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MECoCaM

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Human gut Microbiome gene Expression and Colorectal Cancer Assigning causal ro...

Human gut Microbiome gene Expression and Colorectal Cancer Assigning causal roles from a novel Mendelian randomization perspective. The contribution of the gut microbial ecosystem to colorectal cancer (CRC) is not well understood. Inflammatory processes and unbalance cell proliferation in the host could be behind observed correlations between a microbe and can... ver más

02/09/2020

FUNDACIO INSTITUT...

158K€

Presupuesto del proyecto: 158K€

Líder del proyecto

FUNDACIO INSTITUT D?INVESTIGACIO BIOMEDICA DE... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5 | 16M€

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2020-09-02

MSCA-IF-2017: Individual Fellowships

I+D

Cerrada hace 7 años

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1 Participantes

FUNDACIO INSTITUT D?INVESTIG...

158.12K€ | Lider

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Duración del proyecto: 28 meses Fecha Inicio: 2018-04-05
Fecha Fin: 2020-09-02

Líder del proyecto

FUNDACIO INSTITUT D?INVESTIGACIO BIOMEDICA DE... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5 | 16M€

Presupuesto del proyecto 158K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto The contribution of the gut microbial ecosystem to colorectal cancer (CRC) is not well understood. Inflammatory processes and unbalance cell proliferation in the host could be behind observed correlations between a microbe and cancer stages. However, the enrichment of a microbe at a tumour site does not directly assume causation. Rather, this could be the result of a reverse causation or a confounding third factor. Therefore, two major challenges unravelling CRC aetiology are (i) to identify the mechanistic interactions of microbial communities with host intestinal epithelium cells, and (ii) to assign causality to carcinogenesis. These are the aims of this project integrating different omic data, and using a Mendelian randomization (MR) approach. In this study we analyse microbiome sequencing data, from up to 500 normal colon mucosa biopsies, to provide a comprehensive description of the gut microbiome. Additionally, we integrate transcriptomic data from these well phenotyped 500 samples to understand the interaction between microbes and the gut epithelial cells. Finally, using the germ-line genetic variation of host cells as a third omic layer, the correlations between microbes and (i) environmental exposures, (ii) gene expression, and (iii) CRC can be validated by MR. MR is an analytical approach whereby germ-line genetic markers are used as proxies – or instrumental variables – for putative risk factors. These genetic markers cannot be influenced by reverse causation, and, assuming an absence of pleiotropy, can provide unconfounded estimates of association. Therefore, a MR association between genetic proxies and the outcome of interest would indicate that the exposure being proxied is associated in a causal manner. The identification of the functional relevance and key mediators of gut microbiome to colorectal cancer development is going to increase the development of therapeutic approaches and prevention strategies.

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