Anti-cyclic citrullinated peptide antibody (anti-CCP antibody) is present in the sera of patients with dementia of Alzheimer’s type in Asian

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Abstract:

Satoh K, Kawakami A, Shirabe S, Tamai M, Sato A, Tsujihata M, Nagasato K, Eguchi K. Anti-cyclic citrullinated peptide antibody (anti-CCP antibody) is present in the sera of patients with dementia of Alzheimer’s type in Asian.

Acta Neurol Scand. 2010: 121: 338–341.

© 2009 The Authors Journal compilation © 2009 Blackwell Munksgaard. Background – 

In the hippocampi of Alzheimer’s disease (AD) patients, aberrant expression of citrullinated proteins and peptidylarginase 2 (PADI2) has been identified. We explored the functional roles of these proteins by means of detection of serum anti-cyclic citrullinated peptide antibody (anti-CCP antibody) in patients with dementia of Alzheimer’s type (DAT). Methods – 

Sera were obtained from 42 patients with DAT, 30 patients with other neurological disorders and 42 healthy controls. Gender ratio and age were comparable among the three groups. The level of anti-CCP antibody in sera was examined by ELISA. Findings – 

Anti-CCP antibody was not found in the 30 patients with other neurological disorders, and only one of the 42 healthy controls (2.4%) was positive. However, surprisingly, anti-CCP antibody was clearly detected in eight of the 42 DAT patients. Interpretation – 

Anti-CCP antibody appears to be a simple and early serologic biomarker for DAT among dementia patients. Additionally, our data imply that citrullinated proteins accumulated in the astrocytes of AD patients acquire neo-antigenicity, inducing anti-CCP antibody production.

Keywords: anti-cyclic citrullinated peptide antibody; dementia of Alzheimer's type

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1600-0404.2009.01217.x

Affiliations: 1: First Department of Internal Medicine, Nagasaki University School of Medicine 2: Nagasaki Kita Hospital, Nagasaki, Japan 3: Isahaya General Hospital, Isahaya, Japan

Publication date: May 1, 2010

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