1. Objective and Necessity of R&D : Demand for Td vaccine for adults is increasing, having recently become subject to NIP. However, Korea relies on import vaccine bulk and final products with no manufacturers. DTP vaccine was introduced to Korea i...
1. Objective and Necessity of R&D : Demand for Td vaccine for adults is increasing, having recently become subject to NIP. However, Korea relies on import vaccine bulk and final products with no manufacturers. DTP vaccine was introduced to Korea in 1958 and adults over the age of 50 have not been vaccinated. Because additional vaccination has not been provided to children and adults, there has been a need to develop Td vaccine. Td vaccine acts as the base of multivalent compound vaccines such as Tdap and Tdap-IPV vaccines, and there is an urgent need to produce and commercialize Td vaccine within Korea. Development of Td vaccine was embarked to increase self-reliance of vaccine in Korea and to implement a national health safety network.
2. Description and Scope of R&D : In order to produce Td vaccine for adults, cell banks for diphtheria and tetanus strains, as well as systems for toxin production, toxin detoxification system, toxin and toxoid purification have been established. Based on these systems, large-scale toxin production systems and high-capacity detoxification and purification systems have been constructed based on fermenter culture. Furthermore, nonclinical test vaccines have been produced and nonclinical tests have been completed. IND documents, including stability test results of the phase-1 clinical vaccine, were submitted to the Korean Ministry of Food and Drug Safety, approval was obtained, and phase-1 clinical tests were conducted. Stability tests for the phase-3 vaccine are currently being conducted, and IND documents have been submitted to the Korean Ministry of Food and Drug Safety.
3. Results of R&D : Trial Td vaccine for adults is being produced based on a system constructed for producing diphtheria and tetanus toxins in fermenter, as well as detoxification process and purification process using column chromatography. Using the trial vaccine, nonclinical tests were performed. In the test results, toxicological changes were not observed. Furthermore, test results of gonadal functions did not indicate any deformity. In order to evaluate the safety and immunogenicity associated with the administration of vaccine (BR-TD-1001), phase-1 clinical trial has been completed with healthy male Korean adults. IND has been submitted to the Korean Ministry of Food and Drug Safety for conducting phase-3 clinical trial with healthy children and adults in Korea.
4. Plans for Application of R&D : There are plans to produce vaccine bulk and final products in our company using technology for mass production of diphtheria and tetanus toxoid bulk.