Anion-Paired Metallocene Compounds for MRSA Membrane Disruption

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Solution Overview

Problem

Current antimicrobial agents face challenges such as high toxicity, poor release profiles, and low targeting efficiency against bacterial pathogens, particularly multidrug-resistant Staphylococcus aureus, due to limitations in traditional antibiotics and cationic polymers, necessitating the development of new compounds with improved bioactivity and reduced toxicity.

Innovation Solution

Anion-paired cationic metallocene-containing compounds and polymers, where a cationic metallocene moiety is covalently connected to an organic functional group and paired with an anion, are synthesized to create antimicrobial agents that can effectively target and inhibit bacterial pathogens, including MRSA, by disrupting cell membranes and enhancing the activity of traditional antibiotics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional antibiotics are used to treat bacterial infections, then they can target specific bacterial mechanisms, but bacteria develop resistance and efficacy decreases

Engineering Contradiction:

Improveantimicrobial efficacyVSAvoidbacterial resistance

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

Instead of using anionic antibiotics that target bacterial cell wall synthesis (which bacteria have resisted), the invention inverts the approach by using cationic metallocene-containing compounds that target the bacterial cell membrane, a different and more fundamental target that bacteria have not developed resistance against

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The invention combines organometallic metallocene moieties with polymer frameworks to create composite cationic metallocene-containing compounds that exhibit both the stability of organometallic compounds and the antimicrobial activity of cationic polymers, providing enhanced efficacy against resistant bacteria

Inventive Principle:

Principle #40Composite materials

2Reliability

If cationic polymers are used as antimicrobial agents, then they can disrupt bacterial cell membranes, but they exhibit high toxicity

Engineering Contradiction:

Improveantimicrobial activityVSAvoidtoxicity

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention creates composite cationic metallocene-containing compounds that combine the membrane-disrupting capability of cationic polymers with the stability and potential reduced toxicity of organometallic metallocene structures, aiming to maintain antimicrobial activity while reducing harmful effects

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention modifies the chemical parameters of cationic polymers by incorporating metallocene moieties, changing the physical and chemical properties of the compound to reduce toxicity while preserving or enhancing antimicrobial activity against bacterial pathogens

Inventive Principle:

Principle #35Parameter changes

3Reliability

If conventional antibiotics are modified with polymers to improve antimicrobial activity, then efficacy against resistant bacteria improves, but the complexity of the compound increases

Engineering Contradiction:

Improveantimicrobial efficacyVSAvoidcompound complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention merges the antibiotic function with the structural stability of metallocene-containing polymers into a single integrated compound, eliminating the need for separate antibiotic-polymer conjugates and simplifying the overall therapeutic approach while maintaining enhanced efficacy

Inventive Principle:

Principle #5Merging (Combining)

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 compounds demonstrate significant antimicrobial activity against a broad spectrum of bacterial pathogens, including multidrug-resistant Staphylococcus aureus, with enhanced efficacy and reduced toxicity, effectively disrupting bacterial cell membranes and improving the performance of traditional antibiotics.

Implementation Method 1

considering the ability to disrupt the bacterial pathogen cytoplasmic membrane and low drug resistance from cationic polymers

Methodology Applied

Scientific EffectElectrostatic interaction: Electrostatics

Data Source

PatentUS9402394B2Anion-paired cationic metallocene-containing compounds and polymers as antimicrobial agents

Publication Date: 2016.08.02 UNIVERSITY OF SOUTH CAROLINA

AI summary

Anion-paired metallocene-containing compounds are generally provided, along with methods of making the same. In one embodiment, the anion-paired metallocene-containing compound includes a cationic metallocene moiety covalently connected to an organic functional group, and an anion paired to the cationic metallocene moiety. Generally, the cationic metallocene moiety comprises two cyclopentadienyl anions bound to a metal center in the oxidation state I.