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A Clinical Trial of COVAC-1, a COVID-19 Vaccine, in Generally Healthy Adults

Primary Purpose

Severe Acute Respiratory Syndrome Coronavirus 2

Status
Withdrawn
Phase
Phase 1
Locations
Study Type
Interventional
Intervention
COVAC-1
Saline Placebo
Sponsored by
University of Saskatchewan
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional prevention trial for Severe Acute Respiratory Syndrome Coronavirus 2

Eligibility Criteria

18 Years - undefined (Adult, Older Adult)All SexesAccepts Healthy Volunteers

Inclusion Criteria:

  1. Generally healthy male and female adults aged 18 years of age or older at the time of signing the informed consent form (i.e., 18 to 54 for Arm 1a and ≥55 for Arm 1b);
  2. Good general health as determined by screening evaluation no greater than 30 days before injection of first dose; Note: Participants who are overtly healthy as determined by medical evaluation or are considered medically stable according to the judgment of the Investigator. A stable medical condition is defined as disease not requiring significant change in therapy or hospitalization for worsening disease during the 3 months prior to enrolment, and/or hospitalization within the entire study period is not anticipated. Also, the participant appears likely to be able to remain in follow-up through the end of protocol-specified period. Mild to moderate well-controlled comorbidities are allowed.
  3. If female of child-bearing potential and heterosexually active, practice of adequate contraception for 30 days prior to injection, negative pregnancy test on the day of injection, and agreement to continue adequate contraception until 180 days after the second injection and;
  4. Written informed consent, after review of the consent form and having adequate opportunity to discuss the study with an Investigator or a qualified designee.

Exclusion Criteria:

  1. Presence of any febrile illness or any known or suspected acute illness on the day of any immunization;
  2. Any immunodeficiency (congenital or acquired) disease, disorder, or finding that may significantly increase the risk of study participant or, in the Investigator's judgment, make the participant inappropriate for the study;
  3. Clinically significant bleeding disorder (e.g., clotting factor deficiency, coagulopathy or platelet disorder), or prior history of significant bleeding or bruising following IM injections or venipuncture;
  4. Receiving systemic immunosuppressive therapy or history of receiving chemotherapy in last 5 years other than topical agents;
  5. Receipt of systemic glucocorticoids (a dose ≥ 20 mg/day prednisone or equivalent for 14 days) within 1 month, or any other cytotoxic or immunosuppressive drug within 6 months prior to injection of first dose;
  6. Cancer diagnosis in the last 5 years, excluding basal cell and squamous cell carcinoma of the skin, which are allowed;
  7. Presence of autoimmune disease;
  8. Receipt of any investigational drug within 6 months;
  9. Receipt of any non-COVID-19 authorized vaccines within 2 weeks of receiving study dose injection;
  10. Receipt of any authorized COVID-19 vaccine prior to study enrollment;
  11. Receipt of any other experimental SARS-CoV-2/COVID-19 or other experimental coronavirus vaccine(s) at any time prior to or during the study;
  12. Receipt of blood products or immunoglobulin (IVIg or IMIg) within 3 months of study entry/baseline serologic evaluation;
  13. Current anti-tuberculosis therapy;
  14. History of any reaction or hypersensitivity likely to be exacerbated by any component of the study vaccine;
  15. Hematologic or biochemical laboratory abnormalities (blood or urine), as defined by lab normal ranges. To exclude transient abnormalities, the Investigator may repeat a test once, and if the repeat test is normal according to local reference ranges, participant may be enrolled. Grade 1 abnormalities of laboratory values will not be exclusionary if considered not clinically significant by the Investigator. And;
  16. Known current or previous laboratory-confirmed SARS-CoV-1 OR SARS-CoV-2 infection, as documented by a positive polymerase chain reaction (PCR) test from a nasal swab OR known or laboratory-confirmed positive serology.

Sites / Locations

    Arms of the Study

    Arm 1

    Arm 2

    Arm 3

    Arm 4

    Arm 5

    Arm 6

    Arm 7

    Arm 8

    Arm Type

    Experimental

    Placebo Comparator

    Experimental

    Placebo Comparator

    Experimental

    Placebo Comparator

    Experimental

    Placebo Comparator

    Arm Label

    Group A (18-54 yrs)

    Group B (18-54 yrs)

    Group C (18-54 yrs)

    Group D (18-54 yrs)

    Group E (55+ yrs)

    Group F (55+ yrs)

    Group G (55+ yrs)

    Group H (55+ yrs)

