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Hypertensive vascular and cardiac remodeling protection by allicin in spontaneous hypertension rats via CaMK Ⅱ/NF-κB pathway.
Biomedicine & Pharmacotherapy 2022 November
Allicin is the main active component of Traditional Chinese medicine, garlic. It is widely used to treat cardiovascular diseases. Our previous studies have confirmed that allicin significantly reduces blood pressure in Spontaneous Hypertension Rats (SHRs). However, the reports studying the effect of allicin on vascular and cardiac remodeling caused by hypertension are few, with their underlying mechanism not being studied in detail or fully elucidated. In this study, we treated 12-week-old SHRs with allicin for 4 weeks. After 4 weeks, allicin was shown to improve vascular and cardiac remodeling in SHRs, as evidenced by reduced cardiac left ventricular wall thickness, aortic vessel thickness, and reduced proliferating cell nuclear antigen (PCNA) and smooth muscle actin (α-SMA), and increased expression of and smooth muscle 22α (SM 22α). Additionally, allicin reduced serum IL-1β, IL-6, and TNF-α levels, improved calcium homeostasis in cardiomyocytes, downregulated calcium transportation-related CaMK II and inflammation-related NF-κB and NLRP3, which were observed in smooth muscle cells and cardiomyocytes. Thus, we inferred that allicin protected hypertensive vascular and cardiac remodeling in Spontaneous Hypertensive Rats by inhibiting the activation of the CaMK II/ NF-κB pathway. This study also provided new mechanistic insights into the anti-hypertensive vascular and cardiac remodeling effects of allicin, highlighting its therapeutic potential.
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