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https://www.readbyqxmd.com/read/29774871/-progression-of-basic-research-clinical-application-of-photodynamic-therapy-and-fluorescence-guided-surgery-in-glioma-treatment
#1
Xuegang Li, Hua Feng, Fei Li
The prognosis of glioma remains poor because of the infiltrative nature and the high local relapse rate. The current goals for patients with gliomas is maximal safe resection and adjuvant therapy. Tumor-specific photosensitizer, such as hematoporphyrin derivative (HpD) 5-aminolevulinic acid (5-ALA), can be selective up-taken and accumulated in tumor tissue. Light with appropriate wavelength can penetrate tumor tissue and excite the photosensitizer. The excited photosensitizer within glioma cells permits fluorescence visualization of tumor tissue during surgery and has been introduced in treatment of glioma as fluorescence-guided surgery (FGS)...
April 28, 2018: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29766937/enhanced-resection-of-primary-high-grade-gliomas-using-a-combination-of-intraoperative-magnetic-resonance-imaging-and-intraoperative-fluorescence-5-aminolevulinic-acid-a-single-centre-experience
#2
Vikas Sharma, Rishabh Kedia, Karanjit S Narang, Ajaya N Jha
Background: The extent of resection (EOR) of a tumor is a proven prognostic factor in patients undergoing surgery for suspected high grade glioma. A few recent publications have shown the importance of intraoperative magnetic resonance imaging (iMRI) with 5-aminolevulinic acid (5-ALA) fluorescence-guidance in order to maximally increase the EOR. Aim: The objective of our study was to calculate the effect on survival of patients with high grade gliomas of resection using both iMRI and 5-ALA fluorescence-guidance as intraoperative adjuncts...
May 2018: Neurology India
https://www.readbyqxmd.com/read/29760987/5-ala-fluorescence-and-laser-doppler-flowmetry-for-guidance-in-a-stereotactic-brain-tumor-biopsy
#3
Neda Haj-Hosseini, Johan C O Richter, Peter Milos, Martin Hallbeck, Karin Wårdell
A fiber optic probe was developed for guidance during stereotactic brain biopsy procedures to target tumor tissue and reduce the risk of hemorrhage. The probe was connected to a setup for the measurement of 5-aminolevulinic acid (5-ALA) induced fluorescence and microvascular blood flow. Along three stereotactic trajectories, fluorescence (n = 109) and laser Doppler flowmetry (LDF) (n = 144) measurements were done in millimeter increments. The recorded signals were compared to histopathology and radiology images...
May 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29737540/5-ala-in-the-management-of-malignant-glioma
#4
REVIEW
Herbert Stepp, Walter Stummer
BACKGROUND: Patients suffering from malignant gliomas have a poor prognosis. For the surgical treatment of these tumors, 5-aminolevulinic acid (5-ALA) has become a new standard. AIMS: This review intends to provide an overview over current status, significance, limitations, and future perspectives of 5-ALA based fluorescence guided surgery and photodynamic therapy for brain tumor patients. MATERIALS AND METHODS: From peer reviewed publications on the many aspects connected with this topic, those with potential clinical relevance were selected and put in the context of our own experience...
May 8, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29721068/enhancement-of-cancer-specific-protoporphyrin-ix-fluorescence-by-targeting-oncogenic-ras-mek-pathway
#5
Ema Yoshioka, Vipin Shankar Chelakkot, Maria Licursi, Suzette G Rutihinda, Jayoti Som, Leena Derwish, Justin J King, Theerawat Pongnopparat, Karen Mearow, Mani Larijani, Ann M Dorward, Kensuke Hirasawa
Protoporphyrin IX (PpIX) is an endogenous fluorescent molecule that selectively accumulates in cancer cells treated with the heme precursor 5-aminolevulinic acid (5-ALA). This cancer-specific accumulation of PpIX is used to distinguish tumor from normal tissues in fluorescence-guided surgery (FGS) and to destroy cancer cells by photodynamic therapy (PDT). In this study, we demonstrate that oncogenic Ras/mitogen-activated protein kinase kinase (MEK) pathway can modulate PpIX accumulation in cancer cells. Methods: To identify Ras downstream elements involved in PpIX accumulation, chemical inhibitors were used...
