CSF p-Tau levels in the prediction of Alzheimer's disease.
The two hallmarks of Alzheimer's disease (AD) are neurofibrillary tangles and amyloid plaques. Neurofibrillary tangles are formed due to the hyperphosphorylation of tau protein. There is an urgent need to develop a reliable biomarker for the diagnosis of AD. Cerebrospinal fluid (CSF) is surrounding the brain and reflects the major neuropathological features in the AD brain. Diagnosis, disease progression and drug actions rely on the AD biomarkers. Mainly CSF tau and phosphorylated tau (p-Tau) have been observed to serve the purpose for early AD. Keeping in view the early appearance of p-Tau in CSF, we analyzed p-Tau levels in 23 AD, 23 Non AD type dementia (NAD), 23 Neurological control (NC) and 23 Healthy control (HC) North Indian patients. The levels of p-Tau were found to be increased in AD patients (67.87±18.05 pg/ml, SEM 3.76) compared with NAD (47.55±7.85 pg/ml, SEM 1.64), NC (34.42±4.51 pg/ml, SEM 0.94) and HC (27.09±7.18 pg/ml, SEM 1.50). The resulting sensitivity for AD with NAD was 80.27% whereas with respect to the NAD, NC and HC was 85.40%. Therefore elevated levels of p-Tau in AD can be exploited as a predictive biomarker in North Indian AD patients.
Department of Biochemistry, Post Graduate Institute of Medical Education and Research , Chandigarh , India 160 012.
Ramesh J L
RJ
Kandimalla
Sudesh
S
Prabhakar
Willayat Yousuf
WY
Wani
Alka
A
Kaushal
Nidhi
N
Gupta
Deep Raj
DR
Sharma
V K
VK
Grover
Neerja
N
Bhardwaj
Kajal
K
Jain
Kiran Dip
KD
Gill
Alzheimer's disease; North Indian patients; Sensitivity; p-Tau