Bjørnar Hassel

Adjunct Professor - Department of Neurohabilitation
Image of Bjørnar Hassel
Norwegian version of this page
Room Building 29, 2901006
Visiting address OUS Ullevål Kirkeveien 166 0450 Oslo
Postal address OUS, Ullevål Postboks 4956 Nydalen 0424 Oslo


  • Raheel, Tayyaba Qureshi; Bjørkmo, Mona; Nordengen, Kaja; Gundersen, Vidar; Utheim, Tor Paaske; Watne, Leiv Otto; Storm-Mathisen, Jon; Hassel, Bjørnar & Chaudhry, Farrukh Abbas (2020). Slc38a1 Conveys Astroglia-Derived Glutamine into GABAergic Interneurons for Neurotransmitter GABA Synthesis. Cells.  ISSN 2073-4409.  9(7), s 1- 12 . doi: 10.3390/cells9071686 Full text in Research Archive.
  • Rogne, Ane Gretesdatter; Müller, Ebba Gløersen; Udnæs, Eirin; Sigurdardottir, Solrun; Raudeberg, Rune; Connelly, James Pattrick; Rootwelt-Revheim, Mona-Elisabeth; Hassel, Bjørnar & Dahlberg, Daniel (2020). β-Amyloid may accumulate in the human brain after focal bacterial infection: An 18F-flutemetamol positron emission tomography study. European Journal of Neurology.  ISSN 1351-5101.  28(3), s 877- 883 . doi: 10.1111/ene.14622 Full text in Research Archive.
  • Sumathipala, Dulika Sanjeewani; Strømme, Petter; Gilissen, Christian; Einarsen, Ingunn Holm; Bjørndalen, Hilde; Server, Andrés; Corominas, Jordi; Hassel, Bjørnar; Fannemel, Madeleine; Misceo, Doriana & Frengen, Eirik (2020). Sudden death in epilepsy and ectopic neurohypophysis in Joubert syndrome 23 diagnosed using SNVs/indels and structural variants pipelines on WGS data: a case report. BMC Medical Genetics.  ISSN 1471-2350.  21:96, s 1- 6 . doi: 10.1186/s12881-020-01024-y
  • Zhou, Yun; Eid, Tore; Hassel, Bjørnar & Danbolt, Niels Christian (2020). Novel aspects of glutamine synthetase in ammonia homeostasis: Glutamine synthetase and ammonia. Neurochemistry International.  ISSN 0197-0186.  140, s 1- 18 . doi: 10.1016/j.neuint.2020.104809 Full text in Research Archive.
  • Hassel, Bjørnar; Rogne, Ane Gretesdatter & Hope, Sigrun (2019). Intellectual disability associated with pyridoxine-responsive epilepsies: The need to protect cognitive development. Frontiers in Psychiatry.  ISSN 1664-0640.  10:116, s 1- 8 . doi: 10.3389/fpsyt.2019.00116 Full text in Research Archive.
  • Holmøy, Anne Katrin; Johannessen, Cecilie Haggag; Hope, Sigrun; Van Walsem, Marleen Regina; Aanonsen, Nils Olav & Hassel, Bjørnar (2019). Uncovering health and social care needs among myotonic dystrophy patients: Utility of the Needs and Provisions Complexity Scale. Acta Neurologica Scandinavica.  ISSN 0001-6314.  139(6), s 526- 532 . doi: 10.1111/ane.13086
  • Raheel, Tayyaba Qureshi; Sørensen, Christina; Berghuis, Paul; Jensen, Vidar; Dobszay, Marton B.; Farkas, Tamás; Dalen, Knut Tomas; Guo, Caiying; Hassel, Bjørnar; Utheim, Tor Paaske; Hvalby, Øyvind Christian; Hafting, Torkel; Harkany, Tibor; Fyhn, Marianne & Chaudhry, Farrukh Abbas (2019). The glutamine transporter Slc38a1 regulates GABAergic neurotransmission and synaptic plasticity. Cerebral Cortex.  ISSN 1047-3211.  29(12), s 5166- 5179 . doi: 10.1093/cercor/bhz055 Full text in Research Archive.
