
- National Research Nuclear University MEPhI (Moscow Engineering Physics Institute MEPhI), Kashirskoye shosse 31, Moscow, 115409 Russia
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Diffuse Optical Spectroscopy Monitoring of Experimental Tumor Oxygenation after Red and Blue Light Photodynamic Therapy. PHOTONICS 2021. [DOI: 10.3390/photonics9010019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Photodynamic therapy (PDT) is an effective technique for cancer treatment based on photoactivation of photosensitizer accumulated in pathological tissues resulting in singlet oxygen production. Employment of red (660 nm) or blue (405 nm) light differing in typical penetration depth within the tissue for PDT performance provides wide opportunities for improving PDT protocols. Oxygenation dynamics in the treated area can be monitored using diffuse optical spectroscopy (DOS) which allows evaluating tumor response to treatment. In this study, we report on monitoring oxygenation dynamics in experimental tumors after PDT treatment with chlorin-based photosensitizers using red or blue light. The untreated and red light PDT groups demonstrate a gradual decrease in tumor oxygen saturation during the 7-day observation period, however, the reason is different: in the untreated group, the effect is explained by the excessive tumor growth, while in the PDT group, the effect is caused by the blood flow arrest preventing delivery of oxygenated blood to the tumor. The blue light PDT procedure, on the contrary, demonstrates the preservation of the blood oxygen saturation in the tumor during the entire observation period due to superficial action of the blue-light PDT and weaker tumor growth inhibition. Irradiation-only regimes show a primarily insignificant decrease in tumor oxygen saturation owing to partial inhibition of tumor growth. The DOS observations are interpreted based on histology analysis.
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