Related Experiment Video
Updated: Aug 23, 2025
Polymalic Acid-based Nano Biopolymers for Targeting of Multiple Tumor Markers: An Opportunity for Personalized Medicine?
Published on: June 13, 2014
Synthesis of Polylactic Acid Oligomers for Broad-Spectrum Antimicrobials
Qi Bao1,2, Ziheng Zhang1,2, Baocheng Yu3,4
1Research Institute for Intelligent Wearable Systems, The Hong Kong Polytechnic University, Hong Kong 999077, China.
Abstract:
Infectious microbial diseases are a major public health hazard, calling for more innovative antimicrobials. Herein, polylactic acid (PLA) oligomers have been explored and reported as a bio-safe and eco-friendly functional antimicrobial agent against pathogens, such as viruses (H1N1, H3N2, and SARS-CoV-2), bacteria (E. coli, S. aureus, K. pneumoniae, MRSA), and fungi (C. albicans). The PLA oligomers were prepared by direct catalyst-free condensation polymerization of l-lactic acid monomers and characterized by FT-IR and 1H-NMR. The antiviral results demonstrate that PLA oligomers possess robust (inhibiting rate > 99%) and rapid (<20 min) antiviral activity against two pandemic ssRNA viruses, including influenza A virus (IAV) and coronavirus (CoV). Furthermore, the PLA oligomers exhibit high antibacterial activities against both Gram negative (G−) and Gram positive (G+) bacteria. The PLA oligomers also perform efficiently in killing a large amount of C. albicans as high as 105 cfu/mL down to zero at the concentration of 10 mg/mL. Thus, the broad-spectrum antimicrobial activity endowed the PLA oligomers with a promising biocidal option, except antibiotics in a wide range of applications, such as medical textiles, food preservation, water disinfection, and personal hygiene, in light of their unique biodegradability and biocompatibility.
Insights
Polylactic acid (PLA) oligomers show potent antimicrobial activity against viruses, bacteria, and fungi. These eco-friendly agents offer a promising alternative to antibiotics for various applications due to their biodegradability and biocompatibility.
Area of Science:
- Materials Science
- Biotechnology
- Public Health
Background:
- Infectious diseases pose a significant public health threat, necessitating novel antimicrobial agents.
- Existing antimicrobials face challenges like resistance and environmental impact.
Purpose of the Study:
- To explore polylactic acid (PLA) oligomers as a safe, eco-friendly antimicrobial agent.
- To evaluate the efficacy of PLA oligomers against a broad spectrum of pathogens.
Main Methods:
- PLA oligomers synthesized via catalyst-free condensation polymerization of l-lactic acid.
- Characterization using FT-IR and 1H-NMR spectroscopy.
- Antimicrobial efficacy tested against viruses (H1N1, H3N2, SARS-CoV-2), bacteria (E. coli, S. aureus, K. pneumoniae, MRSA), and fungi (C. albicans).
Main Results:
- PLA oligomers demonstrated rapid (>99% inhibition in <20 min) antiviral activity against influenza A virus and coronavirus.
- Effective broad-spectrum antibacterial activity against Gram-negative and Gram-positive bacteria.
- Efficiently eradicated Candida albicans at a concentration of 10 mg/mL.
Conclusions:
- PLA oligomers exhibit broad-spectrum antimicrobial properties, including antiviral, antibacterial, and antifungal capabilities.
- Their biodegradability and biocompatibility make them a promising alternative to traditional antibiotics.
- Potential applications include medical textiles, food preservation, water disinfection, and personal hygiene products.
Related Concept Videos
01:19Formation of Lipopolysaccharides
01:20Anionic Chain-Growth Polymerization: Overview
01:03Step-Growth Polymerization: Overview
Many natural and synthetic polymers are produced by...