Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

Professor Elizabeth Tunbridge explains.

Extract from article originally published in The Conversation

Genetic factors play a major role in schizophrenia but scientists are only now beginning to identify the specific genes involved. A new study published in Nature Neuroscience shows that rare mutations in the SETD1A gene dramatically increase the risk of developing schizophrenia. This implicates a specific biological pathway in schizophrenia, which may also be of significance beyond the condition.

Brain development

Patients with schizophrenia can experience hallucinations and delusions, as well as a lack of motivation and problems with social interactions. Schizophrenia affects around 1% of the population. There is no cure and better treatments are desperately needed.

Most scientists believe that the symptoms seen in patients with schizophrenia result from changes in the way in which the brain develops. These changes result in part from environmental factors (such as birth complications), but genes also play a major role.

The genetic basis of schizophrenia is complex. There are hundreds, if not thousands, of genes that contribute to a person’s risk of becoming ill, meaning that genetic samples from huge numbers of patients and healthy people are needed to prove the involvement of a given gene.

To add further complexity, there are lots of difference types of genetic changes that can occur within these genes to alter risk.

At one end of the spectrum are individual “letter” changes in the DNA sequence that that are common in the population as a whole, and individually have only a tiny effect on risk. At the other end of the spectrum are large-scale DNA changes, for example the deletion or duplication of whole genes, or groups of genes, which are rare but have a much greater effect on the likelihood that someone will become ill. Both these small, common variants and large DNA changes can be easily measured and analysed, and both have been shown to be important in schizophrenia. However, small-scale genetic changes that are rare are much more difficult to detect and might also be involved in schizophrenia.

 

Read the full article in The Conversation

Read more about Professor Elizabeth Tunbridge

NIHR OXFORD HEALTH BIOMEDICAL RESEARCH CENTRE NEWS

Please follow the link below to read the news on the NIHR BRC website.