2018: Theranostics
https://www.readbyqxmd.com/read/29708549/an-in-vitro-model-to-study-the-effect-of-5-aminolevulinic-acid-mediated-photodynamic-therapy-on-staphylococcus-aureus-biofilm
#6
Ke-Qing Zhao, Yang Wu, Yu-Xi Yi, Si-Jia Feng, Ruo-Yan Wei, Ying Ma, Chun-Quan Zheng, Di Qu
Staphylococcus aureus (S. aureus) is a common human pathogen, which causes pyogenic and systemic infections. S. aureus infections are difficult to eradicate not only due to the emergence of antibiotic-resistant strains but also its ability to form biofilms. Recently, photodynamic therapy (PDT) has been indicated as one of the potential treatments for controlling biofilm infections. However, further studies are required to improve our knowledge of its effect on bacterial biofilms, as well as the underlying mechanisms...
April 16, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29681816/fluorescent-light-guided-cystoscopy-with-5-ala-aids-in-accurate-surgical-margin-detection-for-turbo-a-case-report
#7
Daiji Takamoto, Takashi Kawahara, Shinji Ohtake, Taku Mochizuki, Shinnosuke Kuroda, Noboru Nakaigawa, Koji Izumi, Yasuhide Miyoshi, Kazuhide Makiyama, Masahiro Yao, Tomoe Sawazumi, Yoshiaki Inayama, Junichi Ohta, Hiroji Uemura
Recent studies have revealed that transurethral resection in one piece (TURBO) has several benefits over standard transurethral resection of bladder tumor (TUR-Bt), including a higher rate of containing the bladder muscle tissue and single-block resection. Five-aminolevulinic acid (5-ALA) was approved for the detection of bladder tumor treated with TUR-Bt. A 71-year-old male patient who received right nephroureterectomy developed bladder tumor recurrence on routine cystoscopy follow-up. We planned TURBO using fluorescent light-guided cystoscopy with 5-ALA...
January 2018: Case Reports in Oncology
https://www.readbyqxmd.com/read/29670350/colloidal-plasmonic-gold-nanoparticles-and-gold-nanorings-shape-dependent-generation-of-singlet-oxygen-and-their-performance-in-enhanced-photodynamic-cancer-therapy
#8
Yamin Yang, Yue Hu, Henry Du, Lei Ren, Hongjun Wang
Introduction: In recognition of the potentials of gold nanoparticles (Au NPs) in enhanced photodynamic therapy (PDT) for cancer, it is desirable to further understand the shape-dependent surface plasmonic resonance (SPR) properties of various gold nanostructures and evaluate their performances in PDT. Materials and methods: Monodispersed colloidal spherical solid Au NPs were synthesized by UV-assisted reduction using chloroauric acid and sodium citrate, and hollow gold nanorings (Au NRs) with similar outer diameter were synthesized based on sacrificial galvanic replacement method...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29663426/comparison-of-blue-and-white-lamp-light-with-sunlight-for-daylight-mediated-5-ala-photodynamic-therapy-in-vivo
#9
Kayla Marra, Ethan P LaRochelle, M Shane Chapman, P Jack Hoopes, Karina Lukovits, Edward V Maytin, Tayyaba Hasan, Brian W Pogue
Daylight-mediated photodynamic therapy (d-PDT) as a treatment for actinic keratosis (AK) is an increasingly common technique due to a significant reduction in pain, leading to better patient tolerability. While past studies have looked at different light sources and delivery methods, this study strives to provide equivalent PpIX-weighted light doses with the hypothesis that artificial light sources could be equally as effective as natural sunlight if their PpIX-weighted fluences were equalized. Normal mouse skin was used as the model to compare blue LED light, metal halide white light, and natural sunlight, with minimal incubation time between topical ALA application and the onset of light delivery...
April 16, 2018: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29650943/-a-useful-case-of-photodynamic-diagnosis-of-inferior-vena-cava-invasion-by-pancreatic-head-cancer-using-5-aminolevulinic-acid-5-ala
#10
Toru Mizutani, Yasutoshi Murayama, Hisashi Ikoma, Tomohiro Arita, Toshiyuki Kosuga, Hirotaka Konishi, Ryo Morimura, Atsushi Shiozaki, Yoshiaki Kuriu, Masayoshi Nakanishi, Hitoshi Fujiwara, Kazuma Okamoto, Eigo Otsuji
Curative resection is necessary to survival in pancreatic cancer, however after surgery, pathologic examination sometimes diagnoses the remains of cancer at the resected stump. Therefore, it is necessary to evaluate the stump by intraoperative rapid pathological examination. 5-aminolevulinic acid(5-ALA)is an endogenous natural amino acid and precursor of the heme pathway. 5-ALA is metabolized and accumulated as protoporphyrin IX(Pp IX)that is photosensitive substance. 5-ALA mediated photodynamic diagnosis(PDD)(ALA-PDD)has high diagnostic ability...
