Diosgenin Attenuates Myocardial Cell Apoptosis Triggered by Oxidative Stress through Estrogen Receptor to Activate the PI3K/Akt and ERK Axes

Am J Chin Med. 2023;51(5):1211-1232. doi: 10.1142/S0192415X23500556. Epub 2023 Jun 17.

Abstract

Cardiovascular diseases in post-menopausal women are on a rise. Oxidative stress is the main contributing factor to the etiology and pathogenesis of cardiovascular diseases. Diosgenin, a member of steroidal sapogenin, is structurally similar to estrogen and has been shown to have antioxidant effects. Therefore, we aimed to investigate the effects of diosgenin in preventing oxidation-induced cardiomyocyte apoptosis and assessed its potential as a substitute substance for estrogen in post-menopausal women. Apoptotic pathways and mitochondrial membrane potential were measured in H9c2 cardiomyoblast cells and neonatal cardiomyocytes treated with diosgenin for 1[Formula: see text]h prior to hydrogen peroxide (H2O2) stimulation. H2O2-stimulated H9c2 cardiomyoblast cells displayed cytotoxicity and apoptosis via the activation of both Fas-dependent and mitochondria-dependent pathways. Additionally, it led to the instability of the mitochondrial membrane potential. However, the H2O2-induced H9c2 cell apoptosis was rescued by diosgenin through IGF1 survival pathway activation. This led to the recovery of the mitochondrial membrane potential by suppressing the Fas-dependent and mitochondria-dependent apoptosis. Diosgenin also inhibited H2O2-induced cytotoxicity and apoptosis through the estrogen receptor interaction with PI3K/Akt and extracellular regulated protein kinases 1/2 activation in myocardial cells. In this study, we confirmed that diosgenin attenuated H2O2-induced cytotoxicity and apoptosis through estrogen receptors-activated phosphorylation of PI3K/Akt and ERK signaling pathways in myocardial cells via estrogen receptor interaction. All results suggest that H2O2-induced myocardial damage is reduced by diosgenin due to its interaction with estrogen receptors to decrease the damage. Herein, we conclude that diosgenin might be a potential substitute substance for estrogen in post-menopausal women to prevent heart diseases.

Keywords: Apoptosis; Chinese Yam Tubers; Dioscorea polystachya; Diosgenin; Menopause; Oxidative Stress.

MeSH terms

  • Apoptosis
  • Cardiovascular Diseases*
  • Diosgenin* / pharmacology
  • Estrogens / metabolism
  • Estrogens / pharmacology
  • Female
  • Humans
  • Hydrogen Peroxide / toxicity
  • Infant, Newborn
  • Myocytes, Cardiac / metabolism
  • Oxidative Stress
  • Phosphatidylinositol 3-Kinases / metabolism
  • Proto-Oncogene Proteins c-akt / metabolism
  • Receptors, Estrogen / metabolism

Substances

  • Proto-Oncogene Proteins c-akt
  • Receptors, Estrogen
  • Phosphatidylinositol 3-Kinases
  • Hydrogen Peroxide
  • Diosgenin
  • Estrogens