Type 1 diabetes could develop when babies are still in the WOMB

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Type 1 diabetes may develop when babies are still in the womb, a study has found.

Previously experts thought that the condition only strikes when infants are older than six months.

But new research led by the University of Exeter found that the autoimmune disease – which occurs when the immune system attacks insulin-producing cells- can develop before infants are even born.

Experts said the breakthrough raises hope that scientists could find new treatments for type 1 diabetes.

Diabetes occurs when blood sugar levels rise to risky levels and can lead to fatal complications, including amputations, sight loss, kidney disease, stroke and heart disease.

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Experts said the breakthrough raises hope that scientists could find new treatments for type 1 diabetes

Type 1 diabetes is an unpreventable autoimmune disease that usually develops in childhood, but type 2 is mostly caused by poor diet.

Until recently, it was thought that children under six months could only develop neonatal diabetes, which is caused by a genetic mutation, and not type 1 diabetes.

But a study of more than 400 children with diabetes, published yesterday in Diabetologia, found that children could also develop the disease before the age of six months even if they didn’t have the genetic mutation.

It is the first time an autoimmune condition that isn’t caused by a single genetic change has been seen in children this young.

The research team also discovered that children with this very early onset type 1 diabetes had a lower than average birth weight.

Usually a foetus begins making insulin in the womb, helping them to grow.

But the new findings suggest the immune attack behind type 1 diabetes could start before birth in some babies, leading to reduced insulin production and consequently lower birth weight.

Dr Elizabeth Robertson, Director of Research at Diabetes UK who co-funded the research, said: ‘By revealing for the first time the existence of type 1 diabetes in the very first few months of life, these important findings rewrite our understanding of when the condition can strike and when the immune system can start to go wrong. 

‘We now need to piece together how and why type 1 diabetes can develop at such a young age.

‘This could also unlock crucial insights into causes of type 1 diabetes more generally in people of all ages, and will be essential to develop treatments that stop or prevent this life-altering condition in babies.’ 

Dr Matthew Johnston, Exeter Centre of Excellence in Diabetes (ExCEED) E3 Research Fellow at the University of Exeter, said: ‘This study proves that type 1 diabetes can present in the first few months of life, and in a tiny subset of infants may even begin before birth. 

‘We also found that diabetes diagnosed so young was associated with rapid progression to complete destruction of insulin producing beta cells.’ 

Dr Richard Oram, Diabetes UK Harry Keen Fellow at the University of Exeter, said: ‘The next phases of this work, where we study the immune system in more detail, will hopefully help explain how it is possible for type 1 diabetes to develop so early and whether these insights could open up new ways to prevent or treat the condition in the future.’ 

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