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https://www.readbyqxmd.com/read/28722451/-basal-cell-carcinoma-and-the-modalities-of-its-therapy
#1
Petr Arenberger, Jiří Ettler
Basal cell carcinoma (BCC) also known as basalioma or basal cell cancer, is the most common skin cancer. BCC has a very low metastatic risk. This tumor can cause significant disfigurement by invading surrounding tissues. It occurs mainly in fair-skinned patients with a family history of this cancer. Sunlight is a factor in about two-thirds of these cancers. Standard surgical excision is the treatment of choice. Mohs micrographic surgery is an outpatient or inpatient procedure in which the tumor is surgically excised and then immediately examined under a microscope...
2017: Casopís Lékar̆ů C̆eských
https://www.readbyqxmd.com/read/28716739/phototoxicity-in-a-laryngeal-cancer-cell-line-enhanced-by-a-targeting-amphiphilic-chlorin-photosensitizer
#2
Milene N O Moritz, Carlos Rossa, Kleber T de Oliveira, Marciana P Uliana, Janice R Perussi
BACKGROUND: Photodynamic therapy (PDT) has been established in several countries as an alternative therapy for the treatment of various malignancies. This therapy involves the incorporation of a photosensitizer (PS) that is activated by visible light and form reactive oxygen species leading to target cell death by apoptosis or necrosis. Previously, our group has demonstrated that CHL-T (semi-synthesized from chlorophyll a and containing a linked solubilizing group TRISMA(®)) presented a pronounced potential to induce death in HeLa cell line after PDT...
July 14, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28716738/photodynamic-therapy-and-pain-a-systematic-review
#3
Jennifer Maria Ang, Irbaz Bin Riaz, Muhammad Umar Kamal, Gyorgy Paragh, Nathalie C Zeitouni
Photodynamic therapy (PDT) is an effective treatment for actinic keratoses and early skin cancers, and the only office procedure to control field cancerization. Procedure-associated pain limits widespread PDT use and by early termination of treatment can decrease overall therapeutic efficacy. Here we review and assess reported interventions on PDT-associated pain, in order to identify the most promising methods to manage treatment-associated pain and identify focus for future studies. Literature search was performed using MEDLINE, EMBASE, and the Cochrane Library by two independent reviewers to select publications that assessed and compared pain quantitatively during PDT treatment for actinic keratoses, basal cell carcinomas, and/or in situ squamous cell carcinomas...
July 14, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28715120/characterization-of-a-multiple-particle-delivery-complex-and-determination-of-cellular-photodamage-in-skin-fibroblast-and-breast-cancer-cell-lines
#4
Ivan Mfouo-Tynga, Nicolette Nadene Houreld, Heidi Abrahamse
Zinc metallized Phthalocyanine (ZnPcSmix ), a potent photosensitizer (PS), is conjugated to gold dendrimer encapsulated nanoparticles (AuDENPs) in order to improve the efficacy of Photodynamic therapy (PDT) using MCF-7 breast cancer cells and WS1 fibroblast cells as a control. Both ZnPcSmix and AuDENPs are mixed in a nitrogen atmosphere for 48 h and characterization analysis conducted using ultra violet visible (UV-vis) spectrometry for spectral properties, transmission electron microscopy (TEM) for morphological features and zeta potential measurement for surface stability and size distribution of the compound obtained or of the multiple particles delivery complex (MPDC)...
July 17, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28713002/photo-stimulation-of-persistent-luminescence-nanoparticles-enhances-cancer-cells-death
#5
Gonzalo Ramírez-García, Minerva Martínez-Alfaro, Fanny d'Orlyé, Fethi Bedioui, Nathalie Mignet, Anne Varenne, Silvia Gutiérrez-Granados, Cyrille Richard
Persistent luminescence nanoparticles made of ZnGa1.995Cr0.005O4 (ZGO-NPs) are innovative nanomaterials that emit photons during long periods of time after the end of the excitation, allowing their use as diagnosis probes for in vivo optical imaging. During the excitation process, a part of the energy is stored in traps to further emit photons over long time. However, we observed in this study that some of the energy reduces molecular oxygen to produce reactive oxygen species (ROS). Following this observation, theoxidative stress induction and cytotoxic effects of these NPs were investigated on human breast cancer cells...
