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https://www.readbyqxmd.com/read/29150332/organic-arsenicals-target-thioredoxin-reductase-followed-by-oxidative-stress-and-mitochondrial-dysfunction-resulting-in-apoptosis
#1
Xiao-Yang Fan, Yu-Jiao Liu, Kai Chen, Feng-Lei Jiang, Yan-Jun Hu, Dan Liu, Yi Liu, Yu-Shu Ge
Considering the vital role of cellular redox state, more and more researches focus on the design of drugs targeting thioredoxin reductase (TrxR), an important enzyme in maintaining the balance of cellular redox. Here two organic arsenicals, 2-(((4-(1,3,2-dithiarsinan-2-yl) phenyl) imino) methyl) phenol (PIM-PAO-PDT) and N-(4-(1,3,2-dithiarsinan-2-yl) phenyl)-2-hydroxybenzamide (PAM-PAO-PDT), bearing the S-As-S chemical scaffold and different linking groups have been synthesized, and both of them show the better inhibitory activity and selectivity towards HL-60 cells...
May 6, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29147654/susceptibility-of-in-vitro-melanoma-skin-cancer-to-photoactivated-hypericin-versus-aluminium-iii-phthalocyanine-chloride-tetrasulphonate
#2
I M Ndhundhuma, H Abrahamse
The sensitivity of human melanoma cells to photoactivated Hypericin (Hyp) compared to aluminium(III) phthalocyanine chloride tetrasulphonate (AlPcS4Cl) is reported in this study. Melanoma cells (A375 cell line) were treated with various concentrations of Hyp or AlPcS4Cl alone, for 1, 4, and 24 hrs; varying doses of laser irradiation alone (594 or 682 nm); or optimal concentrations of PSs combined with laser irradiation. Changes in cell morphology, viability, membrane integrity, and proliferation after treatment of cells were determined using inverted microscopy, Trypan blue cell exclusion, Lactate Dehydrogenase (LDH) membrane integrity, and adenosine triphosphate (ATP) cell proliferation assay, respectively...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29147483/sonophotodynamic-therapy-mediated-by-liposomal-zinc-phthalocyanine-in-a-colon-carcinoma-tumor-model-role-of-irradiating-arrangement
#3
Maryam Bakhshizadeh, Toktam Moshirian, Habibollah Esmaily, Omid Rajabi, Hooriyeh Nassirli, Ameneh Sazgarnia
Objectives: Low penetration depth of light is the main defect of photodynamic therapy (PDT), which could be improved by sonodynamic therapy (SDT). In this study, a combination of PDT and SDT known as sonophotodynamic therapy (SPDT) was investigated using two reverse arrangements in CT26 tumor model. Materials and Methods: The liposomal zinc phthalocyanine was synthesized and characterized. It was then administered to CT26 tumor models as a sensitizer. The animal models were subjected to PDT, SDT, and the combined treatment in different groups...
October 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29146972/specific-targeting-of-melanotic-cells-with-peptide-ligated-photosensitizers-for-photodynamic-therapy
#4
Paul Lorenz Bigliardi, Bhimsen Rout, Aakanksha Pant, Viknish Krishnan-Kutty, Alex N Eberle, Ramasamy Srinivas, Brendan Adrian Burkett, Mei Bigliardi-Qi
A strategy combining covalent conjugation of photosensitizers to a peptide ligand directed to the melanocortin 1 (MC1) receptor with the application of sequential LED light dosage at near-IR wavelengths was developed to achieve specific cytotoxicity to melanocytes and melanoma (MEL) with minimal collateral damage to surrounding cells such as keratinocytes (KER). The specific killing of melanotic cells by targeted photodynamic therapy (PDT) described in this study holds promise as a potentially effective adjuvant therapeutic method to control benign skin hyperpigmentation or superficial melanotic malignancy such as Lentigo Maligna Melanoma (LMM)...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29145577/photodynamic-therapy-leads-to-time-dependent-regression-of-pathologic-corneal-lymph-angiogenesis-and-promotes-high-risk-corneal-allograft-survival
#5
Yanhong Hou, Viet Nhat Hung Le, Thomas Clahsen, Ann-Charlott Schneider, Felix Bock, Claus Cursiefen
Purpose: Pathologic corneal (lymph) angiogenesis is a known risk factor for immune-mediated allograft rejections after corneal transplantation. However, there is no established treatment to regress pre-existing pathological corneal blood and lymphatic vessels. This study assessed the possibility to regress both vessel types by photodynamic therapy (PDT) after intravenous (i.v.) verteporfin injection, the influence of timing of PDT after verteporfin injection, and the effect on graft survival in high-risk keratoplasty...
