Evidence map›Paper›PMID 34534272›Full record

Trial reportEuropean heart journal2022

Ciraparantag reverses the anticoagulant activity of apixaban and rivaroxaban in healthy elderly subjects.

Jack Ansell, Sasha Bakhru, Bryan E Laulicht, Gregory Tracey, Stephen Villano, Daniel Freedman

Open access · hybridAbstract readRandomized Controlled Trial
In one paragraph

Trial report in European heart journal, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
6.3field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 48 citations in OpenAlex.

  1. Optimal management of cardiac surgery patients using direct oral anticoagulants: recommendations for clinical practice.European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery · 2023
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  5. Brazilian Atrial Fibrillation Guidelines - 2025.Arquivos brasileiros de cardiologia · 2025
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

Jack AnsellHofstra Northwell School of Medicine, 500 Hofstra Blvd., Hempstead, NY 11549, USA.ORCID 0000-0002-1237-9797
Sasha BakhruPerosphere Technologies Inc., 108 Mill Plain Rd., Danbury, CT 06811, USA.ORCID 0000-0002-8805-9917
Bryan E LaulichtLandsdowne Laboratories Inc., 1073 N. Benson Rd., Fairfield, CT 06824, USA.
Gregory TraceyFrontage Clinical Services, Inc., 200 Meadowlands Pkwy, Secaucus, NJ 07094, USA.
Stephen VillanoAMAG Pharmaceuticals, Inc., 1100 Winter St., Waltham, MA 02450, USA.
Daniel FreedmanAMAG Pharmaceuticals, Inc., 1100 Winter St., Waltham, MA 02450, USA.
AMAG Pharmaceuticals (United States) · USHofstra University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsCiraparantag is a reversal agent for anticoagulants including direct oral anticoagulants. The aim was to evaluate the efficacy and safety of ciraparantag to reverse anticoagulation induced by apixaban or rivaroxaban in healthy elderly adults. METHODS AND

resultsTwo randomized, placebo-controlled, dose-ranging trials conducted in healthy subjects aged 50-75 years. Subjects received apixaban (Study 1) 10 mg orally twice daily for 3.5 days or rivaroxaban (Study 2) 20 mg orally once daily for 3 days. At steady-state anticoagulation subjects were randomized 3:1 to a single intravenous dose of ciraparantag (Study 1: 30, 60, or 120 mg; Study 2: 30, 60, 120, or 180 mg) or placebo. Efficacy was based on correction of the whole blood clotting time (WBCT) at multiple timepoints over 24 h. Subjects and technicians performing WBCT testing were blinded to treatment. Complete reversal of WBCT within 1 h post-dose and sustained through 5 h (apixaban) or 6 h (rivaroxaban) was dose related and observed with apixaban in 67%, 100%, 100%, and 17% of subjects receiving ciraparantag 30 mg, 60 mg, 120 mg, or placebo, respectively; and with rivaroxaban in 58%, 75%, 67%, 100%, and 13% of subjects receiving ciraparantag 30 mg, 60 mg, 120 mg, 180 mg, or placebo, respectively. Adverse events related to ciraparantag were mild, transient hot flashes or flushing.

conclusionsCiraparantag provides a dose-related reversal of anticoagulation induced by steady-state dosing of apixaban or rivaroxaban. Sustained reversal was achieved with 60 mg ciraparantag for apixaban and 180 mg ciraparantag for rivaroxaban. All doses of ciraparantag were well tolerated.

Indexed as

PyridonesRivaroxabanAdministration, OralAdultAgedAnticoagulantsArginineDabigatranHealthy VolunteersHumansMiddle AgedPiperazinesPyrazolesAnticoagulantsapixabanArginineDabigatranPER977PiperazinesPyrazolesPyridonesRivaroxabanAnticoagulantAntidoteApixabanCiraparantagRivaroxaban

Identifiers

PMID34534272
PMCPMC8900496
OpenAlexW3200033616

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.