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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)

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. 2015; 61(6): 104-113


R.D. Ostapiv1,2, V.V. Manko1

  1. Ivan Franko National University of Lviv;
  2. State Scientific Controlling Institute of Veterinary Medical Products and Feed Additives, Lviv


Taurine – sulphur-containing amino acid is a necessary component of mitochondrial matrix, where it maintains pH and is included in mitochondrial transport RNA. But still it is unclear how taurine influences on ATP synthesis and mitochondrial respiration chain components activity. Thus, the aim of the work was to study the effect of long-term per oral taurine injection on mitochondrial respiration intensity in rat tissues: liver, brain, testes and thigh muscle. For this purpose male Wistar rats, that weighted 190–220 g, were divided in three groups, daily during 28 days they were injected drinking water (control group) or taurine solution 40 and 100 mg per kg of body weight (І and ІІ research groups, correspondingly). Respiration intensity was measured polarogrifically with use of Clark electrode at endogenic substrates oxidation (V1), with exogenic α-ketoglutarate (5 mmol/l) or succinate (1 mmol/l;VS 4 ) addition, at ADP addition to concentration 200 µmol/l (V3), and after ADP depletion (V4 АТP ). Phosphorylation time, oxidative phosphorilation efficacy (АDP/О), respiratory controls by Lardy (V3/VS 4 ) and Chance (V3/ V4 АТP ) were calculated. It was found that long term taurine injection increased V1 in animal brain and liver of both research groups, but it decreased in testes and muscles of I research group. In liver of I research group animals, when both α-ketoglutarate and succinate were oxidated, VS 4 , V3 and V4 АТP were 4–7 times larger than in control. At the same time, Lardy respiratory control increased at succinate oxidation, this may indirectly point on increased coupling between respiration and oxidative phosphorylation. In liver of II research group animals VS 4 , V3 and V4 АТP when α-ketoglutarate was oxidated were significantly higher than in control. In muscles of I research group VS 4 , V3 and V4 АТP when α-ketoglutarate and succinate was added were lower than in control. In thigh muscle of II research group animals at α-ketoglutarate oxidation V3 was higher than in control. When succinate was added VS 4 and V4 АТP increased in testes mitochondria of both research groups and in brain of I research group. But in II research group animals mitochondria VS 4 brain was lower than in control. At the same time, coupling between respiration and oxidative phosphorylation in brain was on control level, in testes of I research group it was lower. In testes of II research group animals at α-ketoglutarate addition increased respiratory controls. Thus, the effect of long term per oral taurine injection on mitochondria respiration intensity is dose-dependent and tissue-specific and, obviously, has different significance and is implemented by different mechanisms.

Keywords: taurine; mitochondrial respiration intensity; liver; brain; testes; thigh muscle.


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