PDT uses photoactivated nanophotosensitizers to generate ROS and eliminate hyperplastic synovium. The abstract emphasizes spatial and temporal control of this effect.
First-pass extracted concept
photodynamic therapy
Candidate: concept label11 source documents26 linked claims
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Aliases
PDT
Extracted Explainers
What the tool is doing
Photodynamic therapy is described as a phototherapy modality that can be synergistically integrated with oncolytic viruses.
Photodynamic therapy is named as one therapeutic area in which nanoparticles can function as therapeutic agents.
Photodynamic therapy combines a tumor-localizing photosensitizer with light activation to trigger photochemical and photobiologic processes that irreversibly damage tumor tissue.
Resources required
This approach requires nanophotosensitizers and photoactivation.
Its use implies a light-based treatment setup, and the abstract highlights light penetration as a practical constraint.
It requires administration of a photosensitizing agent, which can in some cases require metabolic synthesis from a prodrug, plus light of a specific wavelength. The abstract also notes technical issues in light dosimetry.
What problem it solves
It is described as a precise way to target diseased synovial tissue in RA.
In combination with OVs, it is described as helping improve delivery, tumor destruction, and antitumor immune responses.
The abstract places it within cancer therapy applications of nanoparticles.
The review presents PDT as a treatment approach for some cancers by producing localized photodamage in tumor tissues.
What it does not solve
The abstract indicates that translation is still limited by light penetration, delivery efficiency, and safety concerns.
The abstract does not claim universal efficacy across cancers and indicates dependence on sensitizer localization and appropriate light delivery.
Evidence Snippets
PDT relies on photoactivated nanophotosensitizers to precisely eliminate hyperplastic synovium through spatiotemporally controlled reactive oxygen species (ROS) production.
Non-invasive phototherapies, including photobiomodulation therapy (PBMT), photodynamic therapy (PDT), and photothermal therapy (PTT), have emerged as promising alternatives.
synergistic multimodal therapies, including chemodynamic therapy, sonodynamic therapy, photothermal therapy, immunotherapy, photodynamic therapy, and gas therapy
This review provides the first comprehensive analysis of synergistic integration of OVs with both photodynamic therapy (PDT) and photothermal therapy (PTT).
The supplied summary states that the review emphasizes photodynamic activation and identifies photodynamic therapy as the dominant mechanistic context.
The review scope and supplied summary explicitly include photodynamic therapy as a contrasted phototherapeutic modality.
Photodynamic therapy (PDT) is an anti-tumor treatment ... involves the activation of a photosensitizer (PS) using light of a specific wavelength, which also generates singlet oxygen and other reactive oxygen species (ROS) that cause tumor cell death.
This review article will discuss how nanoparticles are able to function as therapeutic agents in photodynamic, gene, and thermal therapy.
possible application of phenothiazine derivatives as new photosensitizers for their therapeutic application in photodynamic therapy (PDT)
Photodynamic therapy (PDT) has been known for over a hundred years, but is only now becoming widely used.
Photodynamic therapy involves administration of a tumor-localizing photosensitizing agent, which may require metabolic synthesis (i.e., a prodrug), followed by activation of the agent by light of a specific wavelength.
Supporting Sources
Linked Claims
Photodynamic therapy uses photoactivated nanophotosensitizers to eliminate hyperplastic synovium through spatiotemporally controlled ROS production.
Quoted textsource-backed
PDT relies on photoactivated nanophotosensitizers to precisely eliminate hyperplastic synovium through spatiotemporally controlled reactive oxygen species (ROS) production.
Phototherapy used in conjunction with oncolytic viruses can enhance viral delivery, amplify tumor destruction, and boost antitumor immune responses.
Quoted textsource-backed
Phototherapy, an innovative and rapidly advancing cancer treatment technology, can mitigate these limitations when used in conjunction with OVs, enhancing viral delivery, amplifying tumor destruction, and boosting antitumor immune responses.
Combined OV-phototherapy strategies are promising in preclinical models but remain largely in early-stage research.
Quoted textsource-backed
While promising in preclinical models, these combined strategies are still largely in early-stage research.
Photodynamic therapy induces adipocyte apoptosis and tissue remodeling via reactive oxygen species generated by photosensitizers.
The review analyzes synergistic integration of oncolytic viruses with photodynamic therapy and photothermal therapy.
Quoted textsource-backed
This review provides the first comprehensive analysis of synergistic integration of OVs with both photodynamic therapy (PDT) and photothermal therapy (PTT).
