Bilayer hydrogel dressing with lysozyme-enhanced photothermal therapy for biofilm eradication and accelerated chronic wound repair.
10.1016/j.apsb.2022.03.024
- Author:
Yizhen WANG
1
;
Qijun LV
1
;
You CHEN
2
;
Langtao XU
2
;
Miao FENG
2
;
Zhiyong XIONG
1
;
Jiajun LI
1
;
Jie REN
3
;
Jie LIU
2
;
Bo LIU
1
Author Information
1. Department of General Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China.
2. School of Biomedical Engineering, Sun Yat-sen University, Guangzhou 510006, China.
3. Department of Ultrasound, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China.
- Publication Type:Journal Article
- Keywords:
Antibacterial effect;
Bilayer hydrogel;
Biofilm eradication;
Chronic wound healing;
Lysozyme;
Nanoparticles;
Photothermal therapy;
Thermo-reversible gel–sol transition
- From:
Acta Pharmaceutica Sinica B
2023