From Wikipedia, the free encyclopedia
Brequinar Structural Formula V1.svg
Clinical data
Trade namesBrequinar
  • 6-fluoro-2-(2'-fluoro-1,1'-biphenyl-4-yl)-3-methyl-4-quinolinecarboxylic acid
CAS Number
PubChem CID
CompTox Dashboard (EPA)
Chemical and physical data
Molar mass375.4 g·mol−1
3D model (JSmol)
  • CC1=C(C2=C(C=CC(=C2)F)N=C1C3=CC=C(C=C3)C4=CC=CC=C4F)C(=O)O
  • InChI=1S/C23H15F2NO2/c1-13-21(23(27)28)18-12-16(24)10-11-20(18)26-22(13)15-8-6-14(7-9-15)17-4-2-3-5-19(17)25/h2-12H,1H3,(H,27,28)

Brequinar (DuP-785) is a drug that acts as a potent and selective inhibitor of the enzyme dihydroorotate dehydrogenase. It blocks synthesis of pyrimidine based nucleotides in the body and so inhibits cell growth. Brequinar was invented by DuPont Pharmaceuticals in the 1980s.[1] In 2001, Bristol-Myers Squibb acquired DuPont, and in 2017, Clear Creek Bio acquired the rights to brequinar from BMS.[2]

Brequinar has been investigated as an immunosuppressant for preventing rejection after organ transplant and also as an anti-cancer drug, but was not accepted for medical use in either application largely due to its narrow therapeutic dose range and severe side effects when dosed inappropriately.[3][4] It has been researched both as part of a potential combination therapy for some cancers,[5][6] or alternatively as an antiparasitic,[7] or antiviral drug.[8][9][10] Clear Creek Bio is currently developing brequinar as a potential treatment for COVID-19.[11]

Inhibition of dihydroorotate dehydrogenase activity by brequinar may represent an efficient approach to the elimination of undifferentiated cells for safe PSC‐derived differentiated cells based therapies.[12]

See also[edit]


  1. ^ Dexter, D. L.; Hesson, D. P.; Ardecky, R. J.; Rao, G. V.; Tippett, D. L.; Dusak, B. A.; Paull, K. D.; Plowman, J.; DeLarco, B. M.; Narayanan, V. L. (November 1985). "Activity of a novel 4-quinolinecarboxylic acid, NSC 368390 [6-fluoro-2-(2'-fluoro-1,1'-biphenyl-4-yl)-3-methyl-4-quinolinecarb oxylic acid sodium salt], against experimental tumors". Cancer Research. 45 (11 Pt 1): 5563–5568. ISSN 0008-5472. PMID 4053030.
  2. ^ "Bristol Myers Squibb Company History Timeline". May 3, 2022.{{cite web}}: CS1 maint: url-status (link)
  3. ^ Cramer DV (1995). "Brequinar sodium". Pediatric Nephrology. 9 Suppl: S52-5. doi:10.1007/bf00867685. PMID 7492488. S2CID 28974570.
  4. ^ Peters GJ (2018). "Re-evaluation of Brequinar sodium, a dihydroorotate dehydrogenase inhibitor". Nucleosides, Nucleotides & Nucleic Acids. 37 (12): 666–678. doi:10.1080/15257770.2018.1508692. PMID 30663496.
  5. ^ Vyas VK, Ghate M (October 2011). "Recent developments in the medicinal chemistry and therapeutic potential of dihydroorotate dehydrogenase (DHODH) inhibitors". Mini Reviews in Medicinal Chemistry. 11 (12): 1039–55. doi:10.2174/138955711797247707. PMID 21861807.
  6. ^ Madak JT, Bankhead A, Cuthbertson CR, Showalter HD, Neamati N (March 2019). "Revisiting the role of dihydroorotate dehydrogenase as a therapeutic target for cancer". Pharmacology & Therapeutics. 195: 111–131. doi:10.1016/j.pharmthera.2018.10.012. PMID 30347213. S2CID 53036782.
  7. ^ Boschi D, Pippione AC, Sainas S, Lolli ML (December 2019). "Dihydroorotate dehydrogenase inhibitors in anti-infective drug research". European Journal of Medicinal Chemistry. 183: 111681. doi:10.1016/j.ejmech.2019.111681. PMID 31557612.
  8. ^ Li SF, Gong MJ, Sun YF, Shao JJ, Zhang YG, Chang HY (August 2019). "Antiviral activity of brequinar against foot-and-mouth disease virus infection in vitro and in vivo". Biomedicine & Pharmacotherapy. 116: 108982. doi:10.1016/j.biopha.2019.108982. PMID 31146110.
  9. ^ Andersen PI, Krpina K, Ianevski A, Shtaida N, Jo E, Yang J, et al. (October 2019). "Novel Antiviral Activities of Obatoclax, Emetine, Niclosamide, Brequinar, and Homoharringtonine". Viruses. 11 (10): 964. doi:10.3390/v11100964. PMC 6832696. PMID 31635418.
  10. ^ Park JG, Ávila-Pérez G, Nogales A, Blanco-Lobo P, de la Torre JC, Martínez-Sobrido L (January 2020). "Identification and characterization of novel compounds with broad spectrum antiviral activity against influenza A and B viruses". Journal of Virology. 94 (7). doi:10.1128/JVI.02149-19. PMC 7081893. PMID 31941776.
  11. ^ "Clear Creek Bio Doses First Patient in Phase 2 Outpatient Study of Brequinar to Treat COVID-19". November 20, 2020.{{cite web}}: CS1 maint: url-status (link)
  12. ^ Kondo, T (October 2021). "Selective eradication of pluripotent stem cells by inhibiting DHODH activity". Stem Cells. 39 (1): 33–42. doi:10.1002/stem.3290. hdl:2115/82146. PMID 33038285. S2CID 222280648.