PMID- 26881476 OWN - NLM STAT- MEDLINE DCOM- 20161031 LR - 20181113 IS - 1744-7674 (Electronic) IS - 1354-3776 (Print) IS - 1354-3776 (Linking) VI - 26 IP - 3 DP - 2016 TI - Factor XIa inhibitors: A review of the patent literature. PG - 323-45 LID - 10.1517/13543776.2016.1154045 [doi] AB - INTRODUCTION: Anticoagulants are the mainstay for prevention and/or treatment of thrombotic disorders. Each clinically used anticoagulant is associated with significant adverse consequences, especially bleeding. Factor XIa (FXIa), a key factor involved in the amplification of procoagulation signal, has been suggested as a major target for anticoagulant drug discovery because of reduced risk of bleeding. AREAS COVERED: Our literature search uncovered dozens of industrial and academic patents on the discovery of novel FXIa/FXI inhibitors. Small peptidomimetics, sulfated glycosaminoglycan mimetics, polypeptides, antisense oligonucleotides, and monoclonal antibodies have been developed as inhibitors of FXIa. Although many agents are in early discovery/development phases, the activity and safety of a few have been evaluated in various animal models and in humans. EXPERT OPINION: FXIa is a promising drug target for development of effective anticoagulants with limited bleeding complications. Literature reveals a major trend in the number of patent applications over the last three years. These inhibitors exploit different approaches for target inhibition. Allosteric modulation of FXIa and biosynthetic inhibition of FXI are mechanistically unique. Despite initial results in patients undergoing knee anthroplasty as with antisense oligonucleotides, major advances should be realized, particularly with respect to pharmacokinetics, for FXI/FXIa inhibitors to enter the clinic. FAU - Al-Horani, Rami A AU - Al-Horani RA AD - a Department of Medicinal Chemistry & Institute for Structural Biology , Drug Discovery and Development, Virginia Commonwealth University , Richmond , VA 23219 , USA. FAU - Desai, Umesh R AU - Desai UR AD - a Department of Medicinal Chemistry & Institute for Structural Biology , Drug Discovery and Development, Virginia Commonwealth University , Richmond , VA 23219 , USA. LA - eng GR - R01 HL090586/HL/NHLBI NIH HHS/United States GR - HL090586/HL/NHLBI NIH HHS/United States GR - R25 HL128639/HL/NHLBI NIH HHS/United States GR - P01 HL107152/HL/NHLBI NIH HHS/United States GR - HL128639/HL/NHLBI NIH HHS/United States GR - HL107152/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Review PL - England TA - Expert Opin Ther Pat JT - Expert opinion on therapeutic patents JID - 9516419 RN - 0 (Anticoagulants) RN - EC 3.4.21.27 (Factor XIa) SB - IM MH - Animals MH - Anticoagulants/adverse effects/pharmacokinetics/*pharmacology MH - *Drug Design MH - Factor XIa/*antagonists & inhibitors MH - Hemorrhage/chemically induced MH - Humans MH - Patents as Topic MH - Thrombosis/drug therapy PMC - PMC4941829 MID - NIHMS799442 OTO - NOTNLM OT - FXI/FXIa OT - active site inhibitors OT - allosteric inhibitors OT - antisense oligonucleotides OT - drug discovery OT - enzyme inhibition OT - monoclonal antibodies OT - polypeptides OT - safe anticoagulant OT - thrombosis EDAT- 2016/02/18 06:00 MHDA- 2016/11/01 06:00 PMCR- 2017/01/01 CRDT- 2016/02/17 06:00 PHST- 2016/02/17 06:00 [entrez] PHST- 2016/02/18 06:00 [pubmed] PHST- 2016/11/01 06:00 [medline] PHST- 2017/01/01 00:00 [pmc-release] AID - 10.1517/13543776.2016.1154045 [doi] PST - ppublish SO - Expert Opin Ther Pat. 2016;26(3):323-45. doi: 10.1517/13543776.2016.1154045.