Safety immunogenicity study of MT-2766 in Japanese adults (COVID-19)
- Conditions
- COVID-19
- Registration Number
- JPRN-jRCT2051210093
- Lead Sponsor
- Kondo Kazuoki
- Brief Summary
eutralizing antibody (Nab) response, Specific Th1 cell-mediated immune (CMI) and Specific Th2 CMI responses were higher in the MT-2766 group than in the placebo group on Day 42. Nab response, specific Th1 and specific Th2 CMI response through Day 201 were higher in the MT-2766 group compared to the placebo group despite decreasing over time compared to Day 42, suggesting persistence of Nab response and specific Th1 and Th2 CMI response. There were no significant safety concerns in this study.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Complete
- Sex
- All
- Target Recruitment
- 128
Subjects must meet all of the following inclusion criteria at the Screening visit (Visit 1) and/or 1st vaccination visit (Visit 2) to be eligible for participation in this study. All Investigator assessment-based judgments must be carefully and fully documented in the source documents:
1. Subjects must have read, understood, and signed the informed consent form (ICF) prior to participating in the study; subjects must also complete study-related procedures and must communicate with the study staff at visits and by phone during the study;
2. At the Screening visit (Visit 1), Japanese male and female subjects must be >=20 years of age;
3. At the Screening visit (Visit 1) and 1st vaccination visit (Visit 2), subject must have a body mass index (BMI) of >=18.5 kg/m2 and <30 kg/m2;
4. Subjects are considered by the Investigator to be reliable and likely to cooperate with the assessment procedures and be available for the duration of the study;
5. Female subjects of childbearing potential must have a negative serum pregnancy test result at the Screening visit (Visit 1) and a negative urine pregnancy test result at 1st vaccination visit (Visit 2):
Non-childbearing females are defined as:
- Surgically sterile (defined as bilateral tubal ligation, hysterectomy or bilateral oophorectomy performed more than one month prior to the first study vaccination);
OR
- Post-menopausal (absence of menses for 12 consecutive months and age consistent with natural cessation of ovulation);
6. Female subjects of childbearing potential must use an effective method of contraception for one month prior to 1st vaccination visit (Visit 2) and agree to continue employing highly effective birth control measures for at least one month after the last study vaccination (or in the case of early termination, she must not plan to become pregnant for at least one month after her last study vaccination);
7. Subjects must be non-institutionalized (e.g. not living in rehabilitation centers or old-age homes; subjects who can live independently are acceptable);
8. Subjects have no acute or evolving medical problems prior to study participation and no clinically relevant abnormalities that could jeopardize subject safety or interfere with study assessments, as assessed by the Principal Investigator or sub-Investigator (thereafter referred as Investigator) and determined by medical history, physical examination, serology, clinical chemistry and hematology tests, urinalysis, and vital signs. Investigator discretion is permitted with this inclusion criterion.
Subjects who meet any of the following exclusion criteria at the Screening visit (Visit 1) and/or 1st vaccination visit (Visit 2) will not be eligible for participation in this study. All Investigator assessment-based judgments must be carefully and fully documented in the source documents:
1. According to the Investigator's opinion, significant acute or chronic, uncontrolled medical or neuropsychiatric illness.
Acute disease is defined as presence of any moderate or severe acute illness with or without a fever within 48 hours prior to the Screening visit (Visit 1) and/or 1st vaccination visit (Visit 2).
'Uncontrolled' is defined as:
- Requiring a new medical or surgical treatment during the three months prior to study vaccine administration;
- Requiring any significant change in a chronic medication (i.e. drug, dose, frequency) during the three months prior to study vaccine administration due to uncontrolled symptoms or drug toxicity unless the innocuous nature of the medication change meets the criteria outlined in inclusion criterion no. 8 and is appropriately justified by the Investigator.
Investigator discretion is permitted with this exclusion criterion.
2. Any confirmed or suspected current immunosuppressive condition or immunodeficiency, including cancer, HIV, hepatitis B or C infection (subjects with a history of cured hepatitis B or C infection without any signs of immunodeficiency at present time are allowed). Investigator discretion is permitted with this exclusion criterion;
3. Current autoimmune disease (such as rheumatoid arthritis, systemic lupus erythematosus or multiple sclerosis). Investigator discretion is permitted with this exclusion criterion. Subjects may be eligible to participate with appropriate written justification in the source document. For example, subjects with a history of autoimmune disease who are disease-free without treatment for three years or more, subjects receiving stable thyroid replacement therapy, and subjects with mild psoriasis (i.e. a small number of minor plaques requiring no systemic treatment) are eligible for participation;
4. Administration of any medication or treatment that may alter the vaccine immune responses, such as:
- Systemic glucocorticoids at a dose exceeding 10 mg of prednisone (or equivalent) per day for more than seven consecutive days or for 10 or more days in total, within one month prior to the 1st vaccination visit (Visit 2). Inhaled, nasal, ophthalmic, dermatological, and other topical glucocorticoids are permitted;
- Cytotoxic, antineoplastic, or immunosuppressant drugs - within 36 months prior to 1st vaccination visit (Visit 2);
- Any immunoglobulin preparations, blood products, or blood transfusion - within 6 months prior to 1st vaccination visit (Visit 2);
5. Administration of any vaccine within 14 days prior to 1st vaccination visit (Visit 2); planned administration of any vaccine during the study (up to Day 28). Immunization on an emergency basis during the study will be evaluated on case-by-case basis by the Investigator;
6. Administration of any other SARS-CoV-2/COVID-19 vaccine, or other experimental coronavirus vaccine at any time prior to or during the study;
7. At screening (Visit 1), subjects found to be seropositive for prior SARS-COV-2 infection based on N-protein ELISA or positive for SARS-COV-2 PCR test;
8. Subjects with previous diagnosis of COVID-19 or previous positive SARS-CoV-2 infection
9. Use of any investigational or non-registered product
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method
- Secondary Outcome Measures
Name Time Method