Work begins to create artificial human DNA from scratch 26 June 2025 Share Save Pallab Ghosh • @BBCPallab Science Correspondent Gwyndaf Hughes Science Videographer Share Save How the researchers hope to create human DNA Work has begun on a controversial project to create the building blocks of human life from scratch, in what is believed to be a world first.

The research has been taboo until now because of concerns it could lead to designer babies or unforeseen changes for future generations.

But now the World's largest medical charity, the Wellcome Trust, has given an initial £10m to start the project and says it has the potential to do more good than harm by accelerating treatments for many incurable diseases.

Dr Julian Sale, of the MRC Laboratory of Molecular Biology in Cambridge, who is part of the project, told BBC News the research was the next giant leap in biology.

"The sky is the limit.

We are looking at therapies that will improve people's lives as they age, that will lead to healthier aging with less disease as they get older.

"We are looking to use this approach to generate disease-resistant cells we can use to repopulate damaged organs, for example in the liver and the heart, even the immune system," he said.

But critics fear the research opens the way for unscrupulous researchers seeking to create enhanced or modified humans.

Pat Thomas, director of the campaign group Beyond GM, said: "We like to think that all scientists are there to do good, but the science can be repurposed to do harm and for warfare".

Details of the project were given to BBC News on the 25th anniversary of the completion of the Human Genome Project, which mapped the molecules in human DNA and was also largely funded by Wellcome. Getty Images Artwork: The aim is to build sections of human DNA from scratch Every cell in our body, with the exception of red blood cells, contains a molecule called DNA which carries the genetic information it needs.

DNA is built from just four much smaller blocks referred to as A, G, C and T, which are repeated over and over again in various combinations.

Amazingly it contains all the genetic information that physically makes us who we are. The Human Genome Project enabled scientists to read all human genes like a bar code.

The new work that is getting under way, called the Synthetic Human Genome Project, potentially takes this a giant leap forward – it will allow researchers not just to read a molecule of DNA, but to create parts of it – maybe one day all of it - molecule by molecule from scratch.

BBC News Scientists will begin developing tools to create ever larger sections of human DNA The scientists' first aim is to develop ways of building ever larger blocks of human DNA, up to the point when they have synthetically constructed a human chromosome.

These contain the genes that govern our development, repair and maintenance. These can then be studied and experimented on to learn more about how genes and DNA regulate our bodies. Many diseases occur when these genes go wrong so the studies could lead to better treatments, according to Prof Matthew Hurles, director of the Wellcome Sanger Insititute which sequenced the largest proportion of the Human Genome.

"Building DNA from scratch allows us to test out how DNA really works and test out new theories, because currently we can only really do that by tweaking DNA in DNA that already exists in living systems".

BBC News Machines at the Sanger Institute were used to sequence the human genome

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