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Study on Heterologous Prime-boost of Recombinant COVID-19 Vaccine (Ad5 Vector) and RBD-based Protein Subunit Vaccine

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ClinicalTrials.gov Identifier: NCT04833101
Recruitment Status : Active, not recruiting
First Posted : April 6, 2021
Last Update Posted : August 11, 2021
Sponsor:
Information provided by (Responsible Party):
Jiangsu Province Centers for Disease Control and Prevention

Brief Summary:
This is a randomized, observer-blind, placebo-controlled study, for evaluation of safety and immunogenicity of heterologous prime-boost immunization of recombinant COVID-19 vaccine (adenovirus type-5 vector) and RBD-based protein subunit vaccine (ZF2001) against COVID-19 in Chinese healthy population. 120 healthy subjects aged over 18 years of age who have been vaccinated with recombinant adenovirus type-5 vectored vaccine will be recruited in this study. Of them, 60 subjects will be enrolled in the "0-28 days" regimen and other 60 will be enrolled in "0-56 days" regimen. Subjects, 30 of them are 18-59 years old and 30 are 60 years old and above in each regimen will be randomly vaccinated with the second dose of subunit vaccine(ZF2001) against COVID-19 or a commercial influenza vaccine in a ratio of 2:1. They will then be vaccinated with the third dose of ZF2001 on month 4 after the second dose. The occurrence of adverse events within 28 days and serious adverse events within 6 months after the last vaccination will be observed. In addition, blood samples will be collected on day 0 before the second vaccination, day 14, 28 after the second vaccination and day 14, month 6 after third vaccination to test serum antibody levels and to profile the immune cells' subgroups and germlines. Each subject will remain in this study for approximately 12 months.

Condition or disease Intervention/treatment Phase
COVID-19 Biological: recombinant Ad5 vectored COVID-19 vaccine Biological: RBD-based protein subunit vaccine (ZF2001) against COVID-19 Biological: trivalent split influenza vaccine Phase 4

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 120 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: Safety and Immunogenicity of a Heterologous Immunization of Recombinant COVID-19 Vaccine (Ad5 Vector) and RBD-based Protein Subunit Vaccine Against COVID-19 in Chinese Healthy Population
Actual Study Start Date : April 7, 2021
Actual Primary Completion Date : June 15, 2021
Estimated Study Completion Date : December 15, 2021

Arm Intervention/treatment
Experimental: "0-28 days" vaccine group
One dose of recombinant Ad5 vectored COVID-19 vaccine on day 0, the second dose of subunit vaccine (ZF2001) against COVID-19 on day 28, and a third of subunit vaccine (ZF2001) against COVID-19 on month 4.
Biological: recombinant Ad5 vectored COVID-19 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 Name: Ad5-nCoV

Biological: RBD-based protein subunit vaccine (ZF2001) against COVID-19
This is a recombinant tandem-repeat dimeric RBD-based protein subunit vaccine (ZF2001) against COVID-19, made by using CHO cell, 25μg/dose, produced by Anhui Zhifei Longcom Biopharmaceutical Co.,Ltd.
Other Name: ZF2001 vaccine

Placebo Comparator: "0-28 days" placebo group
One dose of recombinant Ad5 vectored COVID-19 vaccine on day 0, the second dose of a commercial influenza vaccine on day 28, a third of subunit vaccine (ZF2001) against COVID-19 on month 4.
Biological: recombinant Ad5 vectored COVID-19 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 Name: Ad5-nCoV

Biological: RBD-based protein subunit vaccine (ZF2001) against COVID-19
This is a recombinant tandem-repeat dimeric RBD-based protein subunit vaccine (ZF2001) against COVID-19, made by using CHO cell, 25μg/dose, produced by Anhui Zhifei Longcom Biopharmaceutical Co.,Ltd.
Other Name: ZF2001 vaccine

Biological: trivalent split influenza vaccine
This vaccine contains 15 μ g H1NI, 15 μ g H3N2 and 15 μ g B-series hemagglutinin, produced by Dalian Aleph Biomedical Co., Ltd.It is a liquid dosage form, 0.5 ml / bottle.

