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Photodynamic diagnosis

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https://www.readbyqxmd.com/read/29155074/photodynamic-diagnosis-of-parathyroid-glands-with-nano-stealth-aminolevulinic-acid-liposomes
#1
Shaimaa Elbassiouny, Maha Fadel, Tarek Elwakeel, Mahmoud Saber
AIM OF THE STUDY: Exploring whether the formulation of ALA in nano-stealth liposomes would inflict its photodiagnostic effectiveness. The present study represents ALA in nano-stealth liposomes as well as in conventional nanoliposomes in order to be used for photodiagnosis of parathyroid glands intraoperatively. MATERIALS AND METHODS: Preparation of ALA nanovesicles and characterization for the drug encapsulation%, vesicle size, Zeta potential, in vitro drug release profile and stability...
November 15, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29135009/bacterial-species-identifiable-magnetic-nanosystems-for-early-sepsis-diagnosis-and-extracorporeal-photodynamic-blood-disinfection
#2
Jianhao Wang, Hao Wu, Yanmei Yang, Rong Yan, Yuan Zhao, Yanhao Wang, Aihong Chen, Shilong Shao, Pengju Jiang, Yong-Qiang Li
Despite the numerous bacteria detection and elimination techniques available nowadays, sensitive diagnosis and treatment of sepsis (caused by the presence of bacteria in the bloodstream), especially at the early stage, remain big challenges. Here we report a nanosystem for early sepsis diagnosis and complete extracorporeal blood disinfection, based on iron oxide magnetic nanoparticles functionalized with chlorin e6 molecules and bacterial species-identifiable aptamers (Fe3O4-Ce6-Apt). We demonstrate that the Fe3O4-Ce6-Apt nanosystem can achieve simultaneous blood bacterial species identification and enrichment in a single step, and the enriched bacteria can be easily detected with the assistance of fluorescence microscopic determination...
November 14, 2017: Nanoscale
https://www.readbyqxmd.com/read/29121779/image-guided-surgery-in-gynecologic-oncology
#3
Henri Azaïs, Geoffroy Canlorbe, Yohan Kerbage, Anne Grabarz, Pierre Collinet, Serge Mordon
Image-guided surgery is a relevant way to reduce surgical morbidity and maximize cytoreductive surgery approach especially in ovarian cancer. Sentinel lymph node detection is a promising approach to avoid radical lymph node dissection and is slightly becoming standard in daily practice in endometrial and cervical cancer surgery even if it needs to be evaluated more precisely. Regarding carcinomatosis of ovarian origin, detection and treatment of microscopic disease could be appropriate to avoid local recurrences...
November 10, 2017: Future Oncology
https://www.readbyqxmd.com/read/29110046/-supplementary-optical-techniques-for-the-detection-of-nonmuscle-invasive-bladder-cancer
#4
REVIEW
S Aeishen, Y Dawood, S Papadoukakis, M Horstmann
White light cystoscopy (WL) is the gold standard for the detection of bladder cancer. It can be performed using a rigid or flexible urethrocystoscope. With the more recent introduction of high definition (HD) techniques, WL cystoscopy has been decisively improved. Supplementary optical techniques are also used to improve the detection of bladder cancer. Among these are photodynamic diagnosis (PDD), narrow-band imaging (NBI), S‑technologies of IMAGE1 S, optical coherence tomography (OCT), confocal laser endomicroscopy (CLE), and Raman spectroscopy...
November 6, 2017: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/29077180/large-choroidal-excavation-in-a-patient-with-rubella-retinopathy
#5
Maurizio Battaglia Parodi, Francesco Romano, Marco Montagna, Francesco Bandello
PURPOSE: To describe a case of rubella retinopathy complicated by bilateral choroidal neovascularization (CNV) and late development of large choroidal excavation (LCE). METHODS: A 19-year-old woman with a diagnosis of rubella retinopathy underwent her annual ophthalmologic examination, including visual acuity testing and slit-lamp biomicroscopy with dilated fundus examination. Color fundus photography, spectral-domain optical coherence tomography (SD-OCT) scans, and optical coherence tomography angiography were acquired to complete the investigation of her ocular condition...
