Altered expression of genes involved in brain energy metabolism as adaptive responses in rats exposed to chronic variable stress; changes in cortical level of glucogenic and neuroactive amino acids

  • Authors:
    • Mariola Herbet
    • Dorota Natorska‑Chomicka
    • Agnieszka Korga
    • Marta Ostrowska
    • Magdalena Izdebska
    • Monika Gawrońska‑Grzywacz
    • Iwona Piątkowska‑Chmiel
    • Kamil Pawłowski
    • Brygida Ślaska
    • Ewa Poleszak
    • Jarosław Dudka
  • View Affiliations

  • Published online on: January 15, 2019     https://doi.org/10.3892/mmr.2019.9865
  • Pages: 2386-2396
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Abstract

Brain metabolism is closely associated with neuronal activity and enables the accurate synthesis and function of neurotransmitters. Although previous studies have demonstrated that chronic stress is associated with the overproduction of reactive oxygen species (ROS), which leads to oxidative stress and the disruption of glucose metabolism, the molecular mechanisms and cerebral gluconeogenesis in depression have not yet been completely elucidated. In order to examine this subject, the present study evaluated changes in the expression of selected genes involved in the glycolytic pathway and the levels of glucogenic and neuroactive amino acids in the brain of rats exposed to chronic variable stress. Male Wistar rats (50‑55 days old, weighing 200‑250 g) were divided into two groups: control and stressed, and the rats in the stressed group were exposed to stress conditions for 40 days. Depressive‑like states were observed and recorded by measuring the body weight and forced swim test (FST). The mRNA levels of Slc2a3 (coding GLUT3) and Tfam (activator of mitochondrial transcription and a participant in mitochondrial genome replication) were markedly increased, while a decrease in the expression of Ldhb and GAPDH was also observed. These modifications were associated with the redirection of glucose metabolism to appropriate defensive pathways under chronic stress conditions, and an increased ability to maintain mitochondrial function as potential adaptive responses. A marked reduction of glucogenic and neuroactive amino acids levels indicate the support of energy metabolism by stimulation of the gluconeogenesis pathway. The findings of the present study provide a novel insight into the molecular and biochemical events that impact the development of depression under chronic stress conditions, and they may identify novel targets for therapeutic intervention.
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March-2019
Volume 19 Issue 3

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Herbet M, Natorska‑Chomicka D, Korga A, Ostrowska M, Izdebska M, Gawrońska‑Grzywacz M, Piątkowska‑Chmiel I, Pawłowski K, Ślaska B, Poleszak E, Poleszak E, et al: Altered expression of genes involved in brain energy metabolism as adaptive responses in rats exposed to chronic variable stress; changes in cortical level of glucogenic and neuroactive amino acids. Mol Med Rep 19: 2386-2396, 2019.
APA
Herbet, M., Natorska‑Chomicka, D., Korga, A., Ostrowska, M., Izdebska, M., Gawrońska‑Grzywacz, M. ... Dudka, J. (2019). Altered expression of genes involved in brain energy metabolism as adaptive responses in rats exposed to chronic variable stress; changes in cortical level of glucogenic and neuroactive amino acids. Molecular Medicine Reports, 19, 2386-2396. https://doi.org/10.3892/mmr.2019.9865
MLA
Herbet, M., Natorska‑Chomicka, D., Korga, A., Ostrowska, M., Izdebska, M., Gawrońska‑Grzywacz, M., Piątkowska‑Chmiel, I., Pawłowski, K., Ślaska, B., Poleszak, E., Dudka, J."Altered expression of genes involved in brain energy metabolism as adaptive responses in rats exposed to chronic variable stress; changes in cortical level of glucogenic and neuroactive amino acids". Molecular Medicine Reports 19.3 (2019): 2386-2396.
Chicago
Herbet, M., Natorska‑Chomicka, D., Korga, A., Ostrowska, M., Izdebska, M., Gawrońska‑Grzywacz, M., Piątkowska‑Chmiel, I., Pawłowski, K., Ślaska, B., Poleszak, E., Dudka, J."Altered expression of genes involved in brain energy metabolism as adaptive responses in rats exposed to chronic variable stress; changes in cortical level of glucogenic and neuroactive amino acids". Molecular Medicine Reports 19, no. 3 (2019): 2386-2396. https://doi.org/10.3892/mmr.2019.9865