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Two genes pinpointed as cause of diabetes in babies

13 January 2014

By Dr Shanya Sivakumaran

Appeared in BioNews 737

Scientists have identified mutations in two genes that cause neonatal diabetes, a rare condition affecting around one in 100,000 births.

The study, published in Cell Metabolism, brings the total number of genes that can cause permanent neonatal diabetes mellitus (PNDM) to 20.

As with adult-onset diabetes, PNDM is characterised by a deficiency of the hormone insulin, produced by the pancreas. Added complications that can occur in PNDM include muscle weakness, developmental delay and epilepsy.

The researchers looked at the DNA of 147 people with PNDM. Of those, 110 were found to carry mutations already identified as causing the condition. For the remaining participants, the researchers looked at genes already known to affect pancreatic development in mice. This additional analysis gave genetic diagnoses to 11 out of the remaining 37 participants, showing mutations in the genes NKX2-2 and MNX1 to be the cause in five subjects.

Dr Sarah Flanagan, the paper's lead author, from the University of Exeter said the findings were 'critical to the advancement of knowledge on how insulin-producing beta cells are formed in the pancreas, which has implications for research into manipulating stem cells, which could one day lead to a cure'.

Dr Alasdair Rankin, director of research for Diabetes UK, agreed that the paper 'helps us understand how the pancreas develops'.


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13 October 2014 - by Julianna Photopoulos 
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10 March 2014 - by Dr Linda Wijlaars 
A rare gene mutation lowers the risk of type 2 diabetes by almost two-thirds, an international collaboration of scientists from the US and Sweden has found...

06 January 2014 - by Dr Charlotte Warren-Gash 
A gene variant increases the risk of type 2 diabetes in Latin American populations, according to a study in Nature...
17 September 2012 - by Paola Quattroni 
The first single gene responsible for insulin sensitivity in humans has been discovered by researchers at the University of Oxford. The discovery has implications for understanding of type II diabetes...
20 August 2012 - by Dr Zara Mahmoud 
A large-scale statistical analysis of DNA from nearly 150,000 people of European descent has identified ten new regions of DNA that may help us understand the biological processes linked to glucose metabolism and insulin production in type 2 diabetes....
14 November 2011 - by George Frodsham 
Mice that don't produce a certain protein in their fat cells do not develop type 2 diabetes despite an increase in weight, scientists report. In a separate study, the same research group also managed to double the physical performance of mice by removing the same protein from their muscle cells...

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