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Home NEWS Science News Cancer

Putting the brakes on tumor stealth

Bioengineer by Bioengineer
December 6, 2018
in Cancer
Reading Time: 2 mins read
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Credit: Monash University


New research undertaken at Monash University has shed new light on how some cancers are able to escape our immune system.

The findings have significant implications for the burgeoning field of cancer immunotherapy, an approach that is focused on harnessing the remarkable power of our own immune system to seek out and destroy cancer.

The research, led by Dr Rich Berry from the Monash Biomedicine Discovery Institute (BDI) and ARC Centre of Excellence in Advanced Molecular Imaging, was published today in the journal Structure.

“The immune system is complex and highly regulated, comprising a number of accelerators and brakes,” explained Dr Berry.

“While the accelerators activate the immune system, the brakes are critical to maintain the balance and prevent the immune system attacking the body’s own healthy tissues.”

However, many tumours exploit this mechanism by expressing markers on their surface that engage the brakes, in order to restrict the immune system.

“One method of immunotherapy, termed ‘checkpoint inhibition’ involves blocking the immune brakes in order to unleash the formidable power of the immune system on the tumour,” Dr Berry said.

So far, two such brakes, PD-1 and CTLA-4, have been effectively targeted in the clinic. However, despite some positive results, many patients do not respond to these treatments. Scientists are on the hunt for new immune brakes to target.

Using high intensity X-rays at the state-of-the-art Australian Synchrotron, the team from Monash determined the 3D structure of a new immune brake, termed CD96. The structure reveals the precise molecular details of how CD96 binds to tumours.

“This is really exciting because studies using mouse models indicate that blocking CD96 might be even more effective at controlling tumour spread than the currently available treatments,” Dr Berry said.

These studies could pave the way for future experiments aimed at further interrogating the role of CD96 in tumour control, and ultimately aid in the development of novel agents for the treatment of a range of cancers.

Read the full paper in Structure, titled Structural basis for CD96 immune receptor recognition of nectin-like protein-5 (CD155).

###

About the Monash Biomedicine Discovery Institute

Committed to making the discoveries that will relieve the future burden of disease, the newly established Monash Biomedicine Discovery Institute at Monash University brings together more than 120 internationally-renowned research teams. Our researchers are supported by world-class technology and infrastructure, and partner with industry, clinicians and researchers internationally to enhance lives through discovery.

Media Contact
Grace Williams
[email protected]
61-399-059-597

Related Journal Article

http://dx.doi.org/10.1016/j.str.2018.10.023

News source: https://scienmag.com/

Tags: BiochemistrycancerMedicine/HealthMolecular Biology
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