November 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29145431/effects-of-periodontitis-on-the-development-of-asthma-the-role-of-photodynamic-therapy
#6
Larissa Carbonera Candeo, Nicole Cristine Rigonato-Oliveira, Aurileia Aparecida Brito, Rodrigo Labat Marcos, Cristiane Miranda França, Kristianne Porta Santos Fernandes, Raquel Agnelli Mesquita-Ferrari, Sandra Kalil Bussadori, Rodolfo Paula Vieira, Adriana Lino-Dos-Santos-Franco, Ana Paula Ligeiro-Oliveira, Anna Carolina Ratto Tempestini Horliana
To evaluate whether periodontitis modulates lung inflammation in an experimental model of asthma as well as the photodynamic therapy (PDT) is associated with a reduction of lung inflammation. Seventy-two BALB/c male mice (~2 months) were randomly divided into 8 groups (n = 9): Basal, Periodontitis (P), P+PT, P+PT+PDT, Asthma (A), A+P, A+P+PT, and A+P+PT+PDT. Periodontitis was induced by using the ligature technique and asthma was induced by ovalbumin (OVA). PT was performed with curettes and PDT with methylene blue (0...
2017: PloS One
https://www.readbyqxmd.com/read/29143339/cell-death-pathways-associated-with-photodynamic-therapy-an-update
#7
David Kessel, Nancy L Oleinick
Photodynamic therapy (PDT) has the potential to make a significant impact on cancer treatment. PDT can sensitize malignant tissues to light, leading to a highly selective effect if an appropriate light dose can be delivered. Variations in light distribution and drug delivery, along with impaired efficacy in hypoxic regions, can reduce the overall tumor response. There is also evidence that malignant cells surviving PDT may become more aggressive than the initial tumor population. Promotion of more effective direct tumor eradication is therefore an important goal...
November 16, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29143338/extracellular-matrix-containing-in-vitro-three-dimensional-tumour-models-in-photodynamic-therapy-related-research
#8
Beata Čunderlíková
Three-dimensional (3D) tumour models have been intensively evaluated for their use in cancer research and there is a strong rationale behind using 3D cell cultures in photodynamic therapy (PDT)-related experimentation. In this contribution, it is explained why 3D cell cultures containing extracellular matrix (ECM) are preferred for this purpose. Results of experimental studies utilizing ECM-containing 3D cellular models in PDT research are summarized. Finally, design of in vitro 3D models that would provide clinically relevant information is discussed...
November 16, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29142997/advanced-smart-photosensitizers-for-more-effective-cancer-treatment
#9
Wooram Park, Soojeong Cho, Jieun Han, Heejun Shin, Kun Na, Byeongdu Lee, Dong-Hyun Kim
Photodynamic therapy (PDT) based upon the use of light and photosensitizers (PSs) has been used as a novel treatment approach for a variety of tumors. It, however, has several major limitations in the clinic: poor water solubility, long-term phototoxicity, low tumor targeting efficacy, and limited light penetration. With advances in nanotechnology, materials science, and clinical interventional imaging procedures, various smart-PSs have been developed for improving their cancer-therapeutic efficacy while reducing the adverse effects...
November 16, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/29142604/klotho-expression-is-correlated-to-molecules-associated-with-epithelial-mesenchymal-transition-in-lung-squamous-cell-carcinoma
#10
Takayuki Ibi, Jitsuo Usuda, Tatsuya Inoue, Akira Sato, Kyoshiro Takegahara
Klotho is known as an anti-aging gene. We previously reported that the expression of Klotho is a postoperative prognostic factor for patients with lung large cell neuroendocrine carcinoma and lung small cell carcinoma. Recently, Klotho was shown to suppress the epithelial-mesenchymal transition (EMT). In the present study, we examined the association between the expression of Klotho and the regulation of EMT in lung squamous cell carcinoma. We immunohistochemically examined the expression of Klotho in patients with lung squamous cell carcinoma who had undergone surgical resection or photodynamic therapy...