  • Vohra, Rupali; Dalgaard, Line Marie; Vibæk, Jeppe; Langbøl, Mia Aggergaard; Bergersen, Linda Hildegard; Olsen, Niels Vidiendal; Hassel, Bjørnar; Chaudhry, Farrukh Abbas & Kolko, Miriam (2019). Potential metabolic markers in glaucoma and their regulation in response to hypoxia. Acta Ophthalmologica.  ISSN 1755-375X.  s 1- 10 . doi: 10.1111/aos.14021
  • Hassel, Bjørnar; Mariussen, Espen; Idland, Ane-Victoria; Dahl, Gry Torsæter; Ræder, Johan; Frihagen, Frede Jon; Berg, Jens Petter; Chaudhry, Farrukh Abbas; Wyller, Torgeir Bruun & Watne, Leiv (2018). CSF sodium at toxic levels precedes delirium in hip fracture patients. Neurotoxicology.  ISSN 0161-813X.  69(December), s 11- 16 . doi: 10.1016/j.neuro.2018.08.010
  • Hu, Qiu Xiang; Hansen, Sigrid Ottestad; Holmseth, Silvia; Hassel, Bjørnar; Danbolt, Niels Christian & Zhou, Yun (2018). Expression of glutamate transporters in mouse liver, kidney, and intestine. Journal of Histochemistry and Cytochemistry.  ISSN 0022-1554.  66(3), s 189- 202 . doi: 10.1369/0022155417749828 Full text in Research Archive. Show summary
  • Morland, Cecilie; Frøland, Anne-Sofie; Nguyen, Mi Mong Tran; Storm-Mathisen, Jon; Gundersen, Vidar; Rise, Frode & Hassel, Bjørnar (2018). Propionate enters GABAergic neurons, inhibits GABA transaminase, causes GABA accumulation and lethargy in a model of propionic acidemia. Biochemical Journal.  ISSN 0264-6021.  475(4), s 749- 758 . doi: 10.1042/BCJ20170814
  • Zhou, Yun; Dhaher, Roni; Parent, Maxime; Hu, Qiu Xiang; Hassel, Bjørnar; Yee, Siu-Pok; Hyder, Fahmeed; Gruenbaum, Shaun E.; Eid, Tore & Danbolt, Niels Christian (2018). Selective deletion of glutamine synthetase in the mouse cerebral cortex induces glial dysfunction and vascular impairment that precede epilepsy and neurodegeneration. Neurochemistry International.  ISSN 0197-0186.  s 1- 12 . doi: 10.1016/j.neuint.2018.07.009 Full text in Research Archive.
  • Zhou, Yun; Hassel, Bjørnar; Eid, Tore & Danbolt, Niels Christian (2018). Axon-terminals expressing EAAT2 (GLT-1; Slc1a2) are common in the forebrain and not limited to the hippocampus. Neurochemistry International.  ISSN 0197-0186.  123, s 101- 113 . doi: 10.1016/j.neuint.2018.03.006 Full text in Research Archive.
  • Dahlberg, Daniel; Struys, Eduard A.; Janssen, EE; Mørkrid, Lars; Midttun, Øivind & Hassel, Bjørnar (2017). Cyst Fluid From Cystic, Malignant Brain Tumors: A Reservoir of Nutrients, Including Growth Factor-Like Nutrients, for Tumor Cells.. Neurosurgery.  ISSN 0148-396X.  80(6), s 917- 924 . doi: 10.1093/neuros/nyw101 Show summary
  • Hassel, Bjørnar; De Souza, Gustavo Antonio; Stensland, Maria; Ivanovic, Jugoslav; Voie, Øyvind Albert & Dahlberg, Daniel (2017). The proteome of pus from human brain abscesses: Host-derived neurotoxic proteins and the cell-type diversity of CNS pus. Journal of Neurosurgery.  ISSN 0022-3085.  129(3), s 829- 837 . doi: 10.3171/2017.4.JNS17284 Show summary
  • Idland, Ane-Victoria; Wyller, Torgeir Bruun; Støen, Randi; Dahl, Gry Torsæter; Frihagen, Frede Jon; Brækhus, Anne; Hassel, Bjørnar & Watne, Leiv Otto (2017). Cerebrospinal Fluid Phosphate in Delirium after Hip Fracture. Dementia and geriatric cognitive disorders extra.  ISSN 1664-5464.  7(3), s 309- 317 . doi: 10.1159/000478723 Full text in Research Archive.
