Safety and Efficacy of AT-527 in Subjects With Moderate Coronavirus Disease (COVID-19) in a Hospital Setting

NCT ID: NCT04396106

Last Updated: 2023-03-09

Study Results

Results available

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Basic Information

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Recruitment Status

TERMINATED

Clinical Phase

PHASE2

Total Enrollment

83 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-05-26

Study Completion Date

2022-02-28

Brief Summary

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The objectives of this study are to evaluate the safety, tolerability, antiviral activity and efficacy of AT-527 in adult subjects ≥18 years of age with moderate COVID-19 and risk factors for poor outcomes (such as obesity (BMI\>30), hypertension, diabetes or asthma). Eligible subjects will be randomized to blinded AT-527 (nucleotide analog) tablets or matching placebo tablets to be administered orally for 5 days. Part A will evaluate an AT-527 dose of 550 mg BID and Part B will evaluate a second dose of AT-527 (1100 mg BID). Local supportive standard of care (SOC) will be allowed for all subjects. Efficacy, antiviral activity and safety observations will be compared for treatment with active AT-527 tablets vs. placebo tablets.

Detailed Description

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Conditions

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COVID-19

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

TRIPLE

Participants Caregivers Investigators
Blinded

Study Groups

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AT-527 - 550 mg BID

Part A

Group Type ACTIVE_COMPARATOR

AT-527

Intervention Type DRUG

One 550 mg tablet of AT-527 administered every \~12 hours (twice a day) for a total of 5 days

Placebo for 550 mg BID

Part A

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type OTHER

One placebo tablet administered every \~12 hours (twice a day) for a total of 5 days

AT-527 - 1100 mg BID

Part B

Group Type ACTIVE_COMPARATOR

AT-527

Intervention Type DRUG

Two 550 mg tablets of AT-527 administered every \~12 hours (twice a day) for a total of 5 days

Placebo for 1100 mg BID

Part B

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type OTHER

Two placebo tablets administered every \~12 hours (twice a day) for a total of 5 days

Interventions

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AT-527

One 550 mg tablet of AT-527 administered every \~12 hours (twice a day) for a total of 5 days

Intervention Type DRUG

Placebo

One placebo tablet administered every \~12 hours (twice a day) for a total of 5 days

Intervention Type OTHER

AT-527

Two 550 mg tablets of AT-527 administered every \~12 hours (twice a day) for a total of 5 days

Intervention Type DRUG

Placebo

Two placebo tablets administered every \~12 hours (twice a day) for a total of 5 days

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Hospitalized or in a hospital-affiliated confinement facility
* SARS-CoV-2 positive
* Initial COVID-19 symptom onset within 5 days prior to Screening
* SpO2 ≥ 93% on room air or requires ≤ 2L/min oxygen by nasal cannula or mask to maintain SpO2 ≥ 93%
* Must also have a history of at least one of the following known risk factors for poor outcomes: obesity (BMI\>30), hypertension, diabetes or asthma.

Exclusion Criteria

* Severe or critical COVID-19 illness: RR ≥30, HR ≥125, SpO2 \<93% on room air or requires \>2L/min oxygen by nasal cannula or mask to maintain SpO2 ≥93%, systolic blood pressure \< 90 mm Hg, diastolic blood pressure \< 60 mm Hg or PaO2/FiO2 \<300
* Requires mechanical ventilation
* Lobar or segmental consolidation on chest imaging.
* Treatment with other drugs thought to possibly have activity against SARS-CoV-2
* ALT or AST \> 5 x upper limit of normal (ULN)
* Female subject is pregnant or breastfeeding
* Has received or is expected to receive any dose of a SARS-CoV-2 vaccine before the Day 14 visit (Part B).
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Atea Pharmaceuticals, Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Atea Study Site

Scottsdale, Arizona, United States

Site Status

Atea Study Site

Davis, California, United States

Site Status

Atea Study Site

Los Angeles, California, United States

Site Status

Atea Study Site

Washington D.C., District of Columbia, United States

Site Status

Atea Study Site

Orlando, Florida, United States

Site Status

Atea Study Site

Atlanta, Georgia, United States

Site Status

Atea Study Site

Chicago, Illinois, United States

Site Status

Atea Study Site

Chicago, Illinois, United States

Site Status

Atea Study Site

Boston, Massachusetts, United States

Site Status

Atea Study Site

Butte, Montana, United States

Site Status

Atea Study Site

Charlotte, North Carolina, United States

Site Status

Atea Study Site

Cincinnati, Ohio, United States

Site Status

Atea Study Site

Columbus, Ohio, United States

Site Status

Atea Study Site

Charleston, South Carolina, United States

Site Status

Atea Study Site

Columbia, South Carolina, United States

Site Status

Atea Study Site

Rosario, , Argentina

Site Status

Atea Study Site

Vicente López, , Argentina

Site Status

Atea Study Site

Brussels, , Belgium

Site Status

Atea Study Site

Mechelen, , Belgium

Site Status

Atea Study Site

Belo Horizonte, , Brazil

Site Status

Atea Study Site

Brasília, , Brazil

Site Status

Atea Study Site

Campo Largo, , Brazil

Site Status

Atea Study Site

Porto Alegre, , Brazil

Site Status

Atea Study Site

São Paulo, , Brazil

Site Status

Atea Study Site

Cairo, , Egypt

Site Status

Atea Study Site

Chisinau, , Moldova

Site Status

Atea Study Site

Bucharest, , Romania

Site Status

Atea Study Site

Bloemfontein, , South Africa

Site Status

Atea Study Site

Cape Town, , South Africa

Site Status

Atea Study Site

Centurion, , South Africa

Site Status

Atea Study Site

George, , South Africa

Site Status

Atea Study Site

Worcester, , South Africa

Site Status

Atea Study Site

Barcelona, , Spain

Site Status

Atea Study Site

Madrid, , Spain

Site Status

Atea Study Site

Pozuelo de Alarcón, , Spain

Site Status

Atea Study Site

Brovary, , Ukraine

Site Status

Atea Study Site

Kyiv, , Ukraine

Site Status

Countries

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United States Argentina Belgium Brazil Egypt Moldova Romania South Africa Spain Ukraine

References

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Horga A, Kuritzkes DR, Kowalczyk JJ, Pietropaolo K, Belanger B, Lin K, Perkins K, Hammond J. Phase II study of bemnifosbuvir in high-risk participants in a hospital setting with moderate COVID-19. Future Virol. 2023 Jun;18(8):489-500. doi: 10.2217/fvl-2023-0064. Epub 2023 Jun 23.

Reference Type DERIVED
PMID: 38051993 (View on PubMed)

Provided Documents

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Document Type: Study Protocol

View Document

Document Type: Statistical Analysis Plan

View Document

Other Identifiers

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AT-03A-001

Identifier Type: -

Identifier Source: org_study_id

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