Antibiotic Composition for Gastrointestinal Sample Decontamination
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Solution Overview
Problem
Gastrointestinal tract samples, particularly colorectal cancer samples, face challenges with bacterial contamination due to their proximity to gut microbiota, making existing decontamination methods ineffective and compromising the viability of cells needed for functional assays.
Innovation Solution
A composition comprising penicillin, streptomycin, gentamicin, ciprofloxacin, and vancomycin, along with a culture medium, is used to decontaminate gastrointestinal tract samples, maintaining cell viability and allowing for effective culture and evaluation of drug candidate efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional decontamination methods are used on gastrointestinal tract samples, then bacterial contamination is reduced, but cell viability is compromised
Solution Approach 1:
The decontamination process is divided into multiple sequential steps using different antibiotic formulations. First, a initial decontamination step removes surface contaminants, followed by a second step with a different antibiotic combination to eliminate remaining bacteria while progressively reducing antibiotic concentration to protect cell viability.
Solution Approach 2:
The antibiotic concentration is dynamically adjusted during the decontamination process. High concentrations are used initially to effectively kill bacteria, then gradually reduced in subsequent steps to minimize toxicity to tumor cells, thereby resolving the contradiction between contamination removal and cell survival.
2Productivity
If multiple antibiotics are combined to improve decontamination efficiency, then bacterial elimination is enhanced, but toxicity to viable cells increases
Solution Approach 1:
The antibiotic regimen is segmented into different combinations administered at different stages. Early steps use broader-spectrum combinations for rapid decontamination, while later steps use narrower-spectrum antibiotics at lower concentrations to finish eliminating resistant bacteria without excessive toxicity.
Solution Approach 2:
The potential harm of antibiotic toxicity is converted into benefit by using the antibiotics' selective toxicity against bacteria versus mammalian cells. By carefully controlling concentration and exposure time, the harmful effect on bacteria is maximized while the beneficial effect on cell survival is preserved.
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 described composition efficiently decontaminates gastrointestinal tract samples while keeping tumor cells viable, enabling reliable culture and assessment of drug efficacy, addressing the contamination issues and maintaining sample integrity.
Implementation Method 1
a composition comprising penicillin, streptomycin, gentamicin, ciprofloxacin, and vancomycin
Data Source
AI summary
In the field of gastrointestinal tract samples, in particular of gastrointestinal tract cancer samples, and their decontamination and cultivation. In particular, compositions including a mix of penicillin, streptomycin, gentamicin, ciprofloxacin and vancomycin, capable of efficiently decontaminating a gastrointestinal tract sample while maintaining cells viable. Also, methods using these compositions, for decontaminating a gastrointestinal tract sample, culturing a gastrointestinal tract sample, and evaluating the efficacy of drug candidates against a gastrointestinal tract cancer or tumor.