Study on Sequential Immunization of Inactivated COVID-19 Vaccine and Recombinant COVID-19 Vaccine (Ad5 Vector) in Elderly Adults

August 12, 2022 updated by: Jiangsu Province Centers for Disease Control and Prevention

Safety and Immunogenicity of Sequential Immunization of Inactivated COVID-19 Vaccine and Recombinant COVID-19 Vaccine (Ad5 Vector) inChinese Healthy Adults Aged 60 and Above: a Randomized, Observer-blind,Parallel-controlled Clinical Trial

This is a randomized, observer-blind, parallel-controlled study, for evaluation of safety and immunogenicity of sequential immunization of a recombinant COVID-19 vaccine (adenovirus type 5 vector) in Chinese healthy adults aged 60 and above after the priming vaccination of inactivated vaccine. 300 healthy subjects aged 60 and above will be recruited in this study. Of them, 200 subjects who have been vaccinated with two dose of inactive SARS-CoV-2 vaccine will be recruited and randomized at a 1:1 ratio to receive a booster dose of inactivated SARS-CoV-2 vaccine or recombinant SARS-CoV-2 Ad5 vectored vaccine at 3~6 months later. Other 100 subjects who have been vaccinated with one dose of inactivated SARS-CoV-2 vaccine will be recruited and randomized at a 1:1 ratio to receive a booster dose of inactivated SARS-CoV-2 vaccine or recombinant SARS-CoV-2 Ad5 vectored vaccine at 1~3 months later. The occurrence of adverse events within 28 days and serious adverse events within 6 months after vaccination will be observed. In addition, blood samples will be collected on day 0 before the boosting with ad5 vectored vaccine and on day 14, 28 and month 6 after the boosting. Serum antibody levels, cellular immune responses and the subgroups or germlines of the specific B cells will be analyzed. Each subject will remain in this study for approximately 6 months.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
300

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Jiangsu
      • Nanjing, Jiangsu, China
        • Jiangsu Provincial Center for Diseases Control and Prevention

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

60 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Health subjects aged 60 and above, who have been completed two-dose regimen of inactive SARS-CoV-2 vaccine in the past 3-6 months, or received one dose of inactive SARS-CoV-2 vaccine in the past 1-3 months.
  • The subject can provide with informed consent and sign informed consent form (ICF).
  • The subjects are able to and willing to comply with the requirements of the clinical trial program and could complete the 6-month follow-up of the study.
  • Axillary temperature ≤ 37.0#.
  • Individuals who are in good health condition at the time of entry into the trial as determined by medical history, physical examination and clinical judgment of the investigator and meet the requirements of immunization

Exclusion Criteria:

  • have the medical history or family history of convulsion, epilepsy,encephalopathy and psychosis.
  • be allergic to any component of the research vaccines, or used to have a history of hypersensitivity or serious reactions to vaccination.
  • women with positive urine pregnancy test, pregnant or breast-feeding, or have a pregnancy plan within six months.
  • have acute febrile diseases and infectious diseases.
  • have severe chronic diseases or condition in progress cannot be controlled.
  • congenital or acquired angioedema / neuroedema
  • have the history of urticaria 1 year before receiving the investigational vaccine.
  • have asplenia or functional asplenia.
  • have thrombocytopenia or other coagulation disorders (which may cause contraindications for intramuscular injection).
  • have needle sickness.
  • have the history of immunosuppressive therapy, anti-allergy therapy,cytotoxic therapy or inhaled corticosteroids (excluding corticosteroidspray therapy for allergic rhinitis, and acute corticosteroid therapy without dermatitis) over the past 6 months.
  • have received blood products within 4 months before injection of investigational vaccines.
  • under anti-tuberculosis treatment.
  • not be able to follow the protocol, or not be able to understand the informed consent according to the researcher's judgment, due to variousmedical, psychological, social or other conditions.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: heterologous boost arm with Ad5 vectored vaccine
Subjects who have been primed with two doses of inactive SARS-CoV-2 vaccine will receive a booster of recombinant SARS-CoV-2 Ad5 vectored vaccine after 3~6 months.
Biological: Recombinant SARS-CoV-2 Ad5 vectored vaccine
This vaccine contains 5×10^10 virus particles of recombinant replication defective human type 5 adenovirus expressing SARS-CoV-2 S protein, which is produced by CanSino Biologics Inc. It is a liquid dosage form, 0.5 ml / bottle.
Other Names:
  • Ad5-nCoV
Active Comparator: homogeneous boost arm with inactive vaccine
Subjects who have been primed with two doses of inactive SARS-CoV-2 vaccine will receive a booster dose of inactive SARS-CoV-2 vaccine after 3~6 months.
Biological: Inactive SARS-CoV-2 vaccine (Vero cell)
This vaccine contains 600 SU of SARS-CoV-2 antigen, which is produced by Sinovac Research & Development Co., Ltd. 0.5 ml / bottle.
Other Names:
  • CoronaVac
Experimental: heterologous regimen with Ad5 vectored vaccine
Subjects who have been primed with one dose of inactive SARS-CoV-2 vaccine will receive one dose of recombinant SARS-CoV-2 Ad5 vectored vaccine after 1~3 months
Biological: Recombinant SARS-CoV-2 Ad5 vectored vaccine
This vaccine contains 5×10^10 virus particles of recombinant replication defective human type 5 adenovirus expressing SARS-CoV-2 S protein, which is produced by CanSino Biologics Inc. It is a liquid dosage form, 0.5 ml / bottle.
Other Names:
  • Ad5-nCoV
Active Comparator: homogeneous regimen arm with inactive vaccine
Subjects who have been primed with one dose of inactive SARS-CoV-2 vaccine will receive one dose of inactive SARS-CoV-2 vaccine after 1~3 months.
Biological: Inactive SARS-CoV-2 vaccine (Vero cell)
This vaccine contains 600 SU of SARS-CoV-2 antigen, which is produced by Sinovac Research & Development Co., Ltd. 0.5 ml / bottle.
Other Names:
  • CoronaVac

