Lasse Kristoffer Bak

Lasse Kristoffer Bak

Guest Researcher, Professor

ORCID: 0000-0003-0784-7864

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  1. Published

    Characterization of energy and neurotransmitter metabolism in cortical glutamatergic neurons derived from human induced pluripotent stem cells: A novel approach to study metabolism in human neurons

    Aldana, Blanca, Zhang, Y., Lihme, M. F., Bak, Lasse Kristoffer, Nielsen, Jørgen Erik, Holst, B., Hyttel, P., Freude, Kristine & Waagepetersen, Helle S., 2017, In: Neurochemistry International. 106, p. 48-61

    Research output: Contribution to journal › Journal article › Research › peer-review

  2. Published

    Extensive astrocyte metabolism of γ-aminobutyric acid (GABA) sustains glutamine synthesis in the mammalian cerebral cortex

    Andersen, Jens Velde, Jakobsen, Emil, Westi, Emil Winther, Lie, M. E. K., Voss, C. M., Aldana, Blanca, Schousboe, Arne, Wellendorph, Petrine, Bak, Lasse Kristoffer, Pinborg, Lars Hageman & Waagepetersen, Helle S., 2020, In: Glia. 68, 12, p. 2601-2612

    Research output: Contribution to journal › Journal article › Research › peer-review

  3. Published

    Compartmentalised signalling-metabolism coupling in brain cells - putative drug targets for neurological diseases?

    Bak, Lasse Kristoffer, Christiansen, Ann-Kathrin Lindahl, Kjaer, C., Jakobsen, Emil, Hedehus, J., Mertz, C., Madsen, S., Jensen, M., Bergstedt, N., Knezevic, A. & Lindholm, S., Aug 2017, In: Journal of Neurochemistry. 142, S1, p. 145-145

    Research output: Contribution to journal › Conference abstract in journal › Research › peer-review

  4. 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 journal › Conference abstract in journal › Research › peer-review

  5. Published

    CrossTalk opposing view: lack of evidence supporting an astrocyte-to-neuron lactate shuttle coupling neuronal activity to glucose utilisation in the brain

    Bak, Lasse Kristoffer & Walls, Anne Byriel, 1 Feb 2018, In: The Journal of Physiology. 596, 3, p. 351-353 3 p.

    Research output: Contribution to journal › Comment/debate › Research › peer-review

  6. Published

    Astrocytic glycogen metabolism in the healthy and diseased brain

    Bak, Lasse Kristoffer, Walls, Anne Byriel, Schousboe, Arne & Waagepetersen, Helle S., 11 May 2018, In: The Journal of Biological Chemistry. 293, 19, p. 7108-7116 9 p.

    Research output: Contribution to journal › Review › Research › peer-review

  7. 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 journal › Journal article › Research › peer-review

  8. 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 journal › Journal article › Research › peer-review

  9. Published

    Astrocytes take the stage in a tale of signaling-metabolism coupling

    Bak, Lasse Kristoffer, 2 Jun 2017, In: The Journal of Biological Chemistry. 292, 22, p. 9439-9440 2 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    Glucose is necessary to maintain neurotransmitter homeostasis during synaptic activity in cultured glutamatergic neurons

    Bak, Lasse Kristoffer, Schousboe, Arne, Sonnewald, U. & Waagepetersen, Helle S., Oct 2006, In: Journal of Cerebral Blood Flow and Metabolism. 26, 10, p. 1285-97 13 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  11. Published

    Activity of the lactate-alanine shuttle is independent of glutamate-glutamine cycle activity in cerebellar neuronal-astrocytic cultures

    Bak, Lasse Kristoffer, Sickmann, H. M., Schousboe, Arne & Waagepetersen, Helle S., 4 Dec 2004, In: Journal of Neuroscience Research. 79, 1-2, p. 88-96 9 p.

    Research output: Contribution to journal › Journal article › Research › peer-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 journal › Review › Research › peer-review

  13. 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 journal › Journal article › Research › peer-review

  14. Published

    Characterization of depolarization-coupled release of glutamate from cultured mouse cerebellar granule cells using DL-threo-beta-benzyloxyaspartate (DL-TBOA) to distinguish between the vesicular and cytoplasmic pools

    Bak, Lasse Kristoffer, Schousboe, Arne & Waagepetersen, Helle S., 14 May 2003, In: Neurochemistry International. 43, 4-5, p. 417-24 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  15. 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 journal › Comment/debate › Research › peer-review

  16. Published

    Complex glutamate labeling from [U-13C]glucose or [U-13C]lactate in co-cultures of cerebellar neurons and astrocytes

    Bak, Lasse Kristoffer, Waagepetersen, Helle S., Melø, T. M., Schousboe, Arne & Sonnewald, U., 2007, In: Neurochemical Research. 32, p. 671-680

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. 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 journal › Journal article › Research › peer-review

  18. 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 journal › Journal article › Research › peer-review

  19. Published

    Brain energy and ammonia metabolism

    Bak, Lasse Kristoffer, Schousboe, Arne & Waagepetersen, Helle S., 2012, Functional molecular imaging in hepatology. Bentham Science Publishers, Vol. 1. p. 129-144 16 p.

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  20. 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 journal › Journal article › Research › peer-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 proceeding › Book chapter › Communication

  22. 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 journal › Journal article › Research › peer-review

  23. Published

    Glutamate and glutamine in brain disorders

    Bak, Lasse Kristoffer, Schousboe, Arne & Waagepetersen, Helle S., 2011, Neurochemical mechanisms in diseases. Blass, J. P. (ed.). New York: Springer Publishing Company, Vol. 1. p. 195-212 (Advances in Neurobiology).

