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Antibiofilm properties of interfacially active lipase immobilized porous polycaprolactam prepared by LB technique
Veluchamy Prabhawathi, Thulasinathan Boobalan, Ponnurengan Malliappan Sivakumar,
Published in Public Library of Science
2014
PMID: 24798482
Volume: 9
   
Issue: 5
Abstract
Porous biomaterial is the preferred implant due to the interconnectivity of the pores. Chances of infection due to biofilm are also high in these biomaterials because of the presence of pores. Although biofilm in implants contributes to 80% of human infections [1], there are no commercially available natural therapeutics against it. In the current study, glutaraldehyde cross linked lipase was transferred onto a activated porous polycaprolactam surface using Langmuir-Blodgett deposition technique, and its thermostability, slimicidal, antibacterial, biocompatibility and surface properties were studied. There was a 20% increase in the activity of the covalently crosslinked lipase when compared to its free form. This immobilized surface was thermostable and retained activity and stability until 100°C. There was a 2 and 7 times reduction in carbohydrate and 9 and 5 times reduction in biofilm protein of Staphylococcus aureus and Escherichia coli respectively on lipase immobilized polycaprolactam (LIP) when compared to uncoated polycaprolactam (UP). The number of live bacterial colonies on LIP was four times less than on UP. Lipase acted on the cell wall of the bacteria leading to its death, which was confirmed from AFM, fluorescence microscopic images and amount of lactate dehydrogenase released. LIP allowed proliferation of more than 90% of 3T3 cells indicating that it was biocompatible. The fact that LIP exhibits antimicrobial property at the air-water interface to hydrophobic as well as hydrophilic bacteria along with lack of cytotoxicity makes it an ideal biomaterial for biofilm prevention in implants. © 2014 Prabhawathi et al.
About the journal
JournalPLoS ONE
PublisherPublic Library of Science
ISSN19326203
Open AccessYes
Concepts (51)
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    Bacterial protein
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    Carbohydrate
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    Glutaraldehyde
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    LACTAM DERIVATIVE
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    Lactate dehydrogenase
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    POLICAPRAM
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    TRIACYLGLYCEROL LIPASE
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    Unclassified drug
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    Caprolactam
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    Fungal protein
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    HYDROXYPROGESTERONE CAPROATE
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    Immobilized enzyme
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    TRIACYLGLYCEROL LIPASE
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    3t3 cell line
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    Antibiofilm activity
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    Antimicrobial activity
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    Article
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    Atomic force microscopy
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    BACTERIUM COLONY
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    Biocompatibility
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    Biofilm
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    Cell proliferation
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    Cell wall
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    Cross linking
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    Cytotoxicity
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    Enzyme activity
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    Enzyme immobilization
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    Enzyme stability
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    Escherichia coli
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    Fluorescence microscopy
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    Hydrophilicity
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    Hydrophobicity
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    Intermethod comparison
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    LANGMUIR BLODGETT FILM
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    Nonhuman
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    Porosity
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    SLIMICIDAL ACTIVITY
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    Staphylococcus aureus
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    Surface property
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    Thermostability
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    Candida
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    Chemistry
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    Drug effects
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    Enzymology
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    Human
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    Physiology
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    Biofilms
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    Enzymes, immobilized
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    Fungal proteins
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    Humans
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    Lipase