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Large international study points at three pathways towards type 1 diabetes

Photo of a researcher at Lund University.
Markus Lundgren is the principal investigator of the prospective study in Sweden which has contributed with data to the study about the progression of type 1 diabetes. Photo: Johan Persson

A large international study has identified three different pathways towards type 1 diabetes in children. Researchers at Lund University Diabetes Centre have contributed with data from a prospective study in southern Sweden. An important objective with the study published in Nature Communications is to gain a better understanding of how the disease develops to be able to take preventive measures.

“This study gives new insights into the development of the disease in children who are at high risk of developing the disease. We have gathered data from five prospective studies from several different countries, which is a great strength. Our research colleagues at IBM Research have the knowledge of machine learning and data visualisation that this project has required,” says Markus Lundgren, researcher in pediatric endocrinology at Lund University Diabetes Centre (LUDC) and one of the authors of the study, published in Nature Communications.

The study in Nature Communications includes data from 24.662 children, who have been followed for 15 years. Data are derived from five prospective studies of children in United States, Sweden, Germany and Finland. Researchers at Lund University Diabetes Centre have provided data from the study Diabetes prevention in Skåne, where children in southern Sweden have been screened for type 1 diabetes risk from infancy up to 15 years of age.

Three pathways

The research team studied the pathway from being a healthy individual to progression to type 1 diabetes in 652 individuals. Until now, type 1 diabetes has often been divided into different stages depending on how many diabetes related autoantibodies the individual has got. The new study shows that type 1 diabetes instead can be divided into three different groups based on the patterns of developing autoantibodies.

“We have been able to identify three distinct trajectories, or pathways, from healthy individual to diagnosis, that are associated with varying degree of disease risk,” says Bum Chul Kwon, first author of the study and researcher of data visualisation and visual analytics at IBM Research.

In discussing this new study in Nature Communications, Markus Lundgren, principal investigator of the prevention study in southern Sweden says:

“This may be seen as a first step towards a categorisation of patients with type 1 diabetes into subgroups. We have identified that the groups differ and need to find out more about how they differ by for example studying genetic factors that may play a role.” 

Screening for type 1 diabetes

It is currently not possible to prevent or cure type 1 diabetes, which is why research on prevention and early detection is important. The researchers behind the study hope that the new knowledge may pave the way for screening programmes for type 1 diabetes. 

“An important goal is to create a disease progression model that will be able to predict the disease with high accuracy. It is however of great importance that the health care system has more to offer people at risk of developing the disease before screening can be a viable option, such as a treatment that will delay the disease progression,” says Markus Lundgren.

The study has been funded by JDRF International. Frank Martin, senior director at the organisation’s research department, thinks that the study has transformative potential. 

“Only through better screening, monitoring, and risk education can we minimise the near- and long-term health consequences associated with missed diagnoses,” Frank Martin says.

The three groups

Diabetes related autoantibodies are often used to identify people at risk of developing type 1 diabetes. The researchers have been studying the following autoantibodies in diabetes: IAA, GADA and IA-2A. The study in Nature Communications has identified three groups of patients with different patterns of autoantibodies.

First group
Individuals in this group had several of the diabetes related autoantibodies before the diagnosis could be confirmed.

Second group
Children in the second group had autoantibodies against insulin (IAA) and developed other autoantibodies over time before the diagnosis could be confirmed.

Third group
Individuals in the third group first developed autoantibodies against GAD65 (GADA) before other autoantibodies emerged and the diagnosis could be confirmed.

Contact

Markus Lundgren, specialist physician and researcher in paediatric endocrinology at Lund University 

+46 70 995 09 90

markus [dot] lundgren [at] med [dot] lu [dot] se

Markus Lundgren’s profile in Lund University’s research portal

Åke Lernmark, professor of experimental diabetes at Lund University

+46 70 616 47 79
+46 40 39 19 01

ake [dot] lernmark [at] med [dot] lu [dot] se

Åke Lernmark's profile in Lund University's research portal

Type 1 diabetes 

Type 1 diabetes is caused by an autoimmune reaction in which the body’s immune system attacks the insulin-producing beta cells of the pancreas. As a result, the body produces very little or no insulin. People with type 1 diabetes need daily insulin injections to maintain a glucose level in the appropriate range. There is currently no cure for this disease.

Type 1 diabetes may cause different complications. Ketoacidosis may occur in people who have high blood sugar levels and a lack of insulin. Hyperglycemia happens when the body does not produce enough insulin.

High blood sugar levels may be harmful to the body’s blood vessels and can lead to eye problems, poor kidney function, heart attack, stroke and angina. 
 

The study in Nature Communications

The title of the study: Progression of type 1 diabetes from latency to symptomatic disease is predicted by distinct autoimmune trajectories

The study in Nature Communications is the result of a research collaboration between IBM Research and five prospective studies.
Five prospective studies with children from four countries have been included in the study: DAISY, DEW-IT (USA), DiPiS (Sweden), DIPP (Finland) and BABYDIAB (Germany).

The study has been funded by JDRF International via JDRF Grants #1-RSC-2017-526-I-X and #1-SRA-2019-720-I-X to Lund University, in addition to JDRF grants to four other data contributing organisations and IBM. 

Link to the study in Nature Communications