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  • 1.
    Bakalkin, Georgy
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Watanabe, Hiroyuki
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Kononenko, Olga
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Immunology, Genetics and Pathology, Medicinsk genetik och genomik.
    Stålhandske, Lada
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Marklund, Niklas
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neurosurgery.
    TBI induced spinal cord plasticity: The endogenous opioid system mediates trauma effects on motor reflexes2016In: Brain Injury, ISSN 0269-9052, E-ISSN 1362-301X, Vol. 30, no 5-6, p. 712-712Article in journal (Other academic)
  • 2.
    Bazov, Igor
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Sarkisyan, Daniil
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Kononenko, Olga
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Watanabe, Hiroyuki
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Taqi, Malik Mumtaz
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences. Faculty of Medicine, NORMENT, University of Oslo, Oslo, Norway.
    Stålhandske, Lada
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Verbeek, Dineke S
    Department of Genetics, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands.
    Mulder, Jan
    Department of Neuroscience, Science for Life Laboratory, Karolinska Institute, Stockholm, Sweden.
    Rajkowska, Grazyna
    Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, Jackson, MS, USA.
    Sheedy, Donna
    Discipline of Pathology, Sydney Medical School, University of Sydney, Sydney NSW, Australia.
    Kril, Jillian
    Discipline of Pathology, Sydney Medical School, University of Sydney, Sydney NSW, Australia.
    Sun, Xueguang
    Zymo Research Corporation, 17062 Murphy Avenue, Irvine, CA, USA; Division of Human Genetics, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA.
    Syvänen, Ann-Christine
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Molecular Medicine. Uppsala University, Science for Life Laboratory, SciLifeLab.
    Yakovleva, Tatiana
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Bakalkin, Georgy
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Neuronal Expression of Opioid Gene is Controlled by Dual Epigenetic and Transcriptional Mechanism in Human Brain2018In: Cerebral Cortex, ISSN 1047-3211, E-ISSN 1460-2199, Vol. 28, no 9, p. 3129-3142Article in journal (Refereed)
    Abstract [en]

    Molecular mechanisms that define patterns of neuropeptide expression are essential for the formation and rewiring of neural circuits. The prodynorphin gene (PDYN) gives rise to dynorphin opioid peptides mediating depression and substance dependence. We here demonstrated that PDYN is expressed in neurons in human dorsolateral prefrontal cortex (dlPFC), and identified neuronal differentially methylated region in PDYN locus framed by CCCTC-binding factor binding sites. A short, nucleosome size human-specific promoter CpG island (CGI), a core of this region may serve as a regulatory module, which is hypomethylated in neurons, enriched in 5-hydroxymethylcytosine, and targeted by USF2, a methylation-sensitive E-box transcription factor (TF). USF2 activates PDYN transcription in model systems, and binds to nonmethylated CGI in dlPFC. USF2 and PDYN expression is correlated, and USF2 and PDYN proteins are co-localized in dlPFC. Segregation of activatory TF and repressive CGI methylation may ensure contrasting PDYN expression in neurons and glia in human brain.

  • 3.
    Kononenko, Olga
    et al.
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Watanabe, Hiroyuki
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Stålhandske, Lada
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Zarelius, Ann
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Clausen, Fredrik
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neurosurgery.
    Yakovleva, Tatiana
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Bakalkin, Georgy
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Biosciences.
    Marklund, Niklas
    Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience, Neurosurgery. Lund Univ, Dept Clin Sci Neurosurg, Skane Univ Hosp, EA Blocket,4th Floor,Box 188, S-22100 Lund, Sweden.
    Focal traumatic brain injury induces neuroplastic molecular responses in lumbar spinal cord2019In: Restorative Neurology and Neuroscience, ISSN 0922-6028, E-ISSN 1878-3627, Vol. 37, no 2, p. 87-96Article in journal (Refereed)
    Abstract [en]

    Background/Objectives: Motor impairment induced by traumatic brain injury (TBI) may be mediated through changes in spinal molecular systems regulating neuronal plasticity. We assessed whether a focal controlled cortical impact (CCI) TBI in the rat alters expression of the Tgfb1, c-Fos, Bdnf and Gap43 neuroplasticity genes in lumbar spinal cord.

    Approach/Methods: Adult male Sprague-Dawley rats (n = 8) were subjected to a right-side CCI over the anterior sensorimotor hindlimb representation area or sham-injury (n=8). Absolute expression levels of Tgfb1, c-Fos, Bdnf, and Gapd43 genes were measured by droplet digital PCR in ipsi- and contralesional, dorsal and ventral quadrants of the L4 and L5 spinal cord. The neuronal activity marker c-Fos was analysed by immunohistochemistry in the dorsal L4 and L5 segments. The contra- vs. ipsilesional expression pattern was examined as the asymmetry index, AI.

    Results: The Tgfb1 mRNA levels were significantly higher in the CCI vs. sham-injured rats, and in the contra- vs. ipsilesional dorsal domains in the CCI group. The number of c-Fos-positive cells was elevated in the L4 and L5 segments; and on the contralesional compared to the ipsilesional side in the CCI group. The c-Fos AI in the dorsal laminae was significantly increased by CCI.

    Conclusions: The results support the hypothesis that focal TBI induces plastic alterations in the lumbar spinal cord that may contribute to either motor recovery or maladaptive motor responses.

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