Lasse Kristoffer Bak

Lasse Kristoffer Bak

Guest Researcher, Professor


  1. Published

    Impairment of the organization of locomotor and exploratory behaviors in bile duct-ligated rats

    Leke, R., de Oliveira, D. L., Mussulini, B. H. M., Pereira, M. S., Kazlauckas, V., Mazzini, G., Hartmann, C. R., Silveira, T. R., Simonsen, M., Bak, Lasse Kristoffer, Waagepetersen, Helle S., Keiding, S., Schousboe, Arne & Portela, L. V., 2012, In: P L o S One. 7, 5, p. e36322

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Published

    Inhibition of glutamine synthesis induces glutamate dehydrogenase-dependent ammonia fixation into alanine in co-cultures of astrocytes and neurons

    Dadsetan, S., Bak, Lasse Kristoffer, Sørensen, M., Keiding, S., Vilstrup, H., Ott, P., Leke, R., Schousboe, Arne & Waagepetersen, Helle S., 1 Sep 2011, In: Neurochemistry International. 59, 4, p. 482-8 7 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Published

    Inhibition of soluble adenylyl cyclase (SAC) causes a robust increase in glycolysis in cultured astrocytes

    Jakobsen, Emil, Madsen, S. F., Hedehus, J., Rubio-Villena, C., Jorgensen, N. H. & Bak, Lasse Kristoffer, Aug 2017, p. 147-147.

    Research output: Contribution to conferencePosterResearch

  4. Published

    Interorgan metabolism of ornithine phenylacetate (OP)-A novel strategy for treatment of hyperammonemia

    Dadsetan, S., Sørensen, M., Bak, Lasse Kristoffer, Vilstrup, H., Ott, P., Schousboe, Arne, Jalan, R., Keiding, S. & Waagepetersen, Helle S., 2013, In: Biochemical Pharmacology. 85, 1, p. 115-23 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  5. Published
  6. Published

    Isoform-selective regulation of glycogen phosphorylase by energy deprivation and phosphorylation in astrocytes

    Müller, M. S., Pedersen, Sofie E., Walls, Anne Byriel, Waagepetersen, Helle S. & Bak, Lasse Kristoffer, Jan 2015, In: Glia. 63, 1, p. 154-62 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  7. Published

    Low Cerebral Oxygen Consumption and Blood Flow in Patients With Cirrhosis and an Acute Episode of Hepatic Encephalopathy

    Iversen, P., Bak, Lasse Kristoffer, Waagepetersen, Helle S., Vafaee, M. S., Borghammer, P., Mouridsen, K., Jensen, S. B., Vilstrup, H., Schousboe, Arne, Ott, P., Gjedde, Albert & Keiding, S., 2009, In: Gastroenterology. 136, 3, p. 863-871

    Research output: Contribution to journalJournal articleResearchpeer-review

  8. Published

    Low cerebral energy metabolism in hepatic encephalopathy reflects low neuronal energy demand. Role of ammonia-induced increased GABAergic tone

    Sorensen, M., Walls, Anne Byriel, Dam, G., Bak, Lasse Kristoffer, Andersen, Jens Velde, Ott, P., Vilstrup, H. & Schousboe, Arne, 2022, In: Analytical Biochemistry. 654, 4 p., 114766.

    Research output: Contribution to journalJournal articleResearchpeer-review

  9. Published

    Metabolic fate of isoleucine in a rat model of hepatic encephalopathy and in cultured neural cells exposed to ammonia

    Bak, Lasse Kristoffer, Iversen, P., Sørensen, M., Keiding, S., Vilstrup, H., Ott, P., Waagepetersen, Helle S. & Schousboe, Arne, 2009, In: Metabolic Brain Disease. 24, 1, p. 135-145

    Research output: Contribution to journalJournal articleResearchpeer-review

  10. Published

    Metabolic mapping of astrocytes and neurons in culture using stable isotopes and gas chromatography-mass spectrometry (GC-MS)

    Walls, Anne Byriel, Bak, Lasse Kristoffer, Sonnewald, U., Schousboe, Arne & Waagepetersen, Helle S., 1 Jan 2014, In: Neuromethods. 90, p. 73-105 33 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  11. Published

    Metabolism of [U-13C]glutamine and [U-13C]glutamate in isolated rat brain mitochondria suggests functional phosphate-activated glutaminase activity in matrix

    Bak, Lasse Kristoffer, Zieminska, E., Waagepetersen, Helle S., Schousboe, Arne & Albrecht, J., 2008, In: Neurochemical Research. 33, 2, p. 273-278

    Research output: Contribution to journalJournal articleResearchpeer-review

  12. Published

    Misconceptions regarding basic thermodynamics and enzyme kinetics have led to erroneous conclusions regarding the metabolic importance of lactate dehydrogenase isoenzyme expression

    Bak, Lasse Kristoffer & Schousboe, Arne, Nov 2017, In: Journal of Neuroscience Research. 95, 11, p. 2098-2102 5 p.

