Specificity from nonspecific interaction: regulation of tumor necrosis factor-α activity by DNA

The Journal of Biological Chemistry
Helena AndradeYixin Zhang

Abstract

As anionic biopolymers, oligonucleotides can have biological functions independent from their roles as the medium for the storage and flow of genetic information. In this paper, we investigated the interaction between DNA and the pro-inflammatory cytokine tumor necrosis factor-α (TNFα). Although various forms of DNA bind to TNFα with low μm dissociation constants, the interaction stabilizes the trimeric form of TNFα and enhances its cytotoxic effect. Based on this mechanism, a photoswitchable TNFα (TNFα-2-nitroveratryloxycarbonyl) has been designed whose sensitivity to DNA-mediated up-regulation of TNFα activity can be tuned by light irradiation. The mechanism described in this study represents a general model to understand the involvement of nonspecific interactions among biomolecules in regulating their biological functions. Because the interaction is not DNA sequence-specific, the resulting effect should be considered for oligonucleotide-based therapeutics in general.

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Citations

Sep 13, 2020·Journal of Molecular Modeling·Jorge Gutiérrez-FloresEstrella Ramos
Dec 17, 2020·Advanced Materials·Crystal S ShinGhanashyam Acharya

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