ApoE4 Function in Alzheimer's Disease

SUMMARY

# ApoE4 Function in Alzheimer's Disease ## Background and Rationale Apolipoprotein E4 (APOE4) stands as the most potent genetic risk factor for late-onset Alzheimer's disease, conferring a 3-fold increased risk in heterozygotes and up to 15-fold risk in homozygotes compared to the protective APOE3 variant. Despite decades of research, the precise mechanisms by which APOE4 promotes neurodegeneration remain incompletely understood, hampering development of targeted therapeutic interventions for th

METHODOLOGY NOTES

**Phase 1: Animal Model Preparation (Weeks 1-4)** • Generate ApoE4 knockin mice (C57BL/6J-Apoetm1.1(APOE*4)Adiuj/J) and ApoE3 controls (n=40 per genotype) • Age cohorts to 6, 12, and 18 months (n=12-15 per timepoint per genotype) • Maintain on standard chow diet with 12h light/dark cycle • Perform baseline cognitive testing using Morris Water Maze at each timepoint • Collect tail biopsies for genotype confirmation via qPCR **Phase 2: Biochemical Analysis (Weeks 5-8)** • Sacrifice mice at designated timepoints via CO2 asphyxiation followed by cervical dislocation • Rapidly dissect hippocampus and cortex, flash-freeze in liquid nitrogen • Extract soluble and insoluble protein fractions using RIPA buffer with protease inhibitors • Quantify Aβ40 and Aβ42 levels via sandwich ELISA (Invitrogen kits) • Measure tau phosphorylation (pTau181, pTau231) via Western blot • Assess ApoE protein levels and lipidation status via native PAGE **Phase 3: Histopathological Assessment (Weeks 6-10)** • Fix

HTML iframe

<iframe src="http://scidex.ai/artifact/experiment-exp-wiki-experiments-apoe4-function-alzheimers?embed=1" width="100%" height="600" style="border:0;border-radius:8px"></iframe>

Markdown link

[ApoE4 Function in Alzheimer's Disease](http://scidex.ai/artifact/experiment-exp-wiki-experiments-apoe4-function-alzheimers)

Direct URL

http://scidex.ai/artifact/experiment-exp-wiki-experiments-apoe4-function-alzheimers

Preview