Cognitive Dysfunction in Non-Alcoholic Fatty Liver Disease-Current Knowledge, Mechanisms and Perspectives

Area of Science:

• Hepatology
• Neurology
• Metabolic Syndrome Research

Background:

• Non-alcoholic fatty liver disease (NAFLD) affects a quarter of the global population and is a key feature of metabolic syndrome.
• Cognitive dysfunction is frequently observed in NAFLD patients, linked to inflammation, vascular issues, and sleep apnea.
• Emerging evidence suggests NAFLD may directly cause cognitive impairment, independent of these associated factors.

Purpose of the Study:

• To review current evidence linking Non-alcoholic fatty liver disease (NAFLD) to cognitive dysfunction.
• To explore potential mechanisms underlying NAFLD-associated cognitive impairment.
• To discuss clinical challenges in diagnosing cognitive dysfunction in NAFLD patients.

Main Methods:

• Literature review of studies investigating Non-alcoholic fatty liver disease (NAFLD) and cognitive function.
• Analysis of proposed pathogenic mechanisms, including gut-liver-brain axis disruption.
• Discussion of diagnostic and characterization challenges.

Main Results:

• Non-alcoholic fatty liver disease (NAFLD) is associated with cognitive dysfunction through various pathways.
• Gut dysbiosis and impaired urea cycle function in NAFLD can lead to ammonia accumulation and systemic inflammation.
• Disruption of the gut-liver-brain axis is implicated in hepatic encephalopathy, a neuropsychiatric syndrome in liver disease.

Conclusions:

• Non-alcoholic fatty liver disease (NAFLD) poses a significant risk for cognitive dysfunction.
• Understanding the mechanisms and improving diagnosis are crucial given the growing prevalence and impact of NAFLD.
• Further research is needed to address the clinical challenges in characterizing and managing cognitive impairment in NAFLD.