A Phase 2/3 interventional study of rNAPc2 and Heparin in Covid19, sponsored by ARCA Biopharma, Inc.. Completed at 24 sites in 3 countries. Open to participants aged 18 Years to 90 Years. Per ClinicalTrials.gov, last updated 2023-02-21.
Sponsored by ARCA Biopharma, Inc. · Phase 2/3, Interventional, and Treatment
Sequential randomized, multicenter, active comparator study to evaluate the hypothesis that rNAPc2 (AB201), a novel, potent and highly selective tissue factor inhibitor with anticoagulant, anti-inflammatory and potential antiviral properties, shortens time to recovery compared to heparin in hospitalized patients with COVID-19 and elevated D-dimer levels.
Sequential randomized, multicenter, active comparator study to evaluate the hypothesis that rNAPc2, a novel, potent and highly selective tissue factor inhibitor with anticoagulant, anti-inflammatory and potential antiviral properties, shortens time to recovery compared to heparin in hospitalized patients with COVID-19 and elevated D-dimer levels. Study participants and Clinical Endpoint Committee (CEC) members assessing the clinical endpoints will be blinded to treatment assignment. The protocol comprises sequential Phase 2b and Phase 3 studies. Analysis of Phase 2b data could lead to study discontinuation, adjustment of eligibility criteria or sample size, and will inform the rNAPc2 dose level to be studied in Phase 3.
7,640 studies on the registry are indexed under COVID-19; 488 are open to participants now.
This study's enrollment of 160 is above the median of 100 across 4,099 interventional studies indexed under COVID-19.
Browse COVID-19 studies →ARCA Biopharma, Inc. is the lead sponsor of 10 studies on the registry; none are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
loading dose of 7.5 μg/kg SC on Day 1 followed by 5 μg/kg SC on Days 3 and 5
Drug: rNAPc2
loading dose of 5 ug/kg SC on Day 1 followed by 3 ug/kg SC on Days 3 and 5
Drug: rNAPc2
heparin at either prophylactic or therapeutic doses per Standard of Care at Institution
Drug: Heparin
two dose levels of rNAPc2
Also known as: AB201, Recombinant Nematode Anticoagulant Protein c2
standard of care heparin per institution (therapeutic or prophylactic regimen)
Proportional Change in D-dimer Level From Baseline to Day 8, or Day of Discharge if Prior to Day 8 (Phase 2b)
Proportional change is represented as percent change, and is defined as: 100 × (D-Dimer level at Day 8 or early discharge - D-Dimer level at baseline) / D-Dimer level at baseline. Baseline and post-baseline D-Dimer results are tested in the same laboratory, i.e. both from central laboratory, or local laboratory paired samples if the central laboratory values are not available.
Time frame: 8 days
Proportional Change in D-dimer Level From Baseline to 24 Hours Post-dose (Day 2) and Day 3 (Phase 2b)
Proportional change is represented as percent change, and is defined as: 100 × (D-Dimer level at Day 2/3 or early discharge - D-Dimer level at baseline)/D-Dimer level at baseline. Baseline and post-baseline D-Dimer results are tested in the same laboratory.
Time frame: 2 days and 3 days
Number of Major or Non-major Clinically Relevant Bleeding Events Within Eight (8) Days of Randomization as Compared to Heparin (Phase 2b)
Clinical events as reported by site. ISTH= International Society on Thrombosis and Haemostasis, TIMI= Thrombolysis in Myocardial Infarction. Heparin Dosing Strategy as indicated by Investigator. Where subjects have more than one bleeding event recorded, only the highest level of severity was summarized.
Time frame: 8 days
Number of Major or Non-major Clinically Relevant Bleeding Events With rNAPc2 vs. Heparin Through Day 30 (Phase 2b)
Clinical events as reported by site. ISTH= International Society on Thrombosis and Haemostasis, TIMI= Thrombolysis in Myocardial Infarction. Heparin Dosing Strategy as indicated by Investigator. Where subjects have more than one bleeding event recorded, only the highest level of severity was summarized.
