Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Profiling Ribonucleotide and Deoxyribonucleotide Pools Perturbed by Remdesivir in Human Bronchial Epithelial Cells

Version 1 : Received: 10 December 2020 / Approved: 11 December 2020 / Online: 11 December 2020 (15:57:14 CET)

How to cite: Li, Y.; Zhang, H.; Luo, W.; Lam, C.W.K.; Wang, C.; Bai, L.; Wong, V.K.W.; Zhang, W.; Jiang, Z. Profiling Ribonucleotide and Deoxyribonucleotide Pools Perturbed by Remdesivir in Human Bronchial Epithelial Cells. Preprints 2020, 2020120289 (doi: 10.20944/preprints202012.0289.v1). Li, Y.; Zhang, H.; Luo, W.; Lam, C.W.K.; Wang, C.; Bai, L.; Wong, V.K.W.; Zhang, W.; Jiang, Z. Profiling Ribonucleotide and Deoxyribonucleotide Pools Perturbed by Remdesivir in Human Bronchial Epithelial Cells. Preprints 2020, 2020120289 (doi: 10.20944/preprints202012.0289.v1).

Abstract

Remdesivir (RDV) has garnered much hope for its moderate anti-COVID-19 effects, but its limited amelioration of survival in hospitalized patient causes a huge controversy over the applicability of RDV to COVID-19 treatment. Developing strategies to improve its antivirus efficacy is urgently required. As anticipated, RDV exhibits similar behavior with other nucleotide analogs to disrupt the metabolism of natural endogenous ribonucleotides (RNs) and deoxyribonucleotides (dRNs). Alterations in endogenous RNs and dRNs play a critical role in virus replication as well as other key cellular functions. Thus elucidation of the disturbances of RDV on RNs and dRNs could help to understand its exact mechanism of action. Here, the metabolic profiling determined by liquid chromatography–mass spectrometry method showed a general increase in the abundance of nucleotides and a more than 2-fold increase for specific nucleotides. However, the variation of pyrimidine ribonucleotides was relative slight or even contrary, resulting in obvious imbalance between purine and pyrimidine ribonucleotides, which implied the obstacle of RDV to pyrimidine synthesis and could further block the transcription and replication of viral RNA. Additionally, the extreme disequilibrium between cytidine triphosphate (CTP) and cytidine monophosphate might result from the inhibition of CTP synthase and provide a metabolic target for the treatment of COVID-19 infection. Since nucleotides metabolism pathways are vulnerable to nucleotide analogues and are liable to be the regulation targets, it is promising to enhance the efficacy of RDV through co-administration with CTP synthase inhibitors or de novo pyrimidine synthesis inhibitors to exacerbate the imbalance of nucleotide pools.

Subject Areas

remdesivir; perturbation of nucleotide pools; inhibition of RNA and DNA synthesis; CTP synthase

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