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Updated: May 17, 2026

An In-House-Built and Light-Emitting-Diode-Based Photodynamic Therapy Device for Enhancing Verteporfin Cytotoxicity in a 2D Cell Culture Model
Published on: January 13, 2023
Using cellular mechanisms to develop effective combinations of photodynamic therapy and targeted therapies
1Wellman Center for Photomedicine, Harvard Medical School, Massachusetts General Hospital, Boston, MA 02114, USA. thasan@partners.org
Abstract:
The bond between the research laboratory and the clinic is especially strong in the field of photomedicine. Much is learned in preclinical animal models, which is translated to the clinic for investigation, and then refinements in theory and technique are explored back in the laboratory. With many cancers becoming resistant to treatment, photodynamic therapy (PDT) offers a mechanistically distinct alternative. Studies have shown that PDT not only mitigates chemoresistance but also synergizes with chemotherapy and molecularly targeted therapies. From the world of biochemistry comes this unique look at 2 approaches to maximize the photodynamic effect through PDT combinations with targeted therapies: 1) using the molecular response after PDT to guide the selection of targeted agents and 2) preconditioning cancer cells to modulate nuclear molecular targets before PDT.
Insights
Photodynamic therapy (PDT) offers a novel cancer treatment. This study explores combining PDT with targeted therapies by either guiding treatment by the molecular response after PDT or preconditioning cells before PDT.
Area of Science:
- Biochemistry
- Photomedicine
- Oncology
Background:
- The synergy between laboratory research and clinical application is crucial in photomedicine.
- Cancer treatment resistance necessitates exploring alternative therapeutic strategies like photodynamic therapy (PDT).
- PDT demonstrates potential in overcoming chemoresistance and synergizing with existing cancer treatments.
Purpose of the Study:
- To investigate two novel approaches for enhancing the efficacy of photodynamic therapy (PDT) when combined with targeted therapies.
- To explore strategies for maximizing the photodynamic effect in cancer treatment.
Main Methods:
- Investigating the use of post-PDT molecular responses to inform the selection of targeted agents.
- Examining the preconditioning of cancer cells to modulate nuclear molecular targets prior to PDT administration.
Main Results:
- The study presents two distinct biochemical strategies to optimize PDT outcomes.
- These strategies aim to improve cancer cell response to combined therapies.
Conclusions:
- Combining PDT with targeted therapies holds significant promise for cancer treatment.
- Tailoring targeted agent selection based on PDT response or preconditioning cells offers innovative avenues for maximizing therapeutic effects.
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