Tag Archives: in vitro

In vitro illumination using ML8500: osmium-based anticancer photosensitizer with highest hypoxic activity reported to date

  Sherri McFarland discussing how ML8500 is supporting her research   Study protocol to determine wavelength, fluence, and irradiance activities of Os-4T:   Key observations Illumination parameters significantly affected the phototoxicity of Os-4T. The green light (525 nm) was more effective than the red light (630 nm) at lower fluences, while the maximal potency was achieved at both wavelengths when using fluences higher than 100 J/cm2. Irradiance affected the potency with both the red and the green light that were more effective when lower irradiances Continue reading →Customer case Research by: University of Texas at Arlington, US. One of the leading groups in photoactive drug discovery. Developed first clinical-level rubidium-based PS (TLD-1433), now in Theralase-sponsored Phase 2 trials for bladder cancer. Modulight products: ML8500 (445 nm, 525 nm, 630 nm, 753 nm, 810 nm) Laser use: Photoactive drug discovery Link to the study: Prof. Sherri McFarland Research topics: Medicinal inorganic chemistry and drug discovery. Special interest in the synthesis of novel transition metal complexes and studying their interactions with light for the purpose Continue reading →

Towards high-throughput light-activated drug discovery using automated plate illuminator

Published in: SPIE BIOS 2021 Authors: Robert Perttilä, John Roque III, Lasse Orsila, Zoe Ylöniemi, Elias Kokko, Colin G. Cameron, Sherri A. McFarland, Petteri Uusimaa  Published in: SPIE BIOS 2021 Authors: Robert Perttilä, John Roque III, Lasse Orsila, Zoe Ylöniemi, Elias Kokko, Colin G. Cameron, Sherri A. McFarland, Petteri Uusimaa There is an ongoing need in photodynamic therapy (PDT) research to develop highly active photosensitizers (PSs) with improved characteristics combined with optimized treatment protocols to produce effective treatment with minimal side effects. While several novel PSs have undergone clinical trials or been approved in recent years, there remain few available instrumentation options for high-throughput screens (HTS) with in vitro PDT. The Modulight ML8500 was developed to address this Continue reading →

Near-infrared Absorbing Ru(II) Complexes Act as Immunoprotective Photodynamic Therapy (PDT) Agents Against Aggressive Melanoma

Published in: Chemical Science Authors: Liubov M. Lifshits, A. Roque III, Prathyusha Konda, Susan Monro, Houston D. Cole, David von Dohlen, Susy Kim, Gagan Deep, Randolph P. Thummel, Colin G. Cameron, Shashi Gujar, Sherri A. McFarland    Published in: Chemical Science Authors: Liubov M. Lifshits, A. Roque III, Prathyusha Konda, Susan Monro, Houston D. Cole, David von Dohlen, Susy Kim, Gagan Deep, Randolph P. Thummel, Colin G. Cameron, Shashi Gujar, Sherri A. McFarland   9 novel Ru-based coordination complexes with different ligands were systematically synthetized and explored with aim to long wavelengths (>700 nm – >1000 nm depending on the compound) and high singlet oxygen quentum yeild for melanoma PDT. Light dosimetry and phototoxicities were studied in vitro (ML8500) and in vivo. Continue reading →

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

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

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 →

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 →

Breaking the selectivity‑uptake trade‑off of photoimmunoconjugates with nanoliposomal irinotecan for synergistic multi‑tier cancer targeting

Published in: Journal of Nanobiotechnology Authors: Barry J. Liang, Michael Pigula, Yan Baglo, Daniel Najafali , Tayyaba Hasan, Huang‑Chiao Huang    Published in: Journal of Nanobiotechnology Authors: Barry J. Liang, Michael Pigula, Yan Baglo, Daniel Najafali , Tayyaba Hasan, Huang‑Chiao Huang   The ML6600 laser was used to test the PDT efficacy of a novel photoimmunoconjugate-nanoliposome (PIC-Nal) comprising of EGFR-targeted Cetuximab, BPD photosensitizer and irinotecan chemoterapy inside a liposome. Different cancer cell lines were used and cell viability was determined after PDT.   Read the article here

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 →

Bioactive glass ions induce efficient osteogenic differentiation of human adipose stem cells encapsulated in gellan gum and collagen type I hydrogels

Published in: Materials Science & Engineering C Authors: Kaisa Vuornos, Miina Ojansivu, Janne T. Koivisto, Heikki Häkkänen, Birhanu Belay, Toni Montonen, Heini Huhtala, Minna Kääräinen, Leena Hupa, Minna Kellomäki, Jari Hyttinen, Janne A. Ihalainen, Susanna Miettinen    Published in: Materials Science & Engineering C Authors: Kaisa Vuornos, Miina Ojansivu, Janne T. Koivisto, Heikki Häkkänen, Birhanu Belay, Toni Montonen, Heini Huhtala, Minna Kääräinen, Leena Hupa, Minna Kellomäki, Jari Hyttinen, Janne A. Ihalainen, Susanna Miettinen   Laser was used as a light source for in-house-built Selective Plane Illumination Microscopy (SPIM) multimodal system for fluorescence imaging to study activation process of stem cell osteogenesis in hydrogels for bone constructs.   Read the article here

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 →