Abstract:
:Decreasing incubation time, as well as enhanced PpIX production, are present challenges for topical photodynamic therapy (PDT). There are reports concerning the existence of a strong relationship between site temperature and porphyrin synthesis in biological tissue, that suggest temperature increase in the tissue can improve the formation of PpIX. The main objective of this study is to determine whether the temperature change of the tissue favors the production of PpIX. Creams containing aminolevulinic acid (ALA) and methyl aminolevulinate (MAL) were topically administered for 30 min on healthy skin of rats' back and the formation of PpIX was evaluated for 180 min. The animals were divided into 5 groups: cooling tissue to 20 °C or heating tissue to 40 °C (either before or after incubation of the cream) and control group (unchanged temperature). The tissue temperature was evaluated by thermography. The influence of temperature was evaluated both concerning cream penetration and the production of PpIX. It was found that both ALA and MAL led to an increase of about 20% PpIX production when the tissue was warmed before incubation of the cream, suggesting that the penetration improved. When the thermal change was promoted after incubation of the cream, the production of PpIX decreased both by heating and cooling, probably related to enzyme modification. The results found in this study suggest that the increase of tissue temperature before the cream incubation can improve the clinical protocols of topical PDT using ALA or MAL, improving the efficiency of the procedure by increasing the production of PpIX and allowing the decrease of the incubation period.
journal_name
Photodiagnosis Photodyn Therjournal_title
Photodiagnosis and photodynamic therapyauthors
Stringasci MD,Moriyama LT,Vollet-Filho JD,Bagnato VSdoi
10.1016/j.pdpdt.2020.101786subject
Has Abstractpub_date
2020-06-01 00:00:00pages
101786eissn
1572-1000issn
1873-1597pii
S1572-1000(20)30139-3journal_volume
30pub_type
杂志文章abstract:PURPOSE:Early diagnosis of tooth enamel demineralization, and dentin caries lesions, present a valuable solution to avoid or decrease their deleterious effect. The aim of this study was to design a simple, effective, and non-invasive technique, employing a novel laser wavelength to classify and differentiate between va...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2018.11.017
更新日期:2019-03-01 00:00:00
abstract:BACKGROUND:Erosive oral lichen planus (EOLP) poses a substantial risk of malignant transformation into squamous cell cancer. The absence of established treatment gives way to alternative therapeutic strategies, including photodynamic therapy. The aim of the study was to evaluate the efficacy of PDT in the treatment of ...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2017.01.178
更新日期:2017-06-01 00:00:00
abstract::Today, the widespread use of laser instruments in various fields has resulted in many accidental retinal injuries. Here we describe a rare clinical case of full-thickness macular hole (MH) and focal choroidal excavation (FCE) caused by a 1064-nm Q-switched Nd:YAG laser. After pars plana vitrectomy and the following 14...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2017.07.001
更新日期:2017-09-01 00:00:00
abstract::The relationship between cytomegalovirus (CMV), a severe complication in immunocompromised patients, and graft-versus-host disease (GVHD) has already been reported but remains without complete elucidation, especially concerning oral lesions. Considering that antimicrobial photodynamic therapy (aPDT) has an antimicrobi...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2020.101849
更新日期:2020-12-01 00:00:00
abstract::We report a case of idiopathic paracentral acute middle maculopathy with typical optical imaging and clinical features. A 26-year-old Chinese policeman presented with a 20-day history of paracentral scotoma in the left eye after early wake-up and long-time working in front of computer the day before. He experienced su...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2017.07.004
更新日期:2017-09-01 00:00:00
abstract:BACKGROUND:Optical fibres can be placed in balloons to deliver light for intracranial photodynamic therapies. METHOD:A series of fibres, with either cleaved ends or terminating in cylindrical diffusers, housed in two different balloons, containing various solutions were investigated. The aim of the experiments perform...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2007.06.003
更新日期:2007-09-01 00:00:00
abstract:BACKGROUND:Although aminolevulinic acid (ALA)-induced protoporphyrin IX (PpIX) photodynamic therapy (PDT) is an effective FDA-approved therapy for actinic keratosis (AK), a substantial fraction of patients (up to 25%) do not respond to treatment. This study examined the feasibility of using pre-treatment measurements o...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 临床试验,杂志文章
doi:10.1016/j.pdpdt.2015.10.006
更新日期:2015-12-01 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
doi:10.1016/j.pdpdt.2020.101778
更新日期:2020-09-01 00:00:00
abstract:INTRODUCTION/AIM:Photodynamic therapy (PDT) involves the use of a tumor-specific photosensitizer and laser irradiation, and is one of the treatment options recommended for early centrally located lung cancers, but not yet for peripheral-type lung cancers. We developed a new laser probe, the composite-type optical fiber...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2020.101698
更新日期:2020-06-01 00:00:00
abstract:BACKGROUND:Photodynamic therapy has apart from a direct cytotoxic effect also immunomodulatory properties. The aim of our study was to investigate how photodynamic therapy with 5-aminolevulinic acid (ALA-PDT) in sublethal doses influences the secretion of interleukins 6, 8 and 10 from colon cancer cells in vitro. METH...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2018.02.021
更新日期:2018-06-01 00:00:00
abstract::Vibrio parahaemolyticus (V. parahaemolyticus) is currently a major cause of bacterial diarrhoea associated with seafood consumption. The objective of this study was to determine the inactivation effect of curcumin-mediated photodynamic action on V. parahaemolyticus. First of all, V. parahaemolyticus suspended in PBS b...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2016.05.004
更新日期:2016-09-01 00:00:00
abstract:BACKGROUND:Bacterial resistance is a problem during the process of healing of infected wounds. As a therapy, photodynamic therapy (PDT) has broad-spectral antibacterial activity and non-selective action, which makes it possible to deal with antibiotic resistance.. Methylene blue is a commonly used medicine, but it is r...
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: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
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2020.101983
更新日期:2020-12-01 00:00:00
abstract:BACKGROUND:This paper provides the results of the non-clinical evaluation of biodistribution of the PS Photolon in inner organs and tissues of intact and tumor-bearing rats with xenograft tumors of different morphologic types. METHODS:The accumulation studies were performed in rats by means of intravital laser fluorim...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2009.04.002
更新日期:2009-06-01 00:00:00
abstract:BACKGROUND:Multidrug resistance (MDR) of breast cancer is a major obstacle in chemotherapy of cancer treatments. Recently the anti-tumor effects of Chlorin e6 (Ce6) mediated photodynamic therapy (Ce6-PDT) were reported in skin cancer and hepatoma in vitro. However, its therapeutic potential in killing human breast canc...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2016.07.004
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:Peritoneal carcinomatosis results when tumour cells implant and grow within the peritoneal cavity. Treatment and prognosis vary based on the primary cancer. Although therapy with intention-to-cure is offered to selective patients using cytoreductive surgery with chemotherapy, the prognosis remains poor for m...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章,评审
doi:10.1016/j.pdpdt.2017.10.021
更新日期:2017-12-01 00:00:00
abstract::Photodynamic therapy (PDT) was started in the People's Republic of China in the early 1980s after domestically produced hematoporphyrin derivative (HpD) became available. Since then, numerous photosensitizers have been synthesized and evaluated. Several promising ones have undergone clinical investigations and a few h...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/S1572-1000(06)00009-3
更新日期:2006-03-01 00:00:00
abstract:OBJECTIVES:The aim of this study was to develop a novel photosensitizer from traditional plant extracts and to investigate the photodynamic therapy (PDT) effect and mechanism of action of the novel photosensitizer on KB and Hep-2 cells. METHODS:Fluorescence emission, cell viability, and intracellular distribution of c...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2019.02.020
更新日期:2019-06-01 00:00:00
abstract:BACKGROUND:Reduction of myocardial ischemia-reperfusion injury in the patients undergoing cardiac surgery under cardiopulmonary bypass represents an important goal. Intraoperative monitoring of myocardial metabolic state using continuous registration of nicotinamide adenine dinucleotide (NADH) and flavin adenine dinucl...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2014.05.003
