Abstract:
BACKGROUND:The development of nanocarriers is an important approach to increase the bioavailability of hydrophilic drugs in target cells. In this work, we evaluated the anti-tumorigenic mechanisms and efficacy of NanoALA, a novel nanoformulation of aminolevulic acid (ALA) based on poly(lactide-co-glycolide) (PLGA) nanocapsules designed for anticancer photodynamic therapy (PDT). METHODS:For this purpose, physicochemical characterization, prodrug incorporation kinetics, biocompatibility and photocytotoxicity tests, analysis of the cell death type and mitochondrial function, measurement of the intracellular reactive oxygen species production and DNA fragmentation were performed in murine mammary carcinoma (4T1) cells. RESULTS:NanoALA formulation, stable over a period of 90days following synthesis, presented hydrodynamic diameter of 220±8.7nm, zeta potential of -30.6mV and low value of polydispersity index (0.28). The biological assays indicated that the nanostructured product promotes greater ALA uptake by 4T1 cells and consequently more cytotoxicity in the PDT process. For the first time in the scientific literature, there is a therapeutic efficacy report of approximately 80%, after only 1h of incubation with 100μgmL-1 prodrug (0.6mM ALA equivalent). The mitochondria are probably the initial target of treatment, culminating in energy metabolism disorders and cell death by apoptosis. CONCLUSIONS:NanoALA emerges as a promising strategy for anticancer PDT. Besides being effective against a highly aggressive tumor cell line, the treatment may be economically advantageous because it allows a reduction in the dose and frequency of application compared to free ALA.
journal_name
Photodiagnosis Photodyn Therjournal_title
Photodiagnosis and photodynamic therapyauthors
de Andrade LR,Primo FL,da Silva JR,Tedesco AC,Lacava ZGMdoi
10.1016/j.pdpdt.2017.08.011subject
Has Abstractpub_date
2017-12-01 00:00:00pages
62-70eissn
1572-1000issn
1873-1597pii
S1572-1000(17)30314-9journal_volume
20pub_type
杂志文章abstract:BACKGROUND:Nanosecond pulsed electric field (nsPEF) treatment is a new anti-cancer strategy with ultrashort pulse duration and high intensity of electric fields. The application of nsPEFs affects all intra- and extracellular membranes and independently initiates the process of apoptosis within cancer cells, leading the...
journal_title:Photodiagnosis and photodynamic therapy
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doi:10.1016/j.pdpdt.2015.11.002
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abstract:BACKGROUND AND OBJECTIVES:This study aimed to compare the efficacy of fluorescein angiography (FA)-guided and indocyanine green angiography (ICGA)-guided half-time photodynamic therapy (PDT) for central serous chorioretinopathy (CSC). SUBJECTS AND METHODS:Medical records of 61 eyes of 61 CSC patients who underwent hal...
journal_title:Photodiagnosis and photodynamic therapy
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abstract:BACKGROUND:We demonstrate a new diagnostic method, Photodiagnostic Infrared Spectroscoppy (PDIS), which is able to detect circulating tumor clusters and circulating tumor cells in the circulatory system. METHODS:The PDIS method is based on photodiagnostic physics and high resolution spectroscopy and is using calibrate...
journal_title:Photodiagnosis and photodynamic therapy
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abstract:BACKGROUND:Photodynamic diagnosis (PDD) as well as thermovision belong to the category of non-invasive optical diagnosis techniques. Among many different skin cancer diseases, basal cell carcinoma (BCC) is the most frequently occurring one (almost 95% of all skin tumours). In contrast, seborrhoeic keratosis represents ...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2012.07.001
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abstract:BACKGROUND:Photodynamic therapy (PDT) is considered an important and innovative treatment for healing skin wounds. Skin ulcers with sinus tract formation are rare and difficult to treat in the field of dermatology. Herein, we utilized optical fibers as a light source to penetrate the sinus tract and applied PDT to trea...
journal_title:Photodiagnosis and photodynamic therapy
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doi:10.1016/j.pdpdt.2020.101802
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abstract::We have more than 10 years experience in the Photobiology Unit, in the use of topical photodynamic therapy (PDT) for non-melanoma skin cancer and other skin diseases. During this time we have undertaken approximately 5000 treatments and this article details the practical aspects of how we treat Bowen's disease with to...
journal_title:Photodiagnosis and photodynamic therapy
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abstract:BACKGROUND:Verrucous carcinoma of the penis is a rare disease characterized by verrucous lesions. The traditional treatment methods for verrucous carcinoma result in loss of sexual function are not satisfactory. The purpose of this study was to evaluate the safety and effect of topical aminolevulinic acid photodynamic ...
journal_title:Photodiagnosis and photodynamic therapy
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abstract:BACKGROUND:Optical coherence tomography (OCT) is a useful tool for the evaluation of structure and function of the kidney, but the image quality can be effected by many factors. OBJECTIVE:The objective of this study was to assess the image quality of different OCT systems in OCT imaging of the living kidney. METHODS:...
journal_title:Photodiagnosis and photodynamic therapy
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abstract:BACKGROUND:Autofluorescence bronchoscopy (AFB) is a highly sensitive tool for the detection of early bronchial cancers. However, its specificity remains limited due to primarily false positive results induced by hyperplasia, metaplasia and inflammation. We have investigated the potential of blue-violet backscattered li...
