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Photodynamic therapy cancer

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https://www.readbyqxmd.com/read/28432944/phototoxic-action-of-a-zinc-ii-phthalocyanine-encapsulated-into-poloxamine-polymeric-micelles-in-2d-and-3d-colon-carcinoma-cell-cultures
#1
Nicolás Chiarante, María C García Vior, Josefina Awruch, Julieta Marino, Leonor P Roguin
Photodynamic therapy is emerging as a hopeful method for the treatment of oncological diseases. In the search of novel therapeutic strategies for colorectal cancer, in this work we reported the photocytotoxic activity of a lipophilic zinc(II) phthalocyanine on a murine colon adenocarcinoma cell line (CT26 cells). The 2,9(10),16(17),23(24) tetrakis[(2-dimethylamino)ethylsulfanyl]phthalocyaninatozinc(II), named Pc9, was encapsulated into Tetronic® 1107 polymeric poloxamine micelles (T1107) and assayed in 2D and 3D cell cultures...
April 11, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28431928/cisplatin-and-photodynamic-therapy-exert-synergistic-inhibitory-effects-on-small-cell-lung-cancer-cell-viability-and-xenograft-tumor-growth
#2
You-Shuang Chen, Yin-Bo Peng, Min Yao, Ji-Ping Teng, Da Ni, Zhi-Jun Zhu, Bu-Feng Zhuang, Zhi-Yin Yang
Lung cancer is the leading cause of cancer death worldwide. Small-cell lung cancer (SCLC) is an aggressive type of lung cancer that shows an overall 5-year survival rate below 10%. Although chemotherapy using cisplatin has been proven effective in SCLC treatment, conventional dose of cisplatin causes adverse side effects. Photodynamic therapy, a form of non-ionizing radiation therapy, is increasingly used alone or in combination with other therapeutics in cancer treatment. Herein, we aimed to address whether low dose cisplatin combination with PDT can effectively induce SCLC cell death by using in vitro cultured human SCLC NCI-H446 cells and in vivo tumor xenograft model...
April 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28430624/photosensitizers-in-prostate-cancer-therapy
#3
REVIEW
Taher Gheewala, Troy Skwor, Gnanasekar Munirathinam
The search for new therapeutics for the treatment of prostate cancer is ongoing with a focus on the balance between the harms and benefits of treatment. New therapies are being constantly developed to offer treatments similar to radical therapies, with limited side effects. Photodynamic therapy (PDT) is a promising strategy in delivering focal treatment in primary as well as post radiotherapy prostate cancer. PDT involves activation of a photosensitizer (PS) by appropriate wavelength of light, generating transient levels of reactive oxygen species (ROS)...
February 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28429726/verteporfin-induced-formation-of-protein-cross-linked-oligomers-and-high-molecular-weight-complexes-is-mediated-by-light-and-leads-to-cell-toxicity
#4
Eleni K Konstantinou, Shoji Notomi, Cassandra Kosmidou, Katarzyna Brodowska, Ahmad Al-Moujahed, Fotini Nicolaou, Pavlina Tsoka, Evangelos Gragoudas, Joan W Miller, Lucy H Young, Demetrios G Vavvas
Verteporfin (VP) was first used in Photodynamic therapy, where a non-thermal laser light (689 nm) in the presence of oxygen activates the drug to produce highly reactive oxygen radicals, resulting in local cell and tissue damage. However, it has also been shown that Verteporfin can have non-photoactivated effects such as interference with the YAP-TEAD complex of the HIPPO pathway, resulting in growth inhibition of several neoplasias. More recently, it was proposed that, another non-light mediated effect of VP is the formation of cross-linked oligomers and high molecular weight protein complexes (HMWC) that are hypothesized to interfere with autophagy and cell growth...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28423634/early-assessment-of-tumor-response-to-photodynamic-therapy-using-combined-diffuse-optical-and-diffuse-correlation-spectroscopy-to-predict-treatment-outcome
#5
Patricia Thong, Kijoon Lee, Hui-Jin Toh, Jing Dong, Chuan-Sia Tee, Kar-Perng Low, Pui-Haan Chang, Ramaswamy Bhuvaneswari, Ngian-Chye Tan, Khee-Chee Soo
Photodynamic therapy (PDT) of cancer involves the use of a photosensitizer that can be light-activated to eradicate tumors via direct cytotoxicity, damage to tumor vasculature and stimulating the body's immune system. Treatment outcome may vary between individuals even under the same regime; therefore a non-invasive tumor response monitoring system will be useful for personalization of the treatment protocol. We present the combined use of diffuse optical spectroscopy (DOS) and diffuse correlation spectroscopy (DCS) to provide early assessment of tumor response...
