{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T14:00:15Z","timestamp":1783778415325,"version":"3.55.0"},"reference-count":60,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2021,3,27]],"date-time":"2021-03-27T00:00:00Z","timestamp":1616803200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Subchronic intoxication was induced in outbred male rats by repeated intraperitoneal injections with lead oxide (PbO) and\/or cadmium oxide (CdO) nanoparticles (NPs) 3 times a week during 6 weeks for the purpose of examining its effects on the contractile characteristics of isolated right ventricle trabeculae and papillary muscles in isometric and afterload contractions. Isolated and combined intoxication with these NPs was observed to reduce the mechanical work produced by both types of myocardial preparation. Using the in vitro motility assay, we showed that the sliding velocity of regulated thin filaments drops under both isolated and combined intoxication with CdO\u2013NP and PbO\u2013NP. These results correlate with a shift in the expression of myosin heavy chain (MHC) isoforms towards slowly cycling \u03b2\u2013MHC. The type of CdO\u2013NP + PbO\u2013NP combined cardiotoxicity depends on the effect of the toxic impact, the extent of this effect, the ratio of toxicant doses, and the degree of stretching of cardiomyocytes and muscle type studied. Some indices of combined Pb\u2013NP and CdO\u2013NP cardiotoxicity and general toxicity (genotoxicity included) became fully or partly normalized if intoxication developed against background administration of a bioprotective complex.<\/jats:p>","DOI":"10.3390\/ijms22073466","type":"journal-article","created":{"date-parts":[[2021,3,28]],"date-time":"2021-03-28T22:09:01Z","timestamp":1616969341000},"page":"3466","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Cardioinotropic Effects in Subchronic Intoxication of Rats with Lead and\/or Cadmium Oxide Nanoparticles"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0927-4062","authenticated-orcid":false,"given":"Svetlana V.","family":"Klinova","sequence":"first","affiliation":[{"name":"Yekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers, 620014 Yekaterinburg, 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