October 17, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29071138/photodynamic-diagnosis-in-upper-urinary-tract-urothelial-carcinoma-a-systematic-review
#6
REVIEW
Elsawi Osman, Ziad Alnaib, Nitya Kumar
OBJECTIVE: To assess the diagnostic accuracy and safety of photodynamic diagnosis (PDD) in upper urinary tract urothelial carcinoma (UUTUC). MATERIALS AND METHODS: A systematic literature search was conducted. Included studies were assessed for the risks of bias and quality using appropriate tools. Dedicated data extraction forms were used. Diagnostic accuracy in terms of sensitivity and specificity were quoted whenever provided by individual studies. A combined toxicity profile of 5-aminolevulinic acid (5ALA) was given after reviewing individual studies...
June 2017: Arab Journal of Urology
https://www.readbyqxmd.com/read/29058274/carbon-nanotubes-based-drug-delivery-to-cancer-and-brain
#7
Qing Guo, Xian-Tao Shen, Yuan-Yuan Li, Shun-Qing Xu
Current treatments for cancer and the central nervous system diseases are limited, partly due to the difficulties posed by the insolubility, poor distribution of drugs among cells and lack of selectivity of drugs, the inability of drugs to cross cellular barriers and blood brain barrier (BBB). Carbon nanotubes (CNTs) possess many distinct properties including good electronic properties, remarkably penetrating capability on the cell membrane, high drug-loading and pH-dependent therapeutic unloading capacities, thermal properties, large surface area and easy modification with molecules, which render them as a suitable candidate to deliver drugs to cancer and brain...
October 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/29056554/development-of-a-novel-schiff-base-derivative-for-enhancing-the-anticancer-potential-of-5-aminolevulinic-acid-based-photodynamic-therapy
#8
Yusei Shinohara, Yoshio Endo, Chiaki Abe, Ikkyu Shiba, Masahiro Ishizuka, Tohru Tanaka, Yutaka Yonemura, Shun-Ichiro Ogura, Masahide Tominaga, Hisatsugu Yamada, Yoshihiro Uto
5-Aminolevulinic acid (ALA), a precursor of protoporphyrin IX (PpIX), is now widely used for photodynamic diagnosis (ALA-PDD) and photodynamic therapy (ALA-PDT) of various cancers. Recently, we found that treatment of cancer cells with the Schiff base derivative TX-816 along with ALA could significantly increase the efficacy of ALA-PDT. This enhancing effect of TX-816 on ALA-PDT is attributed to 3,5-dichlorosalicylaldehyde (DCSA), a molecule produced by the degradation of TX-816. Similar to TX-816, DCSA significantly enhances the effect of ALA-PDT...
October 19, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29045251/novel-endoscopic-visualization-techniques-for-bladder-cancer-detection-a-review-of-the-contemporary-literature
#9
Andrea Mari, Mohammad Abufaraj, Killian M Gust, Shahrokh F Shariat
PURPOSE OF REVIEW: To describe the principles of photodynamic diagnosis (PDD), narrow-band imaging (NBI) and Storz Professional Image Enhancement System (SPIES) techniques for the endoscopic management of nonmuscle-invasive bladder cancer (BCa) and to report their impact on clinical practice. RECENT FINDINGS: PDD is associated with an increased sensitivity for detecting BCa specifically carcinoma in situ (CIS). Moreover, PDD has been shown to lower recurrence rate in comparison with white-light cystoscopy...
October 17, 2017: Current Opinion in Urology
https://www.readbyqxmd.com/read/29044086/optical-coherence-tomography-angiography-of-circumscribed-choroidal-hemangioma-treated-with-photodynamic-therapy
#10
Giuseppe Lo Giudice, Alessandro Galan
We describe features of a circumscribed choroidal hemangioma (CCH) treated with photodynamic therapy (PDT) by means of optical coherence tomography angiography (OCT-A). A 40-year-old man had a complaint of decreasing visual acuity in his left eye for 10 days. A diagnosis of CCH was confirmed by fundus examination, fluorescein angiography, and indocyanine green angiography. An OCT-A study of choroidal lesion before and after PDT was carried out. Segmented en face OCT-A of CCH showed multiple irregular connected vascular channels with hyperflow and a capillary-like lesion...