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Incidence of adverse reactions within 28 days after the booster dose.
Time Frame: Within 28 days after the booster dose
Incidence of adverse reactions within 28 days after vaccination.
Within 28 days after the booster dose
GMT of neutralizing antibodies against live SARS-CoV-2 virus on day 14 after the booster dose.
Time Frame: On day 14 after the booster dose
GMT of neutralizing antibodies against live SARS-CoV-2 virus on day 14 after the vaccination.
On day 14 after the booster dose

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Incidence of solicited AE within 14 days after the booster dose
Time Frame: within 14 days after the booster dose
Incidence of solicited adverse events (AE) within 14 days after the booster vaccination.
within 14 days after the booster dose
Incidence of unsolicited AE within 28 days after the booster dose.
Time Frame: within 28 days after the booster dose
Incidence of unsolicited adverse events (AE) within 28 days after vaccination.
within 28 days after the booster dose
Incidence of serious adverse events (SAE) till the 6 months after the booster dose.
Time Frame: within 6 months after the booster dose
Incidence of serious adverse events (SAE) till the 6 months after booster vaccination.
within 6 months after the booster dose
GMT of binding antibodies against SARS-CoV-2 S and N protein on day 14, day 28 and month 6 after the booster dose.
Time Frame: on day 14, day 28 and month 6 after the booster vaccination
GMT of binding antibodies against SARS-CoV-2 S and N protein measured by ELISA on day 14, day 28 and month 6after the booster vaccination.
on day 14, day 28 and month 6 after the booster vaccination
GMT of neutralizing antibodies against live SARS-CoV-2 virus on day 28 and month 6 after the booster dose.
Time Frame: on day 28 and month 6 after the last dose of vaccination
GMT of neutralizing antibodies against live SARS-CoV-2 virus on day 28 and month 6 after the booster dose.
on day 28 and month 6 after the last dose of vaccination
Fold increase of binding antibodies against SARS-CoV-2 S and N protein on day 14, day 28 and month 6 after the booster vaccination.
Time Frame: on day 14, day 28 and month 6 after the booster vaccination
Fold increase of binding antibodies against SARS-CoV-2 S and N protein measured by ELISA, as compared to baseline, on day 14, day 28 and month 6 after the booster vaccination.
on day 14, day 28 and month 6 after the booster vaccination
Fold increase of neutralizing antibodies against live SARS-CoV-2 virus on day 14, day 28 and month 6 after the booster vaccination.
Time Frame: on day 14, day 28 and month 6 after the last dose of vaccination
Fold increase of neutralizing antibodies against live SARS-CoV-2 virus, as compared to baseline, on day 14, day 28 and month 6 after the booster vaccination.
on day 14, day 28 and month 6 after the last dose of vaccination
Proportion of the participants with at least a four-fold increase of the binding antibodies against SARS-CoV-2 S and N protein on day 14, day 28 and month 6 after the booster vaccination.
Time Frame: on day 14, day 28 and month 6 after the booster vaccination
Proportion of the participants with at least a four-fold increase of the binding antibodies against SARS-CoV-2 S and N protein on day 14, day 28 and month 6 after the booster vaccination.
on day 14, day 28 and month 6 after the booster vaccination
Proportion of the participants with at least a four-fold increase of neutralizing antibodies against live SARS-CoV-2virus on day 14, day 28 and month 6 after the booster vaccination.
Time Frame: on day 14, day 28 and month 6 after the booster vaccination
Proportion of the participants with at least a four-fold increase of neutralizing antibodies against live SARS-CoV-2virus, as compared to baseline, at Day 14, Day 28 and Month 6 after the booster vaccination.
on day 14, day 28 and month 6 after the booster vaccination
Specific T cell responses on day 14 after the booster vaccination.
Time Frame: on day 14 after the booster vaccination
Specific T cell responses on day 14 after the booster vaccination detected by ELISPOT.
on day 14 after the booster vaccination

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Types of IgG binding to SARS-CoV-2 S protein on day 14, day 28 and month 6 after the booster vaccination.
Time Frame: on day 14, day 28 and month 6 after the booster vaccination
Types of IgG binding to SARS-CoV-2 S protein on day 14, day 28 and month 6 after the booster vaccination.
on day 14, day 28 and month 6 after the booster vaccination
GMT of neutralizing antibodies against P.1 variants on day 28 after the booster vaccination.
Time Frame: on day 28 after the booster vaccination
GMT of neutralizing antibodies against P.1 variants on day 28 after the booster vaccination.
on day 28 after the booster vaccination
GMT of neutralizing antibodies against 501Y.V2 variants on day 28 after the booster vaccination.
Time Frame: on day 28 after the booster vaccination
GMT of neutralizing antibodies against 501Y.V2 variants on day 28 after the booster vaccination.
on day 28 after the booster vaccination

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Jiangsu Province Centers for Disease Control and Prevention

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
CanSino Biologics Inc.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 26, 2021

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 26, 2021

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 15, 2022

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 3, 2021

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 3, 2021

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 7, 2021

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
August 16, 2022

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 12, 2022

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2022

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • JSVCT117

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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