Sialyllactose-Polymer Photosensitizer Complex for H. pylori Inactivation
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Solution Overview
Problem
Conventional antibiotic therapies for Helicobacter pylori infections face challenges due to increasing resistance, making it difficult to completely eradicate the bacteria.
Innovation Solution
A polymer composite comprising a photosensitizer, sialyllactose, and a water-soluble polymer is used for photodynamic therapy, selectively binding to Helicobacter pylori and generating singlet oxygen upon laser irradiation to inactivate the bacteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antibiotic therapy is used to treat Helicobacter pylori infection, then initial treatment effectiveness is achieved, but antibiotic resistance develops leading to treatment failure
Solution Approach 1:
The patent replaces the chemical mechanism of antibiotics with a photophysical mechanism. A photosensitizer compound is used that, upon illumination with light of a specific wavelength, generates reactive oxygen species that kill H. pylori bacteria. This substitution eliminates the selection pressure for antibiotic resistance while maintaining effective bacterial eradication.
Solution Approach 2:
The patent changes the fundamental parameter of treatment from chemical inhibition (antibiotics) to photo-induced oxidative destruction. By using a photosensitizer that absorbs light and transfers energy to oxygen, producing singlet oxygen and other reactive species, the treatment mechanism shifts to a physical-chemical process that does not induce resistance.
2Reliability
If traditional photosensitizers are used for photodynamic therapy, then bacterial inactivation is achieved, but cytotoxicity to host cells increases
Solution Approach 1:
The patent applies the principle of local quality by designing a photosensitizer with specific molecular characteristics (amino acid residue containing carboxyl group, specific absorption spectrum) that enable selective accumulation at the infection site and preferential interaction with bacterial components. The photosensitizer's structure is optimized to generate reactive oxygen species primarily where bacterial load is high, reducing off-target effects on host cells.
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 polymer composite effectively recognizes and inactivates Helicobacter pylori, overcoming antibiotic resistance and providing a novel approach for treatment and diagnosis, with excellent selectivity and binding power, and reduced cytotoxicity compared to traditional photosensitizers.
Implementation Method 1
the photosensitizer in the complex generates singlet oxygen when irradiated with laser to effectively induce the inactivation of Helicobacter pylori
Data Source
AI summary
The present invention relates to a polymer complex for recognizing Helicobacter pylori and its uses, and in more detail, a water-soluble polymer-photosensitizer complex in which sialyllactose, which selectively binds to the surface of Helicobacter pylori, is conjugated, has excellent selectivity and binding power to the Helicobacter pylori strain, and the photosensitizer in the complex generates singlet oxygen when irradiated with laser to effectively induce the inactivation of Helicobacter pylori and it is intended to provide the complex as a polymer complex for recognizing Helicobacter pylori to effectively detect Helicobacter pylori in the gastrointestinal tract and to provide a Helicobacter pylori photodynamic therapy to solve the conventional antibiotic resistance problem.