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Philpott CD, Ernst NE, Makley AT, Wasky PR, Mueller EW. Case Report: Extended Duration Andexanet Alfa Infusion in a Surgical Trauma Patient. J Pharm Pract 2023; 36:1002-1007. [PMID: 35227117 DOI: 10.1177/08971900221078779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Background: Andexanet alfa (andexanet) is the only FDA-approved medication for reversal of apixaban and rivaroxaban anticoagulation for life-threatening or uncontrolled bleeding. Infusion modifications may be required in surgical patients undergoing prolonged operative intervention but have not previously been described. Case Report: A 78-year-old woman on rivaroxaban for atrial fibrillation was admitted to the trauma service for a mechanical fall, sustaining a T4 burst fracture with severe canal stenosis and spinal cord edema resulting in loss of strength and sensation in her legs. Clinically relevant rivaroxaban activity was verified with an elevated low molecular weight heparin anti-factor Xa assay, and laboratory confirmed coagulopathy was demonstrated by a prolonged prothrombin time, thromboelastography (TEG) R-time, and activated clotting time (ACT). The patient required urgent surgical intervention for spinal fixation. Given the expected prolonged duration of the procedure, standard dose andexanet was initiated with a prolonged infusion at half the standard rate during the operation. The procedure was successful and intraoperative TEGs demonstrated normalization of R-time and ACT throughout the procedure. The patient did not experience any complications postoperatively and successfully discharged to inpatient rehabilitation. Conclusion: Modifications to the andexanet infusion may be required in surgical patients requiring rivaroxaban reversal for a prolonged procedure. Further data are needed to determine the optimal approach to infusion modification.
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Affiliation(s)
- Carolyn D Philpott
- Clinical Pharmacy Specialist, Trauma, Surgery, Orthopedics, UC Health - University of Cincinnati Medical Center, Cincinnati, OH
| | - Neil E Ernst
- Clinical Pharmacy Specialist, Critical Care, UC Health - University of Cincinnati Medical Center, Cincinnati, OH
| | - Amy T Makley
- Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Peter R Wasky
- Department of Orthopaedics & Sports Medicine, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Eric W Mueller
- Clinical Pharmacy Specialist, Trauma, Surgery, Orthopedics, UC Health - University of Cincinnati Medical Center, Cincinnati, OH
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2
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Liu J, Elsamadisi P, Philips E, Bauer KA, Eche IM. Four-factor prothrombin complex concentrate plus andexanet alfa for reversal of factor Xa inhibitor-associated bleeding: Case series. Am J Health Syst Pharm 2022; 79:1323-1329. [PMID: 35291008 DOI: 10.1093/ajhp/zxac079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
DISCLAIMER In an effort to expedite the publication of articles related to the COVID-19 pandemic, AJHP is posting these manuscripts online as soon as possible after acceptance. Accepted manuscripts have been peer-reviewed and copyedited, but are posted online before technical formatting and author proofing. These manuscripts are not the final version of record and will be replaced with the final article (formatted per AJHP style and proofed by the authors) at a later time. PURPOSE To manage factor Xa (FXa) inhibitor-associated bleeding, andexanet alfa or 4-factor prothrombin concentrate (4F-PCC) has been used to restore hemostasis. However, literature on the outcomes for patients who received both andexanet alfa and 4F-PCC is limited. SUMMARY We report a case series of 5 patients who received andexanet alfa plus 4F-PCC for reversal of FXa inhibitor-associated bleeding. Patients were included in this case series if they received both andexanet alfa and 4F-PCC for reversal of FXa inhibitor-associated bleeding. They were followed to either discharge or death, and in-hospital complications related to concurrent use of andexanet alfa and 4F-PCC were documented. We report an incidence of thromboembolism of 40% (2 of 5 cases) and an in-hospital mortality rate of 60% (3 of 5 cases). Taking these cases together with those in the existing literature, we found a total of 23 reported cases of safety outcomes with andexanet alfa plus 4F-PCC. The overall incidence of thromboembolism was 35% (8 of 23 cases). CONCLUSION This case series adds to the limited literature describing the outcomes for patients receiving andexanet alfa plus 4F-PCC. We encourage other institutions to report safety data on administering both agents.