Time frame: 30 days
Change in High Sensitivity C-reactive Protein Laboratory Values From Baseline Through Day 8 (Phase 2b)
Central lab samples collected per protocol. Proportional change is represented as percent change, and is defined as: 100 × (Biomarker level at Day 8 or early discharge - Biomarker level at baseline)/Biomarker level at baseline.
Time frame: 8 days
Change in Interleukin-6 Laboratory Values From Baseline Through Day 8 (Phase 2b)
Central lab samples collected per protocol. Proportional change is represented as percent change, and is defined as: 100 × (Biomarker level at Day 8 or early discharge - Biomarker level at baseline)/Biomarker level at baseline.
Time frame: 8 days
Change in Tissue Factor Laboratory Values From Baseline Through Day 8 (Phase 2b)
Central lab samples collected per protocol. Proportional change is represented as percent change, and is defined as: 100 × (Biomarker level at Day 8 or early discharge - Biomarker level at baseline)/Biomarker level at baseline.
Time frame: 8 days
Change in Antiphospholipid Antibodies Laboratory Values From Baseline Through Day 8 (Anti-Beta 2 Glycoprotein IgG) (Phase 2b)
Proportional change is represented as percent change, and is defined as: 100 × (Biomarker level at Day 8 or early discharge - Biomarker level at baseline)/Biomarker level at baseline.
Time frame: 8 days
Eligible participants were men and women (18 to 90 years) with a confirmed COVID-19 diagnosis requiring inpatient medical care and an elevated D-dimer level at screening. Enrollment began DEC2020 with the last assessment in MAR2022. 160 participants were enrolled at 15 clinical sites in Argentina, Brazil, and the United States. Originally designed as a sequential Phase 2B/3, the Ph2B top line results dictated substantial design changes for progression to Ph3 and the study was concluded at Ph2.
| Milestone | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| Started | 40 | 40 | 80 |
| Completed | 38 | 34 | 75 |
| Not completed | 2 | 6 | 5 |
| Withdrew: Physician decision | 1 | 3 | 4 |
| Withdrew: Withdrawal by subject | 1 | 3 | 1 |
Proportional change is represented as percent change, and is defined as: 100 × (D-Dimer level at Day 8 or early discharge - D-Dimer level at baseline) / D-Dimer level at baseline. Baseline and post-baseline D-Dimer results are tested in the same laboratory, i.e. both from central laboratory, or local laboratory paired samples if the central laboratory values are not available.
| Percent change | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| Proportional Change in D-dimer Level From Baseline to Day 8, or Day of Discharge if Prior to Day 8 (Phase 2b) | 137 ± 422.3 | 41.4 ± 194.6 | 34.7 ± 133.2 |
Proportional change is represented as percent change, and is defined as: 100 × (D-Dimer level at Day 2/3 or early discharge - D-Dimer level at baseline)/D-Dimer level at baseline. Baseline and post-baseline D-Dimer results are tested in the same laboratory.
| percentage change | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| Day 2 (24h post D1 dose) | 23.9 ± 213.9 | -0.1 ± 40.3 | 43.5 ± 317.5 |
| Day 3 (48h post D1 dose) | 65.8 ± 264.5 | -2.3 ± 68.5 | 21.5 ± 147.3 |
Clinical events as reported by site. ISTH= International Society on Thrombosis and Haemostasis, TIMI= Thrombolysis in Myocardial Infarction. Heparin Dosing Strategy as indicated by Investigator. Where subjects have more than one bleeding event recorded, only the highest level of severity was summarized.
| Participants | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| ISTH Major or Non-Major Clinically Relevant | 0 | 0 | 1 |
| Subjects with any ISTH if Major | 1 | 0 | 1 |
| TIMI Major | 0 | 0 | 1 |
| TIMI Minor | 0 | 0 | 0 |
| TIMI Medical attention | 0 | 0 | 0 |
| TIMI Minimal | 1 | 0 | 0 |
Clinical events as reported by site. ISTH= International Society on Thrombosis and Haemostasis, TIMI= Thrombolysis in Myocardial Infarction. Heparin Dosing Strategy as indicated by Investigator. Where subjects have more than one bleeding event recorded, only the highest level of severity was summarized.
