- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06275243
Polymorphism of ApoE in Alzheimer's Disease: Genetic Study in Castile and Leon (Spain)
Alzheimer's Disease as a Sociosanitary Priority: ApoE Gene Polymorphism
The general objective of this randomized and longitudinal clinical study was to estimate the frequencies of ApoE variants both in the user population of the "Messengers of Peace" Residences and the "Associations of Relatives of Alzheimer's Patients" in Castile y Leon, since, due to its geographical location at the crossroads, it has received multiple genetic contributions from both northern Europe, the Mediterranean area and northern Africa.
The main questions it aims to answer are:
- What are the allelic frequencies of ApoE variants in the population of individuals with Alzheimer's disease in Castile and Leon?
- Is there a correlation between the ApoE4 variant and the lipid profile in the blood of individuals with Alzheimer's disease in this region?
Study Overview
Status
Conditions
Detailed Description
In the context of Alzheimer disease research, it is widely recognized that the ApoE gene plays a fundamental role in the genetic predisposition of this disease. With three major alleles: ApoE2, ApoE3, and ApoE4, genetic variability in the ApoE gene has been the subject of extensive attention in previous research and its association with increased risk of Alzheimer's disease has remained consistent. Within this framework, three hypotheses are proposed focused on understanding the specific influence of ApoE on Alzheimer's disease and exploring the possible underlying mechanisms.
Within this framework, three hypotheses are proposed focused on understanding the specific influence of ApoE on Alzheimer disease and exploring the possible underlying mechanisms:
- - Research hypotheses: The genetic variant ApoE4/4 is significantly related to a higher risk of developing Alzheimer's disease compared to individuals who do not carry this genotype.
- - Research hypotheses: The ApoE2/2 genetic variant is associated with a lower risk of developing Alzheimer's disease compared to other genotypes.
- - Research hypotheses: People who carry the ApoE4 isoform have elevated levels of total cholesterol and LDL-cholesterol.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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-
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León, Spain, 240071
- University of León
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
- Older Adult
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Be between 60 and 90 years old.
- Subjects with a diagnosis of AD in the case group.
- Subjects free of AD diagnosis in the control group.
- Subjects who voluntarily and consented to participate free of charge.
- Have completed the written consent
Exclusion Criteria:
- Subjects who, at the time of sample collection, had behavioral or other alterations that made the sample collection procedure impossible.
- Subjects who, at the time of sample collection, presented oral alterations incompatible with the technique.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Diagnostic
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Group of cases diagnosed with Alzheimer's disease
Participants: Men and women with age between 60 and 90 years
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Assessment of ApoE variant in saliva samples as a potential biomarker for Alzheimer's disease.
Enhancing the quality of life of study participants by investigating cholesterol levels based on their ApoE genotype.
Through individual interviews, record cardiovascular factors and assess their correlation with Alzheimer's disease.
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Sham Comparator: Control group of healthy individuals without a diagnosis of Alzheimer's disease
Participants: Men and women with age between 60 and 90 years
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Assessment of ApoE variant in saliva samples as a potential biomarker for Alzheimer's disease.
Through individual interviews, record cardiovascular factors and assess their correlation with Alzheimer's disease.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Distribution of ApoE variants in the Alzheimer's disease population diagnosed in Castile and Leon.
Time Frame: 9 months
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The saliva samples will be processed to purify and extract DNA.
Subsequently, a PCR amplification will be performed to check the ApoE alleles and genotypes.
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9 months
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Cardiovascular factors in individuals with Alzheimer's disease and healthy subjects.
Time Frame: 9 months
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We will analyze whether there are significant differences between individuals with Alzheimer's disease and healthy subjects in terms of cardiovascular risk factors (Diabetes mellitus, cardiac pathology, hypercholesterolemia and high blood pressure) using the z-test for difference in proportions.
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9 months
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ApoE genotypes and cholesterol levels in the Alzheimer's disease population diagnosed in Castile and Leon.
Time Frame: 9 months
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To assess the presence of significant differences in the mean cholesterol values across different genotypes, an analysis of variance (ANOVA) test will be applied.
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9 months
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Collaborators and Investigators
Sponsor
Publications and helpful links
General Publications
- Alharbi KK, Syed R, Alharbi FK, Khan IA. Association of Apolipoprotein E Polymorphism with Impact on Overweight University Pupils. Genet Test Mol Biomarkers. 2017 Jan;21(1):53-57. doi: 10.1089/gtmb.2016.0190.
- Pantelidis P, Lambert-Hammill M, Wierzbicki AS. Simple sequence-specific-primer-PCR method to identify the three main apolipoprotein E haplotypes. Clin Chem. 2003 Nov;49(11):1945-8. doi: 10.1373/clinchem.2003.021683. No abstract available.
- Reales G, Hernandez CL, Dugoujon JM, Novelletto A, Cuesta P, Fortes-Lima C, Rodriguez JN, Calderon R. New insights into the distribution of APOE polymorphism in the Iberian Peninsula. The case of Andalusia (Spain). Ann Hum Biol. 2014 Sep-Oct;41(5):443-52. doi: 10.3109/03014460.2013.877966. Epub 2014 Feb 6.
- Eisenberg DT, Kuzawa CW, Hayes MG. Worldwide allele frequencies of the human apolipoprotein E gene: climate, local adaptations, and evolutionary history. Am J Phys Anthropol. 2010 Sep;143(1):100-11. doi: 10.1002/ajpa.21298.
- Reitz C, Mayeux R. Use of genetic variation as biomarkers for Alzheimer's disease. Ann N Y Acad Sci. 2009 Oct;1180:75-96. doi: 10.1111/j.1749-6632.2009.04945.x.
- Salameh TS, Rhea EM, Banks WA, Hanson AJ. Insulin resistance, dyslipidemia, and apolipoprotein E interactions as mechanisms in cognitive impairment and Alzheimer's disease. Exp Biol Med (Maywood). 2016 Sep;241(15):1676-83. doi: 10.1177/1535370216660770. Epub 2016 Jul 28.
- Gonzalez RD, Gomes I, Gomes C, Rocha R, Duraes L, Sousa P, Figueruelo M, Rodriguez M, Pita C, Hornero R, Gomez C, Lopes AM, Pinto N, Martins S. APOE Variants in an Iberian Alzheimer Cohort Detected through an Optimized Sanger Sequencing Protocol. Genes (Basel). 2020 Dec 22;12(1):4. doi: 10.3390/genes12010004.
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- ETICA-ULE-021-2022
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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