Effect of induced hyperhomocysteinemia on cardiomyocytes under the experimental conditions
Authors:
M. Kovalská 1*; L. Kovalská 2; P. Kaplán 3; M. Kmeťová 3; M. Furjelová 1,3; K. Jurková 1,3; M. Adamkov 1; I. Malachovský 2; Z. Tatakrová 3
Authors place of work:
Ústav histológie a embryológie, Jesseniova lekárska fakulta v Martine, Univerzita Komenského v Bratislave, Slovensko
1; Klinika stomatológie a maxilofaciálnej chirurgie, Univerzitná nemocnica Martin, Martin, Slovensko
2; Ústav lekárskej biochémie, Jesseniova lekárska fakulta v Martine, Univerzita Komenského v Bratislave, Slovensko
3
Published in the journal:
Klin. Biochem. Metab., 22 (43), 2014, No. 2, p. 81-86
Summary
Objective:
Numerous clinical and experimental studies have noticed correlation between the occurrence of clinical effects on vascular genesis and plasma level of homocysteine (Hcy). In general, elevated level of circulating plasma homocysteine is considered as an independent risk factor for occurrence of vascular pathology. Over getting of its risk-free value can lead to increased risk of myocardial infarction up to three times. We investigated the effect of hHcy (hyperhomocysteinemia) on associated changes in MAPK/ERK (Mitogen Activated Protein Kinase/extracellular signal-regulated kinases) pathway in cardiomyocytes.
Design:
Experimental.
Material and methods:
For our experiments we used adult rats (male) Wistar. Their hearts were exteriorized in sterile conditions. The tissues were used to prepare homogenates or for immunohistological analysis. Second group of animals was subcutaneously administered by Hcy in an amount of 0.45 µmol/g of each animal twice a day during the 14-days before the experiment. After this time period the hearts were exteriorized under the same conditions as the previous group. The hearts were then connected to the Langendorff perfusion system.
Results:
In our experiments we have observed significant changes in contractility of cardiomyocytes in Hcy group. The values of left ventricular (LV) speed contractility assessments in contraction (+LV dP/dt) and relaxation (-LV dP/dt) decreased in 30.94% and in 17.42%, respectively. We have also noticed significant changes between the control group and the Hcy group in increase of the p-ERK protein levels to 143% (p<0.05) in Hcy group, which correlated well with immunohistochemical analysis.
Conclusion:
Chemically-induced 14-day hHcy can affect cardiomyocytes and thereby increase the risk of heart damage.
Key words:
heart stroke, homocysteine, hyperhomocysteinemia , MAPK.
Zdroje
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Štítky
Clinical biochemistry Nuclear medicine Nutritive therapistČlánok vyšiel v časopise
Clinical Biochemistry and Metabolism
2014 Číslo 2
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