at Google ScholarTitle data
Zhang, Tong ; Ghosh, Arindam ; Behringer-Pließ, Lisa ; Chouhan, Lata ; Cunha, Ana V. ; Havenith, Remco W. A. ; Butkevich, Eugenia ; Zhang, Lei ; Vázquez, Olalla ; Debroye, Elke ; Enderlein, Jörg ; Das, Shoubhik:
Proton Tunneling Allows a Proton-Coupled Electron Transfer Process in the Cancer Cell.
In: JACS Au.
(2024)
.
ISSN 2691-3704
DOI: https://doi.org/10.1021/jacsau.4c00815
Abstract in another language
Proton-coupled electron transfer (PCET) is a fundamental redox process and has clear advantages in selectively activating challenging C–H bonds in many biological processes. Intrigued by this activation process, we aimed to develop a facile PCET process in cancer cells by modulating proton tunneling. This approach should lead to the design of an alternative photodynamic therapy (PDT) that depletes the mitochondrial electron transport chain (ETC), the key redox regulator in cancer cells under hypoxia. To observe this depletion process in the cancer cell, we monitored the oxidative-stress-induced depolarization of mitochondrial inner membrane potential (MMP) using fluorescence lifetime imaging microscopy (FLIM). Typically, increasing metabolic stress of cancer cells is reflected in a nontrivial change in the fluorophore’s fluorescence lifetime. After 30 min of irradiation, we observed a shift in the mean lifetime value and a drastic drop in overall fluorescence signal. In addition, our PCET strategy resulted in drastic reorganization of mitochondrial morphology from tubular to vesicle-like and causing an overall depletion of intact mitochondria in the hypodermis of C. elegans. These observations confirmed that PCET promoted ROS-induced oxidative stress. Finally, we gained a clear understanding of the proton tunneling effect in the PCET process through photoluminescence experiments and DFT calculations.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Organic Chemistry I - Photo- und Elektrokatalyse für Nachhaltigkeit > Chair Organic Chemistry I - Photo- und Elektrokatalyse für Nachhaltigkeit - Univ.-Prof. Dr. Shoubhik Das |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 540 Chemistry |
| Date Deposited: | 12 Dec 2024 09:15 |
| Last Modified: | 12 Dec 2024 09:15 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/91385 |