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https://www.readbyqxmd.com/read/29749554/enhanced-production-of-reactive-oxygen-species-in-hela-cells-under-concurrent-low%C3%A2-dose-carboplatin-and-photofrin%C3%A2-photodynamic-therapy
#1
Younshick Choi, Ji-Eun Chang, Sanghoon Jheon, Sei-Jun Han, Jong-Ki Kim
Concurrent low‑dose carboplatin/Photofrin® photodynamic therapy (ccPDT) has been shown to promote relapse‑free complete tumor regression in cervical or endometrial cancer patients as a fertility‑preservation therapy. This study aimed to investigate the molecular mechanism of the enhanced therapeutic efficacy of ccPDT by determining intracellular reactive oxygen species (ROS) and necrotic or apoptotic cell damage in HeLa cells loaded with fluorescent oxidant agents and Photofrin or/and carboplatin under light irradiation...
May 3, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29719775/an-updated-overview-on-the-development-of-new-photosensitizers-for-anticancer-photodynamic-therapy
#2
REVIEW
Juan Zhang, Chengshi Jiang, João Paulo Figueiró Longo, Ricardo Bentes Azevedo, Hua Zhang, Luis Alexandre Muehlmann
Photodynamic therapy (PDT), based on the photoactivation of photosensitizers (PSs), has become a well-studied therapy for cancer. Photofrin® , belonging to the first generation of PS, is still widely used for the treatment of different kinds of cancers; however, it has several drawbacks that significantly limit its general clinical use. Consequently, there has been extensive research on the design of PS molecules with optimized pharmaceutical properties, with aiming of overcoming the disadvantages of traditional PS, such as poor chemical purity, long half-life, excessive accumulation into the skin, and low attenuation coefficients...
March 2018: Acta Pharmaceutica Sinica. B
https://www.readbyqxmd.com/read/29715586/biological-effects-in-photodynamic-treatment-combined-with-electropermeabilization-in-wild-and-drug-resistant-breast-cancer-cells
#3
Joanna Weżgowiec, Julita Kulbacka, Jolanta Saczko, Joanna Rossowska, Grzegorz Chodaczek, Małgorzata Kotulska
Electrochemotherapy became one of the therapeutic protocols successfully used in oncology. However, biological effects occurring in cells, especially those which are drug resistant, have not been studied thoroughly. This study presents response of wild and drug resistant breast cancer cells to classical photodynamic therapy with Photofrin or experimental photodynamic therapy with cyanine IR-775, combined with electroporation. Photodynamic reaction or electroporation alone had no cytotoxic effect, but their combination significantly disturbed cellular functions...
April 19, 2018: Bioelectrochemistry
https://www.readbyqxmd.com/read/29463237/inhibition-of-autophagy-sensitizes-cancer-cells-to-photofrin-based-photodynamic-therapy
#4
Antoni Domagala, Joanna Stachura, Magdalena Gabrysiak, Angelika Muchowicz, Radoslaw Zagozdzon, Jakub Golab, Malgorzata Firczuk
BACKGROUND: Accumulating evidence suggest that autophagy plays a pivotal role in various anticancer therapies, including photodynamic therapy (PDT), acting as a pro-death or pro-survival mechanism in a context-dependent manner. Therefore, we aimed to determine the role of autophagy in Photofrin-based PDT. METHODS: In vitro cytotoxic/cytostatic effects of PDT were evaluated with crystal violet cell viability assay. Autophagy induction was analyzed by immunoblotting and immunofluorescence using anti-LC3 antibody...
February 20, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29399826/photodynamic-therapy-via-navigational-bronchoscopy-for-peripheral-lung-cancer-in-dogs
#5
Ali I Musani, Julia K Veir, Zheng Huang, Tim Lei, Steve Groshong, Deanna Worley
OBJECTIVE: In the setting of lung cancer, photodynamic therapy (PDT) is typically used to treat centrally located endobronchial tumors. The development of navigational bronchoscopy has opened the potential for using PDT to treat peripheral lung tumors. However, there is limited information about the feasibility of this approach for treating peripheral lung cancers, and about its effects on surrounding healthy lung tissue. We studied the use of PDT delivered by electromagnetic navigational bronchoscopy to treat peripheral lung cancer in dogs...