November 2017: Oncology Letters
https://www.readbyqxmd.com/read/29141833/comparative-study-of-the-clinical-histological-and-biological-characteristics-of-squamous-cell-carcinomas-in-areas-previously-treated-with-photodynamic-therapy
#11
Tamara Gracia Cazaña, Nerea Salazar, Jesús Vera-Álvarez, Salvador González, Angeles Juarranz, Yolanda Gilaberte
Although photodynamic therapy (PDT) is an effective treatment option for non-melanoma skin cancer, the development of aggressive tumours in PDT-treated areas has been described. To evaluate the clinical, histological, and biological characteristics of squamous cell carcinomas (SCCs) in areas previously treated with PDT vs those arising in areas never treated with this therapeutic modality. A retrospective observational study was designed. We collected all cases of invasive SCCs in areas previously treated with PDT...
November 15, 2017: European Journal of Dermatology: EJD
https://www.readbyqxmd.com/read/29139000/effect-of-light-polarization-on-the-efficiency-of-photodynamic-therapy-of-basal-cell-carcinomas-an-in-vitro-cellular-study
#12
M JalalKamali, S N Nematollahi-Mahani, M Shojaei, A Shamsoddini, N Arabpour
In an in vitro study, the effect of light polarization on the efficiency of 5-aminolaevulinic acid (ALA) photodynamic therapy (PDT) of basal cell carcinoma (BCC) was investigated. Three states of light polarization (non-polarized, linearly polarized, and circularly polarized) were considered. Cells were exposed to green (532 pm 20 nm) irradiation from light emitting diodes. Cell survival was measured by the colorimetric assay (WST-1) and Trypan blue staining. The colorimetric assay showed a pronounced decrease in the cell viability (up to 30%) using polarized light compared to the non-polarized one in the wavelength region used...
November 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29136341/photodynamic-therapy-and-nuclear-imaging-activities-of-zinc-phthalocyanine-integrated-tio2-nanoparticles-in-breast-and-cervical-tumors
#13
Fatma Yurt, Kasim Ocakoglu, Mine Ince, Suleyman Gokhan Colak, Ozge Er, Hale Melis Soylu, Cumhur Gunduz, Cıgır Biray Avci, Cansu Caliskan Kurt
In recent years, phthalocyanines (Pcs) have been widely used as photosensitizer in photodynamic therapy applications. Because of their strong absorptions in the near-infrared region (640-700 nm). The integration of phthalocyanine derivatives to a nanoparticle is expected to be efficient way to improve the activity of the photosensitizer on the targeted tissue. It is known that the integrated molecules not only show better accumulation on tumor tissue but also reduce toxicity in healthy tissues. In this study, the ZnPc molecule was synthesized and integrated to the TiO2 nanoparticle, to investigate the potential of PDT and its cytotoxicity...
November 14, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/29136306/patient-and-physician-satisfaction-in-an-observational-study-with-methyl-aminolevulinate-daylight-photodynamic-therapy-in-the-treatment-of-multiple-actinic-keratoses-of-the-face-and-scalp-in-6-european-countries
#14
M C Fargnoli, S H Ibbotson, R E Hunger, G Rostain, M T W Gaastra, L Eibenschutz, C Cantisani, A W Venema, S Medina, N Kerrouche, B Pérez-Garcia
BACKGROUND: Guidelines recommend treating actinic keratoses (AK) as they are recognized as precursors of invasive squamous cell carcinoma. OBJECTIVE: The objective of this study was to collect real-world clinical data on the use of methyl aminolevulinate daylight-photodynamic therapy (MAL DL-PDT) for the treatment of face and scalp AK in Europe. METHODS: A prospective, multicenter, non-interventional study was conducted in 6 European countries in patients receiving a single treatment of MAL DL-PDT for face and/or scalp AK...
November 14, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/29131474/photodynamic-therapy-with-double-duration-for-circumscribed-choroidal-haemangioma-functional-and-anatomical-results-based-on-initial-parameters
#15
Daniela Süsskind, Werner Inhoffen, Faik Gelisken, Michael Völker
IMPORTANCE: Pretreatment symptoms longer than twelve months and foveal cystoid changes are indicators for poor anatomical and functional outcome after photodynamic therapy. BACKGROUND: To evaluate the prognostic factors on the effectiveness of photodynamic therapy with double duration for treatment of exudative circumscribed choroidal haemangioma DESIGN: Retrospective study. PARTICIPANTS: Twenty-seven patients with symptomatic exudative circumscribed choroidal haemangioma treated with photodynamic therapy...