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Affiliation(s)
- JiTong Liu
- Department of Pharmacy, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Pansy Elsamadisi
- Department of Pharmacy, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Eli Philips
- Department of Pharmacy, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Kenneth A Bauer
- Division of Hematology, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Ifeoma M Eche
- Department of Pharmacy, Beth Israel Deaconess Medical Center, Boston, MA, USA
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Favaloro EJ, Gilmore G, Bonar R, Dean E, Arunachalam S, Mohammed S, Baker R. Laboratory testing for activated protein C resistance: rivaroxaban induced interference and a comparative evaluation of andexanet alfa and DOAC Stop to neutralise interference. Clin Chem Lab Med 2021; 58:1322-1331. [PMID: 32126010 DOI: 10.1515/cclm-2019-1160] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Accepted: 01/08/2020] [Indexed: 11/15/2022]
Abstract
Background Investigation of hemostasis is problematic when patients are on anticoagulant therapy. Rivaroxaban especially causes substantial interference, extending many clot-based tests, thereby leading to false positive or negative events. In particular, rivaroxaban affects some assays for activated protein C resistance (APCR). Methods We assessed, in an international setting, cross laboratory (n = 31) testing using four samples to evaluate rivaroxaban induced interference in APCR testing, and whether this interference could be neutralised. The samples comprised: (A) pool of normal plasma (APCR-negative control); (B) this normal pool spiked with rivaroxaban (200 ng/mL) to create rivaroxaban-induced interference (potential 'false' positive APCR event sample); (C) the rivaroxaban sample subsequently treated with a commercial direct oral anticoagulant 'DOAC-neutraliser' (DOAC Stop), or (D) treated with andexanet alfa (200 μg/mL). Testing was performed blind to sample type. Results The rivaroxaban-spiked sample generated false positive APCR results for some, but unexpectedly not most APCR-tests. The sample treated with DOAC Stop evidenced a correction in the rivaroxaban-affected APCR assays, and did not otherwise adversely affect the rivaroxaban 'unaffected' APCR assays. The andexanet alfa-treated sample did not evidence correction of the false positive APCR, and instead unexpectedly exacerbated false positive APCR status with many tests. Conclusions DOAC Stop was able to neutralise any APCR interference induced by rivaroxaban. In contrast, andexanet alfa did not negate such interference, and instead unexpectedly created more false-positive APCR events.
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Affiliation(s)
- Emmanuel J Favaloro
- Department of Laboratory Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), NSW Health Pathology, Westmead Hospital, Westmead, NSW 2145, Australia
- Sydney Centres for Thrombosis and Haemostasis, Westmead Hospital, Westmead, NSW, Australia
| | - Grace Gilmore
- Western Australian Centre for Thrombosis and Haemostasis (WACTH), Murdoch University, Perth, WA, Australia
| | - Roslyn Bonar
- Royal College of Pathologists of Australasia Quality Assurance Program (RCPAQAP), St Leonards, NSW, Australia
| | - Elysse Dean
- Royal College of Pathologists of Australasia Quality Assurance Program (RCPAQAP), St Leonards, NSW, Australia
| | - Sandya Arunachalam
- Royal College of Pathologists of Australasia Quality Assurance Program (RCPAQAP), St Leonards, NSW, Australia
| | - Soma Mohammed
- Department of Laboratory Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), NSW Health Pathology, Westmead Hospital, Westmead, NSW, Australia
| | - Ross Baker
- Western Australian Centre for Thrombosis and Haemostasis (WACTH), Murdoch University, Perth, WA, Australia
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Bourdin M, Perrotin D, Mathieu O, Herve T, Depasse F, Lu G, Conley PB, Contant G. Measuring residual anti-Xa activity of direct factor Xa inhibitors after reversal with andexanet alfa. Int J Lab Hematol 2021; 43:795-801. [PMID: 34092030 PMCID: PMC8453859 DOI: 10.1111/ijlh.13591] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/26/2021] [Accepted: 04/28/2021] [Indexed: 11/28/2022]
Abstract
