“ фаол тадбиркорлик, инновацион ғоялар ва технологияларни қЎллаб-қувватлаш йили”



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75-талабалар-илмий-жамияти

Materials and methods. Mitochondria were isolated from the liver of rats by differential 
centrifugation (2) using 0.25 M sucrose as a release medium in 10 mM Tris-HCl buffer pH 7.4 
containing 2 mM EDTA. Fractions of phospholipids are determined by TLC methods (1). 
Results. The obtained results show that the increase in the temperature for the content of 
phospholipids in the mitochondria at 37 ° C for 4 hours of incubation at pH-7.4, the level of the 
total amount of phospholipids (phosphotidylcholine-PX, phosphatidylethanolamine-PEA and 
cardiolipin-CR) decreases by 1.29 times, then at 420 ° C it decreases by 1.39 times from the initial 
level. At the same time, if the level of CR and PEA decreases at 1.5 and 1.35 times at 370
С, then at 
420
С it decreases in 1.85 and 1.56 times from the initial level, i.е. hydrolysis of phospholipids with 
endogenous phospholipases as a result of temperature increase is accelerated approximately in 
times. The increase in temperature slows the formation of phosphatidylserine and reduces the 
content of phosphatidylinositol. The total content of lysophospholipids (LFH, LFEA, LKL) during 
incubation at 420C increased by 2.19 times. Thus LKL level decreased by 1.36 times, as LFEA 
contrary, increased 2.33 times the original level. The content of LFH in the initial stage of 
incubation decreased by 1.44 times, and then it is restored and for 4 hours of experiment the content 
of this phospholipid increases in 1.86 times from the initial level. 
Conclusions. The result of this work proves that pathological processes and stress effects are 
indeed accompanied by hydrolysis of phospholipids of mitochondrial membranes, which may be 
one of the main processes in the mechanism of formation of "hidden" damage. In this case, the 
formed lysoproducts, which are carriers of monovalent cations, increase the permeability of 
mitochondrial membranes. However, an excessive amount of lysoproducts contribute to the 
disruption of the structural integrity of mitochondrial membranes. Therefore, in mitochondria there 
are enzyme systems that prevent the accumulation of lysoforms of phospholipids, one of which is 
lysophospholipase A. 

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