Use of photodynamic therapy and photobiomodulation as alternatives for microbial control on clinical and subclinical mastitis in sheep

2022 ◽  
Author(s):  
Lara Oliveira Silva ◽  
Kedma Lorena da Silva Souza ◽  
Larissa de Jesus Beloti ◽  
Waldemar Mota Ramos Neto ◽  
Silvia Cristina Núñez ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Microbial Control ◽  
Subclinical Mastitis

scholarly journals PHOTODYNAMIC POTENTIAL OF XANTHENIC PHOTOSENSITIZERS ABOUT A STANDARD STRAIN OF PSEUDOMONES AERUGINOSA

2021 ◽  
pp. 17
Author(s):  
Keyword(s):  
Photodynamic Therapy ◽  
Light Source ◽  
Bacterial Resistance ◽  
Microbial Control ◽  
High Capacity ◽  
Punica Granatum ◽  
Hospital Environment ◽  
Alternative Methods ◽  
Light Sources ◽  
Xanthene Dyes

Introduction: Microbial control has proven to be an increasingly difficult obstacle to be controlled, making it a constant research focus. Researchers seek new alternative methods guaranteeing treatment without the use of antimicrobials or associating them, since its used has being neglected, causing an increase in the resistance of microorganisms, making it even more difficult to choose a treatment. The microorganism under study was Pseudomonas aeruginosa, a gram-negative, highly virulent bacterium found in the community and in a hospital environment, with difficult control due to its high capacity for antibiotic resistance, favored by the incorrect use of antibiotic therapies. Photodynamic Therapy consists of the use of a dye associated with the irradiation of a light on the microorganism, promotes dye-light-bacteria interaction, so that it can be inhibited or have its capacity for proliferation reduced. Objective: This research aimed to present an alternative method to its treatment through the use of xanthene dyes and a photosensitizer in a way that would sensitize the bacteria. Plants of the Baixada Maranhese (Punica granatum and Terminalia cattapa) and an LED light source that was irradiated for 40 seconds. The combinations between dye, plant extracts and elimination were organized into 7 groups. Results: The two most successful groups had combinations with the dye Rosa-bengal and in the presence of light, their bactericidal potential was strengthened. In the group in which Punica granatum extract was used alone, there was bacterial proliferation in the absence of the light source; in its presence, the reduction of colonies was not aesthetically relevant. Conclusion: Photodynamic Therapy presents itself as a new resource, acting independently of antibiotic therapy, avoiding and, concomitantly, reducing bacterial resistance. Thus, it appears as a viable alternative in the treatment of patients with “diabetic foot”, considering its possible application with different types of photosensitizers or even in combination with traditional drugs, in addition to the use of several light sources with lengths of different waveforms for the treatment of infections in epithelium and mucous membranes.

scholarly journals Photosensitization With Supramolecular Arrays for Enhanced Antimicrobial Photodynamic Treatments

2021 ◽  
Vol 9 ◽  
Author(s):  
Cecilia Vera ◽  
Fiorella Tulli ◽  
Claudio D. Borsarelli
Keyword(s):  
Photodynamic Therapy ◽  
Infectious Diseases ◽  
Supramolecular Chemistry ◽  
Recent Literature ◽  
Control Strategies ◽  
Microbial Control ◽  
Antimicrobial Photodynamic Therapy ◽  
Exciting Field ◽  
Microbial Infections ◽  
Multiple Drugs

Microbial infections represent a silent threat to health that has worsened in recent decades due to microbial resistance to multiple drugs, preventing the fight against infectious diseases. Therefore, the current postantibiotic era forces the search for new microbial control strategies. In this regard, antimicrobial photodynamic therapy (aPDT) using supramolecular arrays with photosensitizing capabilities showed successful emerging applications. This exciting field makes it possible to combine applied aspects of molecular photochemistry and supramolecular chemistry, together with the development of nano- and biomaterials for the design of multifunctional or “smart” supramolecular photosensitizers (SPS). This minireview aims to collect the concepts of the photosensitization process and supramolecular chemistry applied to the development of efficient applications of aPDT, with a brief discussion of the most recent literature in the field.