Introduction Andexanet alfa (AnXa) was developed for anticoagulant effect reversal of direct factor Xa inhibitors (DXaI) (apixaban, rivaroxaban, edoxaban) in emergency situations. Regular anti‐Xa assays are not suitable to evaluate anti‐Xa activity after AnXa administration because of the high sample dilution resulting in the AnXa‐DXaI dissociation which gives inaccurately high DXaI measured concentrations. This study aimed at developing dedicated STA‐Liquid anti‐Xa test set‐ups for accurately measuring DXaI after reversal with AnXa. Methods Modified anti‐Xa test set‐ups, with reduced sample dilution, were developed to overcome regular assays limitations and to improve measured accuracy with results comparable to Portola microplate reference method used in clinical studies. Both regular and optimized assays were used to measure DXaI concentration in AnXa‐containing samples. Quality controls, normal pooled plasma spiked with five DXaI and three AnXa concentrations, samples from DXaI‐treated patients spiked with AnXa and ex vivo healthy volunteers having received both DXaI and AnXa were used. Results The lower limit of quantitation of optimized anti‐Xa assays was <10 ng/mL with CVs ≤10%. DXaI samples containing 300 ng/mL and 1 µmol/L AnXa resulted in DXaI residual concentrations of 29‐72 ng/mL depending on the DXaI (76%‐90% reversal), compared to 20‐28 ng/mL with reference method (92%‐94% reversal) and 135‐165 ng/mL with regular assays (about 50% reversal). Conclusion Modified test set‐ups are automated alternative to reference method with improved precision and reproducibility. They can be run in all laboratories where regular anti‐Xa assays are performed using commercially available reagents.
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Affiliation(s)
| | | | | | - Tristan Herve
- Diagnostica Stago Clinical and Pharmaceutical Development, Asnières-sur-Seine, France
| | - François Depasse
- Diagnostica Stago Clinical and Pharmaceutical Development, Asnières-sur-Seine, France
| | - Genmin Lu
- Portola, a subsidiary of Alexion, South San Francisco, CA, USA
| | - Pamela B Conley
- Portola, a subsidiary of Alexion, South San Francisco, CA, USA
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5
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Lu G, Lin J, Bui K, Curnutte JT, Conley PB. Andexanet versus prothrombin complex concentrates: Differences in reversal of factor Xa inhibitors in in vitro thrombin generation. Res Pract Thromb Haemost 2020; 4:1282-1294. [PMID: 33313467 PMCID: PMC7695565 DOI: 10.1002/rth2.12418] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/19/2020] [Accepted: 06/23/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Andexanet alfa (andexanet) is a modified human factor Xa (FXa) approved for anticoagulation reversal in patients with life-threatening bleeding treated with rivaroxaban or apixaban. Four-factor prothrombin complex concentrates (4F-PCCs) are approved for reversal of vitamin K antagonist-induced anticoagulation but not FXa inhibitors. The mechanism and effectiveness of 4F-PCCs for FXa inhibitor reversal are unclear. OBJECTIVE To investigate the mechanism and impact of 4F-PCCs on reversal of rivaroxaban and apixaban in vitro compared to andexanet. METHODS The effect of 4F-PCCs (or individual factors) on tissue factor-initiated thrombin generation (TF-TG) was evaluated in human plasma, with or without rivaroxaban or apixaban, and compared with andexanet under the same conditions. RESULTS In the TF-TG assay, 4F-PCC completely reversed warfarin anticoagulation. Andexanet normalized TF-TG over a wide range of apixaban and rivaroxaban concentrations tested (19-2000 ng/mL). However, 4F-PCC (or individual factors) was unable to normalize endogenous thrombin potential (ETP) or peak thrombin (Peak) in the presence of apixaban or rivaroxaban (75-500 ng/mL). TF-TG was only normalized by 4F-PCC at inhibitor concentrations <75 ng/mL (ETP) or <37.5 ng/mL (Peak). These data can be explained by the estimated thresholds of FXa activity required to support normal TF-TG based on the inhibitor:FXa ratios and levels of uninhibited FXa. The data are consistent with healthy volunteer studies where TF-TG is not normalized until inhibitor levels are substantially decreased. CONCLUSIONS Both the theoretical calculations and experimental data demonstrated that 4F-PCCs are only able to normalize TG over a low and narrow range of FXa inhibitor concentrations (<75 ng/mL).
