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    Protective effects of Lacticaseibacillus rhamnosus on isoprenaline-induced myocardial infarction in rats
    (Oxford Univ Press, 2023) Beyazçicek, Ersin; Beyazçicek, Özge
    Aims Myocardial infarction (MI) is among the main public health problems in the world. This atherosclerotic cardiovascular disease (ASCVD), which seriously endangers human health, progresses to cause heart failure and myocardial fibrosis with a poor prognosis. The gut microbiota plays an important role in health and disease, including obesity and ASCVD. In this study, the protective effect of Lacticaseibacillus rhamnosus GG, known for its anti-inflammatory and antioxidant effects, on isoprenaline (ISO)-induced MI in rats was investigated. Methods and results Rats were divided into four groups of seven rats in each group as control, ISO, L. rhamnosus, and ISO + L. rhamnosus.The ISO application was made by subcutaneous injection to the rats on the last two days (days 27th and 28th) of the 28-day substance administration. The rats were anesthetized 24 hours after the application of ISO, and blood samples were collected after electrocardiogram (ECG) recordings. To determine myocardial damage and protective effects of L. rhamnosus, serum creatine kinase-MB, cardiac troponin-I, tumor necrosis factor-alpha, interleukin-10, and C-reactive protein (CRP) levels were examined. In addition, ECG recordings were evaluated. While L. rhamnosus had a decreasing effect on cardiac troponin-I, creatine kinase-MB, CRP, and tumor necrosis factor-alpha levels, which increased due to ISO, it had an increasing effect on interleukin-10 levels. Similarly, it decreased the ST-segment elevation caused by ISO while increasing the reduced R wave amplitude.