Theorist position for analysis a7f528aa-20c4-409d-a8c3-e2662850e63d: VEGF Family GWAS Signals and Cerebrovascular-Neuronal Coupling in AD Hippocampus
Source basis: Association of ten VEGF family genes with Alzheimer's disease endophenotypes at single cell level (Alzheimer's & Dementia, 2025, DOI 10.1002/alz.14419). The stored gap context says: VEGF family single-cell GWAS analysis identified associations with AD endophenotypes; the causal mechanism linking VEGF variants to hippocampal vascular-neuronal coupling was highlighted as requiring investigation.
Primary hypothesis: VEGF-family genetic control of vascular-neuronal coupling in vulnerable hippocampal regions is not merely an associated signature; it is a testable mechanism that can explain the open question: How do VEGF family gene variants identified by single-cell GWAS analysis alter cerebrovascular-neuronal coupling specifically in the AD hippocampus, and can spatial transcriptomics resolve whether VEGF-driven vascular dysfunction precedes or follows amyloid deposition in vulnerable hippocampal subfields?
Three candidate claims should be carried forward. First, the strongest causal signal should appear in the cell type or tissue compartment named by the question, not only in bulk disease contrasts. Second, perturbing the axis should shift a proximal molecular phenotype before it shifts a late pathology phenotype, which would help separate cause from consequence. Third, the relevant readout should be stratified by VEGF, GWAS, VEGF-, because collapsing across those terms would erase the mechanism the analysis is trying to test.
The priority experiment is spatial transcriptomics plus vascular imaging ordered against amyloid and tau burden across hippocampal subfields. A positive result would require concordance across human observational data, disease-relevant cellular models, and at least one perturbation that moves the predicted proximal readout in the expected direction.