A Review of Light Sources and Enhanced Targeting for Photodynamic Therapy.

2021 ◽  
Vol 28 ◽  
Author(s):  
Menghua Xiang ◽  
Quanming Zhou ◽  
Zihan Shi ◽  
Xuan Wang ◽  
Mengchu Li ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Clinical Applications ◽  
Light Sources ◽  
Oxygen Species ◽  
Future Perspectives ◽  
Local Irradiation ◽  
Advantages And Disadvantages ◽  
The Past ◽  
In Situ Generation

: Photodynamic Therapy (PDT), as a clinically approved modality for the treatment of various disordered diseases including cancer, has received great advances in recent years. By preferentially accumulating non-toxic Photosensitizers (PSs) in the pathological area, and in situ generation of cytotoxic reactive oxygen species (ROS) under local irradiation by a light source with appropriate wavelength, PDT works in a dual-selective manner. Over the past decades, numerous studies and reviews on PDT mainly focused on activable PSs and the newly emerging PSs in PDT. However, to the best of our knowledge, there are few articles on the systematic introduction of light sources and limited reports about targeted strategies in PDT. This review comprehensively summarizes various light sources applied in PDT together with typical enhanced targeting strategies, and outlines their advantages and disadvantages, respectively. The clinical applications and future perspectives in light sources are also partly presented and discussed.

scholarly journals Photodynamic Therapy Using Cerenkov and Radioluminescence Light

2021 ◽  
Vol 9 ◽  
Author(s):  
Antonello E. Spinelli ◽  
Federico Boschi
Keyword(s):  
Photodynamic Therapy ◽  
Short Review ◽  
External Source ◽  
Light Sources ◽  
Oxygen Species ◽  
Light Penetration ◽  
The Past ◽  
Light Fluence ◽  
Internal Sources ◽  
Potential Use

In this short review the potential use of Cerenkov radiation and radioluminescence as internal sources for Photodynamic therapy (PDT) is discussed. PDT has been developed over the course of more than 100 years and is based on the induced photo conversion of a drug called photosensitizer (PS) that triggers the production of cytotoxic reactive oxygen species (ROS) leading to the killing of the cells. In order to overcome the problem of light penetration in the tissues, different solutions were proposed in the past. The use of radioisotopes like: 18F, 64Cu, 90Y, 177Lu as internal light sources increase the light fluence at the PS compared to an external source, resulting in a larger cytotoxic effect.

scholarly journals Application of Porphyrins in Antibacterial Photodynamic Therapy

Molecules ◽  
2019 ◽  
Vol 24 (13) ◽  
pp. 2456 ◽  
Author(s):  
Bamidele Amos-Tautua ◽  
Sandile Songca ◽  
Oluwatobi Oluwafemi
Keyword(s):  
Photodynamic Therapy ◽  
Bacterial Infections ◽  
Therapeutic Strategy ◽  
Bacterial Resistance ◽  
Public Health Problem ◽  
Clinical Applications ◽  
Future Perspectives ◽  
The Past ◽  
Methods Of Synthesis ◽  
Inactivation Of Bacteria

Antibiotics are commonly used to control, treat, or prevent bacterial infections, however bacterial resistance to all known classes of traditional antibiotics has greatly increased in the past years especially in hospitals rendering certain therapies ineffective. To limit this emerging public health problem, there is a need to develop non-incursive, non-toxic, and new antimicrobial techniques that act more effectively and quicker than the current antibiotics. One of these effective techniques is antibacterial photodynamic therapy (aPDT). This review focuses on the application of porphyrins in the photo-inactivation of bacteria. Mechanisms of bacterial resistance and some of the current ‘greener’ methods of synthesis of meso-phenyl porphyrins are discussed. In addition, significance and limitations of aPDT are also discussed. Furthermore, we also elaborate on the current clinical applications and the future perspectives and directions of this non-antibiotic therapeutic strategy in combating infectious diseases.

scholarly journals A residue-free approach to water disinfection using catalytic in situ generation of reactive oxygen species

2021 ◽  
Author(s):  
Thomas Richards ◽  
Jonathan H. Harrhy ◽  
Richard J. Lewis ◽  
Alexander G. R. Howe ◽  
Grzegorz M. Suldecki ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Reactive Oxygen ◽  
Water Disinfection ◽  
Oxygen Species ◽  
In Situ Generation

scholarly journals The trends of uveal melanoma research in the past two decades and future perspectives.

