Medical Research Council - London Institute of Medical Sciences

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

Helpful Hippo

Cell growth controlled by a group of molecules called the Hippo pathway

29 August 2018

Helpful Hippo

Living organisms need a constant supply of new cells in order to grow to the right size, repair wounds, and replace old or damaged tissue. But too much cell proliferation can quickly lead to cancer. One of the most important genes involved in controlling size and cell growth is called Hippo, which gets its name because fruit flies lacking the gene become abnormally large and wrinkly, like little hippopotamuses. Hippo is found in a wide range of animals, from humans and other mammals down to tiny flatworms, and faults in the gene have been implicated in cancer. This bulging mass is a tumour on the side of a flatworm’s body, caused by switching off Hippo in a small group of cells. It proves that Hippo plays a vital role in controlling cell growth in the worms, suggesting what it might be doing to protect against cancer in more complex animals.

Written by Kat Arney

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 with translations by the University of Valencia.