Metal Ion Homeostasis Dysregulation in Alzheimer's Disease

SUMMARY

# Metal Ion Homeostasis Dysregulation in Alzheimer's Disease ## Background and Rationale Metal ion homeostasis dysregulation represents a critical intersection between biochemical processes and neurodegeneration in Alzheimer's disease, offering profound insights into disease mechanisms that extend far beyond the traditional amyloid cascade hypothesis. This comprehensive validation study addresses fundamental questions about how disrupted copper, zinc, and iron metabolism contributes to the patho

METHODOLOGY NOTES

**Phase 1: Patient Recruitment and Sample Collection (Months 1-6)** • Recruit 120 participants: 40 AD patients (MMSE 10-24), 40 MCI patients (MMSE 24-27), 40 healthy controls (MMSE >27) • Obtain informed consent and conduct comprehensive neuropsychological assessment • Collect cerebrospinal fluid (15ml via lumbar puncture), plasma (30ml), and serum (15ml) samples • Store samples at -80°C within 2 hours of collection • Record demographics, APOE genotyping, medication history, and cognitive scores **Phase 2: Metal Ion Quantification (Months 3-8)** • Measure copper, zinc, and iron concentrations in CSF and plasma using inductively coupled plasma mass spectrometry (ICP-MS) • Determine free vs bound metal ion ratios using ultrafiltration and size exclusion chromatography • Analyze ceruloplasmin, transferrin, and metallothionein protein levels via ELISA • Assess metal-binding capacity of CSF and plasma samples using competitive binding assays • Perform quality control with certified referen