Ashwagandha (Withania somnifera) in insulin resistance and metabolic syndrome: A literature review on mechanisms

Metabolic syndrome is characterized by obesity, insulin resistance, dyslipidemia, and hypertension. Withania somnifera, commonly known as ashwagandha or Indian winter cherry, belongs to the Solanaceae family. W. somnifera, particularly its powdered root, is a fundamental component of traditional Indian medicine. W. somnifera (Ashwagandha) exhibits pharmacological activities, including immunomodulatory, anti-stress, and neuroprotective effects in animal models. Also, preclinical and clinical studies demonstrate its anti-inflammatory and antiviral properties. In rodent studies, ashwagandha regulates apoptosis and modulates reactive oxygen species (ROS) levels as well as mitochondrial activity. Additionally, it improves endothelial function in rats, dogs, and human brain endothelial cells. Research conducted in both living organisms and controlled laboratory conditions has demonstrated that W. somnifera alleviates the symptoms of metabolic syndrome. It positively affects diabetes by inhibiting dipeptidyl peptidase-۴ (DPP-۴), α-glucosidase, and α-amylase, while simultaneously increasing pancreatic insulin secretion and improving insulin sensitivity in organs. It has a vasodilatory and diuretic effect. Ashwagandha reduces the activity of ۳-hydroxy-۳-methylglutaryl coenzyme A (HMG-CoA) reductase. It modulates the gene expression of peroxisome proliferator-activated receptor (PPAR)-γ. It regulates the gene expression of sterol regulatory element-binding protein (SREBP)-۱c and CYP۷A۱. It increases the secretion of bile acids that eliminate excess cholesterol. It reduces oxidative stress and inflammation while protecting the body from the harmful effects of elevated cholesterol. This study aims to compile a variety of research findings on the effectiveness of ashwagandha in managing metabolic syndrome.

کلیدواژه ها:

Atherosclerosis ، Dyslipidemia ، Hypertension ، Indian ginseng ، metabolic syndrome ، Withania somnifera