Apolipoprotein E-ε4 deficiency and cognitive function in hepatitis C virus-infected patients

Area of Science:

• Neuroscience
• Virology
• Genetics

Background:

• Hepatitis C virus (HCV) infection can cause liver damage and neuropsychiatric symptoms.
• The apolipoprotein E (APOE) ε4 allele is known to protect against HCV-induced liver damage.

Purpose of the Study:

• To investigate the association between APOE genotype and cognitive function in HCV-infected patients.
• To explore the role of APOE in the development of neuropsychiatric symptoms in HCV infection.

Main Methods:

• One hundred HCV-infected patients with mild liver disease were assessed.
• Neurological examinations, psychometric testing (attention, memory), and questionnaires (fatigue, quality of life, mood) were administered.
• APOE genotyping was performed using saliva samples.

Main Results:

• A significantly lower frequency of the APOE-ε4 allele was found in patients with impaired working memory (P = 0.003).
• A trend towards lower APOE-ε4 allele frequency was observed in patients with attention deficits, though not statistically significant after correction.
• The APOE-ε4 allele appears protective against working memory impairment in HCV-infected individuals.

Conclusions:

• The APOE-ε4 allele may confer protection against cognitive deficits, particularly working memory impairment, in HCV-infected patients with mild liver disease.
• These findings suggest a potential role for APOE in the pathogenesis of neuropsychiatric symptoms associated with HCV infection.
• Further research into APOE's role in HCV neuropathogenesis is warranted.