    Research output: Contribution to journalReviewResearchpeer-review

  13. Published

    Neuron-glia interactions in glutamatergic neurotransmission: roles of oxidative and glycolytic adenosine triphosphate as energy source

    Schousboe, Arne, Sickmann, H. M., Bak, Lasse Kristoffer, Schousboe, I., Jajo, F. S., Faek, S. A. A. & Waagepetersen, Helle S., 1 Dec 2011, In: Journal of Neuroscience Research. 89, 12, p. 1926-34 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  14. Published

    Neuronal Cell Death Induced by Mechanical Percussion Trauma in Cultured Neurons is not Preceded by Alterations in Glucose, Lactate and Glutamine Metabolism

    Jayakumar, A. R., Bak, Lasse Kristoffer, Rama Rao, K. V., Waagepetersen, Helle S., Schousboe, Arne & Norenberg, M. D., Feb 2016, In: Neurochemical Research. 41, 1, p. 307-15 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  15. Published

    Neuronal glucose but not lactate utilization is positively correlated with NMDA-induced neurotransmission and fluctuations in cytosolic Ca2+ levels

    Bak, Lasse Kristoffer, Walls, Anne Byriel, Schousboe, Arne, Ring, A., Sonnewald, U. & Waagepetersen, Helle S., 2009, In: Journal of Neurochemistry. 109, Suppl. 1, p. 87-93 7 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  16. Published

    Novel model of neuronal bioenergetics: postsynaptic utilization of glucose but not lactate correlates positively with Ca2+ signalling in cultured mouse glutamatergic neurons

    Bak, Lasse Kristoffer, Obel, L. L. F., Walls, Anne Byriel, Schousboe, Arne, Faek, S. A. A., Jajo, F. S. & Waagepetersen, Helle S., 2012, In: A S N Neuro. 4, 3, p. 151-160

    Research output: Contribution to journalJournal articleResearchpeer-review

  17. Published

    Oxidative metabolism of astrocytes is not reduced in hepatic encephalopathy: a PET study with [(11)C]acetate in humans

    Iversen, P., Mouridsen, K., Hansen, M. B., Jensen, S. B., Sørensen, M., Bak, Lasse Kristoffer, Waagepetersen, Helle S., Schousboe, Arne, Ott, P., Vilstrup, H., Keiding, S. & Gjedde, Albert, 2014, In: Frontiers in Neuroscience. 8, p. 353

    Research output: Contribution to journalJournal articleResearchpeer-review

  18. Published

    PARK2 Mutation Causes Metabolic Disturbances and Impaired Survival of Human iPSC-Derived Neurons

    Bogetofte, H., Jensen, P., Ryding, M., Schmidt, S. I., Okarmus, J., Ritter, L., Worm, C. S., Hohnholt, M. C., Azevedo, C., Roybon, L., Bak, Lasse Kristoffer, Waagepetersen, Helle S., Ryan, B. J., Wade-Martins, R., Larsen, M. R. & Meyer, M., 2019, In: Frontiers in Cellular Neuroscience. 13, 14 p., 297.

    Research output: Contribution to journalJournal articleResearchpeer-review

  19. Published

    Patient iPSC-derived neurons for disease modeling of frontotemporal dementia with mutation in CHMP2B

    Zhang, Y., Schmid, B., Qas Younan, N. K., Rasmussen, M. A., Garcia, B. I. A., Agger, M., Callø, K., Stummann, T. C., Larsen, H. M., Nielsen, T. T., Huang, J., Xu, F., Liu, X., Bolund, L., Meyer, M., Bak, L. K., Waagepetersen, H. S., Luo, Y., Nielsen, J. E., Consortium, T. FRA. & 4 others, Holst, B., Clausen, C., Hyttel, P. & Freude, Kristine, 2017, In: Stem Cell Reports. 8, 3, p. 648-658

    Research output: Contribution to journalJournal articleResearchpeer-review

  20. Published

    Pharmacological inhibition of mitochondrial soluble adenylyl cyclase in astrocytes causes activation of AMP-activated protein kinase and induces breakdown of glycogen

    Jakobsen, Emil, Andersen, Jens Velde, Christensen, S. K., Siamka, O., Larsen, M. R., Waagepetersen, Helle S., Aldana, Blanca & Bak, Lasse Kristoffer, 2021, In: Glia. 69, 12, p. 2828-2844 17 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  21. Published

    Planning and execution of a one-day PhD course employing the theory of didactical situations

    Bak, Lasse Kristoffer, 2010, Improving university science teaching and learning: pedagogical projects 2008. Voetmann Christiansen, F., Rump, C. & Degn, L. (eds.). Department of Science Education, University of Copenhagen, Vol. 1. p. 13-19 (Uden navn, Vol. 1).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterCommunication

  22. Published

    Potential role of adenylyl cyclase 8 signaling complexes in regulating insulin secretion from pancreatic beta cells

    Lønsmann, I. & Bak, Lasse Kristoffer, Aug 2020, In: Cellular Signalling. 72, 5 p., 109635.