scholarly journals Use of photodynamic therapy in the treatment of bovine subclinical mastitis

2018 ◽  
Vol 21 ◽  
pp. 246-251 ◽  
Author(s):  
Lívia Helena Moreira ◽  
José Carlos Pereira de Souza ◽  
Carlos José de Lima ◽  
Miguel Angel Castillo Salgado ◽  
Adriana Barrinha Fernandes ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Subclinical Mastitis

Construction of a near-infrared responsive upconversion nanoplatform against hypoxic tumors via NO-enhanced photodynamic therapy

Nanoscale ◽  
2020 ◽  
Vol 12 (14) ◽  
pp. 7875-7887 ◽  
Author(s):  
Ying Lan ◽  
Xiaohui Zhu ◽  
Ming Tang ◽  
Yihan Wu ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Near Infrared ◽  
Upconversion Nanoparticles

A near-infrared (NIR) activated theranostic nanoplatform based on upconversion nanoparticles (UCNPs) is developed in order to overcome the hypoxia-associated resistance in photodynamic therapy by photo-release of NO upon NIR illumination.

Porphyrin-functionalized coordination star polymers and their potential applications in photodynamic therapy

2019 ◽  
Vol 10 (45) ◽  
pp. 6116-6121 ◽  
Author(s):  
Tan Ji ◽  
Lei Xia ◽  
Wei Zheng ◽  
Guang-Qiang Yin ◽  
Tao Yue ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Self Assembly ◽  
Star Polymers ◽  
New Family ◽  
Potential Applications

We present a new family of porphyrin-functionalized coordination star polymers prepared through combination of coordination-driven self-assembly and post-assembly polymerization. Their self-assembly behaviour in water and potential for photodynamic therapy were demonstrated.

A nitroreductase-activatable near-infrared theranostic photosensitizer for photodynamic therapy under mild hypoxia

2020 ◽  
Vol 56 (43) ◽  
pp. 5819-5822
Author(s):  
Jing Zheng ◽  
Yongzhuo Liu ◽  
Fengling Song ◽  
Long Jiao ◽  
Yingnan Wu ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Triplet State ◽  
Near Infrared ◽  
Mild Hypoxia

In this study, a near-infrared (NIR) theranostic photosensitizer was developed based on a heptamethine aminocyanine dye with a long-lived triplet state.

Dinuclear phosphorescent rhenium(i) complexes as potential anticancer and photodynamic therapy agents

2020 ◽  
Vol 49 (33) ◽  
pp. 11583-11590 ◽  
Author(s):  
Zheng-Yin Pan ◽  
Dai-Hong Cai ◽  
Liang He
Keyword(s):  
Photodynamic Therapy ◽  
Cell Apoptosis ◽  
Lysosomal Dysfunction ◽  
Intracellular Ros

Two dinuclear organometallic Re(i) complexes increase intracellular ROS levels, causing lysosomal dysfunction and cell apoptosis.

Involvement of CFTR in photodynamic therapy-mediated apoptosis

2010 ◽  
Vol 34 (8) ◽  
pp. S44-S44
Author(s):  
Juan Juan Chen ◽  
Xiao Hua Jiang ◽  
Hsiao Chang Chan
Keyword(s):  
Photodynamic Therapy

Apoptosis is induced by caspase activation and cytochrome c release in photodynamic therapy (PDT) of human hepatoteilular carcinoma cells

2001 ◽  
Vol 120 (5) ◽  
pp. A363-A363
Author(s):  
A OKUMURA ◽  
M HAMBLIN ◽  
T HASAN ◽  
T ISHIKAWA ◽  
S KAKUMU ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Cytochrome C ◽  
Carcinoma Cells ◽  
Caspase Activation ◽  
Cytochrome C Release
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