Tag Archives: in vitro

Light-induced drug delivery with indocyanine green liposomes

August 30, 2022 by Modulight Content
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Introduction to light-controlled drug delivery systems Study description It is important that light-triggered liposomes efficiently release their contents, while the liposome stability should be maintained in the absence of laser light. The aim of this study is to determine how liposomal stability and drug release are affected by liposomal formulation. Indocyanine green was used as the light-sensitizing compound in the liposomes since it is clinically approved light-sensitive agent. Three different liposomal formulations were prepared: Formulation A: ICG in the aqueous core, liposomes coated Formulation B: ICG in the liposomal Continue reading →Customer case Faculty of Pharmacy at University of Helsinki is specialized in top-level pharmaceutical research. Multidisciplinary research fields include clinical pharmacy, experimental drugs, nanomedicines, and pharmaceutical drug design. Drug delivery unit led by Professor Arto Urtti focuses on design and testing of advanced drug delivery systems especially for ocular indications. Light is studied as an important tool to control the drug delivery to the target tissues. Modulight products: ML6600 (810 nm) + Modulight in vitro illumination kit (MLAKIT) Professor Arto Urtti   Senior Pharmaceutical Researcher Tatu Continue reading →

Cyanine Phototruncation Enables Spatiotemporal Cell Labeling

June 13, 2022 by Modulight Content
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Published in: Journal of the American Chemical Society Authors: Hiroshi Fukushima, Siddharth S. Matikonda, Syed Muhammad Usama, Aki Furusawa, Takuya Kato, Lenka Štacková, Petr Klán, Hisataka Kobayashi, Martin J. Schnermann  Published in: Journal of the American Chemical Society Authors: Hiroshi Fukushima, Siddharth S. Matikonda, Syed Muhammad Usama, Aki Furusawa, Takuya Kato, Lenka Štacková, Petr Klán, Hisataka Kobayashi, Martin J. Schnermann In this study, phototruncation-assisted cell tracking (PACT) was developed to enable spatiotemporal tracking of immune cell populations in vivo. It is based on cyanine photoconversion reaction that leads to 2-carbon truncation and blue shift in the emission wavelength when irradiated with NIR light. ML6600 (780 nm) was used to induce photoconversion both in vitro and Continue reading →

CD29 targeted near-infrared photoimmunotherapy (NIR-PIT) in the treatment of a pigmented melanoma model

January 4, 2022 by Modulight Content
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Published in: OncoImmunology Authors: Aki Furusawa, Ryuhei Okada, Fuyuki Inagaki, Hiroaki Wakiyama, Takuya Kato, Hideyuki Furumoto, Hiroshi Fukushima, Shuhei Okuyama, Peter L. Choyke, Hisataka Kobayashi    Published in: OncoImmunology Authors: Aki Furusawa, Ryuhei Okada, Fuyuki Inagaki, Hiroaki Wakiyama, Takuya Kato, Hideyuki Furumoto, Hiroshi Fukushima, Shuhei Okuyama, Peter L. Choyke, Hisataka Kobayashi   The study aimed to develop photoimmunotherapy for pigmented melanoma, which can challenging indication since the pigment could absorb light and make treatment ineffective. In vitro & in vivo studies with ML7710 laser compared PIT against pigmented and non-pigmented melanoma and found no differences. CD29 targeted PIT was more effective than CD44 targeted PIT, relating to expression of CD44 on Continue reading →

Multimodal imaging microscope for tissue engineering applications

September 14, 2021 by Modulight Content
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  Motivation for the study Tissue engineering is an evolving field of medicine that aims to grow new viable tissue for repairing or regenerating damaged tissues in the body. These tissue constructs are typically made by placing cells in support matrices that have proper growth-inducing factors. However, visualizing the development and composition of these tissue constructs is challenging with currently available optical imaging methods: they are either not capable of producing 3D images at sufficient depth or lack the bright-field imaging functionality. To answer this Continue reading →Customer case Research by: Computational biophysics and imaging research group at Tampere University. Research topics include development of bioimaging, analysis and biophysics based in-silico tools for new personalized treatments and diagnostics. Modulight products: ML6600 (488, 561, and 638 nm) Laser use: Light source for in-house built multimodal 3D imaging microscope used for imaging tissue engineering processes and products.   Professor Jari Hyttinen     Link to the study:   Toni Montonen, Doctoral Researcher     Motivation for the study Tissue engineering is an evolving field of Continue reading →

Antimicrobial PDT for prosthetic joint infections

August 21, 2021 by Modulight Content
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Motivation for the study Periprosthetic joint infections after hip and knee replacement surgeries are associated with high patient morbidity and a large financial cost. Challenging two-stage revision surgeries are required with long antibiotics regimes that can have limited efficacy and cannot eradicate drug-resistant strains like MRSA (methicillin-resistant Staphylococcus aureus). This study aims to investigate the potential of photodynamic therapy with methylene blue to eradicate problematic bacteria associated with joint infections.   Results Photos from the original publication. Reproduced under Creative Commons Attribution 4.0 International License. Continue reading →Customer case Royal National Orthopaedic Hospital at UCL, Stanmore in London, UK is an internationally leading Centre of Excellence and tertiary referral centre for complex orthopedic conditions. Close collaboration between clinicians and engineers facilitates high-quality research into orthopedic implant fixation and bone regeneration. The focus is on translational themes that include biomaterials, stem cells, the design and follow-up of implants, bone graft substitute materials and implant infections. PDT has been studied as an alternative to antibiotics to more effectively tackle infections following hip & knee Continue reading →