October 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29035426/synthesis-of-bsa-coated-bioi-bi2-s3-semiconductor-heterojunction-nanoparticles-and-their-applications-for-radio-photodynamic-photothermal-synergistic-therapy-of-tumor
#11
Zhao Guo, Shuang Zhu, Yuan Yong, Xiao Zhang, Xinghua Dong, Jiangfeng Du, Jiani Xie, Qing Wang, Zhanjun Gu, Yuliang Zhao
Developing an effective theranostic nanoplatform remains a great challenge for cancer diagnosis and treatment. Here, BiOI@Bi2 S3 @BSA (bovine serum albumin) semiconductor heterojunction nanoparticles (SHNPs) for triple-combination radio/photodynamic/photothermal cancer therapy and multimodal computed tomography/photoacoustic (CT/PA) bioimaging are reported. On the one hand, SHNPs possess strong X-ray attenuation capability since they contain high-Z elements, and thus they are anticipated to be a very competent candidate as radio-sensitizing materials for radiotherapy enhancement...
October 16, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29016451/concurrent-idiopathic-macular-telangiectasia-type-2-and-central-serous-chorioretinopathy
#12
Alexandre Matet, Suzanne Yzer, Emily Y Chew, Alejandra Daruich, Francine Behar-Cohen, Richard F Spaide
PURPOSE: To describe cases presenting with features of idiopathic macular telangiectasia (MacTel) Type 2 and central serous chorioretinopathy (CSC). METHODS: Databases from four tertiary retina centers were searched for cases copresenting CSC and MacTel Type 2. RESULTS: Five cases were identified (4 men, 1 woman; mean age: 67.2 years). Four patients were referred for chronic or nonresolving CSC, and the diagnosis of MacTel Type 2 was made based on multimodal imaging findings...
October 9, 2017: Retina
https://www.readbyqxmd.com/read/28979117/triple-functional-albumin-based-nanoparticles-for-combined-chemotherapy-and-photodynamic-therapy-of-pancreatic-cancer-with-lymphatic-metastases
#13
Xinzhe Yu, Wenwen Zhu, Yang Di, Jichun Gu, Zhongyi Guo, Hengchao Li, Deliang Fu, Chen Jin
Lymphatic metastasis is the major metastatic pattern of pancreatic cancer and considered as an independent risk factor of survival. However, there is still no effective way for the diagnosis and treatment for lymphatic metastases of pancreatic cancer. In this study, using albumin as a carrier of gemcitabine (Gem), further modified by pyropheophorbide-a, we have designed and synthesized a nanoparticle (NP) compound named "pheophorbide-a (P@)-Gem-human serum albumin (HSA)-NPs". By utilization of its tracer ability of lymphatic metastases, which is triggered by near-infrared irradiation and its visible dying ability, the compound is used for drug delivery tracking, meanwhile as a treating drug, as well as the combined effect of photodynamic therapy and chemotherapy...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28978591/digital-lesion-leading-to-diagnosis-of-cholangiocarcinoma
#14
Dhauna Karam, Bharat Agrawal, Chandra Mouli
Cholangiocarcinomas (CCA) are uncommon malignancies that present late and have a poor prognosis. The patients may remain undiagnosed for many years because of non-specific presentation. CCA metastasises commonly to liver and adjacent lymph nodes. It can rarely metastasise to bone, lung, colon, pancreas, adrenal glands and spleen. Multiple treatment options are available including surgery, chemotherapy, radiotherapy and photodynamic therapy. The tumours have high rate of recurrence and most patients require palliative care...
October 4, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28971421/application-of-theranostics-in-oncology
#15
Georgios Lymperopoulos, Panagiotis Lymperopoulos, Victoria Alikari, Chrisoula Dafogianni, Sofia Zyga, Nikoletta Margari
In recent years, due to the development of nanotechnology new horizons in treatment and diagnosis of cancer open up. Development of nano-systems for simultaneous transfer of active substances and imaging of tumor regions gathers an important amount of scientific interest. This new category of nano-systems is called Theranostics. Theranostics methods can provide multiple benefits by inserting nanoparticles into the patient and using photodynamic therapy and pave the way for personalized medicine. The objective of this paper is to study the use and application of Theranostics in the diagnosis and treatment of cancer, in order to achieve personalized anticancer treatment...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28962578/intraoperative-5-aminolevulinic-acid-induced-photodynamic-diagnosis-of-metastatic-brain-tumors-with-histopathological-analysis
#16
R Yagi, S Kawabata, N Ikeda, N Nonoguchi, M Furuse, Y Katayama, Y Kajimoto, T Kuroiwa
BACKGROUND: Fluorescence-guided surgery using 5-aminolevulinic acid (5-ALA) is a promising real-time navigation method in the surgical resection of malignant gliomas. In order to determine whether this method is applicable to metastatic brain tumors, we evaluated the usefulness of intraoperative fluorescence patterns and histopathological features in patients with metastatic brain tumors. METHODS: We retrospectively reviewed the cases of 16 patients with metastatic brain tumors who underwent intraoperative 5-ALA fluorescence-guided resection...
