biology

CAR-T therapy is personalized medicine in the most literal sense: your own cells, genetically reprogrammed, reinfused as a living drug. For some cancers, a single infusion produces complete remission. For others, the story is more complicated.

The mRNA vaccines deployed in 2020 weren't invented in 2020. They were built on Katalin Karikó's decade of unfunded, career-threatening research into modified nucleosides. COVID was the proof-of-concept — but the technology now points at cancer vaccines, HIV, and rare genetic diseases.

The Central Dogma cast RNA as a middleman: DNA sends a message, RNA carries it, proteins do the work. That picture is incomplete. Most of the genome transcribes RNA that never becomes protein — and those non-coding RNAs turn genes on and off and run regulatory networks of startling complexity.

The central dogma reduced RNA to a photocopy of DNA on its way to becoming protein. That picture is now obsolete. Non-coding RNAs regulate gene expression, splice transcripts, silence transposons, and sense cellular conditions — RNA is closer to an operating system than a courier.

lncRNAs were once dismissed as transcriptional noise. We now know they scaffold chromatin architecture, silence whole chromosomes (X-inactivation runs on one), and regulate development. The dark matter of the genome is turning on lights.

Every cell has a built-in mechanism for destroying specific RNA sequences — and Andrew Fire and Craig Mello figured out how to hijack it. RNA interference lets researchers silence virtually any gene on demand, a capability that's now moving from the lab into approved drugs.