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Updated: Jul 26, 2026

Preparation and In Vivo Use of an Activity-based Probe for N-acylethanolamine Acid Amidase
Published on: November 23, 2016
Adduct formation between oxanine and amine derivatives
T Nakano1, H Terato, K Asagoshi
1Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
Nitric oxide (NO) creates Oxanine (Oxa), a guanine lesion. Oxa reacts with cellular amines like spermidine and lysine, revealing a new DNA damage pathway from NO.
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- Nitric oxide (NO) is a signaling molecule with diverse biological roles.
- Under aerobic conditions, NO can induce oxidative stress and DNA damage.
- Oxanine (Oxa) is a significant guanine lesion formed by NO-mediated oxidative damage.
Purpose of the Study:
- To investigate the genotoxic mechanism of Oxanine (Oxa) DNA lesions.
- To identify cellular molecules that interact with Oxa.
- To elucidate a novel pathway of NO-induced DNA damage.
Main Methods:
- Site-specific incorporation of Oxa into synthetic oligonucleotides.
- Incubation of modified oligonucleotides with cellular amines.
- Analysis of reaction products using advanced analytical techniques.
Main Results:
- Oxanine (Oxa) lesions were confirmed to react with cellular amines.
- Specific adducts were identified between Oxa and spermidine.
- Adducts were also observed between Oxa and the amino acid lysine.
Conclusions:
- Oxanine (Oxa) can form adducts with cellular polyamines and amino acids.
- This interaction suggests a novel genotoxic mechanism for NO-induced DNA damage.
- Understanding Oxa adduct formation is crucial for assessing NO-related genotoxicity.
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