| Journal: |
Life
10.3390/life11020120
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| Abstract: |
Background: Myocardial infarction (MI), a life-threatening disorder, arises from the imbalance between oxygen supply and myocardial demand. Linalool is a naturally occurring monoterpenes
with proved numerous pharmacological actions. This study investigated the cardioprotective effect of
Linalool on isoproterenol (ISO)-induced MI in rat models and explored part of the underlying molecular mechanisms. Methods: Rats were divided into five groups; groups I and II served as normal and
linalool control groups, Group III administered ISO alone; groups V and VI received two different
doses of Linalool and were challenged by ISO. Different biochemical parameters were determined,
including hemodynamic, infarction size, cardiac enzymes, apoptotic markers, and inflammatory
mediators. Results: Linalool limited the infarcted area size and diminished the elevated cardiac
enzymes. Linalool escalated HO-1 and Nrf2, both nuclear and cytosol fractions, and reduced Keap 1.
Linalool enhanced cardiac antioxidant activities, reduced inflammatory cytokines (tumor necrosis
factor-alpha (TNF-α), nuclear factor-κ-B (NF-κB), interleukin 1 beta (IL-1β), interleukin 6 (IL-6)),
apoptotic markers (Caspase-3, Caspase-9, and Bax), and elevated Bcl2. Conclusion: Linalool could
act as an effective cardioprotective agent in the MI model through improving the oxidative condition,
probably via the Nrf2/HO-1 pathway and by abolishing both apoptotic and inflammatory respons
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