Direct Near-infrared Luminescence Detection of Singlet Oxygen Generated by Photodynamic Therapy in Cells In Vitro and Tissues In Vivo¶

2002 ◽  
Vol 75 (4) ◽  
pp. 382-391 ◽  
Author(s):  
Mark Niedre ◽  
Michael S. Patterson ◽  
Brian C. Wilson
Keyword(s):  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Near Infrared ◽  
Luminescence Detection ◽  
Infrared Luminescence ◽  
In Cells

Folic Acid Functionalized Chlorin e6-Superparamagnetic Iron Oxide Nanocarriers as a Theranostic Agent for MRI-Guided Photodynamic Therapy

2021 ◽  
Vol 17 (2) ◽  
pp. 205-215
Author(s):  
Zhenbo Sun ◽  
Mingfang Luo ◽  
Jia Li ◽  
Ailing Wang ◽  
Xucheng Sun ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Folic Acid ◽  
Iron Oxide ◽  
Near Infrared ◽  
Biological Fluids ◽  
Superparamagnetic Iron Oxide ◽  
Chlorin E6 ◽  
Theranostic Agent

Imaging-guided cancer theranostic is a promising strategy for cancer diagnostic and therapeutic. Photodynamic therapy (PDT), as an approved treatment modality, is limited by the poor solubility and dispersion of photosensitizers (PS) in biological fluids. Herein, it is demonstrated that superparamagnetic iron oxide (SPIO)-based nanoparticles (SCFs), prepared by conjugated with Chlorin e6 (Ce6) and modified with folic acid (FA) on the surface, can be used as versatile drug delivery vehicles for effective PDT. The nanoparticles are great carriers for photosensitizer Ce6 with an extremely high loading efficiency. In vitro fluorescence imaging and in vivo magnetic resonance imaging (MRI) results indicated that SCFs selectively accumulated in tumor cells. Under near-infrared laser irradiation, SCFs were confirmed to be capable of inducing low cell viability of RM-1 cells In vitro and displaying efficient tumor ablation with negligible side effects in tumor-bearing mice models.

Extending the excitation wavelength from UV to visible light for a europium complex-based mitochondria targetable luminescent probe for singlet oxygen

2018 ◽  
Vol 47 (37) ◽  
pp. 12852-12857 ◽  
Author(s):  
Hua Ma ◽  
Xin Wang ◽  
Bo Song ◽  
Liu Wang ◽  
Zhixin Tang ◽  
...  
Keyword(s):  
Visible Light ◽  
Singlet Oxygen ◽  
Europium Complex ◽  
Excitation Wavelength ◽  
Luminescent Probe ◽  
Luminescence Detection

A visible-light-excitable Eu3+ complex-based luminescent probe for the time-gated luminescence detection of singlet oxygen in vitro and in vivo.

Discovery of a Monoiodo Aza-BODIPY Near-Infrared Photosensitizer: in vitro and in vivo Evaluation for Photodynamic Therapy

2020 ◽  
Vol 63 (17) ◽  
pp. 9950-9964 ◽  
Author(s):  
Zhiliang Yu ◽  
Junliang Zhou ◽  
Xin Ji ◽  
Guangyu Lin ◽  
Shuang Xu ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Near Infrared ◽  
In Vivo Evaluation

scholarly journals Correlation of in vivo tumor response and singlet oxygen luminescence detection in mTHPC-mediated photodynamic therapy

2015 ◽  
Vol 08 (01) ◽  
pp. 1540006 ◽  
Author(s):  
Brian C. Wilson ◽  
Michael S. Patterson ◽  
Buhong Li ◽  
Mark T. Jarvi
Keyword(s):  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Near Infrared ◽  
Tumor Tissue ◽  
Tumor Response ◽  
Fluorescent Protein ◽  
Normal Skin ◽  
Quantitative Measure ◽  
Clear Correlation

Excited-state singlet oxygen (1 O 2), generated during photodynamic therapy (PDT), is believed to be the primary cytotoxic agent with a number of clinically approved photosensitizers. Its relative concentration in cells or tissues can be measured directly through its near-infrared (NIR) luminescence emission, which has correlated well with in vitro cell and in vivo normal skin treatment responses. Here, its correlation with the response of tumor tissue in vivo is examined, using the photosensitizer meso-tetrahydroxyphenylchlorin (mTHPC) in an animal model comprising luciferase- and green fluorescent protein (GFP)-transduced gliosarcoma grown in a dorsal window chamber. The change in the bioluminescence signal, imaged pretreatment and at 2, 5 and 9 d post treatment, was used as a quantitative measure of the tumor response, which was classified in individual tumors as "non", "moderate" and "strong" in order to reduce the variance in the data. Plotting the bioluminescence-based response vs the 1 O 2 counts demonstrated clear correlation, indicating that 1 O 2 luminescence provides a valid dosimetric technique for PDT in tumor tissue.

