Proposed experiment from debate on Mitochondrial transfer between astrocytes and neurons

SUMMARY

# Proposed experiment from debate on Mitochondrial transfer between astrocytes and neurons ## Background and Rationale Mitochondrial transcription factor A (TFAM) is essential for mitochondrial DNA maintenance and respiratory function, making it a critical regulator of cellular energetics. During neurodegeneration, compromised mitochondrial function in neurons may trigger compensatory mitochondrial transfer from healthy astrocytes via tunneling nanotubes. This falsification experiment investigat

METHODOLOGY NOTES

**Phase 1: Cell Culture Preparation (Days 1-7)** • Culture primary astrocytes and neurons from P2-P3 rat pups in separate dishes • Transfect astrocytes with TFAM-overexpressing plasmid (pCMV-TFAM) or empty vector control using Lipofectamine 3000 • Verify TFAM overexpression by qPCR and Western blot at 48h post-transfection • Label astrocyte mitochondria with MitoTracker Red CMXRos (200 nM, 30 min) for tracking • Seed neurons at 50,000 cells/well in 24-well plates for co-culture experiments **Phase 2: ATP/ADP Ratio Manipulation (Day 8)** • Create ATP/ADP ratio conditions in astrocytes: High (glucose + pyruvate), Medium (glucose only), Low (2-deoxyglucose treatment) • Measure ATP/ADP ratios using luciferase-based assay (CellTiter-Glo) at 0, 2, 4, 6h • Create complementary energy states in neurons using oligomycin (low ATP) or rotenone treatment • Establish 6 co-culture conditions: High-Low, High-High, Medium-Low, Medium-Medium, Low-High, Low-Low ATP/ADP ratios **Phase 3: Co-culture and