March 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28420143/biotinylated-chlorin-and-its-zinc-and-indium-complexes-synthesis-and-in-vitro-biological-evaluation-for-photodynamic-therapy
#6
Meden F Isaac-Lam, Dewana M Hammonds
The synthesis and characterization of biotinylated chlorin photosensitizer and the corresponding zinc and indium complexes are described for potential applications in photodynamic therapy (PDT) for cancer. Phototoxicity of the biotin-chlorin conjugate and the metallated complexes was determined in colon carcinoma CT26 cell lines known to overexpress biotin (Vit B₇) receptors. Cell survival assay indicated that the biotinylated chlorin and indium complex showed increased cell growth inhibition than the zinc complex and the starting chlorin (methyl pheophorbide)...
April 15, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28417485/tumor-microenvironment-triggered-supramolecular-system-as-an-in-situ-nanotheranostic-generator-for-cancer-phototherapy
#7
Chengchao Chu, Huirong Lin, Heng Liu, Xiaoyong Wang, Junqing Wang, Pengfei Zhang, Haiyan Gao, Chao Huang, Yun Zeng, Yuanzhi Tan, Gang Liu, Xiaoyuan Chen
The efficacy of photosensitizers in cancer phototherapy is often limited by photobleaching, low tumor selectivity, and tumor hypoxia. Assembling photosensitizers into nanostructures can improve photodynamic therapy efficacy and the safety profile of photosensitizers. Herein by employing supramolecular assembly, enhanced theranostic capability of Mn(2+) -assisted assembly of a photosensitizer (sinoporphyrin sodium, DVDMS) is demonstrated. A tumor environment-triggered coassembly strategy is further developed to form Mn/DVDMS nanotheranostics (nanoDVD) for cancer phototherapy...
April 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28416605/photodynamic-therapy-using-photosensitizer-encapsulated-polymeric-nanoparticle-to-overcome-atp-binding-cassette-transporter-subfamily-g2-function-in-pancreatic-cancer
#8
Yoon Jin Roh, Ju Hee Kim, In-Wook Kim, Kun Na, Jae Myung Park, Myung-Gyu Choi
Chlorin-based photosensitizers are commonly used in photodynamic therapy (PDT).  These drugs are effluxed by cell-membrane transporters, such as the ATP-binding cassette subfamily G member 2 (ABCG2). PDT efficacy is limited in tumor cells expressing high levels of these proteins. Pancreatic cancer cell lines AsPC-1 and MIA PaCa-2, which have high and low ABCG2 expression, respectively, were used and ABCG2-overexpressing MIA PaCa-2 cells were generated. We compared PDT efficacy between Chlorin e6 (Ce6) and cationic photosensitizer-encapsulated polymeric nanoparticle (PS-pNP) which is comprised with Ce6, polyethylene glycol and polyethylenimine...
April 17, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28415738/tyrosine-kinase-inhibitor-induced-growth-factor-receptor-upregulation-enhances-the-efficacy-of-near-infrared-targeted-photodynamic-therapy-in-esophageal-adenocarcinoma-cell-lines
#9
Elmire Hartmans, Matthijs D Linssen, Claire Sikkens, Afra Levens, Max J H Witjes, Gooitzen M van Dam, Wouter B Nagengast
Esophageal carcinoma (EC) is a global health problem, with disappointing 5-year survival rates of only 15-25%. Near-infrared targeted photodynamic therapy (NIR-tPDT) is a novel strategy in which cancer-targeted phototoxicity is able to selectively treat malignant cells. In this in vitro report we demonstrate the applicability of antibody-based NIR-tPDT in esophageal adenocarcinoma (EAC), using the phototoxic compounds cetuximab-IRDye700DX and trastuzumab-IRDye700DX, targeting respectively epidermal growth factor receptor 1 (EGFR) and 2 (HER2)...
March 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28405328/photodynamic-therapy-with-polyhematoporphyrin-for-malignant-biliary-obstruction-a-nationwide-retrospective-study-of-150-consecutive-applications
#10
Werner Dolak, Hubert Schwaighofer, Brigitte Hellmich, Bernhard Stadler, Georg Spaun, Wolfgang Plieschnegger, Arnold Hebenstreit, Jutta Weber-Eibel, Franz Siebert, Klaus Emmanuel, Peter Knoflach, Michael Gschwantler, Wolfgang Vogel, Michael Trauner, Andreas Püspök
BACKGROUND: Photodynamic therapy (PDT) is a palliative treatment for malignant biliary obstruction. OBJECTIVE: The objective of this article is to assess the feasibility and safety of this technique. METHODS: In this nationwide, retrospective study of prospectively collected clinical data, all patients treated with PDT using polyhematoporphyrin in Austria from March 2004 to May 2013 were included. Feasibility, adverse events, stent patency and mortality rates were investigated...
