Using CRISPR genome screens and dual transcriptome analyses to dissect host-pathogen interactions in tuberculosis

Información del proyecto

Host-TB

Identificador del acuerdo de subvención: 832721

DOI

10.3030/832721

Proyecto cerrado

Fecha de la firma de la CE 18 Abril 2019

Fecha de inicio 1 Junio 2019

Fecha de finalización 31 Mayo 2026

Financiado con arreglo a

• EXCELLENT SCIENCE - European Research Council (ERC)

Coste total

€ 2 160 926,00

Aportación de la UE

€ 2 160 926,00

Coordinado por

THE CHANCELLOR MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE
United Kingdom

Periodic Reporting for period 4 - Host-TB (Using CRISPR genome screens and dual transcriptome analyses to dissect host-pathogen interactions in tuberculosis)

Período documentado: 2023-10-01 hasta 2025-03-31

Resumen del contexto y de los objetivos generales del proyecto

With more than 10 million cases annually, tuberculosis (TB) remains a global health problem. TB epidemic is exacerbated by the spread of multidrug-resistant TB. Host-directed therapies can improve immune mechanisms by augmenting the ability of host cells to kill M. tuberculosis bacilli or by modulating the immune response to prevent excessive inflammation, cell death and tissue damage in the human body. Progress with the development of new host-directed therapies has been slowed down by the limited understanding of host-pathogen interactions during M. tuberculosis infection. Screens of the whole human genome can identify novel genes involved in the immune responses to M. tuberculosis infection and susceptibility to TB. Previously, we successfully used genome-wide association studies to identify human genes associated with susceptibility to TB. Here, we will use the groundbreaking CRISPR technology to screen the human genome in macrophages infected with M. tuberculosis and discover genes that are critically involved in host-pathogen interactions. Then, we will comprehensively characterise cellular signalling pathways that mediate impacts of these genes on both the human macrophage and the intracellular bacilli using dual transcriptome analyses and high-throughput microscopy assays. This novel approach will dissect crucial mechanisms of host-pathogen interaction during M. tuberculosis infection.

Trabajo realizado desde el comienzo del proyecto hasta el final del período abarcado por el informe y los principales resultados hasta la fecha

We performed the screens of human genome in CRISPR-Cas9-edited macrophages after their infection with M. tuberculosis. These screens revealed several genes that regulate death of human macrophages during infection.

Avances que van más allá del estado de la técnica e impacto potencial esperado (incluida la repercusión socioeconómica y las implicaciones sociales más amplias del proyecto hasta la fecha)

The novel human genes that affect susceptibility of macrophages to M. tuberculosis infection will be now validated in the follow-up experiments. Details of the mechanism of macrophage death will be thoroughly characterised for each of the newly identified genes and the role of virulence factors of M. tuberculosis will be also studied. Proteins encoded by these genes and their signalling pathways may provide novel targets for host-directed therapy of tuberculosis.

Human macrophages engulfing mycobacteria