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Affiliation(s)
- Genmin Lu
- Research BiologyPortola Pharmaceuticals, Inc.South San FranciscoCAUSA
| | - Joyce Lin
- Research BiologyPortola Pharmaceuticals, Inc.South San FranciscoCAUSA
| | - Khanh Bui
- Research BiologyPortola Pharmaceuticals, Inc.South San FranciscoCAUSA
| | - John T. Curnutte
- Research BiologyPortola Pharmaceuticals, Inc.South San FranciscoCAUSA
| | - Pamela B. Conley
- Research BiologyPortola Pharmaceuticals, Inc.South San FranciscoCAUSA
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6
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Stevens VM, Trujillo T, Mueller SW, MacLaren R, Reynolds PM, Kiser TH. Coagulation Factor Xa (Recombinant), Inactivated-Zhzo ( Andexanet Alfa) Hemostatic Outcomes and Thrombotic Event Incidence at an Academic Medical Center. Clin Appl Thromb Hemost 2020; 25:1076029619896619. [PMID: 31876159 PMCID: PMC7019392 DOI: 10.1177/1076029619896619] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Andexanet alfa is approved for the reversal of factor Xa inhibitors in patients with major bleeding events. We aimed to review the incidence of effective hemostasis with andexanet alfa in a real-world environment. This retrospective cohort included patients hospitalized for a major bleed that resulted in andexanet alfa administration. The primary outcome was effective hemostasis at 12 hours after andexanet alfa treatment. Thromboembolic events and mortality within 30 days were also assessed. Over a 14-month period, 13 patients received andexanet alfa with a mean age of 69 ± 10 years, 54% male, 69% exposed to apixaban (31% rivaroxaban), and had intracranial (46%) and nonintracranial (54%) bleeding sites. Effective hemostasis was observed in 10 (77%) patients. Four (31%) patients experienced 5 thromboembolic events with a median time to event of 6.5 days (range: 0.5-29). Four thrombotic events occurred during the period in which anticoagulation (prophylaxis or therapeutic) was not restarted. Mortality rate was 15%. Andexanet alfa was effective in obtaining hemostasis in a majority of patients. However, the incidence of thromboembolic events was high and may be attributed to a delay in restarting anticoagulation.
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Affiliation(s)
- Victoria M Stevens
- Department of Clinical Pharmacy, University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO, USA
| | - Toby Trujillo
- Department of Clinical Pharmacy, University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO, USA
| | - Scott W Mueller
- Department of Clinical Pharmacy, University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO, USA
| | - Robert MacLaren
- Department of Clinical Pharmacy, University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO, USA
| | - Paul M Reynolds
- Department of Clinical Pharmacy, University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO, USA
| | - Tyree H Kiser
- Department of Clinical Pharmacy, University of Colorado Skaggs School of Pharmacy and Pharmaceutical Sciences, Aurora, CO, USA
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Abstract
OBJECTIVES Despite the availability of FDA-labeled anticoagulant reversal agents, there is considerable variability in clinical practice as to the regimen and agent used for reversal. The objective of this study was to characterize the current practices of pharmacists surrounding the reversal of anticoagulant-associated life-threatening hemorrhage. Methods: A cross-sectional analysis of critical care and emergency medicine pharmacists. Current practice was compared for the type of hospital, country region, and type of ordering physician. In addition, pharmacists were asked to rank their involvement with activities involved with the reversal of anticoagulants. Respondents ranked their involvement with these activities as either never involved, rarely involved, occasionally involved, frequently involved, or always involved. Results:281 respondents were included. The majority used 4-factor PCC for warfarin reversal (92.9%) and factor Xa inhibitor reversal (79.7%). However, only 58.7% used the labeled dose of 4-PCC for warfarin reversal. Of the 30.6% that utilized a fixed-dose regimen, the most common regimen was 1500 units once. A higher proportion of respondents practicing in a teaching hospital reported that they used activated prothrombin complex concentrates for reversal of factor Xa inhibitor (22 [12.2%] vs. 5 [5%]; p < 0.05) or coagulation factor Xa (recombinant)-inactivated-zhzo (31 [17.2%] vs. 5 [5%]; p < 0.05). In addition, the majority of respondents utilized idarucizumab for dabigatran reversal. The only involvement activity in which <50% of respondents said they were frequently involved or always involved was 'administration of reversal agent.' Conclusions: There is considerable variability in which agents were utilized for anticoagulant-associated bleeding reversal.
