Abstract
Background: The aim of this study was to investigate individual changes of protein expression in atherosclerotic plaques of coronary arteries at different stages of development of coronary atherosclerosis. Methods: The research object was homogenates of atherosclerotic plaques from coronary arteries at different stages of development (stable atherosclerotic plaques and unstable necrotic-dystrophic atherosclerotic plaques). The plaque proteins were separated by two-dimensional electrophoresis and the gel images were analyzed using PDQuest software. The amount of protein was determined in relative units of the intensity of staining of protein spots. The identification of protein fractions was based on peptide mass mapping by matrix-activated laser desorption ionization (MALDI). Results: Groups of proteins were identified whose expression differed more than 1.5-fold among the three stages of atherosclerotic-plaque development. At the stage of lipidosis and fibrosis in the stable plaque, the amounts of the following proteins were increased: actins, tubulin, tropomyosin, and keratin. At the fibrosis-and-calcinosis stage of the stable atherosclerotic plaque, we noted upregulation of the following proteins: microfibril-associated glycoprotein 4, mimecan, annexin A5, and peroxiredoxin-2. The unstable-plaque stage of the dystrophic necrotic type was characterized by overexpression of serum albumin, fibrinogen, serum amyloid (P component), and vimentin. Conclusion: Possible patterns of changes in protein expression were founded among three stages of development of atherosclerotic plaques of the coronary arteries when comparing individual gels and pools of homogenates of atherosclerotic plaques.
Authors and affiliations
E.M. Stakhneva(1), I.A. Meshcheryakova(2), E.A. Demidov(2), K.V. Starostin(2), E.V. Sadovski(1), S.E. Peltek(2), A.M. Chernyavskii(3), A.M. Volkov(3), A.V. Kurguzov(3), I.S. Murashov(3), Yu.I. Ragino(1), 1-Research Institute of Internal and Preventive Medicine – Branch of the Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Bogatkova str, 175/1, Novosibirsk, 630089, Russian Federation; 2-Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences, Academician Lavrentiev str, 10, Novosibirsk, 630090, Russian Federation; 3-The Federal State Budgetary Institution «National Medical Research Center named academician E.N. Meshalkin «of the Ministry of Health of the Russian Federation, Rechkunovskaya str, 15, Novosibirsk, 630055, Russian Federation Е-mail: stahneva@yandex.ru
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