Experimental: "0-56 days" vaccine group
One dose of recombinant Ad5 vectored COVID-19 vaccine on day 0, the second dose of subunit vaccine (ZF2001) against COVID-19 on day 56, a third of subunit vaccine (ZF2001) against COVID-19 on month 4.
Biological: recombinant Ad5 vectored COVID-19 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 Name: Ad5-nCoV

Biological: RBD-based protein subunit vaccine (ZF2001) against COVID-19
This is a recombinant tandem-repeat dimeric RBD-based protein subunit vaccine (ZF2001) against COVID-19, made by using CHO cell, 25μg/dose, produced by Anhui Zhifei Longcom Biopharmaceutical Co.,Ltd.
Other Name: ZF2001 vaccine

Placebo Comparator: "0-56 days" placebo group
One dose of recombinant Ad5 vectored COVID-19 vaccine on day 0, the second dose of a commercial influenza vaccine on day 56, a third of subunit vaccine (ZF2001) against COVID-19 on month 4.
Biological: recombinant Ad5 vectored COVID-19 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 Name: Ad5-nCoV

Biological: RBD-based protein subunit vaccine (ZF2001) against COVID-19
This is a recombinant tandem-repeat dimeric RBD-based protein subunit vaccine (ZF2001) against COVID-19, made by using CHO cell, 25μg/dose, produced by Anhui Zhifei Longcom Biopharmaceutical Co.,Ltd.
Other Name: ZF2001 vaccine

Biological: trivalent split influenza vaccine
This vaccine contains 15 μ g H1NI, 15 μ g H3N2 and 15 μ g B-series hemagglutinin, produced by Dalian Aleph Biomedical Co., Ltd.It is a liquid dosage form, 0.5 ml / bottle.




Primary Outcome Measures :
  1. Incidence of solicited adverse events within 7 days after vaccination. [ Time Frame: Within 7 days after vaccination ]
    Incidence of solicited adverse events within 7 days after vaccination.

  2. GMT of neutralizing antibodies against live SARS-CoV-2 virus at Day 14 after the booster vaccination. [ Time Frame: At Day 14 after the booster vaccination ]
    GMT of neutralizing antibodies against live SARS-CoV-2 virus at Day 14 after the booster vaccination.


Secondary Outcome Measures :
  1. Incidence of adverse reactions within 28 days after vaccination. [ Time Frame: Within 28 days after vaccination ]
    Incidence of adverse reactions within 28 days after vaccination.

  2. Incidence of adverse events within 28 days after vaccination. [ Time Frame: Within 28 days after vaccination. ]
    Incidence of adverse events within 28 days after vaccination.

  3. Incidence of unsolicited AE within 28 days after vaccination. [ Time Frame: Within 28 days after vaccination. ]
    Incidence of unsolicited adverse events within 28 days after vaccination.

  4. Incidence of serious adverse events(SAE) from the first dose to the 6 months after completing the last dose of vaccination. [ Time Frame: From the first dose to the 6 months after completing the last dose of vaccination. ]
    Incidence of serious adverse events(SAE) from the first dose to the 6 months after completing the last dose of vaccination.

  5. GMT of binding antibodies against SARS-CoV-2 S and RBD protein measured by ELISA at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination. [ Time Frame: at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination. ]
    GMT of binding antibodies against SARS-CoV-2 S and RBD protein measured by ELISA at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination.

  6. Proportion of the participants with at least a four-fold increase of the binding antibodies against SARS-CoV-2 S and RBD protein at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination. [ Time Frame: at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination. ]
    Proportion of the participants with at least a four-fold increase of the binding antibodies against SARS-CoV-2 S and RBD protein at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination.

  7. Fold increase of binding antibodies against SARS-CoV-2 S and RBD protein at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination. [ Time Frame: at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination. ]
    Fold increase of binding antibodies against SARS-CoV-2 S and RBD protein measured by ELISA, as compared to baseline, at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination.