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Affiliation(s)
- A Shaun Rowe
- Department of Clinical Pharmacy and Translational Science, College of Pharmacy, University of Tennessee Health Science Center , Knoxville, TN, USA
| | - Scott Dietrich
- Department of Pharmacy, University of Colorado Health, North Region , Colorado Springs, CO, USA
| | - Leslie A Hamilton
- Department of Clinical Pharmacy and Translational Science, College of Pharmacy, University of Tennessee Health Science Center , Knoxville, TN, USA
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8
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Andexxa--an antidote for apixaban and rivaroxaban. Med Lett Drugs Ther 2018; 60:99-101. [PMID: 29913471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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9
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Shaw JR, Siegal DM. Pharmacological reversal of the direct oral anticoagulants-A comprehensive review of the literature. Res Pract Thromb Haemost 2018; 2:251-265. [PMID: 30046727 PMCID: PMC6055488 DOI: 10.1002/rth2.12089] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 01/31/2018] [Indexed: 11/11/2022] Open
Abstract
The direct oral anticoagulants (DOACs) are used for stroke prevention in atrial fibrillation (SPAF) and the prevention and treatment of venous thromboembolic disease (VTE). Although DOAC-associated bleeding events are less frequent as compared to vitamin K antagonists, there is significant concern surrounding physicians' ability to evaluate and manage DOAC-associated bleeding when it does occur. Idarucizumab is a specific reversal agent for dabigatran and is the agent of choice for dabigatran reversal in the setting of major bleeding or urgent surgery/procedures. There are no commercially available specific reversal agents for the direct Xa inhibitors. Although they have not been rigorously studied in DOAC-treated patients requiring urgent anticoagulant reversal, limited evidence from in vitro studies, animal bleeding models, human volunteer studies (in vivo and in vitro) and case series suggest that coagulation factor replacement with prothrombin complex concentrate (PCC) and activated PCC (FEIBA) may contribute to hemostasis. However, the safety and efficacy of these agents and the optimal dosing strategies remain uncertain.
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Affiliation(s)
- Joseph R Shaw
- Division of Hematology Department of Medicine The Ottawa Hospital Ottawa ON Canada.,Ottawa Hospital Research Institute Ottawa ON Canada.,Faculty of Medicine University of Ottawa Ottawa ON Canada
| | - Deborah M Siegal
- Division of Hematology and Thromboembolism Department of Medicine McMaster University Hamilton ON Canada.,Population Health Research Institute McMaster University Hamilton ON Canada
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10
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Lu G, Hollenbach SJ, Baker DC, Tan S, Hutchaleelaha A, Curnutte JT, Conley PB. Preclinical safety and efficacy of andexanet alfa in animal models. J Thromb Haemost 2017; 15:1747-1756. [PMID: 28682477 DOI: 10.1111/jth.13768] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Indexed: 02/04/2023]
Abstract
Essentials There is currently no approved reversal agent for factor Xa (FXa) inhibitors Andexanet alfa has been developed to reverse the anticoagulant effects of FXa inhibitors Andexanet reduced blood loss and anticoagulation markers in rivaroxaban-anticoagulated rabbits Andexanet was well tolerated in monkeys and rats, with no evidence of prothrombotic activity SUMMARY: Background Andexanet alfa is a recombinant modified form of factor Xa (FXa), designed to bind to and reverse the anticoagulant activity of FXa inhibitors. Objectives To evaluate the ability of andexanet to reverse the anticoagulant activity of rivaroxaban, and assess its pharmacokinetics (PK) and toxicity in animal models. Methods The effects of andexanet on blood