February 5, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29331658/sulforaphene-enhances-the-efficacy-of-photodynamic-therapy-in-anaplastic-thyroid-cancer-through-ras-raf-mek-erk-pathway-suppression
#6
Saswata Chatterjee, Yunhee Rhee, Phil-Sang Chung, Rui-Feng Ge, Jin-Chul Ahn
Sulforaphene (SFE), a natural isothiocyanate from cruciferous vegetables has shown a potential anticancer effect against cervical and lung cancer. Palliative treatments like photodynamic therapy (PDT) are being implemented for a long time however, the results are still not promising in case of aggressive cancers like anaplastic thyroid cancer. The objective of this work is to establish an alternative method with the combination of photofrin-PDT and sulforaphene, a natural isothiocyanate from cruciferous vegetables, against human anaplastic thyroid cancer to enhance the efficacy of PDT...
February 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29214668/photofrin-%C3%A2-photodynamic-therapy-with-intratumor-photosensitizer-injection-provides-similar-tumor-response-while-reducing-systemic-skin-photosensitivity-pilot-murine-study
#7
Timothy M Baran
OBJECTIVES: The goal of this study was to compare tumor response to Photofrin® photodynamic therapy using intravenous and intratumoral injection of photosensitizer. Systemic skin photosensitivity and photosensitizer distribution were also compared between the two delivery methods. METHODS: SCCVII tumors were initiated in the hind legs of female C3H mice and grown to a volume of ∼1,000 mm3 . Photofrin® was delivered intravenously via the tail vein at a concentration of 2 mg/kg or intratumorally at concentrations ranging from 0...
December 7, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29164403/a-novel-photodynamic-therapy-based-drug-delivery-system-layered-on-a-stent-for-treating-cholangiocarcinoma
#8
Po-Chin Liang, Kai-Wen Huang, Chien-Chih Tung, Ming-Chu Chang, Fuh-Yu Chang, Jau-Min Wong, Yu-Ting Chang
This study aimed to investigate the drug delivery efficacy and bio-effectiveness of a novel photodynamic therapy (PDT)-matrix drug delivery system for cholangiocarcinoma (CCA). Metallic stents were coated with polyurethane (PU) as the first layer. A 2-hydroxyethyl methacrylate (2-HEMA)/ethylene glycol dimethacrylate (EGDMA)/benzoyl peroxide (BPO) layer and a poly(ethylene-co-vinyl acetate) (PEVA)/poly(n-butyl methacrylate) (PBMA)/polyvinylpyrrolidone K30 (K30) layer containing various concentrations of Photofrin were then incorporated onto the stent as the second and third layers...
November 22, 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/29161901/long-term-outcomes-of-the-randomized-controlled-trial-comparing-5-aminolaevulinic-acid-and-photofrin-photodynamic-therapy-for-barrett-s-oesophagus-related-neoplasia
#9
Darina Kohoutova, Rehan Haidry, Matthew Banks, Mohammed Adil Butt, Jason Dunn, Sally Thorpe, Laurence Lovat
OBJECTIVE: Photodynamic therapy (PDT) was used as therapy for early neoplasia associated with Barrett's oesophagus (BE). This is 5-year follow-up of patients enrolled into randomised controlled trial of 5-aminolaevulinic acid (ALA) vs. Photofrin PDT. METHODS: Biopsies were taken from original Barrett's segment during endoscopic follow up using Seattle protocol. Endoscopic mucosal resection (EMR) ± radiofrequency ablation (RFA) was preferred therapy in patients who failed PDT and/or had recurrent neoplasia...
November 21, 2017: Scandinavian Journal of Gastroenterology
https://www.readbyqxmd.com/read/29106380/pdt-dose-dosimetry-for-photofrin-mediated-pleural-photodynamic-therapy-ppdt
#10
Yi Hong Ong, Michele M Kim, Jarod C Finlay, Andreea Dimofte, Sunil Singhal, Eli Glatstein, Keith A Cengel, Timothy C Zhu
Photosensitizer fluorescence excited by photodynamic therapy (PDT) treatment light can be used to monitor the in vivo concentration of the photosensitizer and its photobleaching. The temporal integral of the product of in vivo photosensitizer concentration and light fluence is called PDT dose, which is an important dosimetry quantity for PDT. However, the detected photosensitizer fluorescence may be distorted by variations in the absorption and scattering of both excitation and fluorescence light in tissue...
