Phase I Trial of a Recombinant SARS-CoV-2 Vaccine (Sf9 Cell)

NCT ID: NCT04530656

Last Updated: 2022-06-01

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE1

Total Enrollment

168 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-08-28

Study Completion Date

2021-11-23

Brief Summary

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This is a phase I, single-center, randomized, placebo-controlled, double-blind study, to evaluate safety, tolerability and immunogenicity of a recombinant SARS-CoV-2 vaccine (Sf9 cell) in Chinese healthy population aged 18 years and older. After randomization, the trial for each subject will last for approximately 13 months. Screening period is 1 week prior to randomization (Day -7 to Day -1), and each dose of either SARS-CoV-2 vaccine (Sf9 Cell) or placebo will be given intramuscularly (IM) on Day 0 and Day 28 for a two-dose regimen, or on Day 0, Day 14, and Day 28 for a three-dose regimen. Subjects who are ≥18 years old and ≤ 55 years old will be enrolled in adult group, and healthy elderly population who are \>55 years old will be enrolled in elderly group. After adult group completes the follow-up 7 days after first vaccination, elderly group will be recruited.

Detailed Description

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This is a phase I, single-center, randomized, placebo-controlled, double-blind study, to evaluate safety, tolerability and immunogenicity of a recombinant SARS-CoV-2 vaccine (Sf9 cell) in Chinese healthy population aged 18 years and older. Healthy adults who are ≥18 years old and ≤55 years old will be enrolled in the adult group and healthy elderly population who are \>55 years old will be enrolled in the elderly group. To ensure the enrollment of healthy subjects, screening tests (hematology, biochemistry, and urinalysis) will be performed prior to the vaccination. In each age group, there are three regimen cohort: middle-dose at 0, 28 schedule, high-dose at 0, 28 schedule, and high-dose at 0,14,28 schedule. The subjects in regimen cohort will be randomized to receive vaccines or placebos at a ratio of 3:1.

The study will set up an Independent Data Monitoring Committee (IDMC) to conduct overall supervision. The IDMC is required to review the unblinded data when a significant event or risk occurs in the study that might cause the study to be suspended.

Conditions

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COVID-19

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

TRIPLE

Participants Caregivers Investigators

Study Groups

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Middle-dose vaccine (18-55 years) & Two dose regimen

Two doses of middle-dose experimental vaccine at the schedule of day 0, 28.

Group Type EXPERIMENTAL

Two doses of middle-dose recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28

Intervention Type BIOLOGICAL

Two doses of middle-dose (20µg/ 0.5ml) recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28.

Middle-dose vaccine (> 55 years) & Two dose regimen

Two doses of middle-dose experimental vaccine at the schedule of day 0, 28.

Group Type EXPERIMENTAL

Two doses of middle-dose recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28

Intervention Type BIOLOGICAL

Two doses of middle-dose (20µg/ 0.5ml) recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28.

High-dose vaccine (18-55 years) & Two dose regimen

Two doses of high-dose experimental vaccine at the schedule of day 0, 28.

Group Type EXPERIMENTAL

Two doses of high-dose recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28

Intervention Type BIOLOGICAL

Two doses of high-dose (40µg/ 1.0ml) recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28.

High-dose vaccine (> 55 years) & Two dose regimen

Two doses of high-dose experimental vaccine at the schedule of day 0, 28.

Group Type EXPERIMENTAL

Two doses of high-dose recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28

Intervention Type BIOLOGICAL

Two doses of high-dose (40µg/ 1.0ml) recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28.

High-dose vaccine (18-55 years) & Three dose regimen

Three doses of high-dose experimental vaccine at the schedule of day 0, 14, 28.

Group Type EXPERIMENTAL

Three doses of high-dose recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 14, 28

Intervention Type BIOLOGICAL

Three doses of high-dose (40µg/ 1.0ml) recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 14, 28

High-dose vaccine (> 55 years) & Three dose regimen

Three doses of high-dose experimental vaccine at the schedule of day 0, 14, 28.

Group Type EXPERIMENTAL

Three doses of high-dose recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 14, 28

Intervention Type BIOLOGICAL

Three doses of high-dose (40µg/ 1.0ml) recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 14, 28

Middle-dose placebo (18-55 years) & Two dose regimen

Two doses of middle-dose placebo at the schedule of day 0, 28.

Group Type PLACEBO_COMPARATOR

Two doses of placebo at the schedule of day 0, 28(middle-dose group)

Intervention Type BIOLOGICAL

Two doses of placebo (0.5ml) at the schedule of day 0, 28

Middle-dose placebo (> 55 years) & Two dose regimen

Two doses of middle-dose placebo at the schedule of day 0, 28.

Group Type PLACEBO_COMPARATOR

Two doses of placebo at the schedule of day 0, 28(middle-dose group)

Intervention Type BIOLOGICAL

Two doses of placebo (0.5ml) at the schedule of day 0, 28

High-dose placebo (18-55 years) & Two dose regimen

Two doses of high-dose placebo at the schedule of day 0, 28.

Group Type PLACEBO_COMPARATOR

Two doses of placebo at the schedule of day 0, 28(high-dose group)

Intervention Type BIOLOGICAL

Two doses of placebo (1.0ml) at the schedule of day 0, 28

High-dose placebo (> 55 years) & Two dose regimen

Two doses of high-dose placebo at the schedule of day 0, 28.

Group Type PLACEBO_COMPARATOR

Two doses of placebo at the schedule of day 0, 28(high-dose group)

Intervention Type BIOLOGICAL

Two doses of placebo (1.0ml) at the schedule of day 0, 28

High-dose placebo (18-55 years) & Three dose regimen

Three doses of high-dose placebo at the schedule of day 0, 14, 28.

