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Plasma Angiotensin-(1-7) is a Potential Biomarker for Alzheimer’s Disease

[ Vol. 13 , Issue. 2 ]

Author(s):

Teng Jiang, Lan Tan, Qing Gao, Huan Lu, Xi-Chen Zhu, Jun-Shan Zhou and Ying-Dong Zhang   Pages 96 - 99 ( 4 )

Abstract:


Brain angiotensin-(1-7) (Ang-(1-7)) concentration has been shown to be reduced and inversely correlated with tau pathology in a mouse model of Alzheimer’s disease (AD). In this study, to determine whether the concentration of Ang-(1-7) and the activity of its converting enzyme angiotensin-converting enzyme 2 were altered in plasma under AD context, the plasma samples from 110 AD patients and 128 age- and gender-matched controls were screened. In AD patients, the plasma concentration of Ang-(1-7) was significantly reduced (15.63±4.35pg/mL vs. 19.58±3.22pg/mL, P<0.001) and positively correlated with cognitive functions (R=0.66, P<0.001). Meanwhile, receiver-operating characteristic analysis showed that the Ang-(1-7) concentration in plasma could distinguish AD patients from controls with the sensitivity and specificity of 69.1% and 74.2%, respectively, when the optimal cut-off value (18.2 pg/mL) was chosen. These findings indicate that plasma Ang-(1-7) may represent a potential biomarker for AD diagnosis, and further suggest an involvement of this heptapeptide in the pathogenesis of this disease.

Keywords:

Alzheimer’s disease, Renin-angiotensin system, angiotensin-(1-7), ACE2, plasma, biomarker.

Affiliation:

Department of Neurology, Nanjing First Hospital, Nanjing Medical University, No.68, Changle Road, Nanjing, China.



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