  • Dahlberg, Daniel; Ivanovic, Jugoslav & Hassel, Bjørnar (2016). Toxic levels of ammonia in human brain abscess. Journal of Neurosurgery.  ISSN 0022-3085.  124(3), s 854- 860 . doi: 10.3171/2015.1.JNS142582
  • Hassel, Bjørnar & Dingledine, Raymond (2016). A New Approach for Epilepsy. Cerebrum.  ISSN 1524-6205.  s 7- 16
  • Moen, Marivi Nabong; Fjær, Roar; Hamdani, El Hassan; Lærdahl, Jon Kristen; Menchini, Robin Johansen; Vigeland, Magnus Dehli; Sheng, Ying; Undlien, Dag Erik; Hassel, Bjørnar; Salih, MA; Khashab, HY; Selmer, Kaja Kristine & Chaudhry, Farrukh Abbas (2016). Pathogenic variants in KCTD7 perturb neuronal K+ fluxes and glutamine transport. Brain.  ISSN 0006-8950.  139, s 3109- 3120 . doi: 10.1093/brain/aww244
  • Morland, Cecilie; Pettersen, Mi Nguyen & Hassel, Bjørnar (2016). Hyperosmolar sodium chloride is toxic to cultured neurons and causes reduction of glucose metabolism and ATP levels, an increase in glutamate uptake, and a reduction in cytosolic calcium. Neurotoxicology.  ISSN 0161-813X.  54, s 34- 43 . doi: 10.1016/j.neuro.2016.03.005
  • Watne, Leiv Otto; Idland, Ane-Victoria; Fekkes, Durk; Ræder, Johan; Frihagen, Frede Jon; Ranhoff, Anette Hylen; Chaudhry, Farrukh Abbas; Engedal, Knut; Wyller, Torgeir Bruun & Hassel, Bjørnar (2016). Increased CSF levels of aromatic amino acids in hip fracture patients with delirium suggests higher monoaminergic activity. BMC Geriatrics.  ISSN 1471-2318.  16(149) . doi: 10.1186/s12877-016-0324-0 Full text in Research Archive.
  • Dahlberg, Daniel; Ivanovic, Jugoslav; Mariussen, Espen & Hassel, Bjørnar (2015). High extracellular levels of potassium and trace metals in human brain abscess. Neurochemistry International.  ISSN 0197-0186.  82, s 28- 32 . doi: 10.1016/j.neuint.2015.02.003
  • Dahlberg, Daniel; Mariussen, Espen; Goverud, Ingeborg Løstegaard; Tonjum, Tone; Mæhlen, Jan; Antal, Ellen-Ann & Hassel, Bjørnar (2015). Staphylococcal α-hemolysin is neurotoxic and causes lysis of brain cells in vivo and in vitro. Neurotoxicology.  ISSN 0161-813X.  48, s 61- 67 . doi: 10.1016/j.neuro.2015.03.001
  • Hassel, Bjørnar; Elsais, Ahmed; Frøland, Anne-Sofie; Taubøll, Erik; Gjerstad, Leif; Quan, Yi; Dingledine, Raymond & Rise, Frode (2015). Uptake and metabolism of fructose by rat neocortical cells in vivo and by isolated nerve terminals in vitro. Journal of Neurochemistry.  ISSN 0022-3042.  133(4), s 572- 581 . doi: 10.1111/jnc.13079
  • Solyga, Volker; Western, Elin; Solheim, Hanne; Hassel, Bjørnar & Kerty, Emilia (2015). Posterior kortikal atrofi. Tidsskrift for Den norske legeforening.  ISSN 0029-2001.  135(10), s 949- 952 . doi: 10.4045/tidsskr.14.1127
  • Dahlberg, Daniel; Ivanovic, Jugoslav & Hassel, Bjørnar (2014). High extracellular concentration of excitatory amino acids glutamate and aspartate in human brain abscess. Neurochemistry International.  ISSN 0197-0186.  69(1), s 41- 47 . doi: 10.1016/j.neuint.2014.03.001
