Dementia Due to Alzheimer's Disease (Disorder), Mild Cognitive Impairment Due to Alzheimer's Disease
Conditions
Keywords
Mild Cognitive Impairment, Alzheimer Disease, Blood cells, Adiposity, Nutrition
Brief summary
The aim of this study is to identify transcriptomic biomarkers in blood cells to diagnose early cognitive impairment. This would allow preventing the development of severe pathologies, such as Alzheimer Disease. In addition, this project will analyse the influence of adiposity, obesity, nutritional habits and physical activity on cognition.
Detailed description
Blood cells constitute a minimally invasive material, which is presented as potentially suitable for addressing the identification of clinical diagnostic biomarkers. This study will compare gene expression in blood cells of patients with various degrees of cognitive alteration (mild cognitive impairment due to Alzheimer's disease and dementia due to Alzheimer's Disease) compared to control individuals, to identify early biomarkers of impaired cognition. The availability of non-invasive early biomarkers of cognitive dysfunction is highly relevant in the field of public health, from the point of view of being able to prevent or delay the onset and/or progression of dementia and other cognitive disorders. In addition, it is intended to establish the association between the biomarkers identified with nutritional imbalances and increased adiposity/obesity.
Interventions
OTHERNo intervention will be performed.
No intervention will be performed.
Sponsors
Fundació d'investigació Sanitària de les Illes Balears
Consorcio Centro de Investigación Biomédica en Red (CIBER)
University of the Balearic Islands
Study design
Observational model
CASE_CONTROL
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
55 Years to 80 Years
Healthy volunteers
Yes
Inclusion criteria
1. Control group Inclusion criteria: * Age between 55-80 years * Absence of cognitive symptoms * Normal neuropsychological examination, (Clinical Dementia Rating, CDR = 0)
Exclusion criteria
* Any disease that could influence their cognitive performance or blood cell parameters. 2. Group with Mild Cognitive Impairment Due to Alzheimer's Disease (MCI group) Inclusion criteria: * Age between 55-80 years * Established diagnosis of MCI * Cognitive deficit of 1.5 standard deviation in at least one of the neuropsychological tests performed, with no relevant functional repercussion (Functional Activities Questionnaire, FAQ\<7 and CDR≤0.5) 3. Group with Dementia Due to Alzheimer Disease (AD) Inclusion criteria: * Age between 55-80 years * Established diagnosis of Alzheimer's disease * CDR ≥ 0.5 and positive AD markers in cerebrospinal fluid
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Percentage of semiquantitative gene expression of blood cells between the three groups | Baseline point (all groups) | Gene expression analysis performed by real-time quantitative polymerase chain reaction (RT-qPCR). Percentage of semiquantitative gene expression between the groups: MCI vs Control, AD vs Control, and MCI vs AD |
| Mini-Mental State Examination (MMSE), questionnaire (numerical scale) | Baseline point (all groups) | Cognitive test |
| Montreal Cognitive Assessment (MoCA), questionnaire (numerical scale) | Baseline point (all groups) | Cognitive test |
| Cognitive Reserve Questionnaire (CRIq), questionnaire (numerical scale) | Baseline point (all groups) | Cognitive test |
| Body composition (fat mass) | Baseline point (all groups) | Percentage of fat mass measured using a dual energy x-ray absorptiometry (DXA) scanner |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Transpeptidase (GGT, U/L) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| Height (cm) | Baseline point (all groups) | Basic anthropometric parameter, measured in centimeters with a tape-measure |
| Weight (kg) | Baseline point (all groups) | Basic anthropometric parameter, measured using a scale |
| Waist-hip ratio (numerical ratio) | Baseline point (all groups) | Basic anthropometric parameter. Waist circumference (cm) and hip circumference (cm) will be combined to report waist-hip ratio (waist(cm)/hip(cm)) |
| Blood pressure (mm Hg) | Baseline point (all groups) | Basic anthropometric parameter, measured in millimeters of mercury with a blood pressure monitor |
| Body Mass Index (BMI) (kg/m2) | Baseline point (all groups) | Basic anthropometric parameter. Weight and height will be combined to report BMI in kg/m\^2 |
| Complete blood count test (numbers of cells/mcL) | Baseline point (all groups) | Circulating parameter (from blood sample). It will be measured: red blood cells, white blood cells (neutrophils, lymphocytes, monocytes, eosinophils, basophils) and platelets. All of them measured in numbers of cells/mcL by a complete blood count test. |
| Plasma glucose (mg/dL) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| C-reactive protein (CRP, mg/dL) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| Total cholesterol (mg/dL) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| High-density lipoprotein cholesterol (HDL-C,mg/dL) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| Low-density lipoprotein cholesterol (LDL-C, mg/dL) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| Glycated hemoglobin (HbA1c, %) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| Test on nutritional habits, questionnaire (numerical scale) | Baseline point (all groups) | Lifestyle test. Test on nutritional habits based on a 14-item Mediterranean diet questionnaire |
| International Physical Activity Questionnaire, IPAQ (numerical scale) | Baseline point (all groups) | Lifestyle test, specifically a physical activity test |
| STOP-BANG Sleep Apnea Questionnaire (numerical scale) | Baseline point (all groups) | Lifestyle test, specifically a screening for obstructive sleep apnea in adults |
| Gait Speed Test (m/s) | Baseline point (all groups) | Gait speed is recorded on a 4 meter walkway with 2 meter non-instrumented walkway segments at each end to allow for acceleration and deceleration. Gait speed recorded is the average of the speed for the two trials |
| Triglycerides (TG, mg/dL) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| Apolipoprotein E (APOE, mg/dL) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| Aspartate aminotransferase (AST, U/L) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| Alanine aminotransferase (ALT, U/L) | Baseline point (all groups) | Circulating parameter (from blood sample) |
| Gamma-glutamyl transpeptidase (GGT, U/L) | Baseline point (all groups) | Circulating parameter (from blood sample) |
Countries
Spain
Outcome results
None listed