September 29, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28933502/synthesis-and-evaluation-of-new-5-aminolevulinic-acid-derivatives-as-prodrugs-of-protoporphyrin-for-photodynamic-therapy
#17
Wei Zhu, Ying-Hua Gao, Chun-Hong Song, Zhi-Bin Lu, Tabbisa Namulinda, Yi-Ping Han, Yi-Jia Yan, Lai-Xing Wang, Zhi-Long Chen
Protoporphyrin IX (PpIX) is used as a photosensitizer in the photodynamic diagnosis (PDD) and photodynamic therapy (PDT) of cancer and is synthesized intracellularly from 5-aminolevulinic acid (5-ALA) precursors. Thirteen novel 5-ALA derivatives were designed and synthesized appropriately with tailored hydrophilicity and lipophilicity. The generation of PpIX was detected and their antitumor activity in vitro and in vivo was also investigated. It was shown that compounds 9b-c, 11b-c and 13a displayed a characteristic long wavelength absorption peak at 593 nm after 5 h incubation in mice fibrosarcoma S180 cells...
November 8, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28933283/organic-nanotheranostics-for-photoacoustic-imaging-guided-phototherapy
#18
Houjuan Zhu, Chen Xie, Peng Chen, Kanyi Pu
Phototherapies including photothermal therapy (PTT) and photodynamic therapy (PDT) have emerged as one of the avant-garde strategies for cancer treatment. Photoacoustic (PA) imaging is a new hybrid imaging modality that shows great promise for real-time in vivo monitoring of biological processes with deep tissue penetration and high spatial resolution. To enhance therapeutic efficiency and reduce side effects, it is necessary to explore the combination of cancer therapy and diagnosis. Nanotheranostics composed of PTT/PDT and PA imaging are emerging to provide unprecedented advantages in accelerating cancer theranostics...
September 20, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28932570/the-technique-of-endoscopic-airway-tumor-treatment
#19
REVIEW
Simone Scarlata, Lello Fuso, Gabriele Lucantoni, Francesco Varone, Daniele Magnini, Raffaele Antonelli Incalzi, Gianni Galluccio
More than half of primary lung cancers are not resectable at diagnosis and 40% of deaths may be secondary to loco-regional disease. Many of these patients suffer from symptoms related to airways obstruction. Indications for therapeutic endoscopic treatment are palliation of dyspnea and other obstructive symptoms in advanced cancerous lesions and cure of early lung cancer. Bronchoscopic management is also indicated for all those patients suffering from benign or minimally invasive neoplasm who are not suitable for surgery due to their clinical conditions...
August 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28916141/in-vivo-multimodal-tumor-imaging-and-photodynamic-therapy-with-novel-theranostic-agents-based-on-the-porphyrazine-framework-chelated-gadolinium-iii-cation
#20
Diana V Yuzhakova, Svetlana A Lermontova, Ilya S Grigoryev, Maria S Muravieva, Alena I Gavrina, Marina V Shirmanova, Irina V Balalaeva, Larisa G Klapshina, Elena V Zagaynova
BACKGROUND: A promising strategy for cancer diagnosis and therapy is the development of an agent for multimodal imaging and treatment. In the present paper we report on two novel multifunctional agents prepared on the porphyrazine pigment platform using a gadolinium (III) cation chelated by red-fluorescent tetrapyrrole macrocycles (GdPz1 and GdPz2). METHODS: Spectral and magnetic properties of the compounds were analyzed. Monitoring of GdPz1 and GdPz2 accumulation in the murine colon carcinoma CT26 was performed in vivo using fluorescence imaging and MRI...
December 2017: Biochimica et Biophysica Acta
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