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  24. Published

    Among the branched-chain amino acids, only valine metabolism is up-regulated in astrocytes during glutamate exposure

    Bak, Lasse Kristoffer, Johansen, M. L., Schousboe, Arne & Waagepetersen, Helle S., 2007, In: Journal of Neuroscience Research. 86, p. 3465-3470

    Research output: Contribution to journal › Journal article › Research › peer-review

  25. Published

    Brain energy and ammonia metabolism

    Bak, Lasse Kristoffer, Waagepetersen, Helle S. & Schousboe, Arne, 2011, Functional molecular imaging in hepatology. Bussum, The Netherlands: Bentham Science Publishers, p. 129-144

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

  26. 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 journal › Journal article › Research › peer-review

  27. 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 journal › Journal article › Research › peer-review

  28. 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 journal › Journal article › Research › peer-review

  29. Published

    Glutamine and ammonia in hepatic encephalopathy

    Dadsetan, S., Waagepetersen, Helle S., Schousboe, Arne & Bak, Lasse Kristoffer, 1 Jan 2015, Glutamine in Clinical Nutrition. Springer New York LLC, p. 219-227 9 p.

    Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research › peer-review

  30. 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 journal › Journal article › Research › peer-review

  31. 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 journal › Journal article › Research › peer-review

  32. Published

    Brain alanine formation as an ammonia-scavenging pathway during hyperammonemia: effects of glutamine synthetase inhibition in rats and astrocyte-neuron co-cultures

    Dadsetan, S., Kukolj, E., Bak, Lasse Kristoffer, Sørensen, M., Ott, P., Vilstrup, H., Schousboe, Arne, Keiding, S. & Waagepetersen, Helle S., Aug 2013, In: Journal of Cerebral Blood Flow and Metabolism. 33, 8, p. 1235-41 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. Published

    Branched-chain amino acids increase arterial blood ammonia in spite of enhanced intrinsic muscle ammonia metabolism in patients with cirrhosis and healthy subjects

    Dam, G., Keiding, S., Munk, O. L., Ott, P., Buhl, M., Vilstrup, H., Bak, Lasse Kristoffer, Waagepetersen, Helle S., Schousboe, Arne, Møller, N. & Sørensen, M., 1 Aug 2011, In: American Journal of Physiology: Gastrointestinal and Liver Physiology. 301, 2, p. G269-77

    Research output: Contribution to journal › Journal article › Research › peer-review

  34. 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 journal › Comment/debate › Research › peer-review

  35. Published

    Hepatic encephalopathy is associated with decreased cerebral oxygen metabolism and blood flow, not increased ammonia uptake

    Dam, G., Keiding, S., Munk, O. L., Ott, P., Vilstrup, H., Bak, Lasse Kristoffer, Waagepetersen, Helle S., Schousboe, Arne & Sørensen, M., Jan 2013, In: Hepatology. 57, 1, p. 258-65 8 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  36. 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 proceeding › Book chapter › Research › peer-review

  37. Published

    Effect of glutamine synthetase inhibition on brain and interorgan ammonia metabolism in bile duct ligated rats

    Fries, A. W., Dadsetan, S., Keiding, S., Bak, Lasse Kristoffer, Schousboe, Arne, Waagepetersen, Helle S., Simonsen, M., Ott, P., Vilstrup, H. & Sørensen, M., Mar 2014, In: Journal of Cerebral Blood Flow and Metabolism. 34, 3, p. 460-6 7 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  38. Published

    Glucose, Lactate and Glutamine but not Glutamate Support Depolarization-Induced Increased Respiration in Isolated Nerve Terminals

    Hohnholt, M. C., Andersen, V. H., Bak, Lasse Kristoffer & Waagepetersen, Helle S., 2017, In: Neurochemical Research. 42, 1, p. 191-201 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  39. 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 journal › Journal article › Research › peer-review

  40. 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 journal › Journal article › Research › peer-review

  41. 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 conference › Poster › Research

  42. 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 journal › Journal article › Research › peer-review

  43. Published

    Glycogen Shunt Activity and Glycolytic Supercompensation in Astrocytes May Be Distinctly Mediated via the Muscle Form of Glycogen Phosphorylase

    Jakobsen, Emil, Bak, Lasse Kristoffer, Walls, Anne Byriel, Christiansen, Ann-Kathrin Lindahl, Schousboe, Arne & Waagepetersen, Helle S., Sep 2017, In: Neurochemical Research. 42, 9, p. 2490-2494 5 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  44. 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 journal › Journal article › Research › peer-review

  45. 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 journal › Journal article › Research › peer-review

  46. 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 journal › Journal article › Research › peer-review

  47. 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 journal › Journal article › Research › peer-review

  48. 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 journal › Journal article › Research › peer-review

  49. 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 journal › Conference abstract in journal › Research

  50. Published

    Differential Expression of the β3 Subunit of Voltage-Gated Ca2+ Channel in Mesial Temporal Lobe Epilepsy

    Kjær, C., Palasca, Oana, Barzaghi, G., Bak, Lasse Kristoffer, Durhuus, R. K. J., Jakobsen, Emil, Pedersen, Louise, Bartels, Emil Daniel, Woldbye, David Paul Drucker, Pinborg, Lars Hageman & Jensen, Lars Juhl, 2023, In: Molecular Neurobiology. 60, p. 5755–5769

    Research output: Contribution to journal › Journal article › Research › peer-review

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