Results 31 to 40 of about 3,607 (204)

Photophysical Properties of Pheophorbide-a Derivatives and Their Photodynamic Therapeutic Effects on a Tumor Cell Line In Vitro [PDF]

open access: yesInternational Journal of Photoenergy, 2014
Pheophorbide-a derivatives have been reported to be potential photosensitizers for photodynamic therapy (PDT). In this study, photophysics of pheophorbide-a derivatives (PaDs) were investigated along with their photodynamic tumoricidal effect in vitro ...
Kang-Kyun Wang   +9 more
doaj   +4 more sources

Effect of Slightly Acidic Electrolyzed Water on Chlorophyll Degradation in Postharvest Broccoli [PDF]

open access: yesShipin Kexue, 2023
To explore the effect of slightly acidic electrolyzed water (SAEW) on chlorophyll degradation in postharvest broccoli, the pattern of changes in the color, total chlorophyll content, chlorophyll derivative content, chlorophyll degrading enzyme activities,
HAN Ying, SUN Ying, GUO Feng, WANG Xinyu, ZHAO Anqi, WU Zhaoxia, LI Pengxia, LI Guofeng, HU Huali
doaj   +1 more source

Phototoxicity of Pheophorbide A Extracted from Gracilaria Lemaneiformis on Six Kinds of Cancer Cells

open access: yesZhongliu Fangzhi Yanjiu, 2022
Objective To investigate the photodynamic antitumor activity and chemical characteristics of pheophorbide A (PPBa)in vitro. Methods Breast cancer cells (MCF-7), lung cancer cells (A549), cervical cancer cells (HeLa), and three kinds of hepatoma cells ...
HUANG Xixiang   +5 more
doaj   +1 more source

Pheophorbide a may regulate Jasmonate signaling during dark-induced senescence [PDF]

open access: yes, 2020
Chlorophyll degradation is one of the most visible signs of leaf senescence. During senescence, chlorophyll is degraded in the multistep pheophorbide a oxygenase (PAO)/phyllobilin pathway.
Pružinská, Adriana   +8 more
core   +1 more source

Mechanism of photodynamic activity of pheophorbides

open access: yesJournal of Biomedical Optics, 2001
Plasmid DNA is efficiently photocleaved by sodium pheophorbides (Na-Phdes) a and b in the absence of oxygen as well as in the presence of oxygen. Fluorescence microscopic observation shows a rapid incorporation of Na-Phde a into nuclei, mitochondria, and lysosome of human oral mucosa cells.
C, Tanielian, M, Kobayashi, C, Wolff
openaire   +2 more sources

Effect of Blue Light-Emitting Diode (LED) Irradiation on Chlorophyll Metabolism in Ethylene-Degreened Early-Season Satsuma Mandarin Fruit [PDF]

open access: yesShipin Kexue, 2023
Early-season Satsuma mandarin fruit produced in Chongqing are usually harvested when the flesh reaches the acceptable internal maturity standards, while the peel is still green. In order to solve this problem, ethylene degreening treatment is widely used
CAO Tingting, ZENG Kaifang, DENG Lili
doaj   +1 more source

Two New Phloroglucinol Derivatives and Five Photosensitizing Pheophorbides from Leaves (Salam)

open access: yesNatural Product Communications, 2012
Two new phloroglucinol derivatives, identified as anthuminoate ( 1 ) and anthuminone ( 2 ), were isolated from the ichthyotoxic ethyl acetate fraction of Syzygium polyanthum leaves.
Lee Wei Har   +4 more
doaj   +1 more source

Pheophorbide a Is a Specific Probe for ABCG2 Function and Inhibition [PDF]

open access: yesCancer Research, 2004
Abstract Pheophorbide a (PhA), a chlorophyll catabolite, was shown to be an ABCG2 substrate based on Abcg2−/− knockout mouse studies (J. W. Jonker et al., Proc. Natl. Acad. Sci. USA, 99: 15649–15654, 2002). We developed a functional assay for ABCG2 using PhA and the ABCG2 inhibitor fumitremorgin C.
Robert W, Robey   +6 more
openaire   +2 more sources

Pheophorbide a as a photosensitizer in photodynamic therapy: In vivo considerations [PDF]

open access: yesCancer Biology & Therapy, 2009
Commentary to:Pheophorbide a based photodynamic therapy induces apoptosis via mitochondrial-mediated pathway in human uterine carcinosarcoma Patrick Ming-Kuen Tang, Xiao-Zhuo Liu, Dong-Mei Zhang, Wing-Ping Fong and Kwok-Pui ...
Theresa, Busch   +2 more
openaire   +2 more sources

Pheophorbide Derivatives Isolated From Açaí Berries () Activate an Antioxidant Response Element In Vitro

open access: yesNatural Product Communications, 2019
Activity-guided fractionation was used to isolate and identify 2 components of the Brazilian açaí berry ( Euterpe oleracea Mart.) with the ability to induce antioxidant response element (ARE)-dependent gene transcription in human hepatoma (HepG2) cells ...
Suneel K. Kandagatla   +4 more
doaj   +1 more source

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