Group Type PLACEBO_COMPARATOR

Three doses of placebo at the schedule of day 0, 14, 28(high-dose group)

Intervention Type BIOLOGICAL

Three doses of placebo (1.0ml) at the schedule of day 0, 14, 28

High-dose placebo (> 55 years) & Three dose regimen

Three doses of high-dose placebo at the schedule of day 0, 14, 28.

Group Type PLACEBO_COMPARATOR

Three doses of placebo at the schedule of day 0, 14, 28(high-dose group)

Intervention Type BIOLOGICAL

Three doses of placebo (1.0ml) at the schedule of day 0, 14, 28

Interventions

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Two doses of middle-dose recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28

Two doses of middle-dose (20µg/ 0.5ml) recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28.

Intervention Type BIOLOGICAL

Two doses of high-dose recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28

Two doses of high-dose (40µg/ 1.0ml) recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 28.

Intervention Type BIOLOGICAL

Three doses of high-dose recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 14, 28

Three doses of high-dose (40µg/ 1.0ml) recombinant SARS-CoV-2 vaccine (Sf9 Cell) at the schedule of day 0, 14, 28

Intervention Type BIOLOGICAL

Two doses of placebo at the schedule of day 0, 28(middle-dose group)

Two doses of placebo (0.5ml) at the schedule of day 0, 28

Intervention Type BIOLOGICAL

Two doses of placebo at the schedule of day 0, 28(high-dose group)

Two doses of placebo (1.0ml) at the schedule of day 0, 28

Intervention Type BIOLOGICAL

Three doses of placebo at the schedule of day 0, 14, 28(high-dose group)

Three doses of placebo (1.0ml) at the schedule of day 0, 14, 28

Intervention Type BIOLOGICAL

Eligibility Criteria

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Inclusion Criteria

* Male or female subjects of ≥ 18 years old with body mass index (BMI) ≥ 18.5 and ≤ 30 at the Screening Visit.
* The subject can provide with informed consent and signs and dates a written informed consent form (ICF) prior to the initiation of any trial procedures.
* They must be able to understand and follow trial-related instructions.
* They must be willing and able to comply with planned visits, treatment schedule, laboratory tests and other requirements of the trial.
* Negative HIV antibody when screening.
* Axillary temperature ≤ 37.0ºC.
* Negative in nucleic acid screening of SARS-CoV-2.
* Negative in antibodies (IgG and IgM) screening of SARS-CoV-2.
* No imaging features of COVID-19 in chest CT.
* There were no significant abnormalities in blood routine, blood biochemistry, coagulation function and urine routine, or no clinical significance was determined by doctors (including white blood cell count, lymphocyte count, neutrophil count, platelet, hemoglobin, glutamic pyruvic transaminase ALT, glutamic oxaloacetic transaminase AST, total bilirubin, fasting blood glucose, creatinine, prothrombin time, partially activated prothrombin time, urine protein, urine red blood cells).
* Healthy subjects who have been examined by medical history, physical examination and clinical examination are in accordance with the immunization of this vaccine.

* Other exclusion reasons determined by the investigators.

Exclusion Criteria

* Subjects with a medical or family history of convulsions, epilepsy, encephalopathy, and psychosis.
* Allergic to any ingredient in the study vaccine, or used to have a serious vaccine allergic reaction.
* Women who are positive for urine pregnancy test. Women who are pregnant or breastfeeding or planning to be pregnant within 6 months.
* Have acute febrile diseases or infectious diseases.
* History of SARS, SARS-CoV-2 or MERS infection.
* People with serious cardiovascular diseases, such as arrhythmia, conduction block, myocardial infarction, severe hypertension and can not control using drugs.
* Patients with severe chronic diseases or progressive conditions can not be smoothly controlled, such as asthma, diabetes, and thyroid diseases.
* Have congenital or acquired angioedema/neuroedema.
* Had urticaria 1 year before receiving the study vaccine.
* Asplenium or functional aspleen.
* Have thrombocytopenia or other coagulation disorders (may cause contraindications to intramuscular injection).
* Have acupuncture syncope reaction.
* Have received immunosuppressant therapy, anti-allergic therapy, cytotoxic therapy, inhaled corticosteroids in the past 6 months (excluding corticosteroid spray therapy for allergic rhinitis, and surface corticosteroid therapy for acute non-complicated dermatitis).
* Received blood products within 4 months before receiving the study vaccine.
* Received other study drugs within 1 month before receiving the study vaccine.
* Received a live attenuated vaccine within 1 month before receiving the study vaccine.
* Received a subunit or inactivated vaccine within 14 days before receiving the study vaccine.
* Are receiving anti-tuberculosis treatment.
* According to the judgment of the researchers, due to a variety of medical, psychological, social or other conditions, it is contrary to the trial scheme, or affects the subjects to sign informed consent.
* It is contrary to the trial protocol, or affects the subjects to sign informed consent due to various medical, psychological, social or other conditions, according to the investigator's judgment.


* Have had a severe allergic reaction after the previous dose of vaccination.
* Those with serious adverse events that are causally related to the previous dose of vaccination.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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West China Hospital

OTHER

Sponsor Role collaborator

Jiangsu Province Centers for Disease Control and Prevention

NETWORK

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Fengcai Zhu, Doctor

Role: PRINCIPAL_INVESTIGATOR

Jiangsu Provincial Center for Disease Control and Prevention

Locations

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Jiangsu Provincial Center for Diseases Control and Prevention

Nanjing, Jiangsu, China

Site Status

Countries

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China

Other Identifiers

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JSVCT098

Identifier Type: -

Identifier Source: org_study_id

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