Read by QxMD icon Read

photodynamic bladder cancer

Albert W Girotti, Jonathan M Fahey, Witold Korytowski
Photodynamic therapy (PDT) is a unique site-specific treatment for eradicating a variety of solid tumors, including prostate, lung, bladder, and brain tumors. PDT is a three-component modality involving (i) administration of a photosensitizing agent (PS), (ii) PS photoexcitation by visible or near-infrared light, and (iii) molecular oxygen. Upon photoexcitation, PS gives rise to tumor-damaging reactive oxygen species, most prominently singlet oxygen (1O2). Previous studies revealed that endogenous nitric oxide (NO) in various mouse tumor models significantly reduced PDT effectiveness...
2016: Current Medicinal Chemistry
Patrícia Manuela Ribeiro Pereira, Sandrina Silva, Mafalda Bispo, Mónica da Rocha Zuzarte, Célia Gomes, Henrique Girão, José A S Cavaleiro, Carlos A Fontes Ribeiro, Joao P C Tome, Rosa Fernandes
Here we report the rational design of a new third-generation photosensitizer (PS), a chlorin conjugated with galactodendritic units, ChlGal8, to improve the effectiveness of bladder cancer treatment. ChlGal8 shows better photo-chemical and -physical properties than a recently reported homologous porphyrin, PorGal8. In addition to inheriting excellent photostability, ability to generate singlet oxygen and to interact with the proteins galectin-1 and human serum albumin (HSA), ChlGal8 exhibits high absorption in the red region of the electromagnetic spectrum...
October 17, 2016: Bioconjugate Chemistry
Patrícia M R Pereira, Sandrina Silva, José S Ramalho, Célia M Gomes, Henrique Girão, José A S Cavaleiro, Carlos A F Ribeiro, João P C Tomé, Rosa Fernandes
Conventional photodynamic agents used in clinic are porphyrin-based photosensitizers. However, they have low tumour selectivity, which may induce unwanted side-effects and damage to healthy tissues. In this study, we used a porphyrin with dendritic units of galactose (PorGal8) developed by us, which can target the galactose-binding protein, galectin-1, known to be overexpressed in many tumour tissues. In vitro and in vivo studies had been conducted for the validation of PorGal8 effectiveness. We showed a specific uptake of PorGal8 and induction of apoptotic cell death by generating oxidative stress and alterations in the cytoskeleton of bladder cancer cells overexpressing galectin-1...
October 5, 2016: European Journal of Cancer
E V Filonenko, A D Kaprin, B Y A Alekseev, O I Apolikhin, E K Slovokhodov, V I Ivanova-Radkevich, A N Urlova
The results of multicenter prospective trial for efficacy of combined modality treatment: transurethral resection (TUR) + photodynamic therapy (PDT) with alasens for bladder cancer are represented in the article. Trials were organized by Research Institute of Organic Intermediates and Dyes and conducted according to clinical protocol approved by Ministry of Health of Russia, at the sites of leading Russian cancer clinical centers. The trial included 45 subjects with verified diagnosis of non-muscle-invasive bladder cancer...
September 23, 2016: Photodiagnosis and Photodynamic Therapy
Li-Jun Zhang, Xiang-Hua Zhang, Ping-Yong Liao, Jing-Jian Sun, Li Wang, Yi-Jia Yan, Zhi-Long Chen
Photodynamic therapy is a minimally invasive and promising new method in cancer treatment and has attracted considerable attention in recent years. An ideal photosensitizer is a crucial element to photodynamic therapy. In the present paper, a novel porphyrin derivative, 5, 10, 15, 20-tetrakis (5-(pyrrolidin-1-yl) pentyl) porphin (TPPP) was synthesized. Its spectroscopic and physicochemical properties, therapeutic efficacy as a photosensitizer in photodynamic therapy for human bladder cancer in vitro and in vivo were investigated...
October 2016: Journal of Photochemistry and Photobiology. B, Biology
Thorsten Bach, Patrick J Bastian, Andreas Blana, Angelika Kaminsky, Stefan Keller, Thomas Knoll, Christoph Lang, Soeren Promnitz, Burkhard Ubrig, Thomas Keller, Bryan Qvick, Maximilian Burger
PURPOSE: White light cystoscopy (WLC) is the standard procedure for visualising non-muscle invasive bladder cancer (NMIBC). However, WLC can fail to detect all cancerous lesions, and outcomes with transurethral resection of the bladder differ between institutions, controlled trials, and possibly between trials and routine application. This noninterventional study assessed the benefit of hexaminolevulinate blue light cystoscopy (HALC; Hexvix(®), Ipsen Pharma GmbH, Germany) plus WLC versus WLC alone in routine use...
August 30, 2016: World Journal of Urology
A Karl, T Grimm, F Jokisch, N T Gaisa, C G Stief
INTRODUCTION: Urothelial carcinoma of the bladder is known as one of most common malignant tumors in the urogenital tract. Non-muscle invasive bladder cancer (NMIBC) in particular has a high recurrence rate and results in correspondingly high costs for the public health system. METHODS: To improve the recurrence rate and the prognosis of NMIBC the diagnosis, resection technique, adjuvant instillation therapy and exact histopathological classification of tumor lesions are indispensable...
