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Mechanisms of microRNA biogenesis and turnover

MicroRNAs (miRNAs) are a novel class of genes, accounting for >1% of genes in a typical animal genome. They constitute an important layer of gene regulation that affects diverse processes such as cell differentiation, apoptosis, a... ver más

30/04/2015

FMI

2M€

Presupuesto del proyecto: 2M€

Líder del proyecto

FRIEDRICH MIESCHER INSTITUTE FOR BIOMEDICAL R... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

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Líder del proyecto

FRIEDRICH MIESCHER INSTITUTE FOR BIOMEDICAL R... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 2M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto MicroRNAs (miRNAs) are a novel class of genes, accounting for >1% of genes in a typical animal genome. They constitute an important layer of gene regulation that affects diverse processes such as cell differentiation, apoptosis, and metabolism. Despite such critical roles, deciphering the mechanism of action of miRNAs has been difficult, leading to multiple, partially contradictory, models of miRNA activity. Moreover, adding an additional layer of complexity, it is now emerging that miRNA activity is regulated by various mechanisms that we are only beginning to identify. Our objective is to understand how miRNAs are regulated under physiological conditions, in the roundworm Caenorhabditis elegans. We will focus on pathways of miRNA turnover, an issue of fundamental importance that has received little attention because miRNAs are widely held to be highly stable molecules. However, miRNA over-accumulation causes aberrant development and disease, prompting us to test rigorously whether degradation can antagonize miRNA activity and either identify the machinery involved, or confirm the dominance of other regulatory modalities, whose components we will identify. C. elegans is the organism in which miRNAs and many components of the miRNA machinery were discovered. However, previous studies emphasized genetics and cell biology approaches, limiting the degree of mechanistic insight that could be obtained. In addition to exploiting the traditional strengths of C. elegans, we will therefore develop and apply biochemical and genomic techniques to obtain a comprehensive understanding of miRNA regulation, enabling us to demonstrate both molecular mechanisms and physiological relevance. Given the importance of miRNAs in development and disease, identifying the regulators of these tiny gene regulators will be both of scientific interest and biomedical relevance.

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