ε-Poly(L-lysine)-based Hydrogels with Fast-acting and Prolonged Antibacterial Activities



Bacterial infections and the associated morbidity and mortality due to bacterial pathogens in wounds and medical implants have been increasing as most of current coatings cannot fulfill all the requirements including excellent intrinsically antibacterial activity, low cytotoxicity, and favorable physical properties. Herein, we present a kind of antibacterial hydrogel based on ε-poly(L-lysine) (EPL) grafted carboxymethyl chitosan (CMC-g-EPL) as the inherently antibacterial matrix and the surplus EPL as highly efficient antimicrobial agent. Such hydrogels possess tunable swelling abilities with water absorption percentages of 800%-2000% and modulus varying from 10 kPa to 100 kPa, and exhibit two-stage excellent antibacterial behavior. First, the free EPL can be released from the hydrogel network for quick and highly efficient bacteria killing with 99.99% of efficacy; second, the grafted EPL endows hydrogel matrix with prolonged intrinsically antibacterial activity, especially when most of free EPL is released from the hydrogel. Overall, we provide a new insight for preparing highly effective antibacterial hydrogels.


Chitosan Poly(L-lysine) Hydrogel Self-assembly Antibacterial efficacy 


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This work was financially supported by the National Natural Science Foundation of China (No. 21674081), Shanghai International Scientific Collaboration Fund (No. 15230724500), Shanghai 1000 Talents Plan (No. SH01068), and the Fundamental Research Fund for the Central Universities (Nos. 22120180109 and 1500219107).

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10118_2018_2156_MOESM1_ESM.pdf (396 kb)
ε-Poly(L-lysine)-based Hydrogels with Fast-acting and Prolonged Antibacterial Activities


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Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Orthopedics, Shanghai Tenth People’s HospitalTongji University School of MedicineShanghaiChina
  2. 2.Department of Polymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Department Civil Engineering Materials of Ministry of EducationTongji UniversityShanghaiChina

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