Non-invasive detection kit for early diagnosis of Alzheimer's disease

The present invention discloses a new Alzheimer's disease (AD) diagnostic kit that tests blood, saliva and urine, providing a faster, more sensitive, affordable and non-invasive way than conventional method of detection. This detection assay only requires a few microliters of the body fluids to quantify the target AD-related protein biomarkers.The assay is based on the immunoreaction between the target protein biomarkers and their corresponding pair of antibodies followed by fluorescence labelling with a newly developed cyanine turn-on fluorophore. The intensity of the fluorescence signal can act as an index to evaluate the severity of AD.Therefore, the present invention can serve as an analytical tool for early diagnosis, progression monitoring and staging.