Bile Acid Composition for Pathogen Resistance
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Solution Overview
Problem
The challenge lies in identifying beneficial symbiotic bacteria specific to centenarians and developing methods to prevent or treat pathogenic bacterial infections, as the microbiota of centenarians contributes to longevity and health resilience but has not been fully elucidated.
Innovation Solution
The discovery of specific secondary bile acid-producing bacteria, such as Parabacteroides merdae, and enzymes like 3-oxo-5α-steroid-4-dehydrogenase (5AR) and 3β-hydroxysteroid dehydrogenase (3βHSDH), which produce antibacterial compounds like isoallo lithocholic acid, effective against gram-positive bacteria and have therapeutic effects on prostate cancer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beneficial symbiotic bacteria specific to centenarians are identified and used, then resistance to pathogenic bacterial infection and longevity are improved, but the complexity of identifying and characterizing specific bacterial strains and their metabolic pathways increases
Solution Approach 1:
The patent extracts and isolates specific beneficial bacteria (Parabacteroides merdae, Odoribacteraceae) and their key metabolic enzymes (5AR, 3βHSDH) from the complex centenarian microbiota. This extraction allows the identification of specific strains responsible for producing protective secondary bile acids without needing to analyze the entire microbial community, thus improving reliability while managing complexity.
Solution Approach 2:
The patent uses secondary bile acids (isoalloLCA, 3-oxoalloLCA) as intermediary substances that mediate the protective effect between the centenarian microbiota and pathogenic bacteria. These bile acids serve as measurable markers and active components that can be isolated and studied independently, simplifying the complex relationship between microbiota and disease resistance.
2Object-affected harmful factors
If specific secondary bile acid-producing bacteria and enzymes are utilized for producing antibacterial compounds, then antibacterial activity against gram-positive bacteria and therapeutic effects on prostate cancer are improved, but the complexity of producing and purifying these specific bile acid metabolites increases
Solution Approach 1:
The patent segments the complex bile acid metabolism pathway into distinct enzymatic steps catalyzed by specific enzymes (5AR converting 3-oxo-Δ4-LCA to 3-oxoalloLCA, and 3βHSDH converting 3-oxoalloLCA to isoalloLCA). This segmentation allows for targeted production and purification of individual bile acid metabolites, reducing the complexity of handling the entire mixture while maintaining high antibacterial activity.
Solution Approach 2:
The patent demonstrates that the identified bacteria and enzymes produce multiple bioactive secondary bile acids with universal antibacterial activity against various gram-positive pathogens and therapeutic effects on prostate cancer. This multi-functionality allows a single production system to address multiple health issues, reducing the need for separate production and purification processes for different compounds.
3Loss of information
If the biochemical synthetic pathway for producing secondary bile acids is elucidated, then the understanding of centenarian microbiota function and longevity mechanisms is improved, but the difficulty of detecting and measuring specific enzymatic activities and metabolic intermediates increases
Solution Approach 1:
The patent replaces complex microbiota community analysis with direct measurement of specific enzymatic activities (5AR and 3βHSDH) and their product concentrations. This substitution allows for simpler, more direct detection methods using biochemical assays to measure enzyme activity and metabolite levels, avoiding the need for complex metagenomic or metatranscriptomic analyses while maintaining comprehensive understanding of the metabolic pathway.
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 bacteria and enzymes reduce the risk of pathogenic infections and prostate cancer, contributing to longevity by producing antibacterial secondary bile acids and metabolizing testosterone, providing a composition for converting bile acids and using them as an antibacterial agent.
Implementation Method 1
a bacterium having a polynucleotide encoding 3-oxo-5α-steroid-4-dehydrogenase (5AR) as an active ingredient
Implementation Method 2
a bacterium having a polynucleotide encoding 3β-hydroxysteroid dehydrogenase (3βHSDH) as an active ingredient
Data Source
AI summary
The present inventors have found that the content ratios of isoalloLCA, 3-oxoLCA, alloLCA, and 3-oxoalloLCA in the feces of centenarians are higher than those of younger ones, and have also identified gut microbiomes peculiar to centenarians involved in the production of these bile acids. Furthermore, it has been found that these bile acids, enzymes involved in the production thereof, and bacteria producing the enzymes reduce the risk of infection with pathogens, prostate cancer, and the like, and are involved in longevity.