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APOE4–Icahn School of Medicine at Mount Sinai

Researchers have successfully used an experimental gene therapy to convert the high-risk APOE4 Alzheimer's gene into the safer APOE3 variant in human cells. Concurrently, scientists discovered how APOE4 actively damages brain blood vessels, revealing a reversible mechanism that could lead to new treatments.

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Researchers are developing new methods to target and neutralize the APOE4 gene, the strongest genetic risk factor for Alzheimer's disease.From: Gene Therapy Converts High-Risk APOE4 Gene to Low-Risk APOE3 in Alzheimer's Patient Cells

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The experimental therapy targets and converts the APOE4 gene signature without disrupting the surrounding DNA.From: Gene Therapy Converts High-Risk APOE4 Gene to Low-Risk APOE3 in Alzheimer's Patient Cells ·
Blocking the TGF-β pathway reverses the cellular transformation, restoring vessel health and clearing amyloid buildup.From: APOE4 Gene Actively Damages Brain Vessels in Alzheimer's, Mechanism Shown to Be Reversible by Blocking TGF-β Signaling ·
APOE4 has been shown to actively damage the brain's vasculature by converting support cells into scar tissue.From: Gene Therapy Converts High-Risk APOE4 Gene to Low-Risk APOE3 in Alzheimer's Patient Cells ·
Researchers utilized 3D stem cell-derived 'miBrains' to model the vascular damage and test the TGF-β inhibitors.From: APOE4 Gene Actively Damages Brain Vessels in Alzheimer's, Mechanism Shown to Be Reversible by Blocking TGF-β Signaling ·

Timeline

September 2026

  1. Gene Therapy Converts High-Risk APOE4 Gene to Low-Risk APOE3 in Alzheimer's Patient Cells
  2. APOE4 Gene Actively Damages Brain Vessels in Alzheimer's, Mechanism Shown to Be Reversible by Blocking TGF-β Signaling