Related Experiment Video
Updated: Aug 7, 2026

Cationic Nanoemulsion-Encapsulated Retinoic Acid as an Adjuvant to Promote OVA-Specific Systemic and Mucosal Responses
Published on: February 23, 2024
Regulatory considerations on new adjuvants and delivery systems
1National Institute for Biological Standards and Control, Blanche Lane, South Mimms, Potters Bar, Hertfordshire EN6 3QG, UK. dsesardic@nibsc.ac.uk
New vaccine adjuvants and delivery systems require rigorous pre-clinical evaluation. Current regulatory guidelines for vaccine safety assessment are insufficient, necessitating case-by-case toxicological studies.
Area of Science:
- Vaccinology
- Toxicology
- Regulatory Science
Background:
- New vaccines and delivery systems are crucial for human disease prevention and treatment.
- Pre-clinical evaluation is essential for establishing biological properties, assessing public risk, and planning clinical trials.
- Vaccine pre-clinical studies inform optimal composition, formulation, and quality control tests.
Purpose of the Study:
- To highlight the importance of pre-clinical evaluation for novel vaccines and delivery systems.
- To address the challenges posed by new adjuvants and delivery systems for manufacturers and regulators.
- To emphasize the need for case-by-case toxicological assessments for adjuvants and adjuvant/vaccine combinations.
Main Methods:
- Review of current pre-clinical evaluation practices for vaccines.
- Analysis of regulatory requirements for vaccine safety assessment.
- Discussion of challenges in evaluating new adjuvants and delivery systems.
Main Results:
- Pre-clinical studies are vital for vaccine development, quality control, and regulatory approval.
- New adjuvants require specific safety evaluations due to their unique regulatory status.
- Existing regulatory guidelines for vaccine safety assessment are inadequate for novel components.
Conclusions:
- Enhanced pre-clinical and toxicological studies are needed for new vaccine adjuvants and delivery systems.
- Regulatory frameworks must evolve to address the complexities of modern vaccine development.
- Developing specific guidelines for adjuvant evaluation is critical for ensuring vaccine safety and efficacy.
More Related Videos
Related Concept Videos
Modified-Release Drug Delivery Systems: Influencing Factors
Modified-Release Drug Delivery Systems: Overview
Drug Regulation
Antigens Involved in Adaptive Immunity
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
Modified-Release Drug Delivery Systems: Classification
Pharmacovigilance
This process, termed pharmacovigilance, aims to detect, evaluate, and minimize harmful effects related to medication use. The data collection for pharmacovigilance depends on spontaneous reporting systems, where healthcare professionals or patients voluntarily report suspected ADRs.
In some cases, there...

