PhaseⅠClinical Trial of 24-valent Pneumococcal Polysaccharide Conjugate Vaccine

Summary

In the treatment of pneumococcal diseases, the common use of penicillin-based antimicrobial agents has led to drug resistance, which has become a global challenge. Therefore, disease prevention through vaccination is essential. The 23-valent pneumococcal polysaccharide vaccine, the first widely used vaccine, has limitations. Subsequent pneumococcal polysaccharide conjugate vaccines have improved protection rates but increased cases of infections caused by non-vaccine serotype strains. Currently, vaccines available in China for pneumococcal disease prevention include the 23-valent polysaccharide vaccine (approved only for adults) and the 13-valent conjugate vaccine. PCV24 expands serotype coverage and converts capsular polysaccharides into T-cell-dependent antigens by binding them to proteins, stimulating humoral immunity and the complement system to generate specific antibodies and immunological memory for disease prevention. This study aims to preliminarily investigate the safety and immunogenicity of PCV24 vaccination in Chinese adults.

Conditions

• Streptococcus Pneumoniae Pneumonia

Interventions

BIOLOGICAL

low dose PCV24

The 24-valent pneumococcal polysaccharide conjugate vaccine (low-dose) developed by Shanghai Ruizhou Biotechnology Co., Ltd. and Changchun Ruizhou Biopharmaceutical Co., Ltd. is a liquid formulation. Each vial contains 0.5 ml, with a dosage of 0.5 ml per person per administration. The polysaccharide content of each serotype is as follows: * 3 serotypes (3, 6B, 12F): 4.0 μg per vial each * 21 other serotypes (1, 2, 4, 5, 6A, 7F, 8, 9N, 9V, 10A, 11A, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F, 33F): 2.0 μg per vial each After conjugation with carrier proteins, the polysaccharides of each serotype are adsorbed onto an aluminum phosphate adjuvant (aluminum content: 0.25 mg per dose).

BIOLOGICAL

high dose PCV24

The 24-valent pneumococcal polysaccharide conjugate vaccine (high-dose) developed by Shanghai Ruizhou Biotechnology Co., Ltd. and Changchun Ruizhou Biopharmaceutical Co., Ltd. is a liquid formulation. Each vial contains 0.5 ml, with a dosage of 0.5 ml per person per administration. The polysaccharide content of each serotype is as follows: 3 serotypes (3, 6B, 12F): 8.0 μg per vial each 21 other serotypes (1, 2, 4, 5, 6A, 7F, 8, 9N, 9V, 10A, 11A, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F, 33F): 4.0 μg per vial each After conjugation with carrier proteins, the polysaccharides of each serotype are adsorbed onto an aluminum phosphate adjuvant (aluminum content: 0.25 mg per dose).

BIOLOGICAL

PPV23

The 23-valent pneumococcal polysaccharide vaccine (PPV23) produced by Chengdu Institute of Biological Products is available in vials of 0.5 ml, with a dosage of 0.5 ml per person per administration. It contains the following pneumococcal polysaccharides for each serotype: Serotypes 1, 2, 3, 4, 5, 6B, 7F, 8, 9N, 9V, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F, and 33F: 25 μg per vial for each serotype. Additionally, it contains sodium chloride and water for injection.

BIOLOGICAL

Placebo

In addition to the antigen components, the 24-valent pneumococcal polysaccharide conjugate vaccine developed by Shanghai Ruizhou Biotechnology Co., Ltd. and Changchun Ruizhou Biopharmaceutical Co., Ltd. contains the following excipients: Aluminum phosphate adjuvant (aluminum content: 0.25 mg per dose) Sodium chloride Succinic acid Polysorbate 80 Water for injection It is a liquid formulation, available in vials of 0.5 ml, with a dosage of 0.5 ml per person per administration.

Sponsors & Collaborators

• Jiangsu Province Centers for Disease Control and Prevention

  lead NETWORK

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

TRIPLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2023-11-18

Primary Completion

2024-06-15

Completion

2024-07-30

Countries

• China

Study Locations