    Research output: Contribution to journalReviewResearchpeer-review

  23. Published

    Primary cultures of astrocytes: their value in understanding astrocytes in health and disease

    Lange, S. C., Bak, Lasse Kristoffer, Waagepetersen, Helle S., Schousboe, Arne & Norenberg, M. D., Nov 2012, In: Neurochemical Research. 37, 11, p. 2569-88 20 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  24. Published

    Rebuttal from Lasse K. Bak and Anne B. Walls

    Bak, Lasse Kristoffer & Walls, Anne Byriel, 1 Feb 2018, In: The Journal of Physiology. 596, 3, p. 357

    Research output: Contribution to journalComment/debateResearchpeer-review

  25. Published

    Reduced cerebral blood flow and oxygen consumption in cirrhosis patients with acute hepatic encephalopathy

    Keiding, S., Iversen, P., Sørensen, M., Bak, Lasse Kristoffer, Waagepetersen, Helle S., Gjedde, A., Schousboe, Arne & Vilstrup, H., 2009, In: Journal of Neurochemistry. s1, p. 269-270

    Research output: Contribution to journalConference abstract in journalResearch

  26. Published

    Reply to letter to the editor by Zheng G et al. Venous blood ammonia can be associated with cerebral blood flow in hepatic encephalopathy

    Dam, G., Keiding, S., Munk, O. L., Ott, P., Vilstrup, H., Bak, Lasse Kristoffer, Waagepetersen, Helle S., Schousboe, Arne & Sørensen, M., 2013, In: Hepatology. 58, 2, p. 833-834

    Research output: Contribution to journalComment/debateResearchpeer-review

  27. Published

    Role of astrocytes in depolarization-coupled release of glutamate in cerebellar cultures

    Bak, Lasse Kristoffer, Waagepetersen, Helle S. & Schousboe, Arne, Jan 2004, In: Neurochemical Research. 29, 1, p. 257-65 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  28. Published

    Role of astrocytic transport processes in glutamatergic and GABAergic neurotransmission

    Schousboe, Arne, Sarup, A., Bak, Lasse Kristoffer, Waagepetersen, Helle S. & Larsson, O. M., Sep 2004, In: Neurochemistry International. 45, 4, p. 521-7 7 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  29. Role of branched chain amino acids in cerebral ammonia homeostasis related to hepatic encephalopathy

    Bak, Lasse Kristoffer, Waagepetersen, H. S., Sørensen, M., Ott, P., Vilstrup, H., Keiding, S. & Schousboe, A., Jun 2013, In: Metabolic Brain Disease. 28, 2, p. 209-15 7 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  30. Published

    Soluble adenylyl cyclase-mediated cAMP signaling and the putative role of PKA and EPAC in cerebral mitochondrial function

    Jakobsen, Emil, Lange, S. C. & Bak, Lasse Kristoffer, Aug 2019, In: Journal of Neuroscience Research. 97, 8, p. 1018-1038 21 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  31. Published

    State-Dependent Changes in Brain Glycogen Metabolism

    DiNuzzo, M., Walls, Anne Byriel, Öz, G., Seaquist, E. R., Waagepetersen, Helle S., Bak, Lasse Kristoffer, Nedergaard, Maiken & Schousboe, Arne, 2019, Brain Glycogen Metabolism. DiNuzzo, M. & Schousboe, A. (eds.). Springer, p. 269-309 41 p. (Advances in Neurobiology, Vol. 23).

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

  32. Published

    Synthesis of neurotransmitter GABA via the neuronal tricarboxylic acid cycle is elevated in rats with liver cirrhosis consistent with a high GABAergic tone in chronic hepatic encephalopathy

    Leke, R., Bak, Lasse Kristoffer, Iversen, P., Sørensen, M., Keiding, S., Vilstrup, H., Ott, P., Portela, L. V., Schousboe, Arne & Waagepetersen, Helle S., 1 Jun 2011, In: Journal of Neurochemistry. 117, 5, p. 824-32 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  33. Published

    The Glutamine-Glutamate/GABA Cycle: Function, Regional Differences in Glutamate and GABA Production and Effects of Interference with GABA Metabolism

    Walls, Anne Byriel, Waagepetersen, Helle S., Bak, Lasse Kristoffer, Schousboe, Arne & Sonnewald, U., Feb 2015, In: Neurochemical Research. 40, 2, p. 402-9 8 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  34. Published

    The Value of Example Solutions in Pharmacy Education: The role of seniority and gender.

