Core Framework & Diagram What Is Immune Reprogramming?

A single BCG exposure leaves a lasting chemical mark on immune cell genes, keeping them primed for faster responses months or years later — the same principle lets engineers dial a CAR-T cell toward a longer-lasting ‘memory’ state instead of burning out fast.

Engineers can now stack multiple rule changes into one cell at once — removing a brake, boosting persistence, and requiring two separate signals before it’s allowed to act.

Changing which fuel pathway a cell relies on reshapes its behavior directly — a fasting-linked ketone molecule calms a specific inflammation trigger, while shifting T cells toward efficient fuel use makes them last longer after infusion.

The most drastic option: wipe out the entire immune system and rebuild it from stem cells. In severe autoimmune disease, this has produced long-term remission beyond any other treatment — but carries real risk, including 1–5% mortality from the procedure itself.