The development and progression of atherosclerosis: evidence supporting a role for endoplasmic reticulum (ER) stress

Cameron S McAlpine1, Geoff H Werstuck

  • 1Thrombosis and Atherosclerosis Research Institute, 237 Barton Street East, Hamilton, Ontario, Canada L8L 2X2.

Insights

Endoplasmic reticulum (ER) stress, a cellular dysfunction, is increasingly linked to atherosclerosis, the main cause of cardiovascular disease. Targeting ER stress may offer new therapeutic strategies for preventing and treating this widespread condition.

Area of Science:

  • Cardiovascular biology
  • Cellular stress response
  • Molecular medicine

Background:

  • Cardiovascular disease (CVD) remains the leading global cause of mortality.
  • Atherosclerosis, a chronic inflammatory arterial disease, underlies most CVD cases.
  • Current understanding of molecular links between risk factors and atherosclerosis progression is incomplete.

Purpose of the Study:

  • To review the role of endoplasmic reticulum (ER) stress in atherosclerosis.
  • To explore ER stress involvement in the initiation and progression of the disease.
  • To discuss potential therapeutic strategies targeting ER stress for anti-atherogenic treatments.

Main Methods:

  • Literature review of studies on ER function and cardiovascular disease.
  • Analysis of molecular mechanisms linking ER stress to atherosclerotic processes.
  • Discussion of preclinical and clinical data relevant to ER stress modulation.

Main Results:

  • Endoplasmic reticulum (ER) dysfunction is implicated in various human diseases, including atherosclerosis.
  • Evidence suggests ER stress contributes to the initiation and advancement of atherosclerotic lesions.
  • Specific molecular pathways within the ER are associated with inflammatory responses in atherosclerosis.

Conclusions:

  • Endoplasmic reticulum (ER) stress is a significant factor in the pathogenesis of atherosclerosis.
  • Modulating ER stress pathways presents a promising avenue for novel anti-atherogenic therapies.
  • Further research into ER stress mechanisms could lead to effective treatments for cardiovascular disease.

Related Concept Videos

Role of ER in the Secretory Pathway01:17

Role of ER in the Secretory Pathway

Eukaryotic cells have a special pathway that enables communication between various intracellular membrane-bound compartments and also with the extracellular environment. This pathway is termed as the secretory pathway.
Components of the secretory pathway
About a third of proteins synthesized in the cell are sorted via the secretory route. They shuffle between different compartments in membrane-bound vesicles until they reach their final destination. The main intracellular compartments involved...
Atherosclerosis I: Introduction01:30

Atherosclerosis I: Introduction

Atherosclerosis is a progressive disorder characterized by the buildup of plaques on the arterial inner wall, causing them to narrow and harden over time. These plaques comprise lipids, calcium, blood components, carbohydrates, and fibrous tissue. The process primarily affects the intima of large and medium-sized arteries, reducing blood flow in any artery.Etiology and risk factorsThe cause of atherosclerosis is multifactorial, involving a complex interplay among endothelial injury, lipid...
Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
Inflammation01:38

Inflammation

Overview
Regulation of the Unfolded Protein Response01:31

Regulation of the Unfolded Protein Response

Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models โ€” direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
The Unfolded Protein Response01:37

The Unfolded Protein Response

The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...