December 29, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29022915/wild-type-and-mutant-p53-differentially-modulate-mir-124-iaspp-feedback-following-pohotodynamic-therapy-in-human-colon-cancer-cell-line
#11
Kuijie Liu, Weidong Chen, Sanlin Lei, Li Xiong, Hua Zhao, Dong Liang, Zhendong Lei, Nanjiang Zhou, Hongliang Yao, Ying Liang
Colorectal cancer (CRC) is a most common digestive system malignant tumor. p53 mutation has essential role in cancers and is frequently observed in CRC and presents a huge challenge. p53 mutation has been reported to attenuate the inhibitory effect of photofrin-based photodynamic therapy (PDT). p53 mutation-induced gain of function brings up the dysfunction of carcinogenic factors, including miRNAs. Our research found that PDT suppressed CRC cell viability, reduced the tumor size and prolonged the survival time, all of which could be attenuated by p53 mutation or deletion...
October 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28988135/skin-fluorescence-following-photodynamic-therapy-with-npe6-photosensitizer
#12
Keishi Ohtani, Jitsuo Usuda, Emiyu Ogawa, Sachio Maehara, Kentaro Imai, Yujin Kudo, Shotaro Ono, Shunsuke Shigefuku, Daisuke Eriguchi, Tatsuya Inoue, Junichi Maeda, Koichi Yoshida, Masaru Hagiwara, Masatoshi Kakihana, Naohiro Kajiwara, Tatsuo Ohira, Tsunenori Arai, Norihiko Ikeda
BACKGROUND: The second-generation photosensitizer NPe6 has strong anti-tumor effects with a much shorter photosensitive period than the first-generation photosensitizer Photofrin. Although photosensitive period has been reduced, skin photosensitivity is still a major side effect of photodynamic therapy (PDT). Therefore, we conducted a prospective study to investigate whether the NPe6 fluorescence intensity in skin after PDT could be measured effectively in human patients to improve the management of a patient's photosensitive period...
December 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28690354/a-summary-of-light-dose-distribution-using-an-ir-navigation-system-for-photofrin-mediated-pleural-pdt
#13
Timothy C Zhu, Michele M Kim, Yi-Hong Ong, Rozhin Penjweini, Andreea Dimofte, Jarod C Finlay, Carmen Rodriguez, Keith A Cengel
Uniform delivery of light fluence is an important goal for photodynamic therapy. We present summary results for an infrared (IR) navigation system to deliver light dose uniformly during intracavitory PDT by tracking the movement of the light source and providing real-time feedback on the light fluence rate on the entire cavity surface area. In the current intrapleural PDT protocol, 8 detectors placed in selected locations in the pleural cavity monitor the light doses. To improve the delivery of light dose uniformity, an IR camera system is used to track the motion of the light source as well as the surface contour of the pleural cavity...
January 28, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28523110/photodynamic-activities-of-porphyrin-derivative-cyclodextrin-complexes-by-photoirradiation
#14
Atsushi Ikeda, Shuhei Satake, Tomoya Mae, Masafumi Ueda, Kouta Sugikawa, Hajime Shigeto, Hisakage Funabashi, Akio Kuroda
Water-soluble cyclodextrin (CyD) complexed with porphyrin derivatives with different substituents in the meso-positions showed different photodynamic activities toward cancer cells under illumination at wavelengths over 600 nm, the most suitable wavelengths for photodynamic therapy (PDT). In particular, aniline- and phenol-substituted derivatives had high photodynamic activity because of the efficient intracellular uptake of the complexes by tumor cells. These complexes showed greater photodynamic activity than photofrin, currently the main drug in clinical use as a photosensitizer...
May 11, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28480637/photodynamic-treatment-outcomes-of-potentially-malignant-lesions-and-malignancies-of-the-head-and-neck-region-a-systematic-review
#15
Shailesh M Gondivkar, Amol Ramchandra Gadbail, Manjari G Choudhary, Priyanka R Vedpathak, Manoj S Likhitkar
AIM: The aim of the present study was to systematically review the efficacy of photodynamic therapy (PDT) in the management of oral potentially-malignant disorders (PMDS) and head and neck squamous cell carcinoma (HNSCC). METHODS: From 1985 to 2015, PubMed/Medline, Google Scholar, EMBASE, and ISI Web of Knowledge were searched using different combinations of the following key words: PDT, oral precancer, leukoplakia, erythroplakia, erythroleukoplakia, verrucous hyperplasia, oral submucous fibrosis, and HNSCC...
