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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)
DOI: https://doi.org/10.15407/fz

Fiziologichnyi Zhurnal

is a scientific journal issued by the

Bogomoletz Institute of Physiology
National Academy of Sciences of Ukraine

Editor-in-chief: V.F. Sagach

The journal was founded in 1955 as
1955 – 1977 "Fiziolohichnyi zhurnal" (ISSN 0015 – 3311)
1978 – 1993 "Fiziologicheskii zhurnal" (ISSN 0201 – 8489)
1994 – 2016 "Fiziolohichnyi zhurnal" (ISSN 0201 – 8489)
2017 – "Fiziolohichnyi zhurnal" (ISSN 2522-9028)

Fiziol. Zh. 2013; 59(6): 88-97

Involvement of transcriptional factor induced by hypoxia in the neuronal mechanisms of adaptation to psychoemotional and hypoxic stress

Rybnikova EA1, Baranova KA1, Glushchenko TS1, Vetrovoĭ OV1, Sidorova MV1, Portnichenko VI2

  1. Pavlov Institute of Physiology, RAS, St. Petersburg, Russia
  2. International Centre for Astronomical, Medical and Ecological Research, NAS of Ukraine, Kyiv, Ukraine
DOI: https://doi.org/10.15407/fz59.06.088


Abstract

Using quantitative immunohistochemistry, neuronal expression of alpha-subunit of the transcriptional factor HIF-1 in hippocampus and neocortex of rats in response to pathogenic psychoemotional (model of posttraumatic stress disorder, PTSD) and hypoxic (severe hypobaric hypoxia, 180 Torr, 3 h), as well as to neuroprotective exposures to hypoxic pre- and postconditioning has been studied. Elongated overexpression of HIF-1alpha in hippocampus and neocortex of rats in response to the psychoemotional stress in PTSD paradigm, but not hypoxic stress, has been observed. Hypoxic pre- and postconditioning with mild hypobaric hypoxia (360 Torr, 2 h, 3 trials spaced at 24 h), those induced adaptation to the psychoemotional stress, abolished the elongated HIF-1alpha overexpression. Hypoxic postconditioning which improved structure and functional rehabilitation following severe hypoxic stress up-regulated HIF-1alpha expression in the brain neurons of rats survived severe hypoxia. The findings indicate that transcription factor HIF-1 is particularly involved in the processes of adaptation/ maladaptation to the action of injurious stresses, but its role depends upon the nature of stressor.

Keywords: hypoxia-inducible factor HIF-1a, brain, psychoemotionalstress, hypoxic stress, adaptation, hypoxicpreconditioning, hypoxic postconditioning.

Full text: (PDF, in Russian)

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