Immunostimulatory Plasmid Liposome Delivery for Fish Immunity
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Solution Overview
Problem
Current immunization methods for fish are inadequate in providing effective protection against infectious diseases, as they often require time to stimulate acquired immunity and may not offer immediate protection against pathogens such as viruses, bacteria, fungi, and parasites.
Innovation Solution
The use of immunostimulatory plasmids with a liposome delivery vehicle, which contain CpG motifs and non-CpG immunostimulatory motifs, to modulate the immune system of fish, enhancing both innate and acquired immune responses when administered with or without vaccines, thereby providing prophylactic and therapeutic immunity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional immunization methods are used for fish, then acquired immunity is stimulated, but protection is delayed and not immediate against pathogens
Solution Approach 1:
The immune response is segmented into two components: innate immunity activated immediately by CpG motifs and non-CpG immunostimulatory motifs, and acquired immunity activated subsequently by vaccine antigens. This segmentation allows immediate protection while maintaining long-term immunity development.
Solution Approach 2:
The plasmid composition performs preliminary action by activating the innate immune system before pathogen exposure or vaccine antigen presentation. The CpG and non-CpG motifs prepare the immune system in advance, creating a state of heightened readiness that provides immediate protection against pathogens.
2Speed
If immunostimulatory plasmids with CpG motifs are used, then rapid immune response is elicited, but the complexity of the composition increases
Solution Approach 1:
Multiple immunostimulatory elements (CpG motifs, non-CpG motifs, and vaccine antigens) are merged into a single plasmid composition delivered by liposomes. This consolidation achieves rapid immune activation without requiring separate administration of multiple components, thereby managing complexity while maintaining speed.
Solution Approach 2:
The plasmid composition serves multiple functions simultaneously: it acts as a delivery vehicle, contains immunostimulatory sequences (CpG and non-CpG motifs), and presents vaccine antigens. This multi-functionality achieves rapid and comprehensive immune activation through a single administered composition.
3Productivity
If liposome delivery vehicle is used to deliver plasmid, then delivery efficiency and immune response are improved, but manufacturing complexity increases
Solution Approach 1:
Liposomes serve as an intermediary delivery system that facilitates plasmid uptake by fish cells. The liposome-plasmid complex improves delivery efficiency by protecting the plasmid and enhancing cellular uptake, while the use of standard liposome formulations keeps manufacturing complexity manageable.
Data Source
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AI summary
The present invention generally relates to methods of eliciting an immune response in an aquatic species subject. In particular, an immunomodulator composition is used to induce an immune response to enhance the subject's ability to fight pathogens.