A Heterologous Prime-boost Study to Evaluate Immunogenicity and Safety of mRNA-1273 With MVC-COV1901 in Adults

Phase 4

Completed

• Conditions: Covid19 Vaccine
• Interventions: Biological: Homologous boost schedule; Biological: Heterologous boost schedule

• Registration Number: NCT05079633
• Lead Sponsor: National Taiwan University Hospital

Brief Summary

The primary objective of the study is to evaluable the safety and to demonstrate the immunogenicity of heterologous prime-boost (mRNA-1273, MVC-COV1901), compared to homologous prime-boost (mRNA-1273), with an interval of 8-12 weeks, This study also assesses the safety and tolerability of the study intervention and explores the immunogenicity by the antigen-specific immunoglobulin, the immunogenicity against the VoCs, the antigen specific cellular immune response, as well as the potential efficacy of study intervention in preventing COVID-19.

Detailed Description

This is a parallel group, prospective, randomized, double-blind, two-arm, single-center study to be conducted in approximately 220 healthy participants aged 20 to 70 years who are generally healthy or with stable pre-existing health condition.

The participants should previously have their first dose of mRNA-1273. The participants, investigators, and the site personnel will be blinded to the study intervention assignment until all the participants complete their Day 29. Preparation and administration of study intervention will be performed by authorized unblinded site personnel who do not participate in the evaluation of the participants.

Eligible participants will be randomized to receive either mRNA-1273 or MVC-COV1901 vaccine at a 1:1 ratio. Randomization of participants will be stratified by the interval apart from their first dose of mRNA-1273 (\< 10 weeks or ≥ 10 weeks).

The study consists of 6 on-site visits:

Day -28 to Day 1, Visit 1 (Screening) Day 1, Visit 2 (study intervention) Day 15 ± 3 days, Visit 3 Day 29 ± 3 days, Visit 4 Day 91 ± 14 days, Visit 5 Day 181 ± 14 days, Visit 6 Unscheduled visit(s) may be arranged when deemed necessary by the investigator.

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study First Submitted: 2021-09-23
• Study Start: 2021-09-30
• Study First Submitted QC: 2021-10-03
• Primary Completion: 2021-10-08
• Study First Posted: 2021-10-15
• Status Verified: 2023-01
• Study Completion: 2023-01-10
• Last Update Submitted: 2024-03-20
• Last Update Posted: 2024-03-22

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 220

Inclusion Criteria

1. Male or female participant aged ≥20 to <70 years at randomization.

2. Has received one dose of the mRNA-1273 8 to 12 weeks before randomization.

3. Female participant must:

   1. Be either of non-childbearing potential, i.e. surgically sterilized (defined as having undergone hysterectomy and/or bilateral oophorectomy and/or bilateral salpingectomy; tubal ligation alone is not considered sufficient) or one year post-menopausal;
   2. Or, if of childbearing potential, be abstinent or agree to use medically effective contraception from 14 days before screening to 30 days following the last administration of study intervention. Acceptable forms include:

   i. Implanted hormonal methods of contraception or placement of an intrauterine device or intrauterine system ii. Established use of hormonal methods (injectable, pill, patch or ring) combined with barrier methods of contraception: condom or occlusive cap (diaphragm or cervical/vault caps) with spermicidal foam/gel/film/cream/suppository c. Have a negative pregnancy test

4. Participant is willing and able to comply with all required study visits and follow-up required by this protocol.

5. Participant or the participant's legal representative must understand the procedures of the study and provide written informed consent.