    Sandelin, Albin Gustav, Hansen, H. R., Baldursdóttir, S. G., Kristensen, Anders Skov, Bak, Lasse Kristoffer, Christiansen, Frederik Voetmann & Selhuber-Unkel, C. J. M., 2011, In: Pharmacy Education. 11, 1, p. 32-37 6 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  35. Published

    The anticonvulsant action of the galanin receptor agonist NAX-5055 involves modulation of both excitatory- and inhibitory neurotransmission

    Walls, Anne Byriel, Flynn, S. P., West, P. J., Müller, M. S., Bak, Lasse Kristoffer, Bulaj, G., Schousboe, Arne & White, H. S., Mar 2016, In: Epilepsy Research. 121, p. 55-63 9 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  36. Published

    The glutamate/GABA-glutamine cycle: aspects of transport, neurotransmitter homeostasis and ammonia transfer

    Bak, Lasse Kristoffer, Schousboe, Arne & Waagepetersen, Helle S., Aug 2006, In: Journal of Neurochemistry. 98, 3, p. 641-53 13 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  37. Published

    The inhibitors of soluble adenylate cyclase 2-OHE, KH7, and bithionol compromise mitochondrial ATP production by distinct mechanisms

    Jakobsen, Emil, Lange, S. C., Andersen, Jens Velde, Desler, Claus, Kihl, H. F., Hohnholt, M., Stridh, M. H., Rasmussen, Lene Juel, Waagepetersen, Helle S. & Bak, Lasse Kristoffer, 2018, In: Biochemical Pharmacology. 155, p. 92-101 10 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  38. Published

    The metabolic role of isoleucine in detoxification of ammonia in cultured mouse neurons and astrocytes

    Johansen, M. L., Bak, Lasse Kristoffer, Schousboe, Arne, Iversen, P., Sørensen, M., Keiding, S., Vilstrup, H., Gjedde, A., Ott, P. & Waagepetersen, Helle S., 2007, In: Neurochemistry International. 50, p. 1042-1051

    Research output: Contribution to journalJournal articleResearchpeer-review

  39. Published

    The orphan transporter v7-3 (slc6a15) is a Na+-dependent neutral amino acid transporter (B0AT2)

    Bröer, A., Tietze, N., Kowalczuk, S., Chubb, S., Munzinger, M., Bak, Lasse Kristoffer & Bröer, S., 1 Jan 2006, In: Biochemical Journal. 393, Pt 1, p. 421-30 10 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  40. Published

    Transcriptome analysis in patients with temporal lobe epilepsy

    Kjær, C., Barzaghi, G., Bak, Lasse Kristoffer, Goetze, Jens P. , Yde, C. W., Woldbye, David Paul Drucker, Pinborg, Lars Hageman & Jensen, Lars Juhl, 2019, In: Brain. 142, 10, p. 49-64 16 p., e55.

    Research output: Contribution to journalLetterResearchpeer-review

  41. Published

    Two isoforms of glycogen phosphorylase activated by the same signaling trains: how and why?

    Bak, Lasse Kristoffer, Mueller, M. S., Fox, R., Pedersen, Sofie E., Walls, Anne Byriel, Christiansen, Ann-Kathrin Lindahl, Jakobsen, E., Schousboe, Arne & Waagepetersen, Helle S., Aug 2015, In: Journal of Neurochemistry. 134, suppl. 1, p. 56-56 1 p., S26-01.

    Research output: Contribution to journalConference abstract in journalResearchpeer-review

  42. Published

    Valine but not leucine or isoleucine supports neurotransmitter glutamate synthesis during synaptic activity in cultured cerebellar neurons

    Bak, Lasse Kristoffer, Johansen, M. L., Schousboe, Arne & Waagepetersen, Helle S., 2012, In: Journal of Neuroscience Research. 90, 9, p. 1768-75 8 p.

    Research output: Contribution to journalJournal articleResearchpeer-review

  43. Published

    Yield and Integrity of RNA from Brain Samples are Largely Unaffected by Pre-analytical Procedures

    Jensen, P. S. H., Johansen, M., Bak, Lasse Kristoffer, Jensen, Lars Juhl & Kjær, C., 2021, In: Neurochemical Research. 46, p. 447-454

    Research output: Contribution to journalJournal articleResearchpeer-review

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