| Participants | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| ISTH Major or Non-Major Clinically Relevant | 1 | 1 | 1 |
| ISTH Major | 0 | 1 | 1 |
| ISTH Non-major Clinically Relevant | 1 | 0 | 0 |
| ISTH Not Clinically Relevant | 2 | 1 | 0 |
| Subjects With Any ISTH if Major | 3 | 2 | 1 |
| TIMI Major | 0 | 0 | 1 |
| TIMI Minor | 0 | 1 | 0 |
| TIMI medical attention | 1 | 0 | 0 |
| TIMI Minimal | 2 | 1 | 0 |
Central lab samples collected per protocol. Proportional change is represented as percent change, and is defined as: 100 × (Biomarker level at Day 8 or early discharge - Biomarker level at baseline)/Biomarker level at baseline.
| percent change | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| Change in High Sensitivity C-reactive Protein Laboratory Values From Baseline Through Day 8 (Phase 2b) | -26.1 ± 203.9 | 270.9 ± 1556.8 | 12.8 ± 226.3 |
Central lab samples collected per protocol. Proportional change is represented as percent change, and is defined as: 100 × (Biomarker level at Day 8 or early discharge - Biomarker level at baseline)/Biomarker level at baseline.
| percentage change | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| Change in Interleukin-6 Laboratory Values From Baseline Through Day 8 (Phase 2b) | 317.4 ± 821.7 | 768.1 ± 1798.3 | 8.4 ± 113.8 |
Central lab samples collected per protocol. Proportional change is represented as percent change, and is defined as: 100 × (Biomarker level at Day 8 or early discharge - Biomarker level at baseline)/Biomarker level at baseline.
| percentage change | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| Change in Tissue Factor Laboratory Values From Baseline Through Day 8 (Phase 2b) | -21.2 ± 56.3 | -1.8 ± 89.2 | 23.3 ± 103.6 |
Proportional change is represented as percent change, and is defined as: 100 × (Biomarker level at Day 8 or early discharge - Biomarker level at baseline)/Biomarker level at baseline.
| percentage change | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| Change in Antiphospholipid Antibodies Laboratory Values From Baseline Through Day 8 (Anti-Beta 2 Glycoprotein IgG) (Phase 2b) | -24.04 ± 51.84 | -274.3 ± 1562.57 | 62.99 ± 479.75 |
Collected over All AEs were collected from the time of randomization until the participant completed Day 30 or final contact, whichever was longer. All SAEs were collected from the time of consent until the participant completed Day 30 or final contact, whichever was longer. For most participants the final visit/contact was at Day 30 (up to 40 days after screening) or later if delayed due to challenges reaching the participant or obtaining final follow-up information (up to Day 251).. Non-serious events are listed at a 5% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| rNAPc2 Lower Dose | 5/38 (13.2%) | 18/38 (47.4%) | 18/38 (47.4%) |
| rNAPc2 Higher Dose | 5/38 (13.2%) | 29/38 (76.3%) | 18/38 (47.4%) |
| Heparin | 6/80 (7.5%) | 26/80 (32.5%) | 36/80 (45%) |
| Event | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| COVID-19 pneumoniaInfections and infestations | 4/38 | 6/38 | 5/80 |
| Respiratory failureRespiratory, thoracic and mediastinal disorders | 0/38 | 5/38 | 4/80 |
| Acute kidney failureRenal and urinary disorders | 3/38 | 2/38 | 0/80 |
| Acute kidney injuryRenal and urinary disorders | 0/38 | 3/38 | 2/80 |
| Septic shockInfections and infestations | 2/38 | 0/38 | 1/80 |
| PneumothoraxRespiratory, thoracic and mediastinal disorders | 1/38 | 0/38 | 3/80 |
