Tirbanibulin

Tirbanibulin, sold under the brand name Klisyri, is a medication for the treatment of actinic keratosis on the face or scalp.[1][2]

Tirbanibulin
Clinical data
Trade namesKlisyri
Other namesKX2-391
License data
Routes of
administration		Topical
Drug classMicrotubule inhibitor
ATC code
Legal status
Legal status
Identifiers
CAS Number
PubChem CID
DrugBank
ChemSpider
UNII
KEGG
ChEMBL
PDB ligand
CompTox Dashboard (EPA)
Chemical and physical data
FormulaC26H29N3O3
Molar mass431.536 g·mol−1
3D model (JSmol)

The most common side effects include local skin reactions, application site pruritus, and application site pain.[1][2]

Tirbanibulin was approved for medical use in the United States in December 2020.[2][3][4] The U.S. Food and Drug Administration (FDA) considers it to be a first-in-class medication.[5]

It functions as a mitotic inhibitor.[6]

Medical uses

Tirbanibulin is indicated for the topical treatment of actinic keratosis of the face or scalp.[1][2]

History

The U.S. Food and Drug Administration (FDA) approved tirbanibulin based on evidence from two clinical trials (Trial 1/ NCT03285477 and Trial 2/NCT03285490) of 702 adults with actinic keratosis on the face or scalp.[2] The trials were conducted at 62 sites in the United States.[2] Participants received once daily treatment with either tirbanibulin or inactive control ointment for 5 consecutive days to the single predetermined area where they had actinic keratosis.[2] Neither the participants nor the health care providers knew which treatment was being given until after the trial was completed.[2] The benefit of tirbanibulin in comparison to control was assessed after 57 days by comparing the percentage of participants who did not have any actinic keratosis on the treatment area (100% clearance).[2]

References
  1. "Klisyri- tirbanibulin ointment". DailyMed. Retrieved 8 January 2021.
  2. "Drug Trials Snapshot: Klisyri". U.S. Food and Drug Administration (FDA). 14 December 2020. Retrieved 8 January 2021. This article incorporates text from this source, which is in the public domain.
  3. "Drug Approval Package: Klisyri". U.S. Food and Drug Administration (FDA). 28 December 2020. Retrieved 8 January 2021.
  4. "Athenex Announces FDA Approval of Klisyri (Tirbanibulin) for the Treatment of Actinic Keratosis on the Face or Scalp" (Press release). Athenex Inc. 15 December 2020. Retrieved 15 December 2020 – via GlobeNewswire.
  5. "New Drug Therapy Approvals 2020". U.S. Food and Drug Administration (FDA). 31 December 2020. Retrieved 17 January 2021.
  6. Niu L, Yang J, Yan W, Yu Y, Zheng Y, Ye H, et al. (November 2019). "Reversible binding of the anticancer drug KXO1 (tirbanibulin) to the colchicine-binding site of β-tubulin explains KXO1's low clinical toxicity". The Journal of Biological Chemistry. 294 (48): 18099–18108. doi:10.1074/jbc.RA119.010732. PMID 31628188.
  • "Tirbanibulin". Drug Information Portal. U.S. National Library of Medicine.
  • Clinical trial number NCT03285477 for "A Multi-Center Study to Evaluate the Efficacy and Safety of KX2-391 Ointment 1% on AK on Face or Scalp (AK003)" at ClinicalTrials.gov
  • Clinical trial number NCT03285490 for "A Multi-Center Study to Evaluate the Efficacy and Safety of KX2-391 Ointment 1% on AK on Face or Scalp (AK004)" at ClinicalTrials.gov
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