Clinical trial NCT05788185: Safety & Immunogenicity of RVM-V001/RVM-V002 or RVMV001+RVMV002 (Co Administered as Separate Injections) in Healthy Individuals
Official title: Phase 1b, Randomized, Open-label Study to Evaluate the Safety, Tolerability, and Immunogenicity of RVM-V001 Only, RVM-V002 Only, or RVM V001 + RVM V002 (Co Administered as Separate Injections) in Healthy Adults Previously Vaccinated With an Inactivated Virus or mRNA-based COVID-19 Vaccine in Singapore
Study type: INTERVENTIONAL
Overall status: TERMINATED
Phase: PHASE1
PHASE2
Conditions: Infectious Disease
COVID-19
Lead sponsor: RVAC Medicines (US), Inc.
Sponsor class: OTHER
First posted: 2023-03-28
Enrollment: 24
Sex: ALL
Minimum age (years): 21
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: Phase 1b, randomized, open-label, study to evaluate the safety, tolerability, and immunogenicity of RVM-V001 only, RVM-V002 only, or RVM V001 + RVM V002 (Co administered as Separate Injections) in healthy adults. The study will be conducted at one site in Singapore.

Detailed description: A total of 48 healthy men and non-pregnant women aged 21 years and older will be stratified by prior vaccination. Twenty-four subjects who have received a 3 dose primary vaccination series, with or without 1 booster dose, of an approved inactivated virus vaccine (BBIBP-CorV or CoronaVac) will be randomized at a 1:1:1 ratio to receive RVM V001 (30 µg) only, RVM V002 (30 µg) only, or RVM-V001 (15 µg) + RVM V002 (15ug).

An additional 24 subjects who have received 3 doses (primary vaccination series and 1 booster dose) of an mRNA vaccine (BNT162b2) will be randomized at 1:1:1 ratio to receive RVM-V001 (30 µg) only, RVM V002 (30 µg) only, or RVM-V001 (15 µg ) + RVM V002 (15 µg ). The last dose of the prior vaccination should have been administered at least 6 months prior to enrolment in this study. For administration of RVM V001 only or RVM V002 only, subjects will receive a single dose of RVM-V001 or RMV-V002 vaccine on Day 1 via intramuscular (IM) injection into deltoid muscle, preferably of the non-dominant arm.

For the RVM V001 + RVM V002 administration, subjects will receive a single dose of RVM-V001 in the left arm deltoid muscle and then followed immediately with a single dose of RVM-V002 in the right arm deltoid muscle.

Eligibility criteria: Inclusion Criteria:

* Male and female healthy volunteers.
* Aged 21 years and older on Day 1
* Judged by the investigator to be healthy based on medical history, physical examination, and vital signs evaluation at Screening visit.
* Able to provide informed consent form.
* Able and willing to comply with all study procedures over follow-up period of approximately 6 months.
* Have documented completion of a 2-dose primary vaccination series and 1 booster vaccination with BNT162b2 OR a 3-dose primary vaccination series, with or without 1 booster dose, with an approved inactivated virus vaccine (BBIBP-CorV or CoronaVac). The last dose in all cases should have been administered at least 6 months prior to enrolment in this study.
* For female subjects with childbearing potential: must agree to avoid pregnancy from 21 days prior to Day 1 until at least 90 days after the last study vaccination. Women physically capable of pregnancy (not sterilized and still menstruating or within 1 year of the last menses if menopausal) in sexual relationships with men must use an acceptable method of avoiding pregnancy during this period.

Exclusion Criteria:

* Received any COVID-19 vaccine other than BNT162b2, BBIBP-CorV, or CoronaVac.
* Received more than 3 doses of BNT162b2 or more than 4 doses of BBIBP-CorV or CoronaVac.
* Women who are pregnant or breastfeeding or intending to become pregnant; mend who will father children within the projected duration of the trial.
* Positive serology test results for hepatitis C virus antibody, human immunodeficiency virus antibody, or hepatitis B viral surface antigen at Screening.
* Is currently participating in or has participated in a study with an investigational product within 30 days preceding Day 1.
* History of severe allergic reactions (eg, acute anaphylaxis, urticaria, skin eczema, dyspnoea, angioneurotic oedema) or other significant adverse reactions to COVID19 vaccines; allergy to known composition of RVM-001 and RVM-002.
* History of coagulation dysfunction (eg, coagulation factor deficiency, coagulation disease).
* Vaccinated with live attenuated vaccine within 1 month, or any other vaccine within 14 days, of Day 1 vaccination.
* Received systemic immunosuppressants within 4 months prior to vaccination or an anticipated need for immunosuppressants at any time during the study. Topical or inhaled treatment is allowed if not used within 14 days prior to Day 1 vaccination.
* Received blood products within 3 months prior to Day 1 vaccination.
* History of alcohol or drug abuse within 3 years prior to Day 1 vaccination.
* Fever (temperature \> 37.5°C), dry cough, fatigue, nasal obstruction, runny nose, sore throat, myalgia, diarrhoea, shortness of breath, or dyspnoea on the day of vaccination.
* Any condition that, in the opinion of the investigator, would pose a health risk to the subject if enrolled, could interfere with the evaluation of the study vaccine, or interfere with interpretation of the study results (including neurologic or psychiatric conditions deemed likely to impair the quality of safety reporting).

Primary outcomes:
measure: Safety in terms of solicited adverse events
timeFrame: Day 1 to Day 7 inclusive
measure: Safety in terms of solicited systemic adverse events
timeFrame: Day 1 to Day 7 inclusive
measure: Safety in terms of unsolicited adverse events
timeFrame: Day 1 to Day 28 inclusive
measure: Safety in terms of SAEs, SUSARs, MAAEs and AESIs
timeFrame: Day 1 to Day 180 post dose
measure: Safety in terms of laboratory-based AEs
timeFrame: Day 1 to Day 180 post dose
Secondary outcomes:
measure: Immunogenicity in terms of Nab
timeFrame: Days 1,8,15,29 and 180
measure: GMT of neutralizing antibody (pseudoviral neutralization assay) against Variants of Immunogenicity in terms of Nab
timeFrame: Days 1,8,15,29 and 180
measure: Immunogenicity in terms of Humoral immune response by ELISA
timeFrame: Days 1,8,15,29 and 180
measure: Seroresponse rate for neutralizing antibody
timeFrame: Days 8,15,29 and 180
measure: Seroresponse rate for binding antibodies (IgG) by ELISA
timeFrame: Days 8,15,29 and 180
measure: Geometric Mean Fold Rise (GMFR) of SARS-CoV-2 Neutralizing Antibody
timeFrame: Days 8,15,29 and 180
measure: Geometric Mean Fold Rise (GMFR) of binding antibodies (IgG) by ELISA
timeFrame: Days 8,15,29 and 180
Other outcomes:
Locations:
city: Singapore
country: Singapore
facility: P.H. Feng Research Centre, NCID,TTSH
Study officials:
References: