A Study to Evaluate the Safety, Tolerability, and Immunogenicity of a Recombinant Respiratory Syncytial Virus Vaccine

NCT06754605 | Recruiting Phase 1

• 1 other identifier: SCTV02-X201
• Study Type: interventional
• Target: 480
• Locations: 1 country
• Sites: 2

Brief Summary

This is a randomised, double-blind, placebo-controlled Phase 1/2 clinical trial to evaluate the safety, tolerability and immunogenicity of recombinant respiratory syncytial virus in participants aged 18 years and older.

Conditions

Respiratory Syncytial Virus

Outcome Measures

Primary Outcomes (2)

• Incidence and severity of solicited adverse events within 7 days post study vaccination.

  Incidence and severity of solicited adverse events within 7 days post study vaccination.

  Day o to Day 7

• Geometric mean titer (GMT) of neutralizing antibodies (nAb) against RSV-A and RSV-B subtypes 30 days post vaccination

  Geometric mean titer (GMT, Live Virus Neutralization Test) of neutralizing antibodies (nAb) against RSV-A and RSV-B subtypes 30 days after study vaccination.

  Day 30

Secondary Outcomes (7)

• GMT of nAb against RSV-A and RSV-B subtypes 14 days after study vaccination.Immunogenicity 14 days post vaccination

  Day 14

• GMT of nAb against RSV-A and RSV-B subtypes 90 days post vaccination

  Day 90

• GMT of nAb against RSV-A and RSV-B subtypes 180 days post vaccination

  Day 180

• GMT of nAb against RSV-A and RSV-B subtypes 365 days post vaccination

  Day 365

• T cell response

  Day 30

Study Arms (10)

A: Low dose vaccine

EXPERIMENTAL

Low dose of SCTV02, injected on Day 0

Biological: SCTV02

A: Low dose placebo

PLACEBO COMPARATOR

Placebo comparator of low dose, injected on Day 0

Biological: Placebo

B: Medium dose vaccine

EXPERIMENTAL

Medium dose of SCTV02, injected on Day 0

Biological: SCTV02

B: Medium dose placebo

PLACEBO COMPARATOR

Placebo comparator of medium dose, injected on Day 0

Biological: Placebo

C: High dose vaccine

EXPERIMENTAL

High dose of SCTV02, injected on Day 0

Biological: SCTV02

C: High dose placebo

PLACEBO COMPARATOR

Placebo comparator of high dose, injected on Day 0

Biological: Placebo

D: Low dose vaccine

EXPERIMENTAL

Low dose of SCTV02, injected on Day 0

Biological: SCTV02

E: Medium dose vaccine

EXPERIMENTAL

Medium dose of SCTV02, injected on Day 0

Biological: SCTV02

F: High dose vaccine

EXPERIMENTAL

High dose of SCTV02, injected on Day 0

Biological: SCTV02

G: Placebo

PLACEBO COMPARATOR

Placebo comparator, injected on Day 0

Biological: Placebo

Interventions

SCTV02 BIOLOGICAL

Participants will receive a singe dose of SCTV02 on Day 0.

A: Low dose vaccine; B: Medium dose vaccine; C: High dose vaccine; D: Low dose vaccine; E: Medium dose vaccine; F: High dose vaccine

Placebo BIOLOGICAL

Participants will receive a singe dose of Placebo on Day 0.

A: Low dose placebo; B: Medium dose placebo; C: High dose placebo; G: Placebo

Eligibility Criteria

• Age: 18 Years - 120 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Phase I: male and female participants ≥18 years old at the time of signing the ICF; Phase II: male and female participants ≥50 years of age at the time of signing the ICF.
• Be able to sign a written Informed consent form (ICF) and participate in the trial voluntarily, and can fully understand the trial procedures and risks of participating in the trial.
• Be able to complete the diary card, contact card and diary/contact card by own or with the assistance of others.
• Phase I: healthy subjects or healthy subjects judged by the investigator according to the clinical data of the subjects; Stage II: Subjects who are healthy or have a stable underlying disease.
• Fertile men and women of childbearing age voluntarily agree to use effective contraception from the time they sign the ICF until 6 months after immunization; Pregnancy test results for women of childbearing age during the screening period were negative.