2021 ◽  
Author(s):  
Khaled Ali Elubous ◽  
Ali Daoud Alebous ◽  
Hebah Ali Abous ◽  
Rawan Ali Elubous
Keyword(s):  
Uveal Melanoma ◽  
Web Of Science ◽  
The United States ◽  
Future Research ◽  
Genetic Mutations ◽  
Future Perspectives ◽  
Molecular Alterations ◽  
The Past ◽  
Clinical Biomarkers

Abstract PURPOSE Evaluation of the research trends in uveal melanoma in the past two decades.METHODS Data were extracted from the Web of Science database website. VOSviewer and Citespace software were used to analyze the retrieved data. RESULTS The leading country in terms of output and international collaboration is the United States. Research interest in genetic mutations, molecular pathways, and immunotherapy was remarkable in recent years. Most of the top ten journals are specialized in ophthalmology. In recent years the hotspots include future perspectives, BAB1 mutation, therapeutic target, and systematic reviews. The keywords with the strongest citation bursts are immunotherapy, outcome, and in situ hybridization. CONCLUSION The output of uveal melanoma research increased during the past two decades. Future research foci may include exploring different mutations role, immunotherapy, molecular alterations, and finding ideal clinical biomarkers.

scholarly journals 3D In Vitro Human Organ Mimicry Devices for Drug Discovery, Development, and Assessment

2020 ◽  
Vol 2020 ◽  
pp. 1-41
Author(s):  
Aida Rodriguez-Garcia ◽  
Jacqueline Oliva-Ramirez ◽  
Claudia Bautista-Flores ◽  
Samira Hosseini
Keyword(s):  
Drug Discovery ◽  
Essential Role ◽  
Future Perspectives ◽  
Human Organ ◽  
Comprehensive Review ◽  
Advantages And Disadvantages ◽  
The Past ◽  
Animal Trials ◽  
On Chip

The past few decades have shown significant advancement as complex in vitro humanized systems have substituted animal trials and 2D in vitro studies. 3D humanized platforms mimic the organs of interest with their stimulations (physical, electrical, chemical, and mechanical). Organ-on-chip devices, including in vitro modelling of 3D organoids, 3D microfabrication, and 3D bioprinted platforms, play an essential role in drug discovery, testing, and assessment. In this article, a thorough review is provided of the latest advancements in the area of organ-on-chip devices targeting liver, kidney, lung, gut, heart, skin, and brain mimicry devices for drug discovery, development, and/or assessment. The current strategies, fabrication methods, and the specific application of each device, as well as the advantages and disadvantages, are presented for each reported platform. This comprehensive review also provides some insights on the challenges and future perspectives for the further advancement of each organ-on-chip device.

Photodynamic Therapy: Porphyrins and Phthalocyanines as Photosensitizers

2008 ◽  
Vol 61 (10) ◽  
pp. 741 ◽  
Author(s):  
Leonardo Marmo Moreira ◽  
Fábio Vieira dos Santos ◽  
Juliana Pereira Lyon ◽  
Maira Maftoum-Costa ◽  
Cristina Pacheco-Soares ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Photodynamic Therapy ◽  
Reactive Oxygen ◽  
Spectroscopic Properties ◽  
Therapeutic Window ◽  
Biological Macromolecules ◽  
Light Sources ◽  
Oxygen Species ◽  
Species Formation ◽  
Aqueous Solvent

The present work is focussed on the principles of photodynamic therapy (PDT), emphasizing the photochemical mechanisms of reactive oxygen species formation and the consequent biochemical processes generated by the action of reactive oxygen species on various biological macromolecules and organelles. This paper also presents some of the most used photosensitizers, including Photofrin, and the new prototypes of photosensitizers, analysing their physicochemical and spectroscopic properties. At this point, the review discusses the therapeutic window of absorption of specific wavelengths involving first- and second-generation photosensitizers, as well as the principal light sources used in PDT. Additionally, the aggregation process, which consists in a phenomenon common to several photosensitizers, is studied. J-aggregates and H-aggregates are discussed, along with their spectroscopic effects. Most photosensitizers have a significant hydrophobic character; thus, the study of the types of aggregation in aqueous solvent is very relevant. Important aspects of the coordination chemistry of metalloporphyrins and metallophthalocyanines used as photosensitizers are also discussed. The state-of-the-art in PDT is evaluated, discussing recent articles in this area. Furthermore, macrocyclic photosensitizers, such as porphyrins and phthalocyanines, are specifically described. The present review is an important contribution, because PDT is one of the most auspicious advances in the therapy against cancer and other non-malignant diseases.