loss, anti-FXa activity, rivaroxaban unbound plasma concentrations and other coagulation parameters were assessed in a rabbit liver laceration 'treatment' model. Andexanet was administered 10 min after blood loss was initiated. The toxicity of repeated administration of andexanet (up to 60 mg kg-1 day-1 ) was assessed in cynomolgus monkeys. PK parameters were evaluated in rats and monkeys. Results Excess blood loss due to anticoagulation with rivaroxaban was significantly decreased by a single intravenous bolus administration of andexanet at 35 and 75 mg per rabbit, by 75% and 63%, respectively. This correlated with dose-dependent decreases in the unbound fraction of rivaroxaban and anti-FXa activity. Co-administration of rivaroxaban had no significant impact on the PK parameters of andexanet. Andexanet (up to 60 mg kg-1 day-1 ) was well tolerated in monkeys, with no accumulation of andexanet or rivaroxaban. There was a single occurrence of anaphylaxis, which resolved after treatment with diphenhydramine and epinephrine. There was no histological evidence of prothrombotic activity with high-dose andexanet compared with vehicle control, as measured by clot and fibrin deposition in all major organs. Conclusions These data suggest that andexanet is a promising therapy for the reversal of FXa inhibitor-induced anticoagulation, supporting clinical studies in humans.
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Affiliation(s)
- G Lu
- Portola Pharmaceuticals Inc., South San Francisco, CA, USA
| | - S J Hollenbach
- Portola Pharmaceuticals Inc., South San Francisco, CA, USA
| | - D C Baker
- Portola Pharmaceuticals Inc., South San Francisco, CA, USA
| | - S Tan
- Portola Pharmaceuticals Inc., South San Francisco, CA, USA
| | | | - J T Curnutte
- Portola Pharmaceuticals Inc., South San Francisco, CA, USA
| | - P B Conley
- Portola Pharmaceuticals Inc., South San Francisco, CA, USA
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11
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Abstract
Despite direct oral anticoagulants becoming a mainstay of anticoagulant therapy, the effective, timely, and safe reversal of their anticoagulant effect remains challenging. Emerging evidence attests that andexanet, a recombinant and inactive variant of native factor X (FXa), competitively inhibits and counteracts the anticoagulant effect of many inhibitors of native activated FXa.
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Affiliation(s)
- Giuseppe Lippi
- Section of Clinical Biochemistry, University of Verona, Verona, Italy
| | | | - Emmanuel J Favaloro
- Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), Pathology West, NSW Health Pathology, Westmead Hospital, Westmead, NSW, Australia
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12
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Lohrmann GM, Atwal D, Augoustides JG, Askar W, Patel PA, Ghadimi K, Makar G, Gutsche JT, Shamoun FE, Ramakrishna H. Reversal Agents for the New Generation of Oral Anticoagulants: Implications for the Perioperative Physician. J Cardiothorac Vasc Anesth 2016; 30:823-30. [PMID: 27080265 DOI: 10.1053/j.jvca.2016.01.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Indexed: 11/11/2022]
Affiliation(s)
| | - Danish Atwal
- Division of Cardiovascular Diseases, Mayo Clinic, Scottsdale, AZ
| | - John G Augoustides
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.
| | - Wajih Askar
- Department of Anesthesiology, Mayo Clinic, Scottsdale, AZ
| | - Prakash A Patel
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Kamrouz Ghadimi
- Divisions of Cardiothoracic Anesthesiology and Critical Care, Duke University Medical Center, Durham, NC
| | - Gerges Makar
- Division of Cardiovascular Diseases, Mayo Clinic, Scottsdale, AZ
| | - Jacob T Gutsche
- Department of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Fadi E Shamoun
- Division of Cardiovascular Diseases, Mayo Clinic, Scottsdale, AZ
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