ABSTRACT
@#Objective To collaboratively calibrate and finally assign the potency of the 9th national standard for human rabies vaccine for candidate.Methods Qualified laboratories for the production,research and development of human rabies vaccines were organized to determine the potency of candidate national standard for rabies vaccines by using NIH method,with the 7th international standard for rabies vaccines(NIBSC code:16/204)as the reference standard. The detection results were statistically analyzed,and the geometric mean of effective detection values was taken as the final potency value of the candidate standard. According to the requirements of the preparation of national drug reference materials,the candidate standard was destroyed by heat acceleration,and then detected for the glycoprotein antigen to investigate the stability.Results A total of 20 laboratories participated in the collaborative calibration,of which the two laboratories that did not strictly follow the collaborative calibration SOP were excluded,and the data of the remaining collaborative laboratories were valid. After statistical analysis,the final potency of the 9th national standard for rabies vaccine was 11. 4 IU/mL,the 95% confidence limit was 10. 9～11. 9 IU/mL,and the 95% reference range of ED_(50) was 2. 10～2. 75. There was no significant difference in the results of glycoprotein antigen detection under different time conditions(2,4,8 and 16 weeks)at 37 ℃.Conclusion The collaborative calibration research of the 9th national standard for human rabies vaccine(batch number:201906001)has been completed,the potency assignment is scientific and rigorous,the data was reliable,and the thermal stability meets the requirements. At present,this standard has been approved by the National Drug Reference Material Committee,which is of great significance to the quality control of human rabies vaccine,especially the quality control of effectiveness.