  • Hassel, Bjørnar; Dahlberg, Daniel; Mariussen, Espen; Goverud, Ingeborg Løstegaard; Antal, Ellen-Ann; Tonjum, Tone & Mæhlen, Jan (2014). Brain infection with Staphylococcus aureus leads to high extracellular levels of glutamate, aspartate, γ-aminobutyric acid, and zinc. Journal of Neuroscience Research.  ISSN 0360-4012.  92(12), s 1792- 1800 . doi: 10.1002/jnr.23444 Show summary
  • Hassel, Bjørnar (2013). Tetanus: Pathophysiology, Treatment, and the Possibility of Using Botulinum Toxin against Tetanus-Induced Rigidity and Spasms. Toxins.  ISSN 2072-6651.  5(1), s 73- 83 . doi: 10.3390/toxins5010073
  • Madslien, Elisabeth Henie; Rønning, Helene; Lindback, Toril; Hassel, Bjørnar; Andersson, M.A. & Granum, Per Einar (2013). Lichenysin is produced by most Bacillus licheniformis strains. Journal of Applied Microbiology.  ISSN 1364-5072.  115(4), s 1068- 1080 . doi: 10.1111/jam.12299
  • Hassel, Bjørnar (2012). 13C Magnetic Resonance Spectroscopy in Neurobiology - Its Use in Monitoring Brain Energy Metabolism and in Identifying Novel Metabolic Substrates and Metabolic Pathways. InTech.  ISSN 0192-303X. . doi: 10.5772/33095
  • Hassel, Bjørnar (2012). Hans (Hansemann) Tønnesen, en diagnostisk gåte fra Amalie Skram [A description of early hydrocephalus with macrocephaly, cerebral palsy, epilepsy, intellectual disability, and growth retardation by Norwegian novelist Amalie Skram (1846-1905)].. Tidsskrift for Den norske legeforening.  ISSN 0029-2001.  132, s 2632- 2635 . doi: 10.4045/tidsskr.12.0912
  • Zhou, Yun; Holmseth, Silvia; Guo, C; Hassel, Bjørnar; Höfner, G; Huitfeldt, Henrik; Wanner, KT & Danbolt, Niels Christian (2012). Deletion of the γ-aminobutyric acid transporter 2 (GAT2 and SLC6A13) gene in mice leads to changes in liver and brain taurine contents. Journal of Biological Chemistry.  ISSN 0021-9258.  287(42), s 35733- 35746 . doi: 10.1074/jbc.M112.368175
  • Hassel, Bjørnar; Taubøll, Erik; Shaw, Renee; Gjerstad, Leif & Dingledine, Ray (2010). Region-specific changes in gene expression in rat brain after chronic treatment with levetiracetam or phenytoin. Epilepsia.  ISSN 0013-9580.  51(9), s 1714- 1720 . doi: 10.1111/j.1528-1167.2010.02545.x
  • Hassel, Bjørnar; Solyga, Volker & Lossius, Andreas (2008). High-affinity choline uptake and acetylcholine-metabolizing enzymes in CNS white matter. A quantitative study.. Neurochemistry International.  ISSN 0197-0186.  53, s 193- 198 . doi: 10.1016/j.neuint.2008.06.008
  • Hassel, Bjørnar; Tessler, S.; Faull, R. L. M. & Emson, P. C. (2008). Glutamate uptake is reduced in prefrontal cortex in Huntington's disease.. Neurochemical Research.  ISSN 0364-3190.  33, s 232- 237
  • Herrman, Helle; Brækhus, Anne; Aaserud, Olaf; Aukrust, Pål; Stubhaug, Audun & Hassel, Bjørnar (2008). Early treatment of tetanus-induced trismus with botulinum toxin A.. Anesthesia and Analgesia.  ISSN 0003-2999.  106, s 1591- 1591 . doi: 10.1213/ANE.0b013e31816a30f0
  • Bough, Kristopher J.; Paquet, Maryse; Pare, Jean-Francois; Hassel, Bjørnar; Smith, Youland; Hall, Randy A. & Dingledine, Raymond (2007). Evidence against enhanced glutamate transport in the anticonvulsant mechanism of the ketogenic diet. Epilepsy Research.  ISSN 0920-1211.  74(2-3), s 232- 236 . doi: 10.1016/j.eplepsyres.2007.03.002 Show summary
