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Inhibiting NOXO1 and CYBA binding to reduce NADPH oxidase I dependent ROS damage in skin explants
Senevirathne, Prasadini ; Sterling, Alyssa ; Anne Refaei, Mary , et al. Results Chem.,2023,6,101213. DOI: 10.1016/j.rechem.2023.101213
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Abstract: NADPH oxidases (NOXs) are newly identified enzymes that generate intracellular reactive oxygen species (ROS) in skin cells. Recent studies demonstrated that NOX1 holoenzyme is expressed in human keratinocytes and melanocytes, which are implicated in skin photo-carcinogenesis due to the high amounts of ROS produced. Holoenzyme activation requires a ternary complex comprised of NOX1, cytochrome B alpha chain (CYBA), and cytoplasmic NADPH Oxidase Organizer 1 (NOXO1) to properly form. By inhibiting this assembly process, an opportunity for reducing the production of catalytic ROS is possible, especially during high ROS conditions that occur under prolonged UV exposure. We designed a series of small mols. and evaluated their inhibitory effects on NOXO2 using in-silico docking methods in the 1WLP crystal structure. We show that the NOX_inh_5 inhibitor was successful in a variety of experiments using primary skin models from various skin tones. NOX_inh_5 proved to be non-cytotoxic while also improving the viability of primary human skin primary cells under UV exposure. Biophys. studies with NOX_inh_5 using an Isothermal calorimetric (ITC) binding and heteronuclear single quantum coherence (HSQC-NMR) exhibited inhibition of complex formation between NOXO2 and CYBA. Authentic human skin explants, treated with and without NOX_inh_5 and UV exposure, decreased p53 stabilization and decreased UV-induced DNA damage as quantified through cyclobutane dimer formation.
Keywords: Reactive oxygen species ; Apocynin ; UV ; Melanoma ; Sunscreen ; NOXO1 ; CYBA
Purchased from AmBeed: 1007-16-5 ; 111-24-0 ; 583-55-1 ; 455-85-6
CAS No. : | 111-24-0 | MDL No. : | MFCD00000268 |
Formula : | C5H10Br2 | Boiling Point : | - |
Linear Structure Formula : | CH2(C2H4Br)2 | InChI Key : | IBODDUNKEPPBKW-UHFFFAOYSA-N |
M.W : | 229.94 | Pubchem ID : | 8100 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P210-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H227-H315-H319 | Packing Group: | N/A |
GHS Pictogram: |
1,5-Dibromopentane (CAS: 111-24-0) can be used in the preparation of ETC-1002 (CAS: 738606-46-7). Bempedoic acid is a first-in-class adenosine triphosphate-citrate lyase (ACL) inhibitor.
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