Articles

Effects of Levothyroxine and Liothyronine on Cirrhotic Cardiomyopathy in Rats

Abstract

In liver cirrhosis, there is low T3 syndrome associated with a decrease in total triiodothyronine (T3) and free T3 concentrations and cirrhotic cardiomyopathy (CCM) with chronotropic incompetence. Thus, we aimed to investigate the effects of eliminating T3 and thyroxine (T4) deficiencies on cardiac chronotropic dysfunction. Bile duct ligation (BDL) was used to induce cirrhosis in male Wistar rats. The chronotropic responses were studied through the Power Lab system in sham/saline, sham/T3T4, BDL/saline, and BDL/T3T4 groups. The serum T3 and T4, and T3 resin uptake (T3RU) levels were assessed. The atrial T3 receptor expression was investigated through a real-time polymerase chain reaction (Real-time PCR). The chronotropic responses were decreased in the BDL/saline group and raised in the BDL/T3T4 group. The serum T3 levels decreased in the BDL/saline group compared to sham group, but increased in the BDL/T3T4 group compared to the BDL/saline group. The serum T4 level increased in the BDL/saline and decreased in the BDL/T3T4 group. The serum T3RU level decreased in the BDL/saline and increased in the BDL/T3T4 group. The T3 receptor expression in atria increased in the BDL/saline group, nonetheless, it did not change in the BDL/T3T4 group compared to the sham/saline and the BDL/saline groups. T3T4 treatment did not increase the chronotropic response in the control group but the treatment improved the chronotropic hyporesponsiveness, and serum T4 and T3 RU abnormalities in cirrhosis, however, it is not related to the atrial T3 receptor expression.

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IssueVol 61 No 10 (2023) QRcode
SectionArticles
DOI https://doi.org/10.18502/acta.v61i10.15660
Keywords
Chronotropic responses Triiodothyronine Thyroxine T3 resin uptake
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How to Cite
1.
Mohammad Jafari R, Mohammed D, Tavangar SM, Eftekhari G, Shokrian Zeini M, Khodadoostan A, Dehpour AR, Jazaeri F. Effects of Levothyroxine and Liothyronine on Cirrhotic Cardiomyopathy in Rats. Acta Med Iran. 2024;61(10):607-613.