  • Henjum, Solveig & Hassel, Bjørnar (2007). High-affinity GABA uptake and GABA-metabolizing enzymes in pig forebrain white matter: A quantitative study. Neurochemistry International.  ISSN 0197-0186.  50(2), s 365- 370 . doi: 10.1016/j.neuint.2006.09.004 Show summary
  • Henjum, Solveig & Hassel, Bjørnar (2007). High-affinity glycine and glutamate transport in pig forebrain white and gray matter: A quantitative study. Neurochemistry International.  ISSN 0197-0186.  50(5), s 696- 702 . doi: 10.1016/j.neuint.2007.01.002 Show summary
  • Morland, Cecilie; Henjum, Solveig; Iversen, Evy Grini; Skrede, Knut Kristian & Hassel, Bjørnar (2007). Evidence for a higher glycolytic than oxidative metabolic activity in white matter of rat brain. Neurochemistry International.  ISSN 0197-0186.  50(5), s 703- 709
  • Nguyen, Nga H. T.; Gonzalez, Susan Villa & Hassel, Bjørnar (2007). Formation of glycerol from glucose in rat brain and cultured brain cells. Augmentation with kainate or ischemia.. Journal of Neurochemistry.  ISSN 0022-3042.  101, s 1694- 1700
  • Morland, Cecilie; Boldingh, Karen A; Iversen, Evy Grini & Hassel, Bjørnar (2004). Valproate is neuroprotective against malonate toxicity in rat striatum: an association with augmentation of high-affinity glutamate uptake. Journal of Cerebral Blood Flow and Metabolism.  ISSN 0271-678X.  24(11), s 1226- 1234

View all works in Cristin

  • Cordero, Patricia Reyes; Rise, Frode & Hassel, Bjørnar (2020). NMR and spectrophotometric investigations of D-glyceraldehyde metabolism via methylglyoxal. Show summary
  • Hassel, Bjørnar & Strisland, Frode (2019). Forstå hvordan jeg har det. Sensorteknologi for personer med sterkt begrensende kommunikasjonsevner. Show summary
  • Rogne, Ane G.; Dahlberg, Daniel; Udnæs, Eirin; Raudeberg, Rune; Sigurdardottir, Solrun & Hassel, Bjørnar (2019). Cognitive dysfunction in brain abscess patients is not attributable to beta-amyloid deposition.
  • Aarønæs, Lars; Hassel, Bjørnar; Rogne, Ane & Dahlberg, Daniel (2018, 13. desember). Puss kan gi hjerneskade. [Internett].
  • Hassel, Bjørnar (2018). Jakobs delirium og overbevisningens nevrobiologi, I: Jan C Frich; Are Brean & Espen Dietrichs (red.),  Hjernen og historien.  Det norske medicinske Selskab.  ISBN 978-82-92871-84-3.  14.  s 87 - 94
  • Hassel, Bjørnar (2018). Michelangelos David - et syndrome for fremtiden?, I: Jan C Frich; Are Brean & Espen Dietrichs (red.),  Hjernen og historien.  Det norske medicinske Selskab.  ISBN 978-82-92871-84-3.  17.  s 107 - 113
  • Hassel, Bjørnar (2018). Religiøs anatomi i hofteregionen, I: Jan C Frich; Are Brean & Espen Dietrichs (red.),  Hjernen og historien.  Det norske medicinske Selskab.  ISBN 978-82-92871-84-3.  15.  s 95 - 97
  • Zhou, Yun; Hassel, Bjørnar; Eid, Tore & Danbolt, Niels Christian (2018). Axon-terminals expressing EAAT2 (GLT-1; slc1a2) are common in the forebrain and not limited to the hippocampus.

View all works in Cristin

Published Oct. 15, 2015 2:48 PM - Last modified Oct. 18, 2017 1:09 PM