Study To antagOnize Plasminogen Activator Inhibitor-1 in Severe COVID-19
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ClinicalTrials.gov Identifier: NCT04634799 |
Recruitment Status :
Recruiting
First Posted : November 18, 2020
Last Update Posted : January 22, 2021
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Condition or disease | Intervention/treatment | Phase |
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Covid19 | Drug: TM5614 Other: Placebo | Phase 1 Phase 2 |
This project will evaluate the efficacy and safety of a novel small molecule therapy targeting PAI-1 (TM5614) for patients with severe COVID-19. This is a randomized (1:1), double-blinded trial that will enroll adult patients (> 65 years OR <65 years with at least one major cardiometabolic comorbidity [diabetes, hypertension, or cardiovascular disease]) with COVID-19 requiring supplemental oxygen. The study intervention will be a small molecule inhibitor of PAI-1, TM5614, up to 180 mg, compared to matching placebo for up to 7 days.
Research blood samples for PAI-1 and C-reactive protein (CRP) will be collected at time of enrollment, 48 hours after 1st dose of medication and at day 7 or discharge, whichever comes first.
These objectives will allow for the planning of subsequent phase 3 study, and strengthen implementation of a multi-center randomized trial should this study confirm safety, and suggest efficacy of therapy.
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 80 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Triple (Participant, Care Provider, Investigator) |
Masking Description: | double-blind, randomized (1:1) |
Primary Purpose: | Treatment |
Official Title: | Study To antagOnize Plasminogen Activator Inhibitor-1 in Severe COVID-19 (STOP Severe COVID-19) |
Actual Study Start Date : | January 8, 2021 |
Estimated Primary Completion Date : | November 30, 2021 |
Estimated Study Completion Date : | June 30, 2022 |
Arm | Intervention/treatment |
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Active Comparator: TM5614
TM5614 30 mg tablets. 6 tablets (180 mg) taken by mouth, once daily for up to 7 days
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Drug: TM5614
TM5614 is provided in 30 mg tablets and 6 tablets (180 mg) will be taken in the evening for up to 7 days.
Other Name: Plasminogen activator inhibitor-1 (PAI-1) |
Placebo Comparator: Placebo
Placebo tablets. 6 tablets taken by mouth, once daily for up to 7 days
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Other: Placebo
Matching placebo will be provided and participants will take 6 tablets in the evening for up to 7 days.
Other Name: TM5614 Placebo |
- Clinical improvement [ Time Frame: 7 Days ]
Change of at least 2 points in the NIAID-defined ordinal scale (higher scores indicate improved outcome),:
- Death
- Hospitalized, receiving invasive mechanical ventilation or ECMO
- Hospitalized, receiving noninvasive ventilation or high-flow oxygen devices
- Hospitalized, requiring low-flow supplemental oxygen
- Hospitalized, not requiring supplemental oxygen but receiving ongoing medical care (related or not related to Covid-19)
- Hospitalized, requiring neither supplemental oxygen nor ongoing medical care (other than that specified in the protocol)
- Not hospitalized
- Sequential organ failure assessment (SOFA) score change [ Time Frame: 7 Days ]
Change in degree of organ dysfunction as defined by the Sequential Organ Failure Assessment (SOFA) Score.
The SOFA score ranges from 0 to 24 (higher scores indicate more severe organ failure), with 0 to 4 points assigned for each of 6 organ dysfunctions (ie, central nervous system, cardiovascular, respiratory, renal, coagulation, and liver).
- PAI-1 Levels [ Time Frame: 48 hours ]Change in circulating levels
- Ventilator free days [ Time Frame: 14 days ]For subjects who received mechanical ventilation, total number of days the subject was not on mechanical or non invasive mechanical ventilation while in the hospital

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Adults ≥65 years old or < 65 years old AND at least one major cardiometabolic comorbidity (diabetes, hypertension, or cardiovascular disease)
- Established diagnosis of COVID-19 as evidenced by a positive nasopharyngeal or bronchoalveolar lavage viral PCR for SARS-CoV2
- Requiring supplemental oxygen
Exclusion Criteria:
- Age <18 years old
- Pregnancy or breast-feeding
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Known contraindication to tissue plasminogen activator (tPA), including
- Active internal bleeding
- History of cerebrovascular accident
- Recent intracranial or intraspinal surgery or trauma
- Intracranial neoplasm, arteriovenous malformation or aneurysm
- Known bleeding diathesis
- Severe uncontrolled hypertension (SBP>200 persistently >12 hours)
- Currently receiving therapeutic dose anticoagulation (specifically will exclude those with potential drug-drug interaction such as heparin, apixaban, warfarin)
- Platelets <50,000
- Hematocrit <30%
- Not hemodynamically stable in the preceding 4 hours (symptomatic hypotension or systolic BP <95 mmHg at 2 out of 3 measurements)
- Concomitant illness, physical impairment or mental condition which in the opinion of the study team / primary care physician could interfere with the conduct of the study including outcome assessment
- Other patient characteristics (not thought to be related to COVID-19) that portend a very poor prognosis (e.g., severe liver failure, metastatic malignancy)
- Participation in a concurrent interventional medical investigation or pharmacologic clinical trial. Patients in observational, natural history or epidemiological studies not involving an intervention are eligible.
- Participant's responsible attending physician believes it is not appropriate for participant to participate in the study.
- Inability or unwillingness to provide written informed consent
- Involvement in the planning and/or conduct of the study
- Previous randomization in the present study
- Unable to complete study procedures.
- Patients with active venothromboembolic disease
- Patients who are receiving other investigational agents for COVID-19.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04634799
Contact: Sanjiv J Shah, MD | 312 695 0993 | sanjiv.shah@northwestern.edu | |
Contact: Douglas E Vaughan, MD | 312-926-9436 | d-vaughan@northwestern.edu |
United States, Illinois | |
Northwestern University | Recruiting |
Chicago, Illinois, United States, 60611 | |
Contact: Lyndsay Christensen, MSN 312-694-0661 lyndsay.christensen@nm.org | |
Contact: Anna Huskin, RN 312.695.4067 anna.huskin@nm.org |
Principal Investigator: | Sanjiv Shah, MD | Northwestern University |
Responsible Party: | Sanjiv Shah, Director of Research, Bluhm Cardiovascular Institute, Northwestern University |
ClinicalTrials.gov Identifier: | NCT04634799 |
Other Study ID Numbers: |
STU00213262 |
First Posted: | November 18, 2020 Key Record Dates |
Last Update Posted: | January 22, 2021 |
Last Verified: | January 2021 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Undecided |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
PAI-1 TM5614 Plasminogen Activator Inhibitor |
Plasminogen Plasminogen Activator Inhibitor 1 Plasminogen Inactivators Fibrinolytic Agents Fibrin Modulating Agents |
Molecular Mechanisms of Pharmacological Action Serine Proteinase Inhibitors Protease Inhibitors Enzyme Inhibitors |