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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. 2006; 52(5): 12-20

The effectsof ?-linolenic acid on the functioning isolated heart during ischemia/reperfusion

Т.V. Кuкоbа, А. М. Shysh, А.А. Моybеnkо, А.V.Коtsyuruba, О.V.Kcharchenko

    О.О.Bogomoletz Institute of Physiology, National Academyof Sciences of Ukraine, Kyiv.Institute of Bioogranic Chemistry and Petrochemistry,National Academy of Sciences of Ukraine, Kyiv



Abstract

Many studies indicate that dietary omega-3 polyunsatu- rated fatty acids (PUFAs) have the cardioprotective prop- erties. But majority of experiments were carried out with using omega-3 PUFAs from marine fish oil. The purpose of this study was to determine effects of the plant-de- rived omega-3 PUFA (alpha-linolenic acid (a-LA) on pos- tischemic myocardial dysfunction, lipid peroxidation and antioxidant enzymes activity. Male Wistar rats (250-300 g) were divided into 4 groups (n = 10-12 each). In control group (1) were intact rats. The hearts from 2-nd group of animal were exposed to 20 min of global ischemia fol- lowed by 40 min reperfusion according to the Langendorff technique. The 3-rd and 4-th groups of animal received of the plant-derived oil (a-LA), which is a precursor of eicosapentaenoic acid and was used as a dietary supple- ment in dose 0.1 mg/kg per day for 4 weeks. The hearts from 4-th group of animal were also exposed to ischemia/ reperfusion. Analysis of myocardial phospholipid fatty acid content showed that consumption of the plant-de- rived б-LA for 4 weeks changes fatty acid profile through incorporation of б-LA in cell membranes. It also reduced content of omega-6 PUFAs in membrane phospholipids. In 3-rd group content of a-LA and EPA were increased by 1.5- and 3.5-times, respectively, whereas content of AA was reduced by 1.7-times. The development of ischemia/ reperfusion in 2-nd group caused increase of free AA content in heart tissue by 3.5-times, whereas in 4-th group this increase was only by 1.4-time. Ischemia/reperfusion of the isolated rat heart in 4-th group was accompanied by reduced leukotriene C4 and thromboxane B2 produc- tion in 3-times and 1.9-times, respectively in comparison to 2-nd group. The time of myocardial function recovery after ischemia (heart rate, left ventricular development pressure), was shorter compare to 2-nd group. Also in 4- th group end-diastolic pressure and coronary perfusion pressure during reperfusion period were significantly lower. Dietary omega-3 PUFAs resulted in remarkable de- crease of reperfusion arrhythmias in 4-th group (in 3.8- times) and limited the oxidative stress through decrease free radical and lipid peroxidation production. In this group of animals the activity of antioxidant enzymes (superoxide dismutase and catalase) after ischemia/reperfusion were higher than in 2-nd group. We suggest that dietary supple- ment of the plant-derived ?-LA for 4 weeks have cardio- protective effects similar to the effects of fish oil.

Full text: (PDF, in Ukrainian)

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