Medical Research Council - London Institute of Medical Sciences

Now in our 9th year of bringing you beautiful imagery from biomedical science every day

Fuse and Conquer

Insight into the intricate relationship between immune cells and infecting bacteria

10 June 2020

Fuse and Conquer

Hijacking the host cytoskeleton is a popular pathogen trick, but the bacterium Burkholderia thailandensis takes this strategy even further. Once inside a host cell, B. thailandensis (in green) uses the host’s actin fibres (in red) to promote fusion with other cells, forming giant cells in which it rapidly replicates. Studying this behaviour in mouse macrophages, researchers uncovered how the immune system fights back: activated by type I interferon, molecules known as guanylate-binding proteins (GBPs) prevent the bacteria from manipulating actin, ultimately hindering cell fusion. Without GBPs, the macrophages are more likely to fuse when infected by B. thailandensis, and mice lacking GBPs are more susceptible to infection. Closely-related pathogens B. mallei and B. pseudomallei, which cause serious diseases in humans, also rely on cell fusion to spread, so unpicking this process in B. thailandensis is a useful step towards understanding their strategies.

Written by Emmanuelle Briolat

Search The Archive

Submit An Image

What is BPoD?

BPoD stands for Biomedical Picture of the Day. Managed by the MRC London Institute of Medical Sciences the website aims to engage everyone, young and old, in the wonders of biomedicine. Images are kindly provided for inclusion on this website through the generosity of scientists across the globe.

Read More

BPoD is also available in Catalan at www.bpod.cat with translations by the University of Valencia.