Results 31 to 40 of about 5,603 (210)

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

Natural 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, Khozirah Shaari, Lee Hong Boon, Fadzly A. Kamarulzaman, Intan S. Ismail   +4 more
doaj   +1 more source

Photodynamic Therapy Using Pheophorbide a and Nd:YAG Laser

Neurologia medico-chirurgica, 1991
The authors describe a new photodynamic therapy (PDT) method for malignant brain tumors. Pheophorbide a (Ph-a), the photosensitizer, has low toxicity, causes no skin sensitization and is activated with an acoustic Q switched neodymium yttrium-argon-garnet (Nd:YAG) laser which achieves deep tissue penetration.
I, Fujishima, T, Sakai, T, Tanaka, H, Ryu, K, Uemura, Y, Fujishima, K, Horiuchi, N, Daikuzono, Y, Sekiguchi   +8 more
openaire   +3 more sources

Photosensitizer Drug Delivery via an Optical Fiber [PDF]

, 2011
: An optical fiber has been developed with a maneuverable miniprobe tip that sparges O2 gas and photodetaches pheophorbide (sensitizer) molecules. Singlet oxygen is produced at the probe tip surface which reacts with an alkene spacer group releasing ...
Adaickapillai Mahendran, Adam W., Adam W., Adam W., Aebisher D., Alexander Greer, Ashwini Ghogare, Bartlett P. D., Baruah A., Baugh S. D. P., Berg K., Bonnie I. Kruft, Busch T. M., Campo M. A., Cano M., Cramail C., David Aebisher, Ehrenberg B., Flickinger S. T., Flors C., Gabriel D., Givens R. S., Goutam Ghosh, Greer A., Greer A., Hahn S. M., Hajri A., Houghten R. A., Hu J., Jiang M. Y., Kammari L., Kanofsky J. R., Kessel D., Kessler M., Kim S., Laubach H. J., Lin Q., Lovell J. F., Lovell J. F., Matibur Zamadar, Mihaela Minnis, Moan J., Moor A. C. E., Nair V., Niedre M., Ogilby P. R., Pirrung M. C., Pohl E., Redmond R. W., Ruebner A., Schweitzer C., Singh A. K, Skovsen E., Smet M., Tanimura M., Wijtmans M., Xie Z., Yang J., Zaklika K. A., Zamadar M.   +59 more
core   +2 more sources

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

Cancer 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, Keith A, Cengel, Jarod, Finlay   +2 more
openaire   +2 more sources

PheophorbideaContent and Chlorophyllase Activity in Green Tea [PDF]

Bioscience, Biotechnology, and Biochemistry, 1998
We investigated the total content of pheophorbide a (PB a), which is sum of the contents of newly produced PB a, including PB a initially present and that converted from chlorophyllide a (Chd a) by the chlorophyllase reaction during incubation, in green tea samples, and found that the total content of PB a markedly increased in both Sencha and Matcha ...
K, Kohata, K, Hanada, Y, Yamauchi, H, Horie   +3 more
openaire   +2 more sources

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

Natural 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, Robin Tate Uhl, Tyler N. Graf, Nicholas H. Oberlies, Gregory M. Raner   +4 more
doaj   +1 more source

Trojan Horse nanotheranostics with dual transformability and multifunctionality for highly effective cancer treatment. [PDF]

, 2018
Nanotheranostics with integrated diagnostic and therapeutic functions show exciting potentials towards precision nanomedicine. However, targeted delivery of nanotheranostics is hindered by several biological barriers. Here, we report the development of a
Bo, Ruonan, Huang, Yee, Jia, Bei, Jing, Di, Li, Yuanpei, Lin, Tzu-Yin, Ma, Zhao, Wang, Zhongling, Wu, Hao, Xu, Xiaobao, Xue, Xiangdong, Yu, Weimin, Yuan, Ye   +12 more
core   +2 more sources

Unexpected Dual Function of Plant YUCCA Enzymes Links Chlorophyll Catabolism to Auxin Homeostasis

Angewandte Chemie, Volume 138, Issue 9, 23 February 2026.
YUCCA enzymes are well known to catalyze the main step of auxin biosynthesis in plants. Here, a hitherto undescribed dual function was discovered, revealing that some YUCCAs also act in chlorophyll degradation. In vitro feedback regulation furthermore suggests a link between chlorophyll degradation and hormone homeostasis and a physiological role of ...
Sina Rütschlin, Lei Zhang, Cornelia A. Karg, Michael Zwerger, Johanna M. Gostner, Simone Moser, Robin Teufel   +6 more
wiley   +2 more sources

Concurrent Photooxidation and Photoreduction of Catechols and Para-Quinones by Chlorophyll Metabolites

Photochem
Photosynthesis is initiated when the sun’s light induces electron transfer from chlorophyll to plastoquinone, a para-quinone. While photosynthesis occurs in the intact chloroplasts of living plants, similar photochemical reactions between dietary ...
Katherine Phan, Emily E. Lessard, Joseph A. Reed, Meredith G. Warsen, Soren Zimmer, Lisa M. Landino   +5 more
doaj   +1 more source

Photomediated Larvicidal Activity of Pheophorbide a against Cercaria Larvae of Fasciola gigantica

Scientifica, 2017
Fasciolosis is a parasitic disease caused by Fasciola gigantica. The freshwater snail Lymnaea acuminata is the intermediate host of F. gigantica which cause endemic fasciolosis in the northern part of India. To investigate larvicidal activity of pure and
Divya Jyoti Singh, Vinay Kumar Singh, D. K. Singh   +2 more
doaj   +1 more source