A Diode Laser-Based Singlet Oxygen Monitor for Photodynamic Therapy; in- vitro and in- vivo Studies

2006 ◽  
Author(s):  
Seonkyung Lee ◽  
Danthu H. Vu ◽  
Michael F. Hinds ◽  
Steven J. Davis ◽  
Tayyaba Hasan ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Diode Laser ◽  
In Vivo Studies ◽  
Oxygen Monitor

scholarly journals SINGLET OXYGEN DETECTION DURING PHOTOSENSITIZATION

2013 ◽  
Vol 06 (01) ◽  
pp. 1330002 ◽  
Author(s):  
BUHONG LI ◽  
HUIYUN LIN ◽  
DEFU CHEN ◽  
BRIAN C. WILSON ◽  
YING GU
Keyword(s):  
Reactive Oxygen Species ◽  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Direct Methods ◽  
Photochemical Reactions ◽  
Oxygen Species ◽  
Future Trends ◽  
Oxygen Detection

Singlet oxygen (1O2) is a highly reactive oxygen species involved in numerous chemical and photochemical reactions in different biological systems and in particular, in photodynamic therapy (PDT). However, the quantification of 1O2 generation during in vitro and in vivo photosensitization is still technically challenging. To address this problem, indirect and direct methods for 1O2 detection have been intensively studied. This review presents the available methods currently in use or under development for detecting and quantifying 1O2 generation during photosensitization. The advantages and limitations of each method will be presented. Moreover, the future trends in developing PDT- 1O2 dosimetry will be briefly discussed.

scholarly journals NIR Photosensitizer for Two-Photon Fluorescent Imaging and Photodynamic Therapy of Tumor

2021 ◽  
Vol 9 ◽  
Author(s):  
Lujia Chen ◽  
Meijuan Chen ◽  
Yuping Zhou ◽  
Changsheng Ye ◽  
Ruiyuan Liu
Keyword(s):  
Photodynamic Therapy ◽  
Near Infrared ◽  
Fluorescent Imaging ◽  
Deep Tissue ◽  
Two Photon ◽  
Nir Emission ◽  
Good Biocompatibility ◽  
Fluorescent Agent

Preparation of near-infrared (NIR) emissive fluorophore for imaging-guided PDT (photodynamic therapy) has attracted enormous attention. Hence, NIR photosensitizers of two-photon (TP) fluorescent imaging and photodynamic therapy are highly desirable. In this contribution, a novel D-π-A structured NIR photosensitizer (TTRE) is synthesized. TTRE demonstrates near-infrared (NIR) emission, good biocompatibility, and superior photostability, which can act as TP fluorescent agent for clear visualization of cells and vascular in tissue with deep-tissue penetration. The PDT efficacy of TTRE as photosensitizer is exploited in vitro and in vivo. All these results confirm that TTRE would serve as potential platform for TP fluorescence imaging and imaging-guided photodynamic therapy.

scholarly journals Anti-tumor activities of a novel chlorin derivative for photodynamic therapy in vitro and in vivo

2015 ◽  
Vol 08 (01) ◽  
pp. 1540003 ◽  
Author(s):  
Li-Jun Zhang ◽  
Lai-Xing Wang ◽  
Wei-Li Zhang ◽  
Yi-Jia Yan ◽  
Zhi-Long Chen
Keyword(s):  
Photodynamic Therapy ◽  
Quantum Yield ◽  
Singlet Oxygen ◽  
Nude Mice ◽  
Absorption Peak ◽  
Long Wavelength ◽  
Wavelength Absorption ◽  
Chlorin Derivative

In this study, a novel photosensitizer meso-tetra (3-pyrrolidinomethyl-4-methoxyphenyl) chlorin (TPMC) was reported. It displays a characteristic long wavelength absorption peak at 656 nm and it shows a singlet oxygen quantum yield of 0.48. After light irradiation with 650 nm laser, it can kill Eca-109 and SMMC-7721 cells in vitro (25 mW/cm2, 1.2 to 3.6 J/cm2) and destroy Eca-109 tumor in nude mice (50 mW/cm2, 90 J/cm2). It has the perspective to be developed as a new anti-tumor drug in photodynamic therapy (PDT) photodiagnosis, and deserves further investigation.

scholarly journals Heterometallic Ru–Pt metallacycle for two-photon photodynamic therapy

2018 ◽  
Vol 115 (22) ◽  
pp. 5664-5669 ◽  
Author(s):  
Zhixuan Zhou ◽  
Jiangping Liu ◽  
Thomas W. Rees ◽  
Heng Wang ◽  
Xiaopeng Li ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Near Infrared ◽  
Photon Absorption ◽  
In Vivo Studies ◽  
Target Tissue ◽  
Noninvasive Treatment ◽  
Two Photon Absorption ◽  
Two Photon

As an effective and noninvasive treatment of various diseases, photodynamic therapy (PTD) relies on the combination of light, a photosensitizer, and oxygen to generate cytotoxic reactive oxygen species that can damage malignant tissue. Much attention has been paid to covalent modifications of the photosensitizers to improve their photophysical properties and to optimize the pathway of the photosensitizers interacting with cells within the target tissue. Herein we report the design and synthesis of a supramolecular heterometallic Ru–Pt metallacycle via coordination-driven self-assembly. While inheriting the excellent photostability and two-photon absorption characteristics of the Ru(II) polypyridyl precursor, the metallacycle also exhibits red-shifted luminescence to the near-infrared region, a larger two-photon absorption cross-section, and higher singlet oxygen generation efficiency, making it an excellent candidate as a photosensitizer for PTD. Cellular studies reveal that the metallacycle selectively accumulates in mitochondria and nuclei upon internalization. As a result, singlet oxygen generated by photoexcitation of the metallacycle can efficiently trigger cell death via the simultaneous damage to mitochondrial function and intranuclear DNA. In vivo studies on tumor-bearing mice show that the metallacycle can efficiently inhibit tumor growth under a low light dose with minimal side effects. The supramolecular approach presented in this work provides a paradigm for the development of PDT agents with high efficacy.

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