Photothermal therapy with platinum nanoparticles

August 16, 2021 by Modulight Content
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Photothermal therapy efficiency Human ovarian cancer cells were plated on Petri dishes and incubated with platinum nanoparticles of varying sizes between 30 and 70 nm. After 24-hour incubation, irradiation was performed using a Modulight ML6600 laser at 808 nm together with an illumination kit (MLAKIT) tailored for Petri dish illumination. A small area of the dish was illuminated with the laser for five minutes with 45 W/cm2 irradiance. Calcein cell viability staining was performed 24 hours after the laser treatment and cells were examined with a Continue reading →Customer case Experimental Biophysics and Optical Manipulation research group studies biophysical properties of the cells using advanced optical techniques like optical trapping and nanoscale thermoplasmonics. Biophysical studies include the dynamics of plasma membrane, the effect of proteins on the membrane mechanisms of plasma membrane ruptures. Another important research area is photothermal therapy (PTT) using near-infrared laser to heat metallic nanoparticles. This heating of nanoparticles is also studied to deliver RNA therapeutics into the tumor tissue.  PET imaging is used to monitor treatment effects. Modulight products: ML6600 Continue reading →

Nanobody-targeted photodynamic therapy for the treatment of feline oral carcinoma: a step towards translation to the veterinary clinic

August 2, 2021 by Modulight Content
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Published in: Nanophotonics Authors: Irati Beltrán Hernández, Guillaume C.M. Grinwis, Alessia Di Maggio, Paul M.P. van Bergen en Henegouwen, Wim E. Hennink, Erik Teske, Jan W. Hesselink, Sebastiaan A. van Nimwegen, Jan A. Mol, Sabrina Oliveira    Published in: Nanophotonics Authors: Irati Beltrán Hernández, Guillaume C.M. Grinwis, Alessia Di Maggio, Paul M.P. van Bergen en Henegouwen, Wim E. Hennink, Erik Teske, Jan W. Hesselink, Sebastiaan A. van Nimwegen, Jan A. Mol, Sabrina Oliveira   Nanobody-targeted PDT was shown in vitro to be suitable and efficient for oral carcinoma, which expresses EGFR. Modulight laser was used as an illumination source to activate PDT. Next aim is to treat cats with oral carcinoma before advancing to human clinic.   Read the article here

Novel antimicrobial phototherapy against emerging infectious diseases

June 12, 2021 by Modulight Content
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      Results PIAS-treated pathogens were effectively eradicated upon NIR illumination. The efficacy of PIAS was dependent on the NIR light dose, 50 J/cm2 eradicating all MRSA from the rat nasal tract (Figure 1). PIAS also saved all mice from fatal MRSA infections, similar to VCM+RFP antibiotics and even more effectively than VCM antibiotics alone (Figure 2). Unlike the antibiotics, PIAS acted selectively on the target pathogen and did not affect host’s normal intestinal microflora (Figure 3). Also generation of microbial resistance, common problem Continue reading →Customer case Research by: The Jikei University School of Medicine located in Tokyo, Japan and founded in 1881 is today one of the three major private medical schools in Japan. This cutting-edge study was done in close collaboration with Professor Hisataka Kobayashi’s Laboratory of Molecular Theranostics at National Cancer Institute. Modulight products: ML6500 (689 nm, 3 W)   Dr. Makoto Mitsunaga, M.D., PhD   Dr. Tadayuki Iwase, PhD   Dr. Hisataka Kobayashi, M.D., PhD Laser use: Photoimmunotherapy and photochemotherapy of cancer (pancreatic, breast, gastric) and infectious Continue reading →

Virus-like particle-drug conjugates induce protective, long-lasting adaptive anti-tumor immunity in the absence of specifically targeted tumor antigens

June 1, 2021 by Modulight Content
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Published in: Cancer Immunology Research Authors: Rhonda C Kines, Cynthia D Thompson, Sean Spring, Zhenyu Li, Elisabet de los Pinos, Stephen Monks, John T Schiller       Related application note: Vision-sparing targeted phototherapy for uveal melanoma  Published in: Cancer Immunology Research Authors: Rhonda C Kines, Cynthia D Thompson, Sean Spring, Zhenyu Li, Elisabet de los Pinos, Stephen Monks, John T Schiller   This study examined the ability of a papillomavirus-like particle drug-conjugate (AU-011) to eradicate subcutaneous tumors after intravenous injection and to subsequently elicit long-term anti-tumor immunity in the TC-1 syngeneic murine tumor model. Also the combination of AU-011 with immune checkpoint inhibitor antibodies (anti-CTLA-4 or anti-PD-1) was studied and improved therapeutic efficacy. Modulight laser + MLAKIT was used only for Continue reading →

Development of heat shock protein 90-targeted PDT for inflammatory breast cancer

May 17, 2021 by Modulight Content
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Motivation of the study In photodynamic therapy (PDT), systemically administered photosensitizer is activated within the tumor using focused near-infrared light, typically a laser with a wavelength matching the absorption peak of the photosensitizer. Several photosensitizers have been clinically approved for the treatment of different cancers; however, their accumulation is non-tumor exclusive which exposes healthy tissues to side effects like daylight-induced phototoxicity. A promising strategy to improve tumor selectivity is to couple photosensitizer to a tumor-targeting agent that binds to a specific antigen expressed on the Continue reading →Customer case Research by: Duke University, founded in 1924, is one of the leading and wealthiest private research universities in the USA. The most notable Duke alumni is President Richard Nixon. Research at Duke University has been awarded with several Nobel prizes in recent years for groundbreaking discoveries in biochemistry and medicine, such as G-protein coupled receptors, DNA mismatch repair, and cellular regulation of hypoxia. Modulight products: ML8500, ML7710 (665 nm, 689 nm, 750 nm) Laser use: Heat shock protein 90-targeted PDT for breast cancer Continue reading →