September 2016: Der Urologe. Ausg. A
Tzu-Yin Lin, Yuanpei Li, Qiangqiang Liu, Jui-Lin Chen, Hongyong Zhang, Diana Lac, Hua Zhang, Katherine W Ferrara, Sebastian Wachsmann-Hogiu, Tianhong Li, Susan Airhart, Ralph deVere White, Kit S Lam, Chong-Xian Pan
The overall prognosis of bladder cancer has not been improved over the last 30 years and therefore, there is a great medical need to develop novel diagnosis and therapy approaches for bladder cancer. We developed a multifunctional nanoporphyrin platform that was coated with a bladder cancer-specific ligand named PLZ4. PLZ4-nanoporphyrin (PNP) integrates photodynamic diagnosis, image-guided photodynamic therapy, photothermal therapy and targeted chemotherapy in a single procedure. PNPs are spherical, relatively small (around 23 nm), and have the ability to preferably emit fluorescence/heat/reactive oxygen species upon illumination with near infrared light...
October 2016: Biomaterials
Abraham B Alemayehu, Nicholas U Day, Tomoyasu Mani, Alexander B Rudine, Kolle E Thomas, Odrun A Gederaas, Sergei A Vinogradov, Carl C Wamser, Abhik Ghosh
Two amphiphilic corroles-5,10,15-tris(3-carboxyphenyl)corrole (H3[mTCPC]) and 5,10,15-tris(4-carboxyphenyl)corrole (H3[pTCPC])-and their gold complexes have been synthesized, and their photophysical properties and photovoltaic behavior have been investigated. Like other nonpolar gold corroles, Au[mTCPC] and Au[pTCPC] were both found to exhibit room temperature phosphorescence in deoxygenated solutions with quantum yields of ∼0.3% and triplet lifetimes of ∼75 μs. Both compounds exhibited significant activity as dyes in photodynamic therapy experiments and in dye-sensitized solar cells...
July 27, 2016: ACS Applied Materials & Interfaces
Matthias May, Hans-Martin Fritsche, Malte W Vetterlein, Patrick J Bastian, Michael Gierth, Philipp Nuhn, Atiqullah Aziz, Margit Fisch, Christian G Stief, Markus Hohenfellner, Manfred P Wirth, Vladimir Novotny, Oliver W Hakenberg, Joachim Noldus, Christian Gilfrich, Christian Bolenz, Maximilian Burger, Sabine D Brookman-May
PURPOSE: Results of a retrospective single-institution study recently suggested improved prognostic outcomes in patients undergoing photodynamic diagnosis (PDD)-assisted transurethral resection of bladder tumor (TURBT) prior to radical cystectomy (RC). We sought to validate the prognostic influence of PDD-assisted TURBT on survival after RC by relying on a multi-institutional dataset. METHODS: To provide a homogeneous study population, patients with organ metastasis at the time of RC and/or after neoadjuvant chemotherapy were excluded from analysis, which resulted in overall 549 bladder cancer (BC) patients from 18 centers of the Prospective Multicenter Radical Cystectomy Series 2011 (PROMETRICS 2011)...
June 14, 2016: World Journal of Urology
Kathrin M Scherer, Roger H Bisby, Stanley W Botchway, Anthony W Parker
Photodynamic therapy (PDT) is an alternative cancer treatment to conventional surgery, radiotherapy and chemotherapy. It is based on activating a drug with light that triggers the generation of cytotoxic species that promote tumour cell killing. At present, PDT is mainly used in the treatment of wet age-related macular degeneration, for precancerous conditions of the skin (e.g. actinic keratosis) and in the palliative care of advanced cancers, for instance of the bladder or the oesophagus. PDT is still not used as a first line cancer treatment, which is surprising given the first clinical trials by Dougherty's group dating back to the 1970's...
May 13, 2016: Anti-cancer Agents in Medicinal Chemistry
K Sfetsas, D Mitropoulos
BACKGROUND: The authors evaluated the role of photodynamic cystoscopy in the detection of additional urothelial lesions, mainly carcinoma in situ, that would not be detected solely with white light cystoscopy, leading to disease understaging. METHODS: From 2009 to 2011, 70 patients underwent white light cystoscopy, followed by photodynamic cystoscopy (blue light system, Karl Storz, Tuttlingen, Germany). Preoperatively they were instilled intravesically with 50ml of Hexvix (Hexaminolevulinate hexylester)...
June 2016: Journal of the Egyptian National Cancer Institute
Kristen R Scarpato, Mark D Tyson, Peter E Clark
PURPOSE OF REVIEW: This article reviews the natural biology of noninvasive bladder cancer and its management strategies while summarizing the most recent advances in the field. RECENT FINDINGS: Nonmuscle invasive bladder cancer (NMIBC) has a tendency to recur and progress. Risk stratification has helped triage patients but improved tools, including biomarkers, are still needed. Enhanced endoscopy with photodynamic imaging, narrow band imaging, optical coherence tomography and confocal laser endomicroscopy show promise for diagnosis, risk stratification and disease monitoring...
