Changes in rat myocardium contractility under subchronic intoxication with lead and cadmium salts administered alone or in combination

Toxicology Reports

Boris A. Katsnelson¹  Ruslan V. Lisin¹  Salavat R. Nabiev²  Larisa V. Nikitina²  Ksenya A. Butova²  Alexander A. Balakin²  Oksana P. Gerzen²  Leonid B. Katsnelson²  Oleg N. Lookin²  Yuri L. Protsenko²  Ilzira A. Minigalieva³  Svetlana V. Klinova³  Larisa I. Privalova³ 

[1] Ural Federal University, Yekaterinburg, Russia;Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia;Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, Yekaterinburg, Russia;

关键词: Cardiotoxicity;    Lead;    Cadmium;    Myocardium contractility;    Myosin;    Trabecules;   

DOI  :  

来源: DOAJ

【 摘 要 】

Subchronic intoxications induced in male rats by repeated intraperitoneal injections of lead acetate and cadmium chloride, administered either alone or in combination, are shown to affect the biochemical, cytological and morphometric parameters of blood, liver, heart and kidneys. The single twitch parameters of myocardial trabecular and papillary muscle preparations were measured in the isometric regime to identify changes in the heterometric (length-force) and chronoinotropic (frequency-force) contractility regulation systems. Differences in the responses of these systems in trabecules and papillary muscles to the above intoxications are shown. A number of myocardium mechanical characteristics changing in rats under the effect of a combined lead-cadmium intoxication and increased proportion of α-myosin heavy chains were observed to normalize fully or partially if such intoxication was induced against background administration of a proposed bioprotective complex. Based on the experimental results and literature data, some assumptions are suggested concerning the mechanisms of the cardiotoxic effects produced by lead and cadmium.

【 授权许可】

Unknown