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In cellular conformations of microRNA-34a via magnetic resonance

Objective

microRNA-34a (miR-34a) is mis-regulated in ~75% of cancers and is considered a promising drug target. In a recent clinical trial, miR-34a was used against terminal liver cancer showing promising result with remission of 3 patients. However, mortality remained high and was attributed to its ability to target multiple mRNAs. Project ECONOMICS will investigate this issue by elucidating the underlying structure and dynamics of multiple miR-34a:mRNA complexes using NMR spectroscopy and molecular dynamic simulations. This will provide information about the conformation of miR-34a which is mRNA specific. This can further be stabilized by mutations to increase target specificity of miR-34a leading to an improvement in clinical trial results. miR-34a targets and binds the 3’-untranslated-region (3’-UTR) of ~100 mRNAs via the RNA-induced silencing complex, resulting in downregulation of the associated genes. Recently, it was discovered that miR-34a attains a high energy excited state (ES) conformation for mRNA encoding gene SIRT1. Stabilizing this ES resulted in a two-fold increase in gene repression. Can miR-34a have a similar ES for other genes implicated in various cancers? This will be studied by exploring the structure and dynamics of miR-34a when complexed with 3’-UTR of the mRNA encoding the genes HNF4a, NOTCH1, NOTCH2, DLL1 and WNT1. Cellular environment is proposed to affect the ES of miR-34a, therefore a detailed conformational landscape of miR-34a:mRNA complexes will be mapped by comparing both in vitro and in live human cells (cancerous and non-cancerous). This study will provide targeting rules for microRNA within the cell and insight into its regulatory mechanism. This information will improve the efficiency RNA based drug development, giving a competitive edge to EU’s pharmaceutical industry, and ultimately realizing “Europe’s Beating Cancer plan” to achieve long-term survival of 70% patients with cancer by 2035.

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Keywords

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Programme(s)

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Topic(s)

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Funding Scheme

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

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(opens in new window) HORIZON-MSCA-2021-PF-01

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Coordinator

UPPSALA UNIVERSITET
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 172 406,40
Address
VON KRAEMERS ALLE 4
751 05 Uppsala
Sweden

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Region
Östra Sverige Östra Mellansverige Uppsala län
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

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