February 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/28401752/water-soluble-polythiophene-for-two-photon-excitation-fluorescence-imaging-and-photodynamic-therapy-of-cancer
#11
Minhuan Lan, Shaojing Zhao, Yusheng Xie, Junfang Zhao, Liang Guo, Guangle Niu, Ying Li, Hongyan Sun, Hongyan Zhang, Weimin Liu, Jinyuan Zhang, Pengfei Wang, WenJun Zhang
Positively-charged water-soluble polythiophene (PT0) that could self-assemble into nanoparticles in pure water solution was designed and synthesized. PT0 exhibited high photo- and pH stabilities, excellent biocompatibility, strong 1O2 generation capability and large two-photon absorption cross sections. Moreover, we showed that the fluorescence of PT0 was unaffected by the interference of biomolecules and metal ions. As an example application, PT0 was demonstrated to be capable of simultaneous cell imaging and photodynamic therapy under either one-photon or two-photon excitation modes...
April 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28401206/recent-advances-in-carbon-based-nanosystems-for-cancer-theranostics
#12
REVIEW
Shine Augustine, Jay Singh, Manish Srivastava, Monica Sharma, Asmita Das, Bansi D Malhotra
One of the major challenges in our contemporary society is to facilitate healthy life for all human beings. In this context, cancer has become one of the most deadly diseases around the world, and despite many advances in theranostics techniques the treatment of cancer still remains an important problem. With recent advances made in the field of nano-biotechnology, carbon-based nanostructured materials have drawn special attention because of their unique physicochemical properties, giving rise to great potential for the diagnosis and therapy of cancer...
April 12, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28397487/design-and-proof-of-programmed-5-aminolevulinic-acid-prodrug-nanocarriers-for-targeted-photodynamic-cancer-therapy
#13
Jina Wu, Haijie Han, Qiao Jin, Zuhong Li, Huan Li, Jian Ji
5-Aminolevulinic acid (ALA), the precursor of photosensitizer protoporphyrin IX (PpIX), is a U.S. FDA-approved photodynamic therapeutic agent. However, realizing efficient delivery of ALA is still a big challenge as it is hydrophilic and cannot be recognized and selectively accumulated in tumor cells. In this study, matrix metalloproteinase-2 (MMP-2) and pH dual-sensitive ALA prodrug nanocarriers were constructed as a programmed delivery strategy for the targeted delivery of ALA. The nanocarriers were prepared by the co-modification of gold nanoparticles (AuNPs) with hydrazone-linked ALA and MMP-2-activatable cell-penetrating peptides (CPPs)...
April 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28396099/management-of-isolated-locoregional-recurrences%C3%A2-in-breast-cancer-a-review-of-local%C3%A2-and-systemic-modalities
#14
REVIEW
Tabassum Wadasadawala, Rohit Vadgaonkar, Jyoti Bajpai
Locoregional recurrence (LRR) after adequate treatment of primary breast cancer poses a therapeutic challenge. Advances in the management of breast cancer have led to significant improvements in survival. With this advantage, it is observed that the incidence of LRR has relatively decreased. Systemic involvement should be ruled out in patients presenting with locoregionally recurrent disease, as isolated LRR requires a treatment with curative intent. Salvage mastectomy following ipsilateral breast tumor recurrence is a time-tested treatment option and widely accepted...
March 21, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/28392376/endoplasmic-reticulum-targeting-photosensitizer-hypericin-confers-chemo-sensitization-towards-oxaliplatin-through-inducing-pro-death-autophagy
#15
Shengchao Lin, Liyan Yang, Haiyang Shi, Wenpei Du, Yingxue Qi, Cen Qiu, Xin Liang, Weibin Shi, Jianwen Liu
Hypericin is an endoplasmic reticulum (ER)-located photosensitizer, which causes oxidative damage to ER during photodynamic therapy (PDT). Hypericin-mediated PDT (HY-PDT) has been confirmed to enhance chemo-sensitivity of oxaliplatin (L-OHP) in colon cancer cells. The present study reveals that autophagy plays a key role in chemosensitization during HY-PDT. We proved pro-death autophagy was required for sensitization and HY-PDT/L-OHP antitumor synergism. High dosage of HY-PDT induced autophagic cell death; while low dose of HY-PDT predominantly triggered protective autophagy and promoted cell proliferation...