Micro/nano-motors are described as advantageous for synergistic multimodal tumor therapies including chemodynamic, sonodynamic, photothermal, immunotherapy, photodynamic, and gas therapy.
Quoted textsource-backed
we discuss the therapeutic mechanisms of MNMs within the tumor microenvironment in detail and highlight the advantages of synergistic multimodal therapies, including chemodynamic therapy, sonodynamic therapy, photothermal therapy, immunotherapy, photodynamic therapy, and gas therapy.
Non-invasive phototherapy shows strong potential for obesity management and may enable safer and more efficient fat reduction.
Clinical translation of combined OV-phototherapy strategies is limited by light penetration, delivery efficiency, and safety concerns.
Quoted textsource-backed
Challenges such as limited light penetration, delivery efficiency, and safety concerns remain to be addressed for clinical translation.
The review emphasizes photodynamic and photothermal activation as key mechanisms in photosensitive lipid-based drug delivery.
The review context distinguishes photoactivated chemotherapy from photodynamic therapy as separate phototherapeutic modalities.
Heat shock protein expression is part of the protective cellular response to photodynamic therapy.
Quoted textsource-backed
Several mechanisms are involved in the protective responses to PDT including the expression of chaperone/heat shock proteins (HSPs).
Photodynamic therapy uses light-activated photosensitizers to generate singlet oxygen and other reactive oxygen species that cause tumor cell death.
Quoted textsource-backed
Photodynamic therapy (PDT) ... involves the activation of a photosensitizer (PS) using light of a specific wavelength, which also generates singlet oxygen and other reactive oxygen species (ROS) that cause tumor cell death.
The review discusses how certain photodynamic therapy protocols may optimally stimulate the immune system through heat shock proteins.
Quoted textsource-backed
We will also discuss how certain PDT protocols optimally stimulate the immune system through HSPs.
Nanoparticles are discussed as therapeutic agents in photodynamic therapy, gene therapy, and thermal therapy for cancer.
Quoted textsource-backed
how they can function as therapeutic agents in photodynamic, gene, and thermal therapy
Phenothiazine derivatives are discussed as possible new photosensitizers for photodynamic therapy and for light inactivation of viruses and bacteria.
Different photosensitizers can have very different pharmacokinetics, which can directly affect illumination parameters.
Quoted textsource-backed
Different PS can have very different pharmacokinetics and this can directly affect the illumination parameters.
Photodynamic therapy anti-tumor effects are divided into three main mechanisms: anti-vascular effects, direct tumor cell death, and inflammation-associated immune activation.
Quoted textsource-backed
The anti-tumor effects of PDT are divided into three main mechanisms.
Photodynamic therapy can cause anti-vascular effects leading to thrombosis and hemorrhage in tumor blood vessels, causing tumor death through oxygen and nutrient deprivation.
Quoted textsource-backed
Powerful anti-vascular effects can lead to thrombosis and hemorrhage in tumor blood vessels that subsequently lead to tumor death via deprivation of oxygen and nutrients.
Photodynamic therapy can directly kill tumor cells by apoptosis or necrosis if the photosensitizer has been taken up by tumor cells.
Quoted textsource-backed
Direct tumor cell death by apoptosis or necrosis can occur if the PS has been allowed to be taken up by tumor cells.
Photodynamic therapy can induce acute inflammation, cytokine release, and stress response proteins that recruit leukocytes and contribute to local and distant anti-tumor immune destruction.
Quoted textsource-backed
Finally the acute inflammation and release of cytokines and stress response proteins induced in the tumor by PDT can lead to an influx of leukocytes that can both contribute to tumor destruction as well as to stimulate the immune system to recognize and destroy tumor cells even at distant locations.
The effect of photodynamic therapy on tumors depends on the stage of photosensitizer localization at which light is delivered.
Quoted textsource-backed
The effect of PDT on the tumor largely depends at which stage of this continuous process light is delivered.
Preclinical and clinical studies over a 25-year period established photodynamic therapy as a useful treatment approach for some cancers.
Photodynamic therapy consists of administering a tumor-localizing photosensitizing agent, sometimes generated through prodrug metabolism, followed by activation with light of a specific wavelength.
Photodynamic therapy triggers a sequence of photochemical and photobiologic processes that cause irreversible photodamage to tumor tissues.
Since 1993, Photofrin-based photodynamic therapy had obtained regulatory approval in multiple countries for early and advanced stage cancers of the lung, digestive tract, and genitourinary tract.
The review discusses mechanisms of subcellular and tumor localization of photosensitizing agents, molecular and cellular tumor responses to photodynamic therapy, and technical issues in light dosimetry.