    Arm Description

    COVAC-1 25 ug

    Placebo Control

    COVAC-1 50 ug

    Placebo Control

    COVAC-1 25 ug

    Placebo Control

    COVAC-1 50 ug

    Placebo Control

    Outcomes

    Primary Outcome Measures

    Occurrence of adverse events (AEs) from the first injection to Day 28, in all participants, in all groups
    The occurrence of each solicited local and general AE, during each 7-day follow-up period after injection (e.g., the day of injection and 6 subsequent days). The occurrence of any unsolicited AEs for the entire study period. The occurrence of any hematological (hemoglobin level, WBC, lymphocyte, neutrophil, eosinophil, and platelet count) and biochemical (ALT, AST, BUN, and Cr) clinically significant laboratory abnormality through to Day 28 and; The occurrence of any serious AEs (SAEs) medically attended events (MAE), or adverse event of special interest (AESI).
    Occurrence of AEs from the second injection to Day 56 (28 days post injection), in all participants, in all groups
    The occurrence of solicited local and general AE, during each 7-day follow-up period after the second injection (e.g., the day of 2nd injection and 6 subsequent days); The occurrence of any unsolicited AEs for the entire study period and; The occurrence of any hematological (hemoglobin level, WBC, lymphocyte, neutrophil, eosinophil, and platelet count) and biochemical (ALT, AST, BUN, and Cr) clinically significant laboratory abnormality through to Day 42.

    Secondary Outcome Measures

    Specific antibody response induced by the vaccine against the SARS-CoV-2 S protein as measured by ELISA or measured by Neutralization Assay
    The immune response to the study vaccine, as measured by antibody (e.g., IgG and other isotypes) directed to Wuhan spike antigen or neutralizing antibodies
    Specific cell-mediated immunity (CMI) response induced by the vaccine against the SARS-CoV-2 virus
    The immune response to the study vaccine, as measured by cell immune response markers in PBMCs

    Full Information

    First Posted
    November 30, 2021
    Last Updated
    August 5, 2022
    Sponsor
    University of Saskatchewan
    Collaborators
    Government of Canada, Government of Saskatchewan
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    1. Study Identification

    Unique Protocol Identification Number
    NCT05155982
    Brief Title
    A Clinical Trial of COVAC-1, a COVID-19 Vaccine, in Generally Healthy Adults
    Official Title
    A Randomized, Observer-Blind, Dose-Escalation, Placebo-Controlled Phase 1 Clinical Trial of COVAC-1 in Generally Healthy Adults
    Study Type
    Interventional

    2. Study Status

    Record Verification Date
    August 2022
    Overall Recruitment Status
    Withdrawn
    Why Stopped
    Decided not to move forward with the study design.
    Study Start Date
    June 2022 (Anticipated)
    Primary Completion Date
    June 2023 (Anticipated)
    Study Completion Date
    October 2023 (Anticipated)

    3. Sponsor/Collaborators

    Responsible Party, by Official Title
    Principal Investigator
    Name of the Sponsor
    University of Saskatchewan
    Collaborators
    Government of Canada, Government of Saskatchewan

    4. Oversight

    Studies a U.S. FDA-regulated Drug Product
    No
    Studies a U.S. FDA-regulated Device Product
    No
    Data Monitoring Committee
    No

    5. Study Description

    Brief Summary
    VIDO has developed a vaccine called COVAC-1. The study vaccine contains a portion of the SARS-CoV-2 spike protein, called S1. The spike protein is the part of the virus that is responsible for attaching to the surface of host cells. COVAC-1 contains an adjuvant called TriAdj. An adjuvant is a compound that is added to a vaccine to help the vaccine produce a better immune response. The TriAdj adjuvant is made up of three components (a toll-like receptor agonist polyI:C, an immunostimulatory host defense protein HDP IDR-1002 and a polyphosphazene carrier system, PCEP). The three components work together to improve the body's response to the S1 protein. The COVAC-1 vaccine is expected to stimulate the body to make antibodies against the S1 protein. The antibodies will recognize the viral spike protein if the body is exposed to the virus and prevent or reduce the severity of COVID-19 illness. In animal studies, the immune response generated by the COVAC-1 vaccine was able to protect the vaccinated animals against a severe SARS-CoV-2 infection. Phase 1 is a multi-centred, multi-national trial of the COVAC-1 vaccine to be completed in Canada and Brazil. It will be a randomized, observer-blinded, and placebo-controlled study to assess the safety and immunogenicity of two dosing levels (25 and 50 µg S1 protein) administered twice (4 weeks apart) in healthy adults 18 through 54 years of age (Arm 1a) and 55 years of age and older (Arm 1b). Enrolment and vaccination of participants will be staggered over time based on vaccine dose. Study participants aged 18 to 54 and those >55 years of age will commence in parallel at the starting dose of 25 ug and after approval by Sponsor based upon recommendations from the Data Safety Monitoring Board (DSMB), new study participants will be allowed to receive the higher dose of 50 ug. Approval will also be sought from Sponsor, based on recommendations provided by the DSMB, to proceed with the second dose in each dosing and age group. Within the same age group, the 8 participants receiving the lower dose are randomized with 4 participants receiving placebo and the 8 participants receiving the highest dose are randomized with 4 participants receiving placebo. Within each dose level of 12 participants, it is proposed to immunize a first cohort of 3 participants (including at least 2 active vaccine participants) and pending no holding rule is met after 48 hours, as determined by the 48-hour-post-dose 1 phone call, to immunize the remaining 9 participants within that dose level. Every attempt will be made to fully enroll all age groups.