April 6, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28391106/near-infrared-light-mediated-dox-ucnps-mhtio2-nanocomposite-for-chemo-photodynamic-therapy-and-imaging
#16
Yuhua Chen, Huiming Lin, Ruihan Tong, Na An, Fengyu Qu
Recently, incorporating multiple components into one nanoplatform for anticancer theranostics has attracted most attention. Herein, a rattle-structured nanocomposite by using UCNPs (NaYF4:Yb,Tm@NaYF4) as core coated with hollow mesoporous TiO2 (UCNPs@mHTiO2) was constructed as the nanocarrier. First, UCNPs@SiO2@TiO2 was prepared, by a selective etching method to remove SiO2 shell, to make sure the hollow mesoporous structure and high surface area (347m(2)g(-1)) of UCNPs@mHTiO2. Under near-infrared (NIR) light irradiation, the UV emission can excite TiO2 to produce ROS and to realize photodynamic therapy (PDT)...
March 18, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28389371/cus-nanoagents-for-photodynamic-and-photothermal-therapies-phenomena-and-possible-mechanisms
#17
Lihua Li, Leila H Rashidi, Mengyu Yao, Lun Ma, Lingling Chen, Junying Zhang, Yu Zhang, Wei Chen
Photodynamic therapy (PDT) and photothermal therapy (PTT) have been emerging as attractive and promising methods for tumor treatment in clinical approaches. CuS nanoparticles are effective and cost-effective agents for PTT. Recently, it was observed that CuS nanoparticles are also excellence candidates for PDT. However, the mechanisms for CuS nanoparticles as PDT agents have never been discussed. The goal here is to explore the killing mechanisms of CuS nanoparticles as PTT and PDT agents. CuS nanoparticles were synthesized by a simple wet chemistry method by coating with amphiphilic polymer and examined for their therapeutic potential on lung adenocarcinoma cell line SPC-A-1 in vitro and in vivo using a murine cancer model...
April 4, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28378992/targeted-chemo-photodynamic-combination-platform-based-on-the-dox-prodrug-nanoparticles-for-enhanced-cancer-therapy
#18
Yumin Zhang, Fan Huang, Chunhua Ren, Lijun Yang, Jianfeng Liu, Zhen Cheng, Liping Chu, Jinjian Liu
Chemo-photodynamic combination therapy has been received widespread attention in cancer treatment due to its excellent characteristics, such as reducing the adverse side effects of chemo-drugs and improving the therapeutic effects for various cancers. In this study, RGD and DOX was conjugated to PEG by thiol-ene addition and Schiff's base reaction, respectively, to prepare the targeted and pH-sensitive antitumor prodrug nanoparticles (RGD-PEG-DOX NPs, RGD-NPs). Subsequently, the photosensitizer chlorin e6 (Ce6) was encapsulated into RGD-NPs, thus obtaining a simple and efficient chemo-photodynamic combination platform (RGD-PEG-DOX/Ce6 NPs, RGD-NPs/Ce6)...
April 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28374954/multifunctional-gadolinium-doped-mesoporous-tio2-nanobeads-photoluminescence-enhanced-spin-relaxation-and-reactive-oxygen-species-photogeneration-beneficial-for-cancer-diagnosis-and-treatment
#19
Roghayeh Imani, Ralf Dillert, Detlef W Bahnemann, Meysam Pazoki, Tomaž Apih, Veno Kononenko, Neža Repar, Veronika Kralj-Iglič, Gerrit Boschloo, Damjana Drobne, Tomas Edvinsson, Aleš Iglič
Materials with controllable multifunctional abilities for optical imaging (OI) and magnetic resonant imaging (MRI) that also can be used in photodynamic therapy are very interesting for future applications. Mesoporous TiO2 sub-micrometer particles are doped with gadolinium to improve photoluminescence functionality and spin relaxation for MRI, with the added benefit of enhanced generation of reactive oxygen species (ROS). The Gd-doped TiO2 exhibits red emission at 637 nm that is beneficial for OI and significantly improves MRI relaxation times, with a beneficial decrease in spin-lattice and spin-spin relaxation times...
April 4, 2017: Small
https://www.readbyqxmd.com/read/28374020/current-state-and-future-of-photodynamic-therapy-for-the-treatment-of-head-and-neck-squamous-cell-carcinoma
#20
Christina Mimikos, Gal Shafirstein, Hassan Arshad
Photodynamic therapy has shown promise in the treatment of early head and neck squamous cell carcinoma (SCC). In photodynamic therapy (PDT), a light sensitive drug (photosensitizer) and visible light cause cancer cell death by the creation of singlet oxygen and free radicals, inciting an immune response, and vascular collapse. In this paper, we review several studies that demonstrate the effectiveness of PDT in the treatment of early stage SCC of the head and neck, with some showing a similar response rate to surgery...
June 2016: World J Otorhinolaryngol Head Neck Surg
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