Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search

 

Secrets of mighty cancer killing virus unlocked

Secrets of mighty cancer killing virus unlocked by Otago researchers

University of Otago researchers have used high-resolution electron microscopy images to reveal how an anti-cancer virus interacts with tumor cells, increasing its potential to save lives.

Seneca Valley Virus (SVV), a newly discovered virus which infects cancer cells but not normal tissue, has become a main research project in the laboratory of DrMihnea Bostina, Academic Director of Otago’s OMNI Electron Microscopy unit and senior lecturer in the Department of Microbiology and Immunology.

He hopes the results from this latest study, published in PNAS Latest Articles, will help to develop the virus for clinical use.

Working with researchers from Japan’s Okinawa Institute of Science and Technology, the group used cryo-electron microscopy to capture thousands of images of the virus bound to its receptor, using them to reconstruct a high resolution structure of the complex.

The structure demonstrates how SVV discriminates between its preferred receptor (cancer cells) and other similar proteins (healthy tissue).

“We can see exactly how the virus breaks into the cancer cells, while leaving other cells untouched,” Dr Bostina says.

The virus is a strong contender for effective virotherapy because it selectively targets a receptor found only in tumor cells in more than 60 per cent of human cancers.

The receptor, a protein called ANTXR1, is expressed on tumors, but it has a cousin, ANTXR2, that only appears on healthy tissues. SVV doesn’t bind with the similar receptor on healthy cells – it only shows strong affinity for ANTXR1.

SVV has already demonstrated its cancer-fighting abilities in clinical trials, but there is one problem – the body builds up immunity to the virus within a couple of weeks.

“This structure teaches us which part of the virus is essential for binding to the receptor and which is not. If we want to make the virus more efficient at invading cancer cells, we can leave intact the part that interacts with the cancer cells and modify the rest so the virus can escape the attack of the immune system,” Dr Bostina says.

Lead author and Otago PhD candidate Nadishka Jayawardena says he has “always been intrigued” by how naturally occurring micro-organisms can be used for human benefit.

“Being able to work on a virus that can kill cancers is very rewarding, especially knowing that one day our findings could potentially lead to tackling a major global health issue,” he says.

Dr Bostina believes this study showcases the high quality of work being done at OMNI and hopes it will encourage the future funding of more challenging structural projects.

ends

© Scoop Media

 
 
 
Business Headlines | Sci-Tech Headlines

 

Trees: Surge Funding For Kauri Dieback And Myrtle Rust Research

“The $13.75 million investment announced today will mean that scientists can begin critically important research into kauri dieback and myrtle rust. It is vital that we get this work underway now to ensure that we combat these two pathogens and protect these taonga species." More>>

ALSO:

In Time For The Cup: Spark Sets 5G Date, Without Any Spectrum

Spark chief executive Simon Moutter has a big hairy audacious goal, to get the company's 5G mobile network up and running by July 2020 ... More>>

ALSO:

Mesh Mess: Commerce Commission To Appeal Steel & Tube Sentence

The Commission has today filed an appeal against the sentence imposed on Steel and Tube Holdings Limited (Steel & Tube) for false and misleading representations about steel mesh products. More>>

"Bipartisan Inaction": Rapid Rent Increases

The median nationwide rent has gone up $20 a week over the past two month, a rapid increase that is part of an upward trend overseen by both Labour and National Governments... More>>

ALSO: