̽»¨¾«Ñ¡

Tobias Karlsson's group

Research interests have included monoamine neurons, development, growth factors, regeneration, aging, transplantation in the central nervous system, models for Parkinson’s disease and its treatment, models for spinal cord injury and treatment strategies, the roles of transcription factors in the nervous system, genetic risk factors for Parkinson’s disease, and the Nogo signaling system.

Research focus

We showed that transplantation of embryonic dopamine neurons can counteract Parkinson’s disease in an animal model, and demonstrated functional effects of a repair strategy for complete spinal cord injury in an adult mammal.

Overexpression of Nogo receptor 1 (NgR1) in forebrain neurons does not affect gross brain anatomy but inhibits the formation of dendritic spines.
To the left are shown ex vivo diffusion tensor imaging (DTI) to detect white matter tracts in control (top) and NgR1 overexpressing (bottom) brains. To the right are examples of Golgi-stained dendrites from control (left Golgi image) and NgR1 overexpressing (right Golgi image) animals. Shown are distal dendrites from neurons in the cingulate cortex. NgR1 overexpression causes significant alterations of mature spine densities and dendritic architecture in a brain-area specific manner. From Karlsson et al Cerebral Cortex 2016.

Present focus is aging, neurodegenerative diseases, particularly Parkinson’s disease, the role of the Nogo system in the formation of lasting memories and treatment strategies for spinal cord injury. We have recently found that oral treatment with the clinically used cancer drug Imatinib improves recovery in an animal model of traumatic spinal cord injury. Recent studies of the mtDNA mutator mouse have shown that maternally inherited mtDNA mutations can cause mild aging phenotypes and aggravate premature aging phenotypes in mice carrying mutated PolgA genes.

We have recently shown how several genes encoding proteins belonging to the nerve growth inhibitory Nogo signaling system are regulated to influence structural synaptic plasticity and the formation of lasting memories. Ongoing studies using transgenic animals aim at understanding molecular mechanisms behind the formation of lasting memories and causes of memory disorders, as seen e.g. in aging.

Overexpression of Nogo receptor 1 (NgR1) in forebrain neurons does not affect gross brain anatomy but inhibits the formation of dendritic spines.

Publications

Selected publications

  • Article: CEREBRAL CORTEX. 2016;26(4):1804-1817
    Karlsson TE; Smedfors G; Brodin ATS; Aberg E; Mattsson A; Hogbeck I; Wellfelt K; Josephson A; Brene S; Olson L
  • Article: CELL. 2015;162(6):1418-1430
    Panigrahi B; Martin KA; Li Y; Graves AR; Vollmer A; Olson L; Mensh BD; Karpova AY; Dudman JT
  • Article: NATURE. 2013;501(7467):412-415
    Ross JM; Stewart JB; Hagstrom E; Brene S; Mourier A; Coppotelli G; Freyer C; Lagouge M; Hoffer BJ; Olson L; Larsson N-G
  • Article: PLOS ONE. 2012;7(6):e38760
    Abrams MB; Nilsson I; Lewandowski SA; Kjell J; Codeluppi S; Olson L; Eriksson U
  • Article: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 2011;108(31):12937-12942
    Sterky FH; Lee S; Wibom R; Olson L; Larsson N-G

All publications from group members

  • Article: SLEEP. 2025;48(9):zsaf146
    Brodin ATS; Liesecke F; Spielbauer J; Karlsson TE
  • Journal article: SLEEP. 2025;:zsaf270
    Brodin ATS; Liesecke F; Spielbauer J; Karlsson TE
  • Journal article: CURRENT NEUROPHARMACOLOGY. 2025
    Glotfelty EJ; Karlsson TE; Tovar-y-Romo LB; Olson L; Harvey BK; Greig NH
  • Article: BRAIN BEHAVIOR AND IMMUNITY. 2024;121:43-55
    Spielbauer J; Glotfelty EJ; Sarlus H; Harris RA; Heijtz RD; Karlsson TE
  • Article: GLIA. 2023;71(10):2473-2494
    Glotfelty EJ; Hsueh S-C; Clayborne Q; Bedolla A; Kopp KO; Wallace T; Zheng B; Luo Y; Karlsson TE; McDevitt RA; Olson L; Greig NH
  • Article: CELLS. 2023;12(10):1367
    Glotfelty EJ; Tovar-y-Romo LB; Hsueh S-C; Tweedie D; Li Y; Harvey BK; Hoffer BJ; Karlsson TE; Olson L; Greig NH
  • Article: FRONTIERS IN SYNAPTIC NEUROSCIENCE. 2022;14:854160
    Brodin ATS; Gabulya S; Wellfelt K; Karlsson TE
  • Article: JOURNAL OF NEUROCHEMISTRY. 2021;159(5):867-886
    Li Y; Glotfelty EJ; Karlsson T; Fortuno LV; Harvey BK; Greig NH
  • Article: FRONTIERS IN SYNAPTIC NEUROSCIENCE. 2020;12:545854
    Arvidsson E; Gabulya S; Brodin AT; Karlsson TE; Olson L
  • Review: EXPERT OPINION ON INVESTIGATIONAL DRUGS. 2020;29(6):595-602
    Glotfelty EJ; Olson L; Karlsson TE; Li Y; Greig NH
  • Article: BRAIN SCIENCES. 2019;10(1):5
    Smedfors G; Liesecke F; Ran C; Olson L; Karlsson TE; Belin AC
  • Article: ACS PHARMACOLOGY AND TRANSLATIONAL SCIENCE. 2019;2(2):66-91
    Glotfelty EJ; Delgado TE; Tovar-y-Romo LB; Luo Y; Hoffer BJ; Olson L; Karlsson TE; Mattson MP; Harvey BK; Tweedie D; Li Y; Greig NH
  • Article: JOURNAL OF NEUROTRAUMA. 2019;36(7):1054-1059
    Lai J-H; Karlsson TE; Wu JC-C; Huang C-Z; Chen Y-H; Kang S-J; Brodin ATS; Hoffer BJ; Olson L; Chiang Y-H; Chen K-Y
  • Article: FRONTIERS IN MOLECULAR NEUROSCIENCE. 2018;11:42
    Smedfors G; Olson L; Karlsson TE
  • Article: FRONTIERS IN MOLECULAR NEUROSCIENCE. 2017;10:94
    Karlsson TE; Wellfelt K; Olson L
  • Article: CEREBRAL CORTEX. 2016;26(4):1804-1817
    Karlsson TE; Smedfors G; Brodin ATS; Aberg E; Mattsson A; Hogbeck I; Wellfelt K; Josephson A; Brene S; Olson L
  • Article: PLOS ONE. 2013;8(11):e78778
    Nordgren M; Karlsson T; Svensson M; Koczy J; Josephson A; Olson L; Tingstroem A; Brene S
  • Article: PLOS ONE. 2013;8(4):e60892
    Karlsson TE; Koczy J; Brene S; Olson L; Josephson A
  • Article: JOURNAL OF ALZHEIMERS DISEASE. 2012;33(1):145-155
    Karlsson TE; Karlen A; Olson L; Josephson A
  • Doctoral thesis: 2012
    Karlsson T
  • Article: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 2009;106(48):20476-20481
    Karlen A; Karlsson TE; Mattsson A; Lundstromer K; Codeluppi S; Pham TM; Backman CM; Ogren SO; Aberg E; Hoffman AF; Sherling MA; Lupica CR; Hoffer BJ; Spenger C; Josephson A; Brene S; Olson L
  • Article: STEM CELLS. 2007;25(6):1539-1545
    Falk A; Karlsson TE; Kurdija S; Frisen J; Zupicich J
  • Show more

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̽»¨¾«Ñ¡ Campus Solna
Biomedicum, Quarter 7D
Solnavägen 9, SE-171 65 Stockholm

̽»¨¾«Ñ¡, Biomedicum, Solnavägen 9

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Keywords:
Cell and Molecular Biology Neurology Neurosciences
Content reviewer:
04-09-2025