Tag Archives: PDT

Breaking the barrier: an osmium photosensitizer with unprecedented hypoxic phototoxicity for real world photodynamic therapy

August 3, 2020 by Modulight
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Published in: Chemical Science Authors: John A. Roque III, Patrick C. Barrett, Houston D. Cole, Liubov M. Lifshits, Ge Shi, Susan Monro, David von Dohlen, Susy Kim, Nino Russo, Gagan Deep, Colin G. Cameron, Marta E. Alberto, Sherri A. McFarland    Published in: Chemical Science Authors: John A. Roque III, Patrick C. Barrett, Houston D. Cole, Liubov M. Lifshits, Ge Shi, Susan Monro, David von Dohlen, Susy Kim, Nino Russo, Gagan Deep, Colin G. Cameron, Marta E. Alberto, Sherri A. McFarland   ML8500 was used for specialized dosimetry studies in the development of the osmium-based PS using similar drug development strategy as for the analogous Ru(II) series that resulted in TLD1433 (first metal complex in clinical trials). The Os-compound approaches the ideal properties with multi-wavelength activation Continue reading →

Heat shock protein 90-targeted photodynamic therapy enables treatment of subcutaneous and visceral tumors

May 8, 2020 by Modulight
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Published in: Communications Biology Authors: Kensuke Kaneko, Takuya Osada, Michael A. Morse, William R. Gwin, Joshua D. Ginzel, Joshua C. Snyder, Xiao-Yi Yang, Cong-Xiao Liu, Márcio A. Diniz, Khaldon Bodoor, Philip F. Hughes, Timothy AJ. Haystead, H. Kim Lyerly    Published in: Communications Biology Authors: Kensuke Kaneko, Takuya Osada, Michael A. Morse, William R. Gwin, Joshua D. Ginzel, Joshua C. Snyder, Xiao-Yi Yang, Cong-Xiao Liu, Márcio A. Diniz, Khaldon Bodoor, Philip F. Hughes, Timothy AJ. Haystead, H. Kim Lyerly   ML7710 was used for in vivo and ML8500 coupled to ML7710 for in vitro studies of HSP90-targeted verteporfin PDT for breast cancer. This strategy has both diagnostic and therapeutic potential across all breast cancer subtypes found up to few cm in depth, and may provide Continue reading →

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

March 12, 2020 by Modulight
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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

January 31, 2020 by Modulight
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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

January 24, 2020 by Modulight
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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

January 20, 2020 by Modulight
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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

August 10, 2019 by Modulight
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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   They have used laser to study PDT resistance mechanisms by activating BPD photosensitizer 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 article here

Modulight becomes exclusive supplier for BAUSCH + LOMB

December 4, 2018 by Seppo Orsila
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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

October 24, 2018 by Modulight
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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   Laser was used to activate Photofrin in interstitial PDT (I-PDT) optimization study testing the PDT effect of different laser irradiances in tumor-bearing mice & rabbits. Local tumor control was achieved, and incresing the irradiance was found to be associated with tissue heating.   Read the article here

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

August 28, 2018 by Modulight
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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   They have used laser for light-triggered release studies of calcein from ICG liposomes to optimize the liposome composition to be novel light-triggered drug carrier for PDT.   Read the article here