    6. Conditions and Keywords

    Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
    Severe Acute Respiratory Syndrome Coronavirus 2

    7. Study Design

    Primary Purpose
    Prevention
    Study Phase
    Phase 1
    Interventional Study Model
    Sequential Assignment
    Masking
    ParticipantCare ProviderInvestigatorOutcomes Assessor
    Allocation
    Randomized
    Enrollment
    0 (Actual)

    8. Arms, Groups, and Interventions

    Arm Title
    Group A (18-54 yrs)
    Arm Type
    Experimental
    Arm Description
    COVAC-1 25 ug
    Arm Title
    Group B (18-54 yrs)
    Arm Type
    Placebo Comparator
    Arm Description
    Placebo Control
    Arm Title
    Group C (18-54 yrs)
    Arm Type
    Experimental
    Arm Description
    COVAC-1 50 ug
    Arm Title
    Group D (18-54 yrs)
    Arm Type
    Placebo Comparator
    Arm Description
    Placebo Control
    Arm Title
    Group E (55+ yrs)
    Arm Type
    Experimental
    Arm Description
    COVAC-1 25 ug
    Arm Title
    Group F (55+ yrs)
    Arm Type
    Placebo Comparator
    Arm Description
    Placebo Control
    Arm Title
    Group G (55+ yrs)
    Arm Type
    Experimental
    Arm Description
    COVAC-1 50 ug
    Arm Title
    Group H (55+ yrs)
    Arm Type
    Placebo Comparator
    Arm Description
    Placebo Control
    Intervention Type
    Biological
    Intervention Name(s)
    COVAC-1
    Intervention Description
    Intramuscular vaccine against SARS-CoV-2
    Intervention Type
    Biological
    Intervention Name(s)
    Saline Placebo
    Intervention Description
    Intramuscular injection of saline placebo
    Primary Outcome Measure Information:
    Title
    Occurrence of adverse events (AEs) from the first injection to Day 28, in all participants, in all groups
    Description
    The occurrence of each solicited local and general AE, during each 7-day follow-up period after injection (e.g., the day of injection and 6 subsequent days). The occurrence of any unsolicited AEs for the entire study period. The occurrence of any hematological (hemoglobin level, WBC, lymphocyte, neutrophil, eosinophil, and platelet count) and biochemical (ALT, AST, BUN, and Cr) clinically significant laboratory abnormality through to Day 28 and; The occurrence of any serious AEs (SAEs) medically attended events (MAE), or adverse event of special interest (AESI).
    Time Frame
    Day 0 - 28
    Title
    Occurrence of AEs from the second injection to Day 56 (28 days post injection), in all participants, in all groups
    Description
    The occurrence of solicited local and general AE, during each 7-day follow-up period after the second injection (e.g., the day of 2nd injection and 6 subsequent days); The occurrence of any unsolicited AEs for the entire study period and; The occurrence of any hematological (hemoglobin level, WBC, lymphocyte, neutrophil, eosinophil, and platelet count) and biochemical (ALT, AST, BUN, and Cr) clinically significant laboratory abnormality through to Day 42.
    Time Frame
    Day 28 - 56
    Secondary Outcome Measure Information:
    Title
    Specific antibody response induced by the vaccine against the SARS-CoV-2 S protein as measured by ELISA or measured by Neutralization Assay
    Description
    The immune response to the study vaccine, as measured by antibody (e.g., IgG and other isotypes) directed to Wuhan spike antigen or neutralizing antibodies
    Time Frame
    Days 14, 28, 35, 42, 56, 90, 120, and 365
    Title
    Specific cell-mediated immunity (CMI) response induced by the vaccine against the SARS-CoV-2 virus
    Description
    The immune response to the study vaccine, as measured by cell immune response markers in PBMCs
    Time Frame
    Days 0, 14, 28, 35, 42, 120, and 365
    Other Pre-specified Outcome Measures:
    Title
    The specific antibody response induced by the vaccine against the SARS-CoV-2 RBD protein as measured by ELISA
    Description
    The immune response to the study vaccine, as measured by antibody directed to RBD antigen
    Time Frame
    Days 0, 14, 28, 35, 42, 56, 90, 120, and 365
    Title
    Specific neutralizing response induced by the vaccine against one or more Variant(s) of Concern
    Description
    • The immune response to the study vaccine, as measured by neutralizing antibodies against Variant(s) of Concern
    Time Frame
    Days 0, 14, 28, 35, 42, 56, 90, 120, and 365