July 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28708430/natural-extracellular-nanovesicles-and-photodynamic-molecules-is-there-a-future-for-drug-delivery
#6
Katsuyuki Kusuzaki, Takao Matsubara, Hiroaki Murata, Mariantonia Logozzi, Elisabetta Iessi, Rossella Di Raimo, Fabrizio Carta, Claudiu T Supuran, Stefano Fais
Photodynamic molecules represent an alternative approach for cancer therapy for their property (i) to be photo-reactive; (ii) to be not-toxic for target cells in absence of light; (iii) to accumulate specifically into tumour tissues; (iv) to be activable by a light beam only at the tumour site and (v) to exert cytotoxic activity against tumour cells. However, to date their clinical use is limited by the side effects elicited by systemic administration. Extracellular vesicles are endogenous nanosized-carriers that have been recently introduced as a natural delivery system for therapeutic molecules...
December 2017: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/28708389/nanostructured-phthalocyanine-assemblies-with-protein-driven-switchable-photoactivities-for-biophotonic-imaging-and-therapy
#7
Xingshu Li, C-Yoon Kim, Seunghyun Lee, Dayoung Lee, Hyung Min Chung, Gyoungmi Kim, Si-Hyun Heo, Chulhong Kim, Ki-Sung Hong, Juyoung Yoon
Switchable phototheranostic nanomaterials are of particular interest for specific biosensing, high-quality imaging, and targeted therapy in the field of precision nanomedicine. Here, we develop a "one-for-all" nanomaterial that self-assembles from flexible and versatile phthalocyanine building blocks. The nanostructured phthalocyanine assemblies (NanoPcTBs) display intrinsically unique photothermal and photoacoustic properties. Fluorescence and reactive oxygen species (ROS) generation can be triggered depending on a targeted, protein-induced, partial disassembly mechanism, which creates opportunities for low-background fluorescence imaging and activatable photodynamic therapy (PDT)...
July 14, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28702557/synthesis-characterization-and-in-vitro-and-in-vivo-photodynamic-activities-of-a-gallium-iii-tris-ethoxycarbonyl-corrole
#8
Zhao Zhang, Hua-Hua Wang, Hua-Jun Yu, Yu-Zhen Xiong, Hai-Tao Zhang, Liang-Nian Ji, Hai-Yang Liu
Corroles have been previously demonstrated to be a new and promising photosensitizer (PS) in photodynamic therapy (PDT) for cancer cells. This research reported the preparation of an electron-deficient flat gallium(iii) tris(ethoxycarbonyl)corrole (1-Ga). Its in vitro PDT activities towards different cancer cell lines were examined, and the best PDT activity was observed in A549 cell lines. 1-Ga could penetrate the cell membrane rapidly and exhibit remarkable photo-cytotoxicity. 1-Ga can induce A549 cell apoptosis via ROS-mediated mitochondrial pathways, in which p38 and sirt-1 proteins play a key role...
July 12, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28700898/sub-100nm-long-tumor-retention-sn-38-loaded-photonic-micelles-for-tri-modal-cancer-therapy
#9
Xixiao Yang, Xiangdong Xue, Yan Luo, Tzu-Yin Lin, Hongyong Zhang, Diana Lac, Kai Xiao, Yixuan He, Bei Jia, Kit S Lam, Yuanpei Li
The tumor penetration and accumulation of nanoparticle-based drug delivery systems are highly dependent on the particle size. Nanomedicines in the sub-100nm range have been suggested by previous studies to have superior antitumor efficacy on various solid tumors. SN-38 is a very important and highly potent drug for several cancers including colon cancer. However, due to the ultra-flat aromatic structure of SN-38, it is typically very difficult to produce sub-100nm, SN-38-encapsulated nanoparticles without modification of the chemical structure...
July 9, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28700237/rgd-modified-albumin-nanoconjugates-for-targeted-delivery-of-a-porphyrin-photosensitizer
#10
Fang Li, Yan Zhao, Chengqiong Mao, Yi Kong, Xin Ming
Advances in photodynamic therapy of cancer have been restrained by lack of cancer specificity and side effects to normal tissues. Molecularly targeted photodynamic therapy can achieve higher cancer specificity by combination of active cancer targeting and localized laser activation. We aimed to use albumin as a carrier to prepare targeted nanoconjugates that are selective to cancer cells and smaller than conventional nanoparticles for superior tumor penetration. IRDye® 700DX (IR700), a porphyrin photosensitizer, was covalently conjugated to human serum albumin that was also linked with tumor-targeting RGD peptides...