更新日期:2014-09-01 00:00:00
abstract:OBJECTIVE:To analyze the clinical efficacy of hematoporphyrin monomethyl ether photodynamic therapy (HMME-PDT) in treating port-wine stains (PWS), and its clinical operation skills and operation essentials. METHOD:A total of 16 cases of PWS with negative HMME skin test results were included in this study. Their treate...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章,评审
doi:10.1016/j.pdpdt.2017.09.013
更新日期:2017-12-01 00:00:00
abstract:BACKGROUND:Early diagnosis of non-melanoma skin cancer (NMSC) is potentially possible using optical coherence tomography (OCT) which provides non-invasive, real-time images of skin with micrometre resolution and an imaging depth of up to 2mm. OCT technology for skin imaging has undergone significant developments, impro...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2016.08.004
更新日期:2016-12-01 00:00:00
abstract::Photodynamic therapy (PDT) is a promising modality for the treatment of cancer. PDT involves administering a photosensitizing dye, i.e. photosensitizer, that selectively accumulates in tumors, and shining a light source on the lesion with a wavelength matching the absorption spectrum of the photosensitizer, that exert...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章,评审
doi:10.1016/j.pdpdt.2019.04.033
更新日期:2019-06-01 00:00:00
abstract:AIM:The aim of this study was to evaluate the effectiveness of final decontamination protocols against Enterococcus faecalis and their influence on bond strength of filling material to root canal dentin. MATERIAL AND METHODS:Ninety root canals were enlarged with ProTaper system and inoculated with E. faecalis for 15da...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2016.11.004
更新日期:2017-03-01 00:00:00
abstract:BACKGROUND:Photodynamic therapy (PDT) is a good option for the treatment of Bowen's disease (BD). However, BD occasionally can progress into a squamous cell carcinoma (SCC) after PDT. OBJECTIVE:Find predictors of aggressiveness of BD after PDT METHODS: Two biopsies of patients with BD treated with PDT with progression...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2018.02.004
更新日期:2018-06-01 00:00:00
abstract:BACKGROUND:Photodynamic therapy (PDT) and diagnosis (PDD) using 5-aminolevulinic acid (ALA) to control the production of the intracellular photosensitizer protoporphyrin IX (PpIX) are commonly used clinically. Previously, we demonstrated that dormant and drug-induced dormancy-like cancer cells accumulated high PpIX lev...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2020.101893
更新日期:2020-09-01 00:00:00
abstract:BACKGROUND:Antibacterial photodynamic therapy (aPDT) has been proposed as an alternative strategy to inactivate bacteria. This study was designed to investigate the antibacterial effect of a novel photosensitizer S-Porphin sodium (S-PS) on plankton and biofilm cultures of Staphylococcus aureus (S. aureus) and its multi...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2019.08.031
更新日期:2019-12-01 00:00:00
abstract:BACKGROUND:Tumor markers are commonly used for cancer screening and as indicators of therapeutic effects. Certain types of tumor have been known to produce a variety of porphyrins after 5-aminolevulinic acid (ALA) administration. In this study, porphyrins in tumor-bearing mouse urine were analyzed after oral administra...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2011.04.004
更新日期:2011-12-01 00:00:00
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
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2008.01.005
更新日期:2008-03-01 00:00:00
abstract:BACKGROUND:Photodynamic therapy (PDT) is a well-known and effective treatment for non-melanoma skin-cancer. Numerous studies have also shown its effectiveness in mycosis fungoides. The aim of the study was to analyse MF patients treated with PDT at the Dermatology Unit of Bologna University. METHODS:We retrospectively...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2017.09.004
更新日期:2017-12-01 00:00:00
abstract:BACKGROUND:The aim of this study was to evaluate the effect of multiple sessions of antimicrobial photodynamic therapy (aPDT) on the treatment of experimental periodontitis (EP) in rats treated with chemotherapy. METHODS:Chemotherapy using 5-fluorouracil (5-FU) consisted of intraperitoneal administration of 60 and 40 ...
journal_title:Photodiagnosis and photodynamic therapy
pub_type: 杂志文章
doi:10.1016/j.pdpdt.2018.11.014
更新日期:2019-03-01 00:00:00