journal_title:Photodiagnosis and photodynamic therapy
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doi:10.1016/j.pdpdt.2008.01.005
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journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章,多中心研究
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abstract:BACKGROUND:Conventional cancer treatment methods suffer from many limitations such as non-specificity in discrimination between healthy and malignant cells. The aim of this study was to investigate the role of polymeric gold-photoactive nanoparticles (PGPNPs) conjugated with folic acid (FA) as theranostic nanoparticles...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2019.101602
更新日期:2020-03-01 00:00:00
abstract::The success of PDT and its establishment into the existent hall of therapeutic modalities depends on the collection of reported experiences from around the world. In that sense, it is important to report approaches taken by different countries and what their views are on the future of PDT. Following this idea, we pres...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/S1572-1000(05)00058-X
更新日期:2005-06-01 00:00:00
abstract::In the present study, the in vitro susceptibilities of five Candida spp. to photodynamic antimicrobial chemotherapy (PACT) with four phenothiazinium derivatives, methylene blue (MB), new methylene blue N (NMBN), toluidine blue O (TBO) and the novel pentacyclic phenothiazinium photosensitiser S137, in combination with ...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2012.11.004
更新日期:2013-05-01 00:00:00
abstract:BACKGROUND:To evaluate the effect of the first acute anterior uveitis (AAU) attack on the choroid by using an image binarization tool on images from enhanced depth imaging (EDI)-optical coherence tomography (OCT) scans in patients with ankylosing spondylitis (AS). METHODS:In this study, three groups were formed: uveit...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
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journal_title:Photodiagnosis and photodynamic therapy
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doi:10.1016/j.pdpdt.2020.101677
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abstract:BACKGROUND/AIM:Laser-based photodynamic endoscopic diagnosis (LPDED) is a type of endoscopic diagnosis that uses the fluorescence caused by the photochemical reaction that occurs when a fluorescent substance is irradiated by a light of a specific wavelength. Although 5-aminolevulinic acid (5-ALA) can detect early gastr...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2018.02.005
更新日期:2018-06-01 00:00:00
abstract:BACKGROUND:Increasing resistance of oral pathogens to conventional antibacterial agents has resulted to find alternative therapies to overcome resistance development problems; hence this in vitro study was carried out to investigate the efficacy of photoelimination of Streptococcus mutans with two methods of photodynam...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2013.07.002
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abstract:BACKGROUND:Light fractionation with a 2-h dark interval increases the efficacy of topical aminolevulinic acid (ALA) photodynamic therapy (PDT). Hexyl-aminolevulinate (HAL) is the hexyl ester of ALA. Both HAL and ALA lead to protoporphyrin IX (PpIX) accumulation in endothelial cells and to vascular effects, which are im...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2013.09.002
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abstract:INTRODUCTION:Photodynamic therapy is an innovative treatment modality, which is appropriate for tumor detection and for the treatment of cancer as well as nontumoral diseases, such as psoriasis (2), bacterial and viral eradication. MATERIAL AND METHOD:Effect of two photosensitizer (toluidine blue O (TBO) and Radachlor...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2016.07.001
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journal_title:Photodiagnosis and photodynamic therapy
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journal_title:Photodiagnosis and photodynamic therapy
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journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2014.06.002
更新日期:2014-09-01 00:00:00
abstract::Medication-related osteonecrosis of the jaw (MRONJ) results in progressive destruction of the jawbones, and advanced cases demand surgical intervention. The total removal of necrotic bone is required to prevent recurrence and infection. However, determining the limits between necrotic and healthy bone is a challenge. ...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章,评审
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更新日期:2020-12-01 00:00:00
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journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2020.102051
更新日期:2020-12-01 00:00:00
abstract:AIM:To investigate the effects of ALA-PDT on biofilm structure, virulence factor secretion, and quorum sensing (QS) in Pseudomonas aeruginosa. MATERIALS AND METHODS:We used confocal laser scanning microscopy (CLSM), an XTT assay, scanning electron microscopy (SEM), a virulence factor assay and qRT-PCR in this study. ...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2018.07.005
更新日期:2018-12-01 00:00:00
abstract:BACKGROUND AND OBJECTIVE:Pancreatic cancer is a leading cause of cancer-related deaths in men and women. Early clinical studies suggest that photodynamic therapy (PDT) might be a useful modality in the management of this deadly disease. In this study, the photocytotoxicity of Photofrin-mediated PDT on different human p...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2012.11.001
更新日期:2013-09-01 00:00:00
abstract:BACKGROUND:Recently, 5-aminolevulinic acid-based photodynamic therapy (ALA-PDT) is being widely used in cancer therapy owing to the tumor-specific accumulation of photosensitizing protoporphyrin IX (PpIX) after the administration of ALA. In the present study, by focusing on genes involved in the porphyrin biosynthesis ...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2011.12.004
更新日期:2012-09-01 00:00:00
abstract:BACKGROUND:The focal goal of this study is to identify optimal accumulation periods for ALA-induced PpIX in different healthy anatomical sites of human oral cavity and different types of abnormal mucosa to improve the accuracy of the clinical applications such as photodiagnosis and tissue grading. MATERIALS AND METHOD...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2010.06.006
更新日期:2010-09-01 00:00:00
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journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2015.10.003
更新日期:2015-12-01 00:00:00
abstract:BACKGROUND:Bowenoid papulosis is a polymorphic papular disease that occurs on the external genital area. We investigated the efficacy of 5-aminolevulinic acid-mediated photodynamic therapyin the treatment of Bowenoid papulosis. METHODS:We investigated 200 Bowenoid papulosis cases from the Department of Dermatology and...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2019.101635
更新日期:2020-03-01 00:00:00