Chinese scientists create gene-edited monkey clones with mental health disorders

Researchers say experiments could help treat human diseases ranging from brain conditions to cancers

Josh Gabbatiss
Science Correspondent
Wednesday 23 January 2019 19:15
Comments
Chinese scientists create gene-edited monkey clones with mental health disorders

A group of five gene-edited macaque monkeys has been cloned using skin cells in a move the scientists behind the work say will help understand human diseases.

As clones, all the monkeys have the same DNA altered, resulting in symptoms seen in human conditions including anxiety, depression and schizophrenia.

Undertaken at a laboratory in China, the work used the same technique as that applied to produce Zhong Zhong and Hua Hua – the first two cloned monkeys – last year.

By creating primates with identical genes and symptoms, the researchers hope to test new treatments for diseases ranging from brain disorders to cancers.

In this case, they knocked out the gene responsible for BMAL1, a substance that affects the body’s circadian rhythms.

The scientists then took cells from ones of the donor monkeys that had been gene edited and displayed symptoms including reduced sleep time and those associated with mental health problems.

They used these donor cells to clone a group of monkeys with the same disease-causing mutation.

“Disorder of circadian rhythm could lead to many human diseases, including sleep disorders, diabetic mellitus, cancer and neurodegenerative diseases,” said Dr Hung-Chun Chang, a senior researcher for the project at the Chinese Academy of Sciences.

Upon the announcement of the cloned monkeys early last year, other scientists welcomed it as an impressive technical achievement.

However, they also warned of ethical issues associated with cloning primates. In the attempt to create Zhong Zhong and Hua Hua, the scientists went through dozens of cloned embryos and monkeys that only survived a few days.

Primate research is tightly controlled, meaning it is unlikely such techniques will be widely applied.

But the scientists behind the work said cloning allows the number of monkeys used to be reduced, due to uniform genetic background cutting out unhelpful noise from the resulting data.

“This line of research will help to reduce the amount of macaque monkeys currently used in biomedical research around the world,” said Professor Mu-ming Poo “Without the interference of genetic background, a much smaller number of cloned monkeys carrying disease phenotypes may be sufficient for pre-clinical tests of the efficacy of therapeutics.”

Meet Zhongzhong and Huahua, the first cloned monkeys in the world

The results of their experiments were published in the English language Chinese journal National Science Review.

The advent of cloned monkeys brought fears that the technique would soon be applied to humans, although these were dismissed by scientists.

Gene editing in humans also remains highly controversial, with another Chinese researcher – the disgraced Professor He Jiankui – facing global condemnation after he told the world he had created the first gene-edited babies.

Register for free to continue reading

Registration is a free and easy way to support our truly independent journalism

By registering, you will also enjoy limited access to Premium articles, exclusive newsletters, commenting, and virtual events with our leading journalists

Please enter a valid email
Please enter a valid email
Must be at least 6 characters, include an upper and lower case character and a number
Must be at least 6 characters, include an upper and lower case character and a number
Must be at least 6 characters, include an upper and lower case character and a number
Please enter your first name
Special characters aren’t allowed
Please enter a name between 1 and 40 characters
Please enter your last name
Special characters aren’t allowed
Please enter a name between 1 and 40 characters
You must be over 18 years old to register
You must be over 18 years old to register
Opt-out-policy
You can opt-out at any time by signing in to your account to manage your preferences. Each email has a link to unsubscribe.

By clicking ‘Create my account’ you confirm that your data has been entered correctly and you have read and agree to our Terms of use, Cookie policy and Privacy notice.

This site is protected by reCAPTCHA and the Google Privacy policy and Terms of service apply.

Already have an account? sign in

By clicking ‘Register’ you confirm that your data has been entered correctly and you have read and agree to our Terms of use, Cookie policy and Privacy notice.

This site is protected by reCAPTCHA and the Google Privacy policy and Terms of service apply.

Register for free to continue reading

Registration is a free and easy way to support our truly independent journalism

By registering, you will also enjoy limited access to Premium articles, exclusive newsletters, commenting, and virtual events with our leading journalists

Already have an account? sign in

By clicking ‘Register’ you confirm that your data has been entered correctly and you have read and agree to our Terms of use, Cookie policy and Privacy notice.

This site is protected by reCAPTCHA and the Google Privacy policy and Terms of service apply.

Join our new commenting forum

Join thought-provoking conversations, follow other Independent readers and see their replies

Comments

Thank you for registering

Please refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in