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SuperBola Cationic Biocides with an Extended Bolaamphiphilic Structure: How Much Is Too Much?
Alina Y Muldagaliyeva1, Danielle E Talbot1, Elise L Bezold2
1Department of Chemistry and Biochemistry, Villanova University, Villanova, Pennsylvania 19085, United States.
ACS Infectious Diseases
|April 2, 2026
Summary
New bolaamphiphile structures show potent antibacterial activity against resistant strains. These compounds offer a promising alternative to traditional cationic biocides, overcoming existing bacterial resistance mechanisms.
Area of Science:
- Medicinal Chemistry
- Organic Chemistry
- Microbiology
Background:
- Cationic biocides are widely used disinfectants but face increasing bacterial resistance.
- Bolaamphiphiles, a class of biscationic compounds, show potential for potent antibacterial activity and reduced resistance.
- Systematic investigation of extended bolaamphiphilic linkers is lacking.
Purpose of the Study:
- To explore structure-activity relationships of novel "SuperBola" structures.
- To synthesize and evaluate bolaamphiphiles with hydrocarbon linkers of 12-18 carbons.
- To identify optimal amphiphilic balance for enhanced antibacterial efficacy.
Main Methods:
- Synthesis of 36 novel bolaamphiphile structures with ammonium, imidazolium, and aminopyridinum headgroups.
- Evaluation of antibacterial activity using minimum inhibitory concentration (MIC) values.
- Computational analysis (SwissADME) to determine optimal lipophilicity (cLogPo/w).
Main Results:
- Identification of a wide range of potent antibacterial compounds.
- Strong bioactivity (single-digit micromolar MICs) correlated with an ideal amphiphilic balance (cLogPo/w ≈ 5).
- Effective activity demonstrated against Gram-positive, Gram-negative, and resistant bacterial strains.
Conclusions:
- Novel bolaamphiphiles exhibit significant potential as next-generation antibacterial agents.
- Optimal amphiphilic balance is crucial for potent activity and overcoming resistance.
- These findings provide a foundation for developing new disinfectants to combat antimicrobial resistance.
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