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Exclusion Criteria

1. Pregnant or breast feeding or have plan to become pregnant within 30 days after the administration of study intervention.
2. Currently receiving or received any investigational intervention within 30 days prior to the study intervention.
3. Administered any licensed live-attenuated vaccines within 28 days or other licensed non-live-attenuated vaccines within 7 days prior to the study intervention.
4. Administered any blood product or intravenous immunoglobulin administration within 12 weeks prior to the study intervention.
5. Currently receiving or anticipate to receive concomitant immunosuppressive or immune-modifying therapy (excluding inhaled, topical skin and/or eye drop-containing corticosteroids, low-dose methotrexate, or < 2 weeks of daily receipt of prednisone less than 20 mg or equivalent) within 12 weeks prior to the study intervention.
6. Currently receiving or anticipate to receive treatment with tumor necrosis factor (TNF)-α inhibitors, e.g. infliximab, adalimumab, etanercept within 12 weeks prior to the study intervention.
7. Major surgery or any radiation therapy within 12 weeks prior to the study intervention.
8. Has received any investigational or licensed COVID-19 vaccine other than mRNA-1273, or ≥ two doses of mRNA-1273.
9. Immunosuppressive illness or immunodeficient state, including hematologic malignancy, history of solid organ, bone marrow transplantation, or asplenia.
10. A history of malignancy with potential risk for recurrence after curative treatment, or current diagnosis of or treatment for cancer (exceptions are squamous and basal cell carcinomas of the skin and treated uterine cervical carcinoma in situ, at the discretion of the investigator).
11. Bleeding disorder considered a contraindication to IM injection or phlebotomy.
12. Known SARS-CoV-2 infection in the recent 3 months prior to the study intervention.
13. A history of cerebral venous sinus thrombosis, heparin-induced thrombocytopenia or antiphospholipid syndrome.
14. Participant who, in the investigator's judgement, is not in a stable condition and by participating in the study could adversely affect the safety of the participant, interfere with adherence to study requirements or evaluation of any study endpoint. This may include a participant with ongoing acute diseases, severe infections, autoimmune disease, laboratory abnormality or serious medical conditions in the following systems: cardiovascular, pulmonary, hepatic, neurologic, metabolic, renal, or psychiatric.
15. A history of hypersensitivity to any vaccine or a history of allergic disease or reactions likely to be exacerbated by any component of the mRNA-1273 or MVC-COV1901.
16. Body (oral, rectal, or ear) temperature ≥ 38.0°C or acute illness (not including minor illnesses such as diarrhea or mild upper respiratory tract infection at the discretion of the investigator) within 2 days before the study intervention.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Moderna COVID-19 vaccine (mRNA 1273)	Homologous boost schedule	110 participants will be randomly assigned to Moderna COVID 19
Medigen COVID-19 vaccine (MVC COV1901)	Heterologous boost schedule	110 participants will be randomly assigned to Medigen COVID 19 vaccine

Primary Outcome Measures

Name	Time	Method
Primary Immunogenicity-GMT	Day 1 to Day 15	To evaluate the immunogenicity of heterologous prime boost (mRNA 1273, MVC-COV1901), compared to homologous prime boost (mRNA 1273), in terms of neutralizing antibody titers at 14 days after the study intervention; -Geometric mean titer (GMT)
Primary Immunogenicity-SCR	Day 1 to Day 15	To evaluate the immunogenicity of heterologous prime boost (mRNA 1273, MVC-COV1901), compared to homologous prime boost (mRNA 1273), in terms of neutralizing antibody titers at 14 days after the study intervention; -Seroconversion rate (SCR)
Primary Immunogenicity-GMR	Day 1 to Day 15	To evaluate the immunogenicity of heterologous prime boost (mRNA 1273, MVC-COV1901), compared to homologous prime boost (mRNA 1273), in terms of neutralizing antibody titers at 14 days after the study intervention; -GMT ratio
Primary Safety	Day 1 to Day 29	To evaluate the safety and tolerability of heterologous prime boost (mRNA 1273, MVC-COV1901), compared to homologous prime boost (mRNA 1273) from Day 1 to Day 29; The number and percentage of participants with the occurrence of: * Solicited local adverse events (AEs); * Solicited systemic AEs; * Unsolicited AEs

Secondary Outcome Measures

Name	Time	Method
Secondary Immunogenicity-GMT	Day 29 to Day 181	To evaluate the immunogenicity of heterologous prime-boost (mRNA-1273, MVC-COV1901), compared to homologous prime-boost (mRNA-1273) in terms of neutralizing antibody titers at 28 days, 90 days, and 180 days after the study intervention; -Geometric mean titer (GMT)
Secondary Immunogenicity-GMR	Day 29 to Day 181	To evaluate the immunogenicity of heterologous prime-boost (mRNA-1273, MVC-COV1901), compared to homologous prime-boost (mRNA-1273) in terms of neutralizing antibody titers at 28 days, 90 days, and 180 days after the study intervention; -GMT ratio
Secondary Safety	Day 1 to Day 181	To evaluate the safety of heterologous prime-boost (mRNA-1273, MVC-COV1901), compared to homologous prime-boost (mRNA-1273) throughout the study; The number and percentage of participants with the occurrence of: * Medically Attended Adverse Events (MAAEs); * Adverse Event of Special Interest (AESIs); * Vaccine-Associated Enhanced Disease (VAED); * Serious Adverse Events(SAEs)
Secondary Immunogenicity-SCR	Day 29 to Day 181	To evaluate the immunogenicity of heterologous prime-boost (mRNA-1273, MVC-COV1901), compared to homologous prime-boost (mRNA-1273) in terms of neutralizing antibody titers at 28 days, 90 days, and 180 days after the study intervention; -Seroconversion rate (SCR)

Trial Locations

Locations (1)

National Taiwan University Hospital; 🇨🇳 Taipei, Taiwan