Genome editing

Base editors (CBE/ABE) make single-nucleotide changes C·G→T·A and A·T→G·C without double-strand breaks — treating monogenic disease (sickle cell, beta-thalassemia) at up to 90% efficiency with no indels.

Turning genes on or off by rewriting DNA methylation and histone marks with dCas9 fusion proteins or zinc fingers — no DNA sequence change, but an effect that can be inherited across cell divisions.

Programmable genome editors — CRISPR-Cas9, base editors and prime editors — delivered ex vivo or in vivo via lipid nanoparticles to treat genetic disease, from the first approved CRISPR therapy Casgevy to in-vivo redosable CRISPR and single-dose cardiovascular base editing.

Search-and-replace genome editing with a Cas9 nickase fused to a reverse transcriptase and an extended pegRNA — writing all 12 base substitutions and small indels without a double-strand break.

Engineered oligonucleotides that recruit the cell's endogenous ADAR enzymes to rewrite a pathogenic adenosine to inosine on disease transcripts — a reversible, titratable alternative to DNA editing now in clinical validation, with Wave's WVE-006 (AATD, RestorAATion-2) the lead asset and ProQR's Axiomer platform delivering the first clinical proof of mechanism.