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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(4): 8-15

Effects of stimulation and blockade of the synthesis of endogenous hydrogen sulfide at myocardial ischemia-reperfusion

Sahach VF, Shymans'ka TV, Hoshovs'ka IuV

    O.O.Bogomoletz Institute of Physiology National Academy of Science of Ukraine, Kyiv, Ukraine
DOI: https://doi.org/10.15407/fz59.04.008


Abstract

In experiments on isolated rat hearts, perfused according to Langendorff method, the effects of stimulation of the synthesis and blockade of endogenous hydrogen sulfide in myocardial ischemia-reperfusion (20 min/40 min) was studied. L-cysteine (121 mg/kg), precursor of endogenous hydrogen sulfide was injected intraperitoneally 30 minutes before the experiment without and within 10 minutes after administration of DL-propargylglycine (11.3 mg/kg) ("Sigma", USA)--inhibitor of cystathionine-gamma-lyase. The heart function was assessed by measuring the LVDP, dP/dt, coronary flow, heart rate. The opening of mitochondria permeability transition (MPT) pore was estimated by releasing of a stable factor with UV absorbance (lambda(max) 250 nm) into the coronary outflow probes during the initial phase of reperfusion. Administration L-cysteine was accompanied by a decrease of reperfusion disorders in cardiac function compared to control rats. The results showed that L-cysteine pretreated hearts against the blockade of cystathionine-gamma-lyase with DL-propargylglycine exerted a powerful cardioprotective effect in ischemia-reperfusion injury. Significant post-ischemic recover of heart function and improving the efficiency of oxygen metabolism was accompanied with tiny quantity of mitochondrial factor releasing comparing to I/R group. Positive influence of the combined DL-propargylglycine and L-cysteine action was the prevention of MPT pore opening.

Keywords: hydrogen sulfide, L-cysteine, DL-propargylglycine, isolated heart, ischemia-reperfusion, mitochondrial permeability transition pore

Full text: (PDF, in Ukrainian)

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