March 2018: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29627657/design-synthesis-and-in-vitro-evaluation-of-%C3%AE-glucuronidase-sensitive-prodrug-of-5-aminolevulinic-acid-for-photodiagnosis-of-breast-cancer-cells
#11
V Herceg, S Adriouach, K Janikowska, E Allémann, N Lange, A Babič
Treatment of cancer cells by clinically approved hexyl ester of 5-aminolevulinic acid (ALA-Hex) induces accumulation of fluorescent porphyrins in tumors. This allows fluorescence photodiagnosis (PD) of bladder cancer by blue light illumination. However, PD of other cancers is hampered by acute toxicity of the compound limiting its use to local applications. We have designed and synthesized a new prodrug of ALA-Hex that tackles the stability-activity paradox of amino-modified 5-ALA prodrugs. The glucuronide prodrug Glu-ALA-Hex demonstrates excellent stability under physiological conditions and activation in the presence of the target enzyme...
March 30, 2018: Bioorganic Chemistry
https://www.readbyqxmd.com/read/29581022/neuro-endoscopic-cylinder-surgery-and-5-aminolevulinic-acid-5-ala-photodynamic-diagnosis-of-deep-seated-intracranial-lesions
#12
Jungsu Choo, Kazuhito Takeuchi, Yuichi Nagata, Fumiharu Ohka, Yugo Kishida, Tadashi Watanabe, Yusuke Satoh, Tetsuya Nagatani, Kyozo Kato, Toshihiko Wakabayashi, Atsushi Natsume
BACKGROUND: Microscopic detection of intracranial brain tumors with 5-aminolevulinic acid (5-ALA) has proven extremely useful, and reports the use of 5-ALA have recently increased. However, few reports have described 5-ALA photodynamic diagnosis (PDD) using a neuro-endoscope. We performed neuro-endoscopic 5-ALA PDD for various brain lesions and present a procedure using only a neuro-endoscope. METHODS: We describe the diagnosis of 20 intracranial brain lesion cases with a 5-ALA-guided fluorescence endoscope...
March 23, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29573627/intraoperative-enhanced-imaging-for-detection-of-endometriosis-a-systematic-review-of-the-literature
#13
REVIEW
Mahdi Al-Taher, Shugi Hsien, Rutger M Schols, Nehalennia Van Hanegem, Nicole D Bouvy, Gerard A J Dunselman, Laurents P S Stassen
The diagnosis of peritoneal endometriosis during laparoscopy may be difficult due to the polymorphic aspects of the lesions. Enhanced imaging using contrast agents has potential to provide a better identification of peritoneal endometriosis. The aim of this systematic review is to provide an overview of the literature on what is known about the intraoperative laparoscopic visual enhancement of peritoneal endometriosis using contrast agents. A systematic review was done of studies about enhanced imaging during laparoscopy for endometriosis using contrast agents...
March 15, 2018: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29541490/false-positive-inflammatory-change-mimicking-glioblastoma-multiforme-under-5-aminolevulinic-acid-guided-surgery-a-case-report
#14
Koji Omoto, Ryosuke Matsuda, Ichiro Nakagawa, Yasushi Motoyama, Hiroyuki Nakase
Background: 5-aminolevulinic acid (5-ALA)-guided surgery is one of the gold standard perioperative modalities for maximum resection of malignant gliomas. However, it should be noted that 5-ALA fluorescence does not definitively indicate the presence of malignant tumor cells. Case Description: We report a rare case of false-positive lesion mimicking glioblastoma multiforme (GBM) under 5-ALA-guided surgery. A 44-year-old woman presented with persistent headache and flickering in her eyes...
2018: Surgical Neurology International
https://www.readbyqxmd.com/read/29538709/in-vitro-use-of-5-ala-for-photodynamic-therapy-in-pediatric-brain-tumors
#15
Michael Schwake, Andrei Nemes, Jana Dondrop, Juliane Schroeteler, Stephanie Schipmann, Volker Senner, Walter Stummer, Christian Ewelt
BACKGROUND: Light irradiation (635 nm) of cells containing protoporphyrin IX (PPIX) after 5- aminolevulinic acid (5-ALA) pretreatment causes cell death via different pathways including apoptosis and necrosis, as previously demonstrated for malignant glioma cells. OBJECTIVE: To elucidate whether various malignant pediatric brain tumors, which have been shown to accumulate PPIX, would also be susceptible to photodynamic therapy (PDT). METHODS: Medulloblastoma (DAOY, UW228), pNET (PFSK-1), and rhabdoid tumor (BT16) cell lines were incubated with 5-ALA in variable concentrations for 4 h...
