30 July 2019

Advanced computer models of diseases can be used to improve diagnosis and treatment. The goal is to develop the models to “digital twins” of individual patients. Those twins may help to computationally identify and try the best medication, before actually treating a patient.

The research group at Linköping University
The research group at Linköping University Photographer: Magnus Johansson

The models are the result of an international study, published in the open access journal Genome Medicine.

One of the greatest problems in medical care is that medication is ineffective in 40-70% of patients with common diseases. One important reason is that diseases are seldom caused by a single, easily treatable “fault”. Instead, most diseases depend on altered interactions between thousands of genes in many different cell types. Another reason is that those interactions may differ between patients with the same diagnosis. There is a wide gap between this complexity and modern health care. An international research team aimed to bridge this gap by constructing computational disease models of the altered gene interactions across many cell types.

Tailored medication

“Our aim is to develop those models into ‘digital twins’ of individual patients’ diseases in order to tailor medication to each patient. Ideally, each twin will be computationally matched with and treated with thousands of drugs, before actually selecting the best drug to treat the patient”, says Dr Mikael Benson, professor at Linköping University, Sweden, who led the study.

The researchers started by developing methods to construct digital twins, using a mouse model of human rheumatoid arthritis. They used a technique, single-cell RNA sequencing, to determine all gene activity in each of thousands of individual cells from the sick mouse joints. In order to construct computer models of all the data, the researchers used network analyses.

Pressmeddelande individualiserad medicin, professor Mikael Benson, IKE Photo credit Magnus Johansson“Networks can be used to describe and analyse most complex systems”, says Dr Benson. “A simple example is a soccer team, in which the players are connected into a network based on their passes. The player that exchanges passes with most other players may be most important”.

Similar principles were applied to construct the mouse “twins”, as well as to identify the most important cell type. That cell type was computationally matched with thousands of drugs. Finally, the researchers showed that the “best” drug could be used to treat and cure the sick mice.

Diagnose disease in humans

The study also demonstrated that it may be possible to use the computer models to diagnose disease in humans. The researchers focused on the same cell type that was used for drug identification. This cell type, T cells, plays an important role in the immune defence, and serves as a fingerprint of the whole digital twin. The researchers analysed T cells from patients with thirteen diseases, including autoimmune diseases, cardiovascular diseases and various types of cancer. The diagnostic fingerprints could be used not only to distinguish patients from healthy people, but also to distinguish most of the diseases from each other.

“Since T cells function as a sort of spy satellite, which is continuously surveying the body to discover and combat disease as early as possible, it may be possible to use this cell type for the early diagnosis of many different diseases”, says Mikael Benson.

The study is based on an interdisciplinary collaboration between 30 researchers in Sweden, the US, Korea and Spain. The research has received financial support from the EU, NIH, the Swedish and Nordic Research Councils, and the Swedish Cancer Society.

The article: A validated single-cell-based strategy to identify diagnostic and therapeutic targets in complex diseases, Danuta R. Gawel, Jordi Serra-Musach, Sandra Lilja, Jesper Aagesen, Alex Arenas, Bengt Asking, Malin Bengnér, Janne Björkander, Sophie Biggs, Jan Ernerudh, Henrik Hjortswang, Jan-Erik Karlsson, Mattias Köpsén, Eun Jung Lee, Antonio Lentini, Xinxiu Li, Mattias Magnusson, David Martínez-Enguita, Andreas Matussek, Colm E. Nestor, Samuel Schäfer, Oliver Seifert, Ceylan Sonmez, Henrik Stjernman, Andreas Tjärnberg, Simon Wu, Karin Åkesson, Alex K. Shalek, Margaretha Stenmarker, Huan Zhang, Mika Gustafsson, Mikael Benson, (2019), Genome Medicine, published online. DOI 10.1186/s13073-019-0657-3

Translated by George Farrants

Latest news from LiU

Fawlty Towers - the invisible subtitlers revealed

Swedes read a lot - especially if you include film and TV subtitles. But does the subtitler themselves play any role? In search of an answer, researcher Lars Jämterud has looked at the translation of the classic British comedy series Fawlty Towers.

“Skin in a syringe” a step towards a new way to heal burns

Researchers have created what could be called “skin in a syringe”. The gel containing live cells can be 3D printed into a skin transplant, as shown in a study conducted on mice. This technology may lead to new ways to treat burns and severe wounds.

Murat Mirata, Associate Professor, and Marianna Lena Kambanou, Assistant Professor, outside the A Building.

Great potential for increased resource efficiency through industrial symbiosis

The need for more knowledge and experience in implementing industrial symbiosis in Europe led to the EU project Coralis – which has now been completed. Researchers from Linköping University led two of the project’s main areas.