We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

Third Dose of Moderna COVID-19 Vaccine in Transplant Recipients

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT04885907
Recruitment Status : Completed
First Posted : May 13, 2021
Last Update Posted : August 2, 2022
Information provided by (Responsible Party):
Deepali Kumar, University Health Network, Toronto

Brief Summary:
This study will be a randomized, double-blind, placebo-controlled trial of a third dose of Moderna vaccine versus placebo. Participants will be those that have received two doses of mRNA-1273 COVID vaccine (Moderna) at 0 and 1 months. Participants will be randomized 1:1 to receive either a third dose of the mRNA-1273 vaccine or saline placebo at 3 months post initial vaccination.

Condition or disease Intervention/treatment Phase
Vaccine Response Impaired Immune Suppression Covid19 Biological: mRNA-1273 vaccine Other: Normal Saline Placebo Phase 4

Detailed Description:
Solid organ transplant (SOT) recipients are at high risk of COVID-19 complications. The Moderna vaccine (mRNA-1273) has proven highly efficacious and safe in a phase III large, randomized controlled trial of 30,420 persons in the general population, and has been in use in Canada since December 2020. SOT patients show diminished response to mRNA vaccines in several studies with approximately 40-50% positive antibody after the second dose. In positive patients, antibody titers are lower than the general population and adverse events mirror the general population. The current study will recruit 120 SOT recipients who have received both scheduled doses of the Moderna vaccine at 0 and 1 months. The hypothesis is that a third dose of vaccine will significantly increase antibody titers. SOT participants will be recruited and randomized 1:1 to receive an additional dose of Moderna COVID-19 vaccine two months after the last dose vs saline placebo. The outcomes will measure anti-RBD antibody titer, T-cell immunity, local/systemic side effects, and rejection events.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 120 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: Randomised, placebo-controlled trial
Masking: Double (Participant, Care Provider)
Masking Description: Participant and vaccinator will be blinded to vaccine vs placebo
Primary Purpose: Prevention
Official Title: A Randomised, Blinded, Controlled Trial of a Third Dose of Moderna COVID-19 Vaccine Versus Placebo in Solid Organ Transplant Recipients
Actual Study Start Date : May 25, 2021
Actual Primary Completion Date : July 30, 2021
Actual Study Completion Date : August 30, 2021

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Active Comparator: Experimental group
Participants will receive a one dose of mRNA-1273 vaccine 0.5mL i.m. in deltoid muscle
Biological: mRNA-1273 vaccine
COVID vaccine 3rd dose
Other Name: Moderna COVID-19 vaccine

Placebo Comparator: Comparator Group
Participants will receive one dose of normal saline injection 0.5mL i.m. in deltoid muscle
Other: Normal Saline Placebo
Normal Saline Placebo

Primary Outcome Measures :
  1. anti-RBD antibody titer [ Time Frame: 4-6 weeks after intervention ]
    Percentage of patients that achieve anti-RBD of >=100 U/mL in each arm

Secondary Outcome Measures :
  1. Adverse events [ Time Frame: 7 days after intervention ]
    Percentage of patient with local and systemic adverse events

  2. T-cell response [ Time Frame: 4-6 weeks after intervention ]
    Proportion of participants with an increase in polyfunctional T-cell response compared to pre-vaccination

Other Outcome Measures:
  1. SARS-CoV-2 infection [ Time Frame: 6 months after intervention ]
    Number of patients with microbiologically proven infection

  2. Rejection [ Time Frame: 4 weeks after intervention ]
    Proportion of patients with biopsy-proven or clinically treated graft rejection

Information from the National Library of Medicine

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.

Layout table for eligibility information
Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Solid organ transplant recipient who has previously received Moderna vaccine at 0 and 1 months
  • Able to provide informed consent

Exclusion Criteria:

  • Anaphylaxis or allergic reaction to Moderna vaccine

Information from the National Library of Medicine

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): NCT04885907

Layout table for location information
Canada, Ontario
University Health Network, Toronto General Hospital
Toronto, Ontario, Canada, M5G 2N2
University Health Network, Toronto General Hospital, Multi-Organ Transplant
Toronto, Ontario, Canada, M5G2N2
Sponsors and Collaborators
University Health Network, Toronto
Layout table for investigator information
Principal Investigator: Deepali Kumar, MD University Health Network, Toronto
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Layout table for additonal information
Responsible Party: Deepali Kumar, Clinician-Investigator, University Health Network, Toronto
ClinicalTrials.gov Identifier: NCT04885907    
Other Study ID Numbers: 21-5324.0
First Posted: May 13, 2021    Key Record Dates
Last Update Posted: August 2, 2022
Last Verified: July 2022
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Layout table for additional information
Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Product Manufactured in and Exported from the U.S.: Yes
Keywords provided by Deepali Kumar, University Health Network, Toronto:
solid organ transplant
Additional relevant MeSH terms:
Layout table for MeSH terms
Respiratory Tract Infections
Pneumonia, Viral
Virus Diseases
Coronavirus Infections
Coronaviridae Infections
Nidovirales Infections
RNA Virus Infections
Lung Diseases
Respiratory Tract Diseases
Immunologic Factors
Physiological Effects of Drugs