May 2016: Current Opinion in Oncology
Rachel E Doherty, Igor V Sazanovich, Luke K McKenzie, Alexander S Stasheuski, Rachel Coyle, Elizabeth Baggaley, Sarah Bottomley, Julia A Weinstein, Helen E Bryant
Photodynamic therapy that uses photosensitizers which only become toxic upon light-irradiation provides a strong alternative to conventional cancer treatment due to its ability to selectively target tumour material without affecting healthy tissue. Transition metal complexes are highly promising PDT agents due to intense visible light absorption, yet the majority are toxic even without light. This study introduces a small, photostable, charge-neutral platinum-based compound, Pt(II) 2,6-dipyrido-4-methyl-benzenechloride, complex 1, as a photosensitizer, which works under visible light...
2016: Scientific Reports
Vanya Bogoeva, Monica Siksjø, Kristin G Sæterbø, Thor Bernt Melø, Astrid Bjørkøy, Mikael Lindgren, Odrun A Gederaas
Photodynamic therapy (PDT) is a noninvasive treatment for solid malignant and flat tumors. Light activated sensitizers catalyze photochemical reactions that produce reactive oxygen species which can cause cancer cell death. In this work we investigated the photophysical properties of the photosensitizer ruthenium(II) porphyrin (RuP), along with its PDT efficiency onto rat bladder cancer cells (AY27). Optical spectroscopy verified that RuP is capable to activate singlet oxygen via blue and red absorption bands and inter system crossing (ISC) to the triplet state...
June 2016: Photodiagnosis and Photodynamic Therapy
Noriaki Koizumi, Yoshinori Harada, Takeo Minamikawa, Hideo Tanaka, Eigo Otsuji, Tetsuro Takamatsu
Photodynamic diagnosis based on 5-aminolevulinic acid-induced protoporphyrin IX has been clinically applied in many fields based upon its evidenced efficacy and adequate safety. In order to establish a personalized medicine approach for treating gastric cancer patients, rapid intraoperative detection of malignant lesions has become important. Feasibility of photodynamic diagnosis using 5-aminolevulinic acid for gastric cancer patients has been investigated, especially for the detection of peritoneal dissemination and lymph node metastasis...
January 21, 2016: World Journal of Gastroenterology: WJG
Savino M Di Stasi, Francesco De Carlo, Vincenzo Pagliarulo, Francesco Masedu, Cristian Verri, Francesco Celestino, Claus Riedl
Clinical trials have shown that hexaminolevulinate (HAL) fluorescence cystoscopy improves the detection of bladder tumors compared with standard white-light cystoscopy, resulting in more efficacious treatment. However, some recent meta-analyses report controversially on recurrence-free rates with this procedure. A systematic review of literature was performed from December 2014 to January 2015 using the PubMed, Embase and Cochrane databases for controlled trials on photodynamic diagnosis (PDD) with HAL. A total of 154 publications were found up to January 2015...
December 2015: Therapeutic Advances in Urology
Nathan A Brooks, Michael A O'Donnell
Bladder cancer is the ninth-most prevalent cancer worldwide. Most patients with urothelial cell carcinoma of the bladder present with non-muscle-invasive disease and are treated with bacillus Calmette-Guérin (BCG) intravesical therapy. Many of these patients experience disease recurrence after BCG failure. Radical cystectomy is the recommended treatment for high-risk patients failing BCG. However, many patients are unfit for or unwilling to undergo this procedure. We searched the published literature on the treatment of non-muscle-invasive bladder cancer (NMIBC) after BCG failure...
October 2015: Indian Journal of Urology: IJU: Journal of the Urological Society of India
Jan-Friedrich Jokisch, Alexander Karl, Christian Stief
INTRODUCTION: Nonmuscle invasive urothelial cell carcinoma is the most frequent malignancy of the urinary bladder. The high recurrence rate (up to 80%) and risk of progression (up to 30%) reflect the need for long-term follow-up and sometimes multiple interventions. To reduce the rate of recurrences and tumor progression, intravesical immunotherapy, especially the use of Bacille Calmette-Guerin (BCG), represents the gold standard adjuvant treatment of high-risk nonmuscle invasive bladder cancer (NMIBC)...
October 2015: Indian Journal of Urology: IJU: Journal of the Urological Society of India
N Venkatramaiah, Patrícia M R Pereira, Filipe A Almeida Paz, Carlos A F Ribeiro, Rosa Fernandes, João P C Tomé
Phthalocyanines (Pcs) bearing phosphonic acid groups at the periphery exhibit a potential photodynamic effect to induce phototoxicity on human bladder cancer epithelial cells (UM-UC-3). In vitro photophysical and biological studies show high intrinsic ability to inhibit the activity of urokinase plasminogen activator (uPA) and matrix metalloproteinase-9 (MMP-9).
November 4, 2015: Chemical Communications: Chem Comm
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"