You may not qualify if:

• Acute illness and/or fever (axillary temperature ≥37.3 ° C) occurred within 3 days prior to vaccination with the study vaccine, or antipyretic, analgesic, or antiallergic drugs.
• Use any investigational or unregistered product within 30 days prior to immunization, or plan to use any such product during the study period.
• Concurrent participation in another clinical study where the subject has been or will be exposed to an investigational or non-investigational vaccine/product at any time during the study.
• Long-term or high-dose glucocorticoid therapy (duration ≥15 days, or dose ≥1 mg/kg/ day of prednisone or equivalent doses of other glucocorticoids), or other immunosuppressive and cytotoxic therapy within 90 days prior to vaccination.
• The study received a non-attenuated vaccine within 14 days prior to vaccination, or a live attenuated vaccine within 28 days; Have previously received the experimental respiratory syncytial virus (RSV) vaccine or been infected with RSV within 1 year prior to receiving the investigational vaccine.
• History or family history of epilepsy and mental illness.
• A family history of congenital or hereditary immunodeficiency, or a history and physical examination confirmed or suspected immunosuppression or immunodeficiency, or human immunodeficiency virus (HIV) infection, asplenia or functional asplenia.
• Have the following organ-specific or systemic autoimmune diseases: Guillain-Barre syndrome, myasthenia gravis, autoimmune hepatitis, ulcerative colitis, systemic lupus erythematosus, rheumatoid arthritis, Sjogren's syndrome, and systemic sclerosis.
• Allergic to any component of the study vaccine, or any previous history of severe allergy to vaccine vaccination, such as anaphylactic shock, allergic laryngeal edema, anaphylactoid purpura, thrombocytopenic purpura, local allergic necrosis reaction, angioneurotic edema, etc.
• Severe chronic disease or active chronic disease, as assessed by the investigator, including but not limited to myocardial infarction, severe arrhythmia, unstable angina, uncontrolled blood pressure after medication (systolic blood pressure ≥140 mmHg and/or diastolic blood pressure ≥90 mmHg in subjects \< 60 years of age; Hypertensive disease with systolic blood pressure \> 160 mmHg and/or diastolic blood pressure \> 100 mmHg in subjects ≥60 years of age, diabetes mellitus with serious complications, cancer or precancerous lesions, and other serious cerebrovascular diseases, heart diseases, respiratory diseases, liver and kidney diseases, and thyroid diseases.
• Pregnant women (positive pregnancy test) or breastfeeding women, or those with pregnancy plans during the study period, or less than 6 weeks after the end of pregnancy (including ectopic pregnancy).
• Plan to donate eggs or sperm during the study.
• Unable to follow the trial procedures, or plan to relocate or stay away for a long period of time during the study and cannot complete the trial follow-up.
• Any medical condition that makes intramuscular injection unsafe due to other abnormalities, conditions that may obfuscate the results of the study, or conditions that are not in the best interest of the subject, is determined by the investigator to be unsuitable for clinical study.

Sponsors & Collaborators

• Sinocelltech Ltd.: lead

Study Sites (2)

Hebei Zhongshiyou Central Hospital

Langfang, Hebei, 965000, China

RECRUITING

Luzhou Center for Disease Control and Prevention

Luzhou, Sichuan, 646399, China

NOT YET RECRUITING

Study Officials

• Zhao Kexin, Doctor

  Hebei Zhongshiyou Central Hospital

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Yang Xinjie, Doctor

CONTACT

86+010-58628288; xinjie_yang@sinocelltech.com

Study Design

• Study Type: interventional
• Phase: phase 1
• Allocation: RANDOMIZED
• Masking: QUADRUPLE
• Who Masked: PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: December 23, 2024
• First Posted: January 1, 2025
• Study Start: February 6, 2025
• Primary Completion (Estimated): July 30, 2027
• Study Completion (Estimated): July 30, 2027
• Last Updated: February 13, 2025

Record last verified: 2024-12

Data Sharing

• IPD Sharing: Will not share

Locations

CN (2)