Group Fellman

Experimental studies of GRACILE syndrome

The rationale of this project is the clinical need to clarify pathophysiological mechanisms of mitochondrial disorders and to develop treatment strategies for the benefit of patients.

Mutations in the mitochondrial assembly factor BCS1L are the most common cause of respiratory chain complex III deficiency, the most severe of them being the neonatal lethal GRACILE syndrome. These patients have hepatopathy, tubulopathy and lactic acidosis at birth, but no signs of encephalopathy possible due to short life span. Knock-in mice generated by prof. Fellman’s group and harboring the human patient mutation display growth failure and progressive liver disorder from the fourth week of age, tubulopathy and short life span. The mice have a disease-free postnatal period until 4 weeks of age, which gives an excellent time window to perform interventions at presymptomatic stage. We utilize this mouse model in studies of disease mechanism and in interventional studies. These include pharmacological treatments and gene therapy (transgenic alternative oxidase, wild-type Bcs1l, hepatocyte transplantation). Promising beneficial effects are emerging from gene therapy.

We have expertise in the following methods: mouse phenotyping, respirometry of mitochondria, blue native PAGE, respiratory chain complex III activity, metabolic assessments (CLAMs, metabolomics, transcriptomics), cardiac investigations on mice (echocardiography, blood pressure measurements). Moreover, we use Drosophila as a model organism in mechanistic studies.

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Senior Scientist

Jukka Kallijärvi, PhD, Docent, Administrative Group Leader

Graduate Students

Jayasimman Rajendran, MSc

Janne Purhonen, MNutrSc

Nikica Tomasic, MD (Lund and Zagreb Universities)


Elisa Altay, MSc, Laboratory Coordinator 

Purhonen J, Rajendran J, Uusi-Rauva K, Katayama S, Krjutskov K, Einarsdottir E, Velapugi V, Kere J, Jauhiainen M, Fellman V, Kallijärvi J. Ketogenic diet attenuates hepatopathy in mouse model of respiratory chain complex III deficiency caused by a Bcs1l mutation. Sci Rep 7(1):95 (2017)

Tegelberg S, Tomašić N, Kallijärvi J, Purhonen J, Elmér E, Lindberg E, Gisselsson Nord D, Soller M, Lesko N, Wedell A, Bruhn H, Freyer C, Stranneheim H, Wibom R, Nennesmo I, Wredenberg A, Eklund E and Fellman V. Respiratory chain complex III deficiency due to mutated BCS1L: a novel phenotype with encephalomyopathy, partially phenocopied in a Bcs1l mutant mouse model. Orphanet J Rare Dis 12:73 (2017)

Davoudi M, Kotarsky H, Hanson E, Kallijärvi J, Fellman V. Supercomplex formation is modified by SCAF1/COX7A2l assembly factor and pre-complex III in different mouse strains with a homozygous Bcs1l mutation. PLoS One 11(12):e0168774 (2016)

Rajendran J, Tomašić N, Kotarsky H, Hansson E, Velagapudi V, Kallijärvi J, Fellman V. Effect of high-carbohydrate diet on plasma metabolome in mice with mitochondrial respiratory chain complex III deficiency. Int J Mol Sci. 17(11). pii: E1824 (2016)

A mouse model of mitochondrial complex III dysfunction induced by myxothiazol. Davoudi M, Kallijärvi J, Marjavaara S, Kotarsky H, Hansson E, Levéen P, Fellman V. Biochem Biophys Res Commun. 2014 Apr 18;446(4):1079-84. doi: 10.1016/j.bbrc.2014.03.058.

Complex I function and supercomplex formation are preserved in liver mitochondria despite progressive complex III deficiency. Davoudi M, Kotarsky H, Hansson E, Fellman V. PLoS One. 2014 Jan 22;9(1):e86767. doi: 10.1371/journal.pone.0086767.

Mitochondrial respiration in human viable platelets - methodology and influence of gender, age and storage. Sjövall F, Ehinger JK, Marelsson SE, Morota S, Frostner EA, Uchino H, Lundgren J, Arnbjörnsson E, Hansson MJ, Fellman V, Elmér E. Mitochondrion. 2013 Jan;13(1):7-14. doi: 10.1016/j.mito.2012.11.001.

Metabolite profiles reveal energy failure and impaired beta-oxidation in liver of mice with complex III deficiency due to a BCS1L mutation. Kotarsky H, Keller M, Davoudi M, Levéen P, Karikoski R, Enot DP, Fellman V. PLoS One. 2012;7(7):e41156. doi: 10.1371/journal.pone.0041156.

The GRACILE mutation introduced into Bcs1l causes postnatal complex III deficiency: a viable mouse model for mitochondrial hepatopathy. Levéen P, Kotarsky H, Mörgelin M, Karikoski R, Elmér E, Fellman V. Hepatology. 2011 Feb;53(2):437-47. doi: 10.1002/hep.24031.

Mitochondrial hepatopathies in the newborn period. Fellman V, Kotarsky H. Semin Fetal Neonatal Med. 2011 Aug;16(4):222-8. doi: 10.1016/j.siny.2011.05.002.

Characterization of complex III deficiency and liver dysfunction in GRACILE syndrome caused by a BCS1L mutation. Kotarsky H, Karikoski R, Mörgelin M, Marjavaara S, Bergman P, Zhang DL, Smet J, van Coster R, Fellman V. Mitochondrion. 2010 Aug;10(5):497-509. doi: 10.1016/j.mito.2010.05.009.

Screening of BCS1L mutations in severe neonatal disorders suspicious for mitochondrial cause. Fellman V, Lemmelä S, Sajantila A, Pihko H, Järvelä I. J Hum Genet. 2008;53(6):554-8. doi: 10.1007/s10038-008-0284-0.

GRACILE syndrome, a lethal metabolic disorder with iron overload, is caused by a point mutation in BCS1L. Visapää I, Fellman V, Vesa J, Dasvarma A, Hutton JL, Kumar V, Payne GS, Makarow M, Van Coster R, Taylor RW, Turnbull DM, Suomalainen A, Peltonen L. Am J Hum Genet. 2002 Oct;71(4):863-76.

Iron-overload disease in infants involving fetal growth retardation, lactic acidosis, liver haemosiderosis, and aminoaciduria. Fellman V, Rapola J, Pihko H, Varilo T, Raivio KO. Lancet. 1998 Feb 14;351(9101):490-3.

Folkhälsan Research Foundation

Academy of Finland

Finska Läkaresällskapet ("Medical Society of Finland”)

Foundation for Pediatric Research in Finland

Swedish Research Council

Doc. Matti Jauhiainen, Department of Molecular Medicine, National Institute for Health and Welfare

Prof. Juha Kere, Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden

Prof. Howard Jacobs, Director of Institute of Biotechnology, University of Helsinki, Finland

Prof. Eero Mervaala, Department of Pharmacology, University of Helsinki

Doc. Eskil Elmér, Experimental Neuroscience, Lund University, Sweden

Doc. Erik Eklund, Pediatrics, Department of Clinical Sciences, Lund, Lund University

Doc. Matthias Mörgelin, Division of Infection Medicine, Clinical Sciences, Lund University, Sweden

Dr. Claudia Stöger, Project Manager, German Mouse Clinic, Helmholz Zentrum, München, Germany


    • Vineta Fellman

      MD, PhD, Professor emerita, Group Leader

    • Tel:
      +358 40 562 2666

    • Contact
    • Jukka Kallijärvi

      PhD, Docent, Administrative Group Leader

    • Tel:
      +358 50 448 7006

    • Contact