Target

HDAC3

Histone deacetylase 3

As of the edition of 20 October 2026, HDAC3 (histone deacetylase 3, UniProt O15379) has 4 drugs tested at it and 6 companies on the list, 2 on route A and 1 on route B.

Sources: UniProt, ClinicalTrials.gov, ChEMBL, FDA Orange Book and Purple Book, Pharos.

The protein

UniProt
O15379
How well studied
Drug target: an approved drug acts on it
Where it sits in the cell
Inside the cell
Solved structures
1
Disease areas
Cancer; Blood and lymph; Immune system; Skin and connective tissue; Lungs and airways; Urinary and reproductive; Digestive system; Nervous system
Registered trials of its drugs
476

Drugs at this target

StatusCount
Marketed2
Stopped2
Total4
DrugStatusFurthest phaseUS protection
VorinostatMarketedPhase 3Ends 2027
TucidinostatMarketedPhase 4none listed
NanatinostatStoppedPhase 2none listed
MTX110StoppedPhase 1none listed

4 of 4 drugs, the most tested first.

Companies at this target

Where the company standsCompanies
Route A2
Route B1
Engaged2
Undetermined1
Total on the list6
Three companies on route A or B, with the route only
CompanyRoute
Merck & Co.Route B
Viracta TherapeuticsRoute A
Biodexa PharmaceuticalsRoute A

The other 3 companies at HDAC3

In the product

6 companies in all; 3 are not named here, and no score is.

See the 6 companies at HDAC3, ranked, with the facts behind eachRequest access. Nothing is shown until you do.