Tag Archives: PDT

High-resolution optoacoustic imaging of tissue responses to vascular-targeted therapies

Published in: Nature Biomedical Engineering Authors: Katja Haedicke, Lilach Agemy, Murad Omar, Andrei Berezhnoi, Sheryl Roberts, Camila Longo-Machado, Magdalena Skubal, Karan Nagar, Hsiao-Ting Hsu, Kwanghee Kim, Thomas Reiner, Jonathan Coleman, Vasilis Ntziachristos, Avigdor Scherz, Jan Grimm    Published in: Nature Biomedical Engineering Authors: Katja Haedicke, Lilach Agemy, Murad Omar, Andrei Berezhnoi, Sheryl Roberts, Camila Longo-Machado, Magdalena Skubal, Karan Nagar, Hsiao-Ting Hsu, Kwanghee Kim, Thomas Reiner, Jonathan Coleman, Vasilis Ntziachristos, Avigdor Scherz, Jan Grimm   Raster-scanning optoacoustic mesoscopy (RSOM) was used to monitor vascular responses to vascular-targeted PDT (VTP) with Tookad & ML7710 in mice with subcutaneous xenografts, showing immediate occlusion of tumor vessels, followed by collapse of the entire vasculature. Dual-wavelength RSOM distinguishes hemoglobin from oxyhemoglobin and provides improved spatial resolution that Continue reading →

Light Sources and Dosimetry Techniques for Photodynamic Therapy

Published in: Photochemistry and Photobiology Authors: Michele M. Kim, Arash Darafsheh  Published in: Photochemistry and Photobiology Authors: Michele M. Kim, Arash Darafsheh   Effective treatment delivery in photodynamic therapy (PDT) requires coordination of the light source, the photosensitizer, and the delivery device appropriate to the target tissue. Lasers, light-emitting diodes (LEDs), and lamps are the main types of light sources utilized for PDT applications. The choice of light source depends on the target location, photosensitizer used, and light dose to be delivered. Geometry of minimally accessible areas also plays a role in deciding light applicator type. Continue reading →

Combination of ALA-induced fluorescence-guided resection and intraoperative open photodynamic therapy for recurrent glioblastoma: case series on a promising dual strategy for local tumor control

Published in: Journal of Neurosurgery Authors: Stephanie Schipmann, Michael Müther, Louise Stögbauer, Sebastian Zimmer, Benjamin Brokinkel, Markus Holling, Oliver Grauer, Eric Suero Molina, Nils Warneke, Walter Stummer    Published in: Journal of Neurosurgery Authors: Stephanie Schipmann, Michael Müther, Louise Stögbauer, Sebastian Zimmer, Benjamin Brokinkel, Markus Holling, Oliver Grauer, Eric Suero Molina, Nils Warneke, Walter Stummer   Report on results from intraoperative open PDT compassionate care of 20 recurrent glioblastoma patients. ML7710 was used only for PDT (Zeiss surgical microscope used for fluorescence visualization of PPIX). Results suggest that combining PDT with 5-ALA FGR (fluorescence-guided resection) is effective (effect of PDT was seen in 80% of patients) and safe (only one adverse event was Continue reading →

Acute cellular and vascular responses to photodynamic therapy using EGFR-targeted nanobody-photosensitizer conjugates studied with intravital optical imaging and magnetic resonance imaging

Published in: Theranostics Authors: Henriette S. de Bruijn, Vida Mashayekhi, Tom J.L. Schreurs, Pieter B.A.A. van Driel, Gustav J. Strijkers, Paul J. van Diest, Clemens W.G.M. Lowik, Ann L.B. Seynhaeve, Timo L.M. ten Hagen, Jeanine J. Prompers, Paul M.P. van Bergen en Henegouwen, Dominic J. Robinson, Sabrina Oliveira    Published in: Theranostics Authors: Henriette S. de Bruijn, Vida Mashayekhi, Tom J.L. Schreurs, Pieter B.A.A. van Driel, Gustav J. Strijkers, Paul J. van Diest, Clemens W.G.M. Lowik, Ann L.B. Seynhaeve, Timo L.M. ten Hagen, Jeanine J. Prompers, Paul M.P. van Bergen en Henegouwen, Dominic J. Robinson, Sabrina Oliveira   Laser was used to study the effectiveness of two EGFR-targeted nanobody-photosensitizer (IRDye700DX) conjugates for PDT both in vivo and in vitro. The biodistribution (by fluorescence imaging), cellular responses and vascular effects of the two prepared conjugates Continue reading →

Porphyrin-lipid assemblies and nanovesicles overcome ABC transporter-mediated photodynamic therapy resistance in cancer cells

Published in: Cancer Letters Authors: Yan Baglo, Barry J. Liang, Robert W. Robey, Suresh V. Ambudkar, Michael M. Gottesman, Huang-Chiao Huang    Published in: Cancer Letters Authors: Yan Baglo, Barry J. Liang, Robert W. Robey, Suresh V. Ambudkar, Michael M. Gottesman, Huang-Chiao Huang   The study investigates the transport and retention of benzoporphyrin derivative (BPD) photosensitizers in cancer cells, focusing on the role of various ATP-binding cassette (ABC) transporters. The team studied PDT resistance mechanisms by activating BPD in cancer cell lines and subsequently determining the cell viabilities. The lipidation of BPD is shown to decrease its efflux from cells and increase PDT effectiveness.   Read the Continue reading →