March 12, 2018: Neurosurgery
https://www.readbyqxmd.com/read/29509373/combined-use-of-mr-pet-and-5-ala-for-neurosurgical-management-of-recurrent-multiple-malignant-hemangiopericytomas
#16
Doortje C Engel, Simone Peraio, Sotirios Bisdas, Jens Schittenhelm, Marcos Tatagiba
No abstract text is available yet for this article.
March 6, 2018: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/29461242/photodynamic-treatment-with-nanoemulsified-5-aminolevulinic-acid-and-narrow-band-red-light-for-field-cancerization-due-to-occupational-exposure-to-ultraviolet-light-irradiation
#17
U Wollina, B Gaber, A Koch
Actinic keratosis (AK) is a premalignant epithelial disease that develops on skin chronically exposed to ultraviolet-light. For outdoor workers, AK is an occupational hazard with a potential for malignant transformation into squamous cell carcinoma. Various topical treatments are used to treat AK's. Photodynamic therapy (PDT) promises the highest cure rates. We performed a prospective single center trial evaluating effects of PDT treatment for field cancerization due to occupational exposure to ultraviolet light irradiation in patients unresponsive to the treatment regimen with topical diclofenac gel...
January 2018: Georgian Medical News
https://www.readbyqxmd.com/read/29460964/comparison-between-8-methoxypsoralen-and-5-aminolevulinic-acid-in-killing-t-cells-of-photopheresis-patients-ex-vivo
#18
Toril Holien, Odrun Arna Gederaas, Sagar Ramesh Darvekar, Eidi Christensen, Qian Peng
BACKGROUND AND OBJECTIVE: Extracorporeal photopheresis (ECP), an established modality for cutaneous T-cell lymphoma (CTCL) and graft-versus-host disease, involves ex vivo treatment of isolated leukocytes of a patient with the photosensitizing drug 8-methoxypsoralen (8-MOP) and ultraviolet-A (UV-A) exposure before reinfusion back to the patient. However, 8-MOP binds to both diseased and normal cells and thus kills both types of the cells after UV-A illumination with little selectivity...
February 20, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29450654/visualizing-protoporphyrin-ix-formation-in-the-dura-tail-of-meningiomas-by-mass-spectrometry-imaging
#19
Benjamin Brokinkel, Sabrina Kröger, Volker Senner, Astrid Jeibmann, Uwe Karst, Walter Stummer
BACKGROUND: The advantages of 5-aminolevulinacid (5-ALA)-induced fluorescence-guided surgery in meningiomas are increasingly discussed. In this context, despite detectable tumor tissue in histopathologial analyses, no fluorescence was shown at the dura tail using the standard operating microscope. Thus, 5-ALA metabolism in this surgically important site remains unknown but needs to be elucidated when further evaluating indications of fluorescence-guided surgery in meningiomas. METHOD: We here present the spatially resolved identification of protoporphyrin IX (PpIX) in sphenoid ridge meningioma cryosections from a patient who underwent fluorescence-guided microsurgery using molecular imaging analysis by matrix-assisted laser desorption/ionization tandem mass spectrometry (MALDI-MS/MS)...
February 15, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29426920/verification-of-radiodynamic-therapy-by-medical-linear-accelerator-using-a-mouse-melanoma-tumor-model
#20
Junko Takahashi, Mami Murakami, Takashi Mori, Hitoshi Iwahashi
Combined treatment with 5-aminolevulinic acid (5-ALA) and X-rays improves tumor suppression in vivo. This is because the accumulated protoporphyrin IX from 5-ALA enhances the generation of ROS by the X-ray irradiation. In the present study, a high-energy medical linear accelerator was used instead of a non-medical low energy X-ray irradiator, which had been previously used. Tumor-bearing mice implanted with B16-BL6 melanoma cells were treated with fractionated doses of irradiation (in total, 20 or 30 Gy), using two types of X-ray irradiator after 5-ALA administration...
February 9, 2018: Scientific Reports
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