    10. Eligibility

    Sex
    All
    Minimum Age & Unit of Time
    18 Years
    Accepts Healthy Volunteers
    Accepts Healthy Volunteers
    Eligibility Criteria
    Inclusion Criteria: Generally healthy male and female adults aged 18 years of age or older at the time of signing the informed consent form (i.e., 18 to 54 for Arm 1a and ≥55 for Arm 1b); Good general health as determined by screening evaluation no greater than 30 days before injection of first dose; Note: Participants who are overtly healthy as determined by medical evaluation or are considered medically stable according to the judgment of the Investigator. A stable medical condition is defined as disease not requiring significant change in therapy or hospitalization for worsening disease during the 3 months prior to enrolment, and/or hospitalization within the entire study period is not anticipated. Also, the participant appears likely to be able to remain in follow-up through the end of protocol-specified period. Mild to moderate well-controlled comorbidities are allowed. If female of child-bearing potential and heterosexually active, practice of adequate contraception for 30 days prior to injection, negative pregnancy test on the day of injection, and agreement to continue adequate contraception until 180 days after the second injection and; Written informed consent, after review of the consent form and having adequate opportunity to discuss the study with an Investigator or a qualified designee. Exclusion Criteria: Presence of any febrile illness or any known or suspected acute illness on the day of any immunization; Any immunodeficiency (congenital or acquired) disease, disorder, or finding that may significantly increase the risk of study participant or, in the Investigator's judgment, make the participant inappropriate for the study; Clinically significant bleeding disorder (e.g., clotting factor deficiency, coagulopathy or platelet disorder), or prior history of significant bleeding or bruising following IM injections or venipuncture; Receiving systemic immunosuppressive therapy or history of receiving chemotherapy in last 5 years other than topical agents; Receipt of systemic glucocorticoids (a dose ≥ 20 mg/day prednisone or equivalent for 14 days) within 1 month, or any other cytotoxic or immunosuppressive drug within 6 months prior to injection of first dose; Cancer diagnosis in the last 5 years, excluding basal cell and squamous cell carcinoma of the skin, which are allowed; Presence of autoimmune disease; Receipt of any investigational drug within 6 months; Receipt of any non-COVID-19 authorized vaccines within 2 weeks of receiving study dose injection; Receipt of any authorized COVID-19 vaccine prior to study enrollment; Receipt of any other experimental SARS-CoV-2/COVID-19 or other experimental coronavirus vaccine(s) at any time prior to or during the study; Receipt of blood products or immunoglobulin (IVIg or IMIg) within 3 months of study entry/baseline serologic evaluation; Current anti-tuberculosis therapy; History of any reaction or hypersensitivity likely to be exacerbated by any component of the study vaccine; Hematologic or biochemical laboratory abnormalities (blood or urine), as defined by lab normal ranges. To exclude transient abnormalities, the Investigator may repeat a test once, and if the repeat test is normal according to local reference ranges, participant may be enrolled. Grade 1 abnormalities of laboratory values will not be exclusionary if considered not clinically significant by the Investigator. And; Known current or previous laboratory-confirmed SARS-CoV-1 OR SARS-CoV-2 infection, as documented by a positive polymerase chain reaction (PCR) test from a nasal swab OR known or laboratory-confirmed positive serology.
    Overall Study Officials:
    First Name & Middle Initial & Last Name & Degree
    Volker Gerdts, DVM
    Organizational Affiliation
    University of Saskatchewan
    Official's Role
    Study Director

    12. IPD Sharing Statement

    Plan to Share IPD
    No

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    A Clinical Trial of COVAC-1, a COVID-19 Vaccine, in Generally Healthy Adults

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