Alzheimer Disease Clinical Trial
Official title:
Comparison of Subjective Cognitive Decline Between the German and Chinese and Early Diagnosis of Alzheimer's Disease Based on Radiogenomics
The incidence of AD dementia is increasing due to the aging population, putting a heavy burden on our society and economics. Exploring the mechanisms underlying SCD due to preclinical AD has scientific and clinical significance. However, it is challenging to construct and validate the preclinical diagnosis model of AD with fused multimodel information across culture/race. From the cooperation during the past five years, we have established cohorts by synchronized assessment, achieved consensus on SCD features extraction and made a breakthrough in the application of multiple parameter MRI with German collaborators. Therefore, in this project, SCD with and without amyloid pathology will be compared by clinical and cognitive data, genetics, blood and MRI biomarkers between the German and Chinese. Key features will be extracted and specific characteristics of SCD due to preclinical AD as well as risk factors for conversion between two countries will be clarified. Then the diagnosis model of preclinical AD in SCD will be established across culture/race based on radiogenomics, which will improve the current diagnostic system of AD. Through this project, the value of SCD in the etiologic, anatomical and quantitative diagnosis of preclinical AD will be identified to improve sensitivity and specificity of preclinical AD diagnosis in clinical practice.
The overall prevalence of dementia worldwide is increasing, imposing a heavy burden on the public and health care systems. Subjective cognitive decline (SCD), characterized by a self-report of decline in cognitive function without objective impairment in neuropsychological assessments, is considered a high risk factor for AD. SCD with amyloidopathy is considered as a first symptomatic indicator of the preclinical AD (SCD due to preclinical AD). However, how to construct and validate the preclinical diagnosis model of AD with fused multimodel information across culture/race remain unclear. In the present study, all SCD participants from Germany and China will be conducted amyloid PET scanning, and they will be classified into two groups (SCD with amyloid+ and SCD with amyloid-) based on whether there is the evidence of amyloid deposition. The investigators will compare the clinical information, genetics, blood and multiple parameter MRI data between the German and Chinese to evaluate the common and specific features from different culture/race. Then, key features associated with amyloid deposition will be extracted for the establisment of diagnosis model of SCD due to preclinical AD, which will improve the current diagnostic system of AD. After four-year follow-up, SCD will be classified into SCD converter group and SCD non-converter group. Risk factors for conversion to cognitive impairment and dementia will be further extracted as predicted biomarkers. Through this project, the value of SCD in the etiologic, anatomical and quantitative diagnosis of preclinical AD will be identified to improve sensitivity and specificity of preclinical AD diagnosis in clinical practice. ;
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