| Respiratory arrestRespiratory, thoracic and mediastinal disorders | 0/38 | 1/38 | 1/80 |
| Acute respiratory distress syndromeRespiratory, thoracic and mediastinal disorders | 1/38 | 0/38 | 0/80 |
| Chronic kidney diseaseRenal and urinary disorders | 1/38 | 0/38 | 0/80 |
| Urinary tract infectionInfections and infestations | 1/38 | 0/38 | 1/80 |
| Event | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin |
|---|---|---|---|
| Metabolism and nutrition disorderMetabolism and nutrition disorders | 2/38 | 8/38 | 10/80 |
| COVID-19 PneumoniaInfections and infestations | 5/38 | 4/38 | 5/80 |
| Respiratory failureRespiratory, thoracic and mediastinal disorders | 1/38 | 5/38 | 6/80 |
| Acute kidney injryRenal and urinary disorders | 3/38 | 5/38 | 2/80 |
| Cardiac disordersCardiac disorders | 1/38 | 1/38 | 7/80 |
| Gastrointestinal disordersGastrointestinal disorders | 1/38 | 3/38 | 4/80 |
| General disorders and administrative site conditionsGeneral disorders | 1/38 | 3/38 | 3/80 |
| Vascular disordersVascular disorders | 1/38 | 1/38 | 5/80 |
| Transaminases increaseInjury, poisoning and procedural complications | 2/38 | 0/38 | 0/80 |
| Blood and lymphatic system disordersBlood and lymphatic system disorders | 2/38 | 1/38 | 3/80 |
The study was designed as a sequential Phase 2B/3 trial whereby both trial phases were nested in a common protocol. When the 2B top line results dictated substantial design changes for progression to Phase 3 the study was concluded as a Phase 2 trial.
| Age, Categorical(Participants) | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin | Total |
|---|---|---|---|---|
| <=18 years | 0 | 0 | 0 | 0 |
| Between 18 and 65 years | 30 | 30 | 53 | 113 |
| >=65 years | 10 | 10 | 27 | 47 |
| Age, Continuous(years) | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin | Total |
|---|---|---|---|---|
| Mean | 53.9 ± 13.29 | 52.8 ± 12.6 | 57.6 ± 12.8 | 55.5 ± 13 |
| Sex: Female, Male(Participants) | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin | Total |
|---|---|---|---|---|
| Female | 16 | 21 | 32 | 69 |
| Male | 24 | 19 | 48 | 91 |
| Race (NIH/OMB)(Participants) | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin | Total |
|---|---|---|---|---|
| American Indian or Alaska Native | 3 | 0 | 1 | 4 |
| Asian | 0 | 0 | 0 | 0 |
| Native Hawaiian or Other Pacific Islander | 0 | 0 | 1 | 1 |
| Black or African American | 10 | 8 | 16 | 34 |
| White | 27 | 32 | 62 | 121 |
| More than one race | 0 | 0 | 0 | 0 |
| Unknown or Not Reported | 0 | 0 | 0 | 0 |
| Region of Enrollment(participants) | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin | Total |
|---|---|---|---|---|
| Argentina | 1 | 1 | 2 | 4 |
| United States | 38 | 38 | 74 | 150 |
| Brazil | 1 | 1 | 4 | 6 |
| WHO COVID Severity(Participants) | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin | Total |
|---|---|---|---|---|
| Mild | 26 | 22 | 50 | 98 |
| Severe | 14 | 18 | 30 | 62 |
| D-Dimer (ng/mL)(ng/mL) | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin | Total |
|---|---|---|---|---|
| Mean | 450.8 ± 533.8 | 517.4 ± 588.3 | 864.2 ± 1794.8 | 680.1 ± 1354 |
| D-dimer stratification (%)(Participants) | rNAPc2 Lower Dose | rNAPc2 Higher Dose | Heparin | Total |
|---|---|---|---|---|
| <= 2x Upper limit of normal | 18 | 20 | 35 | 73 |
| > 2x Upper limit of normal | 22 | 20 | 45 | 87 |
1 further baseline measures are reported on the registry.
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ARCA Biopharma, Inc.