scholarly journals Inorganic Nanoparticles for Cancer Treatment

2020 ◽  
Author(s):  
Heidi Abrahamse ◽  
Hanieh Montaseri ◽  
Cherie Kruger
Keyword(s):  
Photodynamic Therapy ◽  
Cancer Treatment ◽  
Photothermal Therapy ◽  
Reactive Oxygen ◽  
Inorganic Nanoparticles ◽  
Future Perspectives ◽  
The Past ◽  
Photosensitizing Agents

The application of porphyrins and their derivatives have been investigated extensively over the past years for phototherapy cancer treatment. Phototherapeutic Porphyrins have the ability to generate high levels of reactive oxygen with a low dark toxicity and these properties have made them robust photosensitizing agents. In recent years, Porphyrins have been combined with various nanomaterials in order to improve their bio-distribution. These combinations allow for nanoparticles to enhance photodynamic therapy (PDT) cancer treatment and adding additional nanotheranostics (photothermal therapy—PTT) as well as enhance photodiagnosis (PDD) to the reaction. This review examines various porphyrin-based inorganic nanoparticles developed for phototherapy nanotheranostic cancer treatment over the last three years (2017 to 2020). Furthermore, current challenges in the development and future perspectives of porphyrin-based nanomedicines for cancer treatment are also highlighted.

scholarly journals Recent Advances in Porphyrin-Based Inorganic Nanoparticles for Cancer Treatment

2020 ◽  
Vol 21 (9) ◽  
pp. 3358 ◽  
Author(s):  
Hanieh Montaseri ◽  
Cherie Ann Kruger ◽  
Heidi Abrahamse
Keyword(s):  
Photodynamic Therapy ◽  
Cancer Treatment ◽  
Photothermal Therapy ◽  
Reactive Oxygen ◽  
Inorganic Nanoparticles ◽  
Future Perspectives ◽  
The Past ◽  
Recent Advances ◽  
Photosensitizing Agents

The application of porphyrins and their derivatives have been investigated extensively over the past years for phototherapy cancer treatment. Phototherapeutic Porphyrins have the ability to generate high levels of reactive oxygen with a low dark toxicity and these properties have made them robust photosensitizing agents. In recent years, Porphyrins have been combined with various nanomaterials in order to improve their bio-distribution. These combinations allow for nanoparticles to enhance photodynamic therapy (PDT) cancer treatment and adding additional nanotheranostics (photothermal therapy—PTT) as well as enhance photodiagnosis (PDD) to the reaction. This review examines various porphyrin-based inorganic nanoparticles developed for phototherapy nanotheranostic cancer treatment over the last three years (2017 to 2020). Furthermore, current challenges in the development and future perspectives of porphyrin-based nanomedicines for cancer treatment are also highlighted.

Intratumoral Photosensitizer Delivery and Photodynamic Therapy

Nano LIFE ◽  
2021 ◽  
Vol 11 (02) ◽  
pp. 2130003
Author(s):  
Chen-Hua Ma ◽  
Jeffrey Yang ◽  
Jenna L. Mueller ◽  
Huang-Chiao Huang
Keyword(s):  
Photodynamic Therapy ◽  
Low Income ◽  
Low Cost ◽  
Clinical Applications ◽  
The Body ◽  
Light Sources ◽  
Short Article ◽  
Middle Income ◽  
Administration Routes ◽  
Step Procedure

Photodynamic therapy (PDT) is a two-step procedure that involves the administration of special drugs, commonly called photosensitizers, followed by the application of certain wavelengths of light. The light activates these photosensitizers to produce reactive molecular species that induce cell death in tissues. There are numerous factors to consider when selecting the appropriate photosensitizer administration route, such as which part of the body is being targeted, the pharmacokinetics of photosensitizers, and the formulation of photosensitizers. While intravenous, topical, and oral administration of photosensitizers are widely used in preclinical and clinical applications of PDT, other administration routes, such as intraperitoneal, intra-arterial, and intratumoral injections, are gaining traction for their potential in treating advanced diseases and reducing off-target toxicities. With recent advances in targeted nanotechnology, biomaterials, and light delivery systems, the exciting possibilities of targeted photosensitizer delivery can be fully realized for preclinical and clinical applications. Further, in light of the growing burden of cancer mortality in low- and middle-income countries and development of low-cost light sources and photosensitizers, PDT could be used to treat cancer patients in low-income settings. This short article introduces aspects of interfaces of intratumoral photosensitizer injections and nano-biomaterials for PDT applications in both high-income and low-income settings but does not present a comprehensive review due to space limitations.

Sign in / Sign up

Export Citation Format

Share Document