  8. GMT of neutralizing antibodies against live SARS-CoV-2 virus at day 28 after the second vaccination, and day 14, month 6 after the third vaccination [ Time Frame: at day 28 after the second vaccination, and day 14, month 6 after the third vaccination ]
    GMT of neutralizing antibodies against live SARS-CoV-2 virus at day 28 after the second vaccination, and day 14, month 6 after the third vaccination

  9. Proportion of the participants with at least a four-fold increase of neutralizing antibodies against live SARS-CoV-2 virus at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination. [ Time Frame: at day 14, day 28 after the second vaccination, and day 14, month 6 after the third vaccination. ]
    Proportion of the participants with at least a four-fold increase of neutralizing antibodies against live SARS-CoV-2 virus, as compared to baseline, at day 28 after the second vaccination, and day 14, month 6 after the third vaccination.

  10. Fold increase of neutralizing antibodies against live SARS-CoV-2 virus at day 14, day 28 after the second vaccination and day 14, month 6 after the third vaccination. [ Time Frame: at day 14, day 28 after the second vaccination and day 14, month 6 after the third vaccination. ]
    Fold increase of neutralizing antibodies against live SARS-CoV-2 virus, as compared to baseline, at day 14, day 28 after the second vaccination and day 14, month 6 after the third vaccination.


Other Outcome Measures:
  1. Types of binding antibodies IgG against SARS-CoV-2 S protein at day 14, day 28 after the second vaccination and day 14, month 6 after the third vaccination. [ Time Frame: at day 14, day 28 after the second vaccination and day 14, month 6 after the third vaccination. ]
    Types of binding antibodies IgG against SARS-CoV-2 S protein at day 14, day 28 after the second vaccination and day 14, month 6 after the third vaccination.

  2. Cross neutralizing of the antibodies to variants of SARS-CoV-2 measured by pseudovirus neutralization test at Day 28 after the booster vaccination. [ Time Frame: At Day 28 after the booster vaccination. ]
    Cross neutralizing of the antibodies to variants of SARS-CoV-2 measured by pseudovirus neutralization test at Day 28 after the booster vaccination.

  3. The immune cells' subgroups and germlines at Day 28 after vaccination. [ Time Frame: At Day 28 after vaccination. ]
    The immune cells', such as B cells and T cells, subgroups and germlines at Day 28 after vaccination.



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.


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

Inclusion Criteria:

  • The subjects ≥ 18 years old who has completed one dose of recombinant Ad5 vectored COVID-19 vaccine.
  • The subjects 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 can 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 these products immunization.

Exclusion Criteria:

  • have a 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 smoothly controlled, such as asthma, diabetes, thyroid disease
  • Congenital or acquired angioedema / neuroedema.
  • have the history of urticaria 1 year before receiving the trial 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 corticosteroid spray 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 trial vaccines.
  • have received another investigational product within one month before injection of trial vaccine.
  • have received attenuated vaccine within 1 month before injection of trial vaccine except the recombinant Ad5 vectored COVID-19 vaccine.
  • have received subunit or inactivated vaccine within 14 days before the vaccination with trial vaccine.
  • 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 various medical, psychological, social or other conditions.

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): NCT04833101


Locations
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China, Jiangsu
Jiangsu Provincial Center for Diseases Control and Prevention
Nanjing, Jiangsu, China
Sponsors and Collaborators
Jiangsu Province Centers for Disease Control and Prevention
Investigators
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Principal Investigator: Jing-Xin Li, PhD Jiangsu Provincial Center for Diseases Control and Prevention
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Responsible Party: Jiangsu Province Centers for Disease Control and Prevention
ClinicalTrials.gov Identifier: NCT04833101    
Other Study ID Numbers: JSVCT115
First Posted: April 6, 2021    Key Record Dates
Last Update Posted: August 11, 2021
Last Verified: June 2021

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Jiangsu Province Centers for Disease Control and Prevention:
SARS-CoV-2 Vaccine
Recombinant Ad5 Vector
Subunit Vaccine
Safety
Immunogenicity
Additional relevant MeSH terms:
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Vaccines
Immunologic Factors
Physiological Effects of Drugs