July 12, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28699738/a-molecular-combo-of-zinc-ii-phthalocyanine-and-tamoxifen-derivative-for-dual-targeting-photodynamic-therapy-and-hormone-therapy
#11
Fengling Zhang, Meiru Song, Gan-Kun Yuan, Huannian Ye, Ye Tian, Mingdong Huang, Jinping Xue, Zhihong Zhang, Jianyong Liu
The combination of photodynamic therapy and other cancer treatment modalities is a promising strategy to enhance therapeutic efficacy and reduce side effects. In this study, a tamoxifen-zinc(II) phthalocyanine conjugate linked by a triethylene glycol chain has been synthesised and characterised. Having tamoxifen as the targeting moiety, the conjugate shows high specific affinity to MCF-7 breast cancer cells overexpressed estrogen receptors (ER) and tumor tissues, therefore leading to a cytotoxic effect in the dark due to the cytostatic tamoxifen moiety, and a high photocytotoxicity due to the photosensitising phthalocyanine unit against the MCF-7 cancer cells...
July 12, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28693822/corrigendum-to-cisplatin-and-photodynamic-therapy-exert-synergistic-inhibitory-effects-on-small-cell-lung-cancer-cell-viability-and-xenograft-tumor-growth-biochem-biophys-res-comm-489-3-2017-567-572
#12
You-Shuang Cheng, Yin-Bo Peng, Min Yao, Ji-Ping Teng, Da Ni, Zhi-Jun Zhu, Bu-Feng Zhuang, Zhi-Yin Yang
No abstract text is available yet for this article.
July 7, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28693272/metformin-enhances-the-cytotoxicity-of-5-aminolevulinic-acid-mediated-photodynamic-therapy-in-vitro
#13
Tomohiro Osaki, Inoru Yokoe, Kiwamu Takahashi, Katsushi Inoue, Masahiro Ishizuka, Tohru Tanaka, Kazuo Azuma, Yusuke Murahata, Takeshi Tsuka, Norihiko Itoh, Tomohiro Imagawa, Yoshiharu Okamoto
The biguanide metformin is a drug widely used for the treatment of type 2 diabetes. Metformin enhances the cytotoxicity of chemotherapy by promoting the adenosine monophosphate-activated protein kinase (AMPK) autophagy signaling pathway. Photodynamic therapy (PDT) with 5-aminolevulinic acid (5-ALA), a precursor of protoporphyrin IX (PpIX), leads to apoptosis when PpIX accumulates in the mitochondria, and also leads to autophagy through activation of AMPK. In the present study, the effect of metformin in combination with 5-ALA-PDT was evaluated in vitro in KLN205 lung cancer cells...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28686960/photodynamic-therapy-with-tmpyp-porphyrine-induces-mitotic-catastrophe-and-microtubule-disorganization-in-hela-and-g361-cells-a-comprehensive-view-of-the-action-of-the-photosensitizer
#14
Věra Cenklová
Photodynamic therapy (PDT) is a useful tool against cancer and various other diseases. PDT is capable to induce different cell death mechanisms, due to the PDT evoked reactive oxygen species (ROS) production and is dose dependent. It is known that cytoskeleton is responsible for numerous cell functions, including cell division, maintenance of cell shape, their adhesion ability and movement. PDT initiated redistribution and subsequent disintegration of cytoskeletal components that precedes cell death. Here was present our results in HeLa and G361 cells subjected to sublethal PDT treatments using α,β,χ,δ porphyrin-Tetrakis (1-methylpyridinium-4-yl) p-Toluenesulfonate porphyrin (TMPyP)...
June 27, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28686273/photosensitizer-ps-polyhedral-oligomeric-silsesquioxane-poss-crosslinked-nanohybrids-for-enhanced-imaging-guided-photodynamic-cancer-therapy
#15
Ya-Xuan Zhu, Hao-Ran Jia, Zhan Chen, Fu-Gen Wu
Photodynamic therapy (PDT) has drawn extensive attention as a promising cancer treatment modality. However, most PDT nanoagents suffer from insufficient drug loading capacity, a severe self-quenching effect, premature release of drugs and/or potential toxicity. Herein, we rationally designed an inorganic-organic nanohybrid with high drug loading capacity and superior chemical stability for enhanced PDT. Polyhedral oligomeric silsesquioxane (POSS), an amine-containing cage-shaped building block, was crosslinked with chlorin e6 (Ce6), a carboxyl-containing photosensitizer, via the amine-carboxyl reaction...
