Nucleotides function as endogenous chemical sensors for oxidative stress signaling

Hideshi Ihara, Tomohiro Sawa, Yusaku Nakabeppu, Takaaki Akaike

Research output: Contribution to journalReview article

9 Citations (Scopus)

Abstract

Oxidized and nitrated nucleotides including 8-oxogunanine and 8-nitroguanine derivatives such as 8-nitroguanosine 3′,5′-cyclic monophosphate were generated by reactive nitrogen oxides and reactive oxygen species in cultured cells and in tissues. 8-oxoguanine and 8-nitroguanine in DNA and RNA are potentially mutagenic, and the former also induces cell death. Some derivative, 8-nitroguanosine 3′,5′-cyclic monophosphate a major nitrated guanine nucleotide, was identified as a novel second messenger. Surprisingly, the amount of 8-nitroguanosine 3′,5′-cyclic monophosphate generated was found to be higher than that of guanosine 3′,5′-cyclic monophosphate in cells expressing inducible nitric oxide synthase. More important, 8-nitroguanosine 3′,5′-cyclic monophosphate is electrophilic and reacted efficiently with sulf-hydryls of proteins to produce a novel posttranslational modification (named S-guanylation) via guanosine 3′,5′-cyclic monophosphate adduction. For example, 8-nitroguanosine 3′,5′-cyclic monophosphate-induced S-guanylation of Kelch-like ECH-associated protein 1 led to NF-E2-related factor activation and induction of antioxidant enzymes. 8-nitroguanosine 3′,5′-cyclic monophosphate may thus protect cells against oxidative stress-related cytotoxicity. Therefore, although chemically modified nucleotides produced via oxidative and nitrative stress are regarded simply as endogenous mutagens, the endogenous nucleotides stored in cells per se may serve functionally as a sensing mechanism for reactive nitrogen oxides and oxygen species to induce cellular adaptive responses to oxidative stress.

Original languageEnglish
Pages (from-to)33-39
Number of pages7
JournalJournal of Clinical Biochemistry and Nutrition
Volume48
Issue number1
DOIs
Publication statusPublished - Jan 1 2011

Fingerprint

Oxidative stress
Chemical sensors
Oxidative Stress
Nucleotides
Nitrogen Oxides
Guanosine
Reactive Oxygen Species
Cells
Derivatives
Reactive Nitrogen Species
Enzyme Induction
Guanine Nucleotides
Mutagens
Second Messenger Systems
Nitric Oxide Synthase Type II
Cell death
Post Translational Protein Processing
Cytotoxicity
8-nitroguanosine
Cultured Cells

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Nutrition and Dietetics
  • Clinical Biochemistry

Cite this

Nucleotides function as endogenous chemical sensors for oxidative stress signaling. / Ihara, Hideshi; Sawa, Tomohiro; Nakabeppu, Yusaku; Akaike, Takaaki.

In: Journal of Clinical Biochemistry and Nutrition, Vol. 48, No. 1, 01.01.2011, p. 33-39.

Research output: Contribution to journalReview article

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