Modulight becomes exclusive supplier for BAUSCH + LOMB

BRIDGEWATER, N.J., December 04, 2018 – Bausch + Lomb, a leading global eye health company, and Modulight, Inc., a designer and manufacturer of lasers and optics for personalized medicine, announced the companies have entered into an exclusive agreement to collaborate and develop a new photodynamic laser specifically designed for use with Bausch + Lomb’s VISUDYNE® (verteporfin for injection) therapy. “Photodynamic therapy continues to be an important option for eye care professionals who treat choroidal neovascularization in patients who suffer from persistent disease activity, but the availability of lasers capable Continue reading →

Irradiance controls photodynamic efficacy and tissue heating in experimental tumours: implication for interstitial PDT of locally advanced cancer

Published in: British Journal of Cancer Authors: Gal Shafirstein, David A. Bellnier, Emily Oakley, Sasheen Hamilton, Michael Habitzruther, Lawrence Tworek, Alan Hutson, Joseph A. Spernyak, Sandra Sexton, Leslie Curtin, Steven G. Turowski, Hassan Arshad, Barbara Henderson    Published in: British Journal of Cancer Authors: Gal Shafirstein, David A. Bellnier, Emily Oakley, Sasheen Hamilton, Michael Habitzruther, Lawrence Tworek, Alan Hutson, Joseph A. Spernyak, Sandra Sexton, Leslie Curtin, Steven G. Turowski, Hassan Arshad, Barbara Henderson   Currently delivered light dose (J/cm2) is the principal parameter guiding interstitial photodynamic therapy (I-PDT) of refractory locally advanced cancer. The aim of this study was to investigate the impact of light dose rate (irradiance, mW/cm2) and associated heating on tumour response and cure. Laser was used to activate Continue reading →

The effect of light sensitizer localization on the stability of indocyanine green liposomes

Published in: Journal of Controlled Release Authors: Tatu Lajunen, Riikka Nurmi, Danny Wilbie, Teemu Ruoslahti, Niklas G. Johansson, Ossi Korhonen, Tomasz Rog, Alex Bunker, Marika Ruponen, Arto Urtti    Published in: Journal of Controlled Release Authors: Tatu Lajunen, Riikka Nurmi, Danny Wilbie, Teemu Ruoslahti, Niklas G. Johansson, Ossi Korhonen, Tomasz Rog, Alex Bunker, Marika Ruponen, Arto Urtti   Targeted delivery of drugs using external light trigger is feasible in light-accessible organs, e.g. eye and skin, and it may offer several benefits compared to passive drug leakage from the drug carrier. The research group has used ML6600 laser and illumination kit (MLAKIT) for light-triggered release studies of calcein from ICG liposomes to optimize the liposome composition Continue reading →

An Infrared Dye–Conjugated Virus-like Particle for the Treatment of Primary Uveal Melanoma

Published in: Molecular Cancer Therapeutics Authors: Rhonda C. Kines, Isabella Varsavsky, Sanghamitra Choudhary, Debaditya Bhattacharya, Sean Spring, Roger McLaughlin, Shin J. Kang, Hans E. Grossniklaus, Demetrios Vavvas, Stephen Monks, John R. MacDougall, Elisabet de los Pinos, and John T. Schiller    Published in: Molecular Cancer Therapeutics Authors: Rhonda C. Kines, Isabella Varsavsky, Sanghamitra Choudhary, Debaditya Bhattacharya, Sean Spring, Roger McLaughlin, Shin J. Kang, Hans E. Grossniklaus, Demetrios Vavvas, Stephen Monks, John R. MacDougall, Elisabet de los Pinos, and John T. Schiller   The research group studied a novel recombinant papillomavirus-like particle (VLP) drug conjugate and its initial evaluation as a potential treatment for primary uveal melanoma. Laser was used for evaluating tumor-specific targeting and cellular toxicity of their novel IRDye 700DX-conjugated papillomavirus-like particle (AU-011) in vitro Continue reading →

WST11 Vascular Targeted Photodynamic Therapy Effect Monitoring by Multispectral Optoacoustic Tomography (MSOT) in Mice

Published in: Theranostics Authors: Volker Neuschmelting, Kwanghee Kim, Jaber Malekzadeh-Najafabadi, Sylvia Jebiwott, Jaya Prakash, Avigdor Scherz, Jonathan A. Coleman, Moritz F. Kircher, Vasilis Ntziachristos    Published in: Theranostics Authors: Volker Neuschmelting, Kwanghee Kim, Jaber Malekzadeh-Najafabadi, Sylvia Jebiwott, Jaya Prakash, Avigdor Scherz, Jonathan A. Coleman, Moritz F. Kircher, Vasilis Ntziachristos   The research group studied vascular-targeted photodynamic therapy (VTP). They used laser to activate Tookad (WST11) photosensitizer in VTP using renal cancer mouse model to develop multispectral optoacoustic tomography (MSOT) monitoring method for VTP.   Read the article here