November 13, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/29131243/photodynamic-therapy-with-5-aminolevulinic-acid-suppresses-ifn-%C3%AE-induced-k17-expression-in-hacat-cells-via-mapk-pathway
#16
X-L Wang, Q Sun
OBJECTIVE: Psoriasis is a chronic inflammatory skin disorder that greatly affects the patient's quality of life. Photodynamic therapy (PDT) with 5-aminolevulinic acid (ALA) has recently been applied for inflammatory dermatoses including psoriasis. However, the therapeutic effect of ALA-PDT is yet to be validated, and the underlying mechanisms remain unclear. MATERIALS AND METHODS: In this study, a psoriatic model was established by treating HaCaT cells with 250 U/ml IFN-γ for 48 h...
October 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29131032/anti-psoriasis-effects-and-mechanisms-of-%C3%AE-8-quinolinoxy-zinc-phthalocyanine-mediated-photodynamic-therapy
#17
Han-Qing Liu, Ying-Ming Wang, Wan-Fang Li, Chao Li, Zhi-Huan Jiang, Jie Bao, Jin-Feng Wei, Hong-Tao Jin, Ai-Ping Wang
BACKGROUND/AIMS: The aim of this study was to determine the anti-psoriasis effects of α-(8-quinolinoxy) zinc phthalocyanine (ZnPc-F7)-mediated photodynamic therapy (PDT) and to reveal its mechanisms. METHODS: HaCaT cells were used to observe the influence of ZnPc-F7-PDT on cell proliferation in vitro. The in vivo anti-psoriasis effects of ZnPc-F7-PDT were evaluated using a mouse vagina model, a propranolol-induced cavy psoriasis model and an imiquimod (IMQ)-induced nude mouse psoriasis model...
November 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29129543/idiopathic-elastosis-perforans-serpiginosa-with-satisfactory-response-after-5-ala-photodynamic-therapy
#18
S Alique-García, J Company-Quiroga, C Horcajada-Reales, B Echeverría-García, J C Tardío-Dovao, J Borbujo
Photodynamic therapy (PDT) involves the use of photochemical reactions mediated through the interaction of photosensitizing agents, light, and oxygen for the treatment of malignant or benign diseases. Topical photosensitizers employed in dermatology are 5-aminolevulinic acid (5 ALA) and methyl aminolevulinate, classically used for the treatment of superficial non-melanoma skin cancer and their precursors. Recently the efficacy of PDT has been introduced in other benign diseases. Elastosis perforans serpiginosa (EPS) is a rare skin disorder characterized by transepidermal elimination of abnormal elastic fibers...
November 9, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29126959/nanocarriers-as-phototherapeutic-drug-delivery-system-appraisal-of-three-different-nanosystems-in-an-in-vivo-and-in-vitro-exploratory-study
#19
Eduardo Ricci-Junior, Luciana Betzler de Oliveira de Siqueira, Raphaela Aparecida Schuenck Rodrigues, Félix Sancenón, Ramón Martínez-Máñez, João Alfredo de Moraes, Ralph Santos-Oliveira
The use of nanosystem as diagnosing and therapy systems is increasing each year. There are several nanosystems available nowadays and the most prominent ones are: mesoporous silica, nanoemulsion and polymeric nanoparticles due to its characteristics, like low toxicology, and easy-producing process. They all have advantages when compared with the traditional system used, since they show specific targeting, controlled release, and higher penetration. In this study were tested three different nanocarriers (polymeric nanoparticles, nanoemulsion and mesoporous silica) containing phthalocyanineas possible PDT drugs (nanodrugs)...
November 7, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29126958/effects-of-led-based-photodynamic-therapy-using-red-and-blue-lights-with-natural-hydrophobic-photosensitizers-on-human-glioma-cell-line
#20
Zahra Jamali, Sedigheh Marjaneh Hejazi, Seyed Mohsen Ebrahimi, Hemen Moradi-Sardareh, Maliheh Paknejad
Photodynamic therapy (PDT) has received high attention in cancer treatment due to its minimal side effects, specific cancer-targeting, non-invasion and low cost. It utilizes a specific group of anti-cancer drugs called photosensitizers (PS), which can be only activated under a certain wavelength light illumination and kills cancer cells. To screen the potential of PS and setup of PDT treatment protocol, it is essential to assess the PDT efficacy in vitro. In this study, a light-emitting diode- (LED-) based illumination system at two wavelengths (red & blue) with homogeneous and stable irradiation, and constant temperature conditions in 96-well plates was provided...
November 7, 2017: Photodiagnosis and Photodynamic Therapy
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