Glycolysis and rheumatoid arthritis

Area of Science:

• Biochemistry
• Immunology
• Rheumatology

Background:

• Glucose metabolism is vital for cellular energy and signaling.
• Rheumatoid arthritis (RA) pathogenesis involves complex immune and metabolic dysregulation.
• Emerging evidence links aberrant glucose metabolism to RA development and progression.

Purpose of the Study:

• To review recent advancements in understanding the role of glucose metabolism in rheumatoid arthritis.
• To highlight the connection between enhanced glycolysis, a hypoxic microenvironment, and synovial cell transformation in RA.
• To identify key glycolytic enzymes and metabolic products as potential contributors to RA autoimmunity and joint destruction.

Main Methods:

• Literature review of recent studies on glucose metabolism and rheumatoid arthritis.
• Analysis of evidence regarding glycolytic activity in RA synovial tissues.
• Examination of the role of specific glycolytic enzymes and metabolites in RA pathogenesis.

Main Results:

• RA synovial tissues exhibit increased glycolytic activity, leading to an acidic microenvironment.
• Hypoxia in RA synovial membranes is associated with enhanced glycolysis.
• Key glycolytic enzymes (e.g., glucose phosphate isomerase, enolase, aldolase) act as autoantigens in RA.
• Metabolic substrates like lactate and pyruvate stimulate abnormal cell proliferation, angiogenesis, and pannus formation in RA.

Conclusions:

• Altered glucose metabolism, particularly enhanced glycolysis, is a significant factor in rheumatoid arthritis pathogenesis.
• The acidic microenvironment and hypoxia in RA synovium are driven by increased glycolysis.
• Specific glycolytic enzymes and metabolites contribute to RA autoimmunity and joint pathology, representing potential therapeutic targets.