July 7, 2017: Nanoscale
https://www.readbyqxmd.com/read/28685676/recent-advances-in-superparamagnetic-iron-oxide-based-nanoprobes-as-multifunctional-theranostic-agents-for-breast-cancer-imaging-and-therapy
#16
Jianjun Zheng, Wenzhi Ren, Tianxiang Chen, Jin Yinhua, Aijing Li, Kun Yan, Yijiao Wu, Aiguo Wu
Breast cancer accounts for nearly one in three cancers, and it is the most common cancer diagnosed among women. The death rate of breast cancer is estimated to 14%. Hence, accurate diagnosis in early stage and effective treatment in any stage are critical for the survival of breast cancer. Mammogram has been the most common technique administered to detect breast cancer. However, the radiation dose from mammogram is harmful to patients. Fortunately, magnetic resonance imaging (MRI) can diagnose breast cancer without any radiation dose, and enhanced MRI can make earlier and differential diagnosis...
July 5, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28682604/extending-the-excitation-wavelength-of-potential-photosensitizers-via-appendage-of-a-kinetically-stable-terbium-iii-macrocyclic-complex-for-applications-in-photodynamic-therapy
#17
Phuc Ung, Michèle Clerc, Huaiyi Huang, Kangqiang Qiu, Hui Chao, Michael Seitz, Ben Boyd, Bim Graham, Gilles Gasser
The development of viable photodynamic therapy protocols is often hindered by photosensitizers that require high-energy UV irradiation that has limited potential for clinical use due to its low tissue penetration. Herein, we report a strategy for extending the excitation wavelength of potential photosensitizers via the covalent attachment of a terbium(III)-1,4,7,10-tetraazacyclododecane-1,4,7-triacetate complex (DO3A-Tb). The method was systematically demonstrated with a series of polycyclic aromatic hydrocarbons (naphthalene, phenanthrene, anthracene, pyrene, and fluoranthene) to prepare six new complexes (Tb1-Tb6) with bathochromic shifts that extended into the visible region...
July 17, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28681887/manipulating-tumor-hypoxia-toward-enhanced-photodynamic-therapy-pdt
#18
Juanjuan Dang, Hua He, Donglai Chen, Lichen Yin
Photodynamic therapy (PDT) is considered a promising approach for the treatment of cancer and is achieved via the photosensitizer (PS)-mediated incomplete reduction of oxygen upon light irradiation, which generates high levels of reactive oxygen species (ROS) to induce potent vascular damage and to directly kill tumor cells. However, there is an undesirable impediment with this approach in that tumor tissues generally suffer from serious hypoxia, which significantly affects the efficiency of PDT. Additionally, PDT that consumes oxygen will further aggravate tumor hypoxia, thus potentially leading to multiple undesirable consequences, such as angiogenesis, tumor invasiveness, and tumor metastasis...
July 6, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28681663/graphene-oxide-methylene-blue-nanocomposite-in-photodynamic-therapy-of-human-breast-cancer
#19
Reza Hosseinzadeh, Khatereh Khorsandi, Ghader Hosseinzadeh
The interaction of methylene blue (MB) as a photosensitizer with graphene oxide nano-sheets (GO) was examined in aqueous solution using UV-vis spectrophotometric techniques. MB-GO composites were prepared by mixing the solutions of GO nano-sheets and methylene blue due to interacting of the cationic methylene blue photosensitizer via electrostatic and π-π stacking or hydrophobic cooperative interactions. The cell killing potential of nanocomposite was examined on the MDA-MB-231 breast cancer cells in the absence and presence of red LED irradiation...
July 6, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28679107/macrophage-selective-photodynamic-therapy-by-meta-tetra-hydroxyphenyl-chlorin-loaded-polymeric-micelles-a-possible-treatment-for-cardiovascular-diseases
#20
Jos W H Wennink, Yanna Liu, Petri I Mäkinen, Francesca Setaro, Andrès de la Escosura, Meriem Bourajjaj, Jari P Lappalainen, Lari P Holappa, Joep B van den Dikkenberg, Mina Al Fartousi, Panagiotis N Trohopoulos, Seppo Ylä-Herttuala, Tomas Torres, Wim E Hennink, Cornelus F van Nostrum
Selective elimination of macrophages by photodynamic therapy (PDT) is a new and promising therapeutic modality for the reduction of atherosclerotic plaques. m-Tetra(hydroxyphenyl)chlorin (mTHPC, or Temoporfin) may be suitable as photosensitizer for this application, as it is currently used in the clinic for cancer PDT. In the present study, mTHPC was encapsulated in polymeric micelles based on benzyl-poly(ε-caprolactone)-b-methoxy poly(ethylene glycol) (Ben-PCL-mPEG) using a film hydration method, with loading capacity of 17%...
July 2, 2017: European Journal of Pharmaceutical Sciences
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