Immune Complexes for Broadly Neutralizing Antibody Generation
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Solution Overview
Problem
Current vaccine development faces challenges in generating sufficiently immunogenic epitopes to elicit protective immune responses, particularly in providing broad and potent protection against pathogens like influenza viruses and tumors.
Innovation Solution
The development of immune complexes (ICs) that leverage Type II Fc receptor interactions and signaling by incorporating sialylated or asialylated IgG Fc regions, which bind to antigenic agents such as viral proteins or tumor antigens, to enhance the affinity and breadth of antibody responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vaccines containing killed microbes or microbial parts are used, then protective immune response is generated, but the immunogenicity and breadth of antibody response are insufficient
Solution Approach 1:
The patent employs immune complexes as composite structures combining antigenic agents with Fc region-containing proteins. These complexes integrate multiple functional components: the antigenic agent provides epitope recognition while the Fc region provides enhanced binding to Type II Fc receptors, creating a composite immunogen that elicits both protective and broad antibody responses
Solution Approach 2:
The patent modifies the Fc region of antibodies through sialylation or asialylation to alter its binding properties. By changing the glycosylation state of the Fc region, the immune complexes achieve enhanced binding affinity to Type II Fc receptors (such as CD23), which in turn enhances the immunogenicity and breadth of the antibody response
2Productivity
If traditional immunogens are administered, then humoral and cellular immune response is stimulated, but the affinity and potency of generated antibodies are limited
Solution Approach 1:
The Fc region-containing protein acts as an intermediary that bridges the antigenic agent and the Type II Fc receptors on immune cells. This intermediary enhances the interaction between the immunogen and the immune system, leading to improved antibody affinity through enhanced signaling and B cell activation
Solution Approach 2:
The immune complex combines the antigenic agent with the Fc region-containing protein to create a composite immunogen that leverages both the antigen-specific binding and the Fc-mediated enhancement of antibody affinity, producing high-affinity broadly neutralizing antibodies
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
These immune complexes trigger the upregulation of FcγRIIb on B cells, increasing the threshold for BCR affinity and selecting for higher affinity antibodies, thereby eliciting high-affinity, broadly neutralizing antibodies and providing enhanced protection against viral infections and tumors.
Implementation Method 1
The protein comprises an IgG Fc region and is capable of binding to a Type II Fc receptor
Data Source
AI summary
The present invention relates to immunogenic immune complexes, related compositions, and related methods.