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Infection

Viral Infections Linked to Neurodegenerative Diseases in Groundbreaking Meta-Analysis

Strategic Insights

— 1 min read

Researchers at Sichuan University have conducted a comprehensive meta-analysis and systematic review, published in Translational Psychiatry, to investigate the associations between viral infections and the risk of neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis. The study, which analyzed 34,417 articles and identified 73 eligible studies, found significant correlations between infections with cytomegalovirus, SARS-CoV-2, hepatitis C virus, and human herpesvirus and an increased risk of Alzheimer's disease. For Parkinson's disease, hepatitis B virus and hepatitis C virus were identified as risk factors.

Key Takeaways:

  • The meta-analysis demonstrated that infections with CMV, SARS-CoV-2, HCV, and HHV were associated with an increased risk of Alzheimer's disease, with odds ratios ranging from 1.24 to 1.88.
  • For Parkinson's disease, infections with HBV and HCV were identified as risk factors, with odds ratios of 1.18 and 1.29, respectively.
  • No significant correlation was found between any viral infection and the risk of ALS.
  • The study suggests a role of select viral infections in the pathogenesis of Alzheimer's and Parkinson's diseases.
  • The authors recommend further large, multicenter, and longitudinal studies to elucidate mechanisms and confirm causality.
  • Researchers implicated Kang-Fu Yin, Ru-Yin Liu, Sheng-Yi He, Wei-Ming Su, Qing-Qing Duan, Xiang-Jin Wen, Ting Chen, Cong Shen, Ju-Rong Li, Bei Cao, and Yong-Ping Chen in this research.

Statistics:

  • 34,417 articles were identified in the meta-analysis.
  • 73 eligible studies met the inclusion criteria for inclusion in the meta-analysis.
  • 48 studies were included in the systematic review.
  • The odds ratio for CMV infection and Alzheimer's disease was 1.41 (95% CI: 1.03, 1.93).
  • The odds ratio for SARS-CoV-2 infection and Alzheimer's disease was 1.88 (95% CI: 1.53, 2.32).
  • The odds ratio for HCV infection and Parkinson's disease was 1.29 (95% CI: 1.18, 1.41).

Sources:

  • Viral infections and the risk of neurodegenerative diseases: a comprehensive meta-analysis and systematic review. Translational Psychiatry, 2025;15(1):388.
  • Nature Publishing Group - www.nature.com/
  • Translational Psychiatry - www.nature.com/tp/
  • Springernature, Campus, 4 Crinan St, London, N1 9XW, England.

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