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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. 2012; 58(4): 3-12

Phase changes in energy metabolism during periodic hypoxia

Portnichenko VI, Nosar' VI, Portnichenko AG, Drevitskaia TI, Sidorenko AM, Man'kovskaia IN.

  1. International Centre for Astronomical, Medical and Ecological Research, NAS of Ukraine, Kyiv, Ukraine
  2. O.O.Bogomoletz Institute of Physiology, NAS of Ukraine, Kyiv, Ukraine


Male Wistar rats were exposed to periodic hypobaric hypoxia (PHH), by “lifting” in barochamber at “altitude” 5600 m for 1 h every 3 days (6 s?ances). The dynamics of changes in oxygen consumption (VO2), and body temperature (Tm), as well as in HIF-1a and HIF-3a gene expression, and mitochondrial respiration in the ventricles of the heart was studied. On the basis of the data we identifed four phases of the physiological changes. The frst phase, hypometabolic (1-3 seances), is characterized by decrease in VO2 and Tm, induction of HIF-1a and HIF-3a with delayed transient stimulation of metabolism in response to each seance of hypoxia. In heart mitochondria, V3 and V4 are increased, but V3/V4 and ADP/O are reduced. During the second phase, transitional (3-4 seances), there is reorganization of metabolism and decrease its hypoxic reactivity. The third phase, hypermetabolic (4-5 seances), is characterized by intensifcation of metabolism and compensation of hypoxic disorders. The fourth phase (after 5 seance) – is a state of metabolic adaptation with normalization of VO2 and Tm, expression of HIF-1a and HIF-3a, mitochondrial respiration, increased NAD-dependent oxidation of carbohydrate and lipid substrates. Thus, during PHH consequent rebuilding of processes of oxygen transport, tissue respiration and thermogenesis occurs, mediated by induction of the HIF subunits.

Keywords: periodic hypoxia, mitochondria, HIF-1a , HIF-3a, hypometabolic state, oxygen consumption.


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