Catsper VLP Contraceptive Vaccine Reversibility
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Solution Overview
Problem
Current long-acting reversible contraceptive technologies, such as hormonal methods and surgery, often have drawbacks including side effects, require discipline, and are not suitable for all individuals, necessitating a more effective, easy-to-use, and reversible contraceptive solution.
Innovation Solution
A contraceptive chimeric virus-like particle (VLP) is developed, incorporating antigenic carrier domains with capsid proteins from human papillomavirus and structural elements of the Catsper ion channel complex, administered to stimulate an immune response and produce anti-sperm antibodies, inhibiting sperm function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hormonal contraceptive methods are used, then contraceptive effectiveness is improved, but side effects and intolerance increase
Solution Approach 1:
The patent extracts and eliminates the harmful hormonal components from contraceptive methods while retaining the desired contraceptive effectiveness through a non-hormonal vaccine-based approach targeting sperm function
Solution Approach 2:
The patent replaces the biochemical hormonal mechanism with an immunological mechanism using virus-like particles and antigens to achieve contraceptive effect, substituting one biological system with another that avoids the harmful side effects of hormones
2Duration of action of moving object
If implanted or intrauterine devices are used, then long-acting contraceptive effect is improved, but device complexity and surgical intervention increase
Solution Approach 1:
The patent removes the physical device component entirely, replacing it with a biological vaccine that provides long-acting contraceptive effect through immune system activation without requiring implants or surgical devices
Solution Approach 2:
The vaccine leverages the body's own immune system to provide prolonged contraceptive protection, eliminating the need for external devices that require implantation, removal, or clinical intervention
3Adaptability or versatility
If pills or patches are used, then reversible contraceptive effect is improved, but ease of operation deteriorates due to discipline requirements
Solution Approach 1:
The patent combines the advantages of long-acting protection with reversibility by using a vaccine that provides extended contraceptive effect through immune response while allowing fertility to return naturally when the immune response diminishes, eliminating the need for daily or periodic user action
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
The VLP provides contraceptive benefits equivalent to traditional methods without the need for hormones or surgery, with reversible effects possible through supplemental compositions, offering a simple and long-lasting solution.
Implementation Method 1
administered to stimulate an immune response and produce anti-sperm antibodies
Data Source
AI summary
A composition includes a contraceptive chimeric virus-like particle with an antigenic carrier domain and one or more antigenic regions from a sperm cell in the antigenic carrier domain, with the antigenic carrier domain including human papillomavirus L1 capsid protein and the antigenic regions including one or more structural elements of the Catsper ion channel complex. When administered to a patient, the contraceptive vaccine stimulates production of anti-sperm antibodies that, upon binding to a sperm cell, inhibit the sperm cell's motility and thus inhibit the ability of the sperm cell to fertilize an egg cell. The induced immunoinfertility of the composition can be reversed for brief or extended lengths of time by overdosing the patient with a reversal agent lacking the antigenic carrier domain but having a protein sequence substantially identical to that of the one or more antigenic regions to sequester the anti-sperm antibodies.