February 2018: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/28465586/oxidation-of-protein-bound-methionine-in-photofrin-photodynamic-therapy-treated-human-tumor-cells-explored-by-methionine-containing-peptide-enrichment-and-quantitative-proteomics-approach
#16
Ya-Ju Hsieh, Kun-Yi Chien, I-Fang Yang, I-Neng Lee, Chia-Chun Wu, Tung-Yung Huang, Jau-Song Yu
In Photofrin-mediated photodynamic therapy (PDT), cell fate can be modulated by the subcellular location of Photofrin. PDT triggers oxidative damage to target cells, including the methionine (Met) oxidation of proteins. Here, we developed a new Met-containing peptide enrichment protocol combined with SILAC-based quantitative proteomics, and used this approach to explore the global Met oxidation changes of proteins in PDT-treated epidermoid carcinoma A431 cells preloaded with Photofrin at the plasma membrane, ER/Golgi, or ubiquitously...
May 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28441937/observation-of-zn-photoprotoporphyrin-red-autofluorescence-in-human-bronchial-cancer-using-color-fluorescence-endoscopy
#17
Yoshinobu Ohsaki, Takaaki Sasaki, Satoshi Endo, Masahiro Kitada, Shunsuke Okumura, Noriko Hirai, Yoshihiro Kazebayashi, Eri Toyoshima, Yasushi Yamamoto, Kaneyoshi Takeyama, Susumu Nakajima, Isao Sakata
BACKGROUND: We observed red autofluorescence emanating from bronchial cancer lesions using a sensitive color-fluorescence endoscopy system. We investigated to clarify the origin of the red autofluorescence. METHODS: The wavelengths of the red autofluorescence emanating from lesions were measured in eight patients using a spectrum analyzer and compared based on pathologic findings. Red autofluorescence at 617.3, 617.4, 619.0, and 617.1 nm was emitted by normal bronchus, inflamed tissue, tissue exhibiting mild dysplasia, and malignant lesions, respectively...
April 26, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28417552/enhanced-phototoxicity-of-photodynamic-treatment-by-cx26-composed-gjic-via-ros-calcium-and-lipid-peroxide-mediated-pathways
#18
Deng-Pan Wu, Tian-Yu Lin, Li-Ru Bai, Jin-Lan Huang, Yan Zhou, Nan Zhou, Sheng-Lei Zhong, Shan Gao, Xiao-Xing Yin
In spite of the promising initial treatment responses presented by photodynamic therapy (PDT), 5-year recurrence rates remain high level. Therefore, improvement in the efficacy of PDT is needed. There are reports showing that connexin(Cx) 26-composed gap junctional intercellular communication (GJIC) enhances the intercellular propagation of "death signal", thereby increasing chemotherapeutic cytotoxicity. However, it is unclear whether Cx26-formed GJIC has an effect on PDT phototoxicity. The results in the present study showed that Cx26-composed GJ formation at high density enhances the phototoxicity of Photofrin-PDT...
December 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28362026/erratum-macroscopic-singlet-oxygen-modeling-for-dosimetry-of-photofrin-mediated-photodynamic-therapy-an-in-vivo-study
#19
Haixia Qiu, Michele M Kim, Rozhin Penjweini, Timothy C Zhu
No abstract text is available yet for this article.
April 1, 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28252029/interaction-and-oxidative-damage-of-dvdms-to-bsa-a-study-on-the-mechanism-of-photodynamic-therapy-induced-cell-death
#20
Li Li, Huiyu Wang, Haiping Wang, Lijun Li, Pan Wang, Xiaobing Wang, Quanhong Liu
Photodynamic therapy (PDT) is a promising method for neoplastic and nonneoplastic diseases. In this study, we utilized sinoporphyrin sodium (DVDMS) as a sensitizer combined with light to investigate its cytotoxic effect on different cell lines. For this purpose, we chose bovine serum albumin (BSA) as a model to explore the mechanism of PDT-induced cell death at a molecular level. Our findings indicated that the combined treatment significantly suppressed cell survival. Fluorescence spectroscopy revealed a strong interaction between DVDMS and BSA molecules in aqueous solution, affecting DVDMS' targeting distribution and metabolism...
March 2, 2017: Scientific Reports
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