Genetics of rare congenital brain diseases

Eirik FrengenGroup leader
Eirik Frengen
Group leader

Rare and ultra-rare diseases affect less than 1 in 2000 and 1 in 50,000 people, respectively, and they often have a genetic cause. Even though these diseases are individually rare, there are >300 million rare disease patients globally.  Our main aim is to characterize the genetic cause and the molecular mechanisms causing congenital brain malformations in children obtaining knowledge about the biological consequences leading to the clinical presentation.

In our projects, we analyze Whole Exome/Genome Sequencing (WES/WGS) data from patients with likely monogenic brain diseases in order to identify potential pathogenic mutations in “novel disease genes” (i.e. genes not yet known to cause human diseases when mutated). We screen potential novel disease genes in international patient cohorts, and explore the functional consequences of the mutations by in vitro and in vivo experiments. This multidisciplinary approach allows us to gain insight about the etiology of the syndromes and further facilitate building of hypotheses to explain genotype-phenotype correlations.

These research projects have received funding from the Norwegian National Advisory Unit on Rare Disorders (NKSD). 

Norwegian version of this page

Genetics of ultra-rare neurological diseases

Our main aim is to reveal information about genetic mechanisms causing ultra-rare neurological diseases, and to obtain knowledge about how genetic defects alter cell biological processes leading to the clinical presentation.

The Orphanet database contains over 6000 unique rare diseases and about 250 are added annually. Even though each of the ultra-rare diseases affect less than 1 in 50 000 patients, in aggregate millions of people are affected.

We analyze Whole Genome Sequencing data searching for disease causing genetic variants in «novel disease genes», genes not yet known to cause human diseases when mutated.

We further explore the functional consequences of putative pathogenic variants by in vitro and in vivo modelling.

Our multidisciplinary project aims at revealing unique knowledge about the etiology of the diseases, which is crucial knowledge for the development of future therapy.

The research group is a part of Institute of Clinical Medicine, University of Oslo, and also the Research section at the Department of Medical Genetics, Oslo University Hospital.

Read more about our research on Genetics of rare congenital brain diseases on our website at Oslo University hospital.

Research projects

Molecular characterization of encephalopathies with onset in childhood 

Severe encephalopathies of likely genetic origin are clinically heterogeneous with life-long morbidity. We have detected the disease-causing variant in about two-thirds of the families analyzed and documented the molecular cause of several novel disease entities. 

Read more about the project on Molecular characterization of encephalopathies with onset in childhood on our website at Oslo University hospital.

Dysfunction of primary cilia in the etiology of congenital brain anomalies 

We recently initiated a project to characterize the molecular basis of congenital brain anomalies caused by primary cilia dysfunction. In this project, we recruit patients who lack a molecular diagnosis after WGS-based diagnostic analyses.

Read more about the project on Novel genes causing primary cilia dysfunction in congenital brain malformationson our website at Oslo University hospital.

Studying mouse knock-in models expressing the main Stormorken syndrome mutation

The only project without a focus on neurological diseases is our work on Stormorken syndrome. We have identified the cause of the syndrome and characterized a mouse line expressing the aberrant protein, STIM1 p.R304W. Our findings highlight the importance of STIM1 in the development and homeostasis of the skeleton and the skeletal muscle, and motivates further studies into how STIM1 R304W affects dental epithelial cell fate in mice.

Read more about the project on Studying mouse knock-in models expressing the Stormorken syndrome mutation on our website at Oslo University hospital.

 

Externally Funded Projects 

Our research projects have received funding from the Norwegian National Advisory Unit on Rare Disorders. We have also received funding for PhD-students through The Research Council of Norway's Quota scheme. 

Collaborators outside AMG 

  • N. Katsanis and E. E. Davis (Advanced Center for Translational and Genetic Medicine, Chicago, USA)
  • C. Romanin (Joahnnes Kepler University Linz, Austria)
  • P. Strømme (Department of Pediatrics, OUS)
  • C.A.M. Progida (IBV, UiO)
  • C.V. Esguerra (NCMM, UiO)
  • H.L. Nilsen (Department of Microbiology, OUS)
Published Apr. 10, 2012 9:44 AM - Last modified June 21, 2023 11:58 AM

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