Gram-Positive Bacterial Ghosts via HCl Treatment
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Solution Overview
Problem
Current methods for preparing bacterial ghosts from gram-positive bacteria are costly, time-consuming, and often ineffective due to the need for complex molecular biological techniques, and there is a lack of research on using acidic environments for their production.
Innovation Solution
A method involving the treatment of gram-positive bacteria with hydrochloric acid at a minimum inhibitory concentration to form bacterial ghosts, which are effective as vaccines or antigen carriers for gram-positive bacterial infections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If E protein-mediated lysis or chemical treatment methods are used to prepare bacterial ghosts, then bacterial ghosts can be produced, but the process requires complex molecular biological techniques, high cost, and long manufacturing time
Solution Approach 1:
The patent replaces complex molecular biological techniques (genetic transformation, plasmid cloning, E protein expression) with a simple chemical treatment method using hydrochloric acid. This substitution dramatically simplifies the manufacturing process while maintaining effective bacterial ghost production, directly resolving the contradiction between production effectiveness and process complexity
Solution Approach 2:
The patent changes the chemical environment parameter from neutral/basic conditions (required for E protein-mediated lysis) to acidic conditions (pH 2.0-3.0 using HCl). This parameter change enables a fundamentally different mechanism of cell wall degradation that is simpler and more direct, eliminating the need for complex genetic manipulation while achieving reliable bacterial ghost formation
2Quantity of substance
If conventional chemical vaccines are used, then production cost is reduced, but immune induction is inhibited due to large amount of nonspecific cytoplasmic substances
Solution Approach 1:
The patent extracts and removes intracellular components (cytoplasmic substances, DNA, proteins) from the bacterial cell through controlled acid treatment, leaving only the empty cell envelope structure. This extraction process eliminates the nonspecific cytoplasmic substances that would otherwise inhibit immune induction, while maintaining the antigenic determinants on the cell surface for effective vaccine function
Solution Approach 2:
The patent creates a simplified copy of the whole bacterial cell - the cell envelope structure is preserved and maintained, while the internal contents are removed. This 'ghost' copy retains the essential antigenic features needed for immune stimulation without the harmful effects of complete bacterial components, achieving both low cost and high effectiveness
3Reliability
If live bacteria are used for vaccination, then immune induction is strong, but the bacteria can multiply and cause pathogenic effects
Solution Approach 1:
The patent converts the harmful acidic environment that kills bacteria into a beneficial processing condition. The hydrochloric acid treatment that would normally be considered harmful to bacterial viability is precisely what creates the bacterial ghost structure - it eliminates pathogenicity by destroying cellular functions while preserving the beneficial cell envelope structure for vaccination purposes
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 method effectively produces bacterial ghosts with preserved cell wall integrity and no intracellular proteins or DNA, reducing the risk of side effects and enabling their use as a vaccine or foreign antigen carrier for preventing or treating gram-positive bacterial infections.
Implementation Method 1
a step of treating the gram-positive bacteria obtained in the step of obtaining with hydrochloric acid to form bacterial ghosts
Data Source
AI summary
The present invention relates to bacterial ghosts, and more particularly, to a method of preparing bacterial ghosts from gram-positive bacteria by hydrochloric acid treatment. Specifically, according to the present invention, when gram-positive bacteria were cultured after being treated with a minimum inhibitory concentration (MIC) of hydrochloric acid capable of inhibiting colony formation of gram-positive bacteria, bacterial ghosts were effectively formed. Since the formed bacterial ghosts have no intracellular proteins or DNA while preserving cell wall integrity, the risk of side effects such as secondary infection caused by bacterial growth when the bacterial ghosts are administered to humans is low. Therefore, the bacterial ghosts prepared from gram-positive bacteria according to the method of the present invention may be effectively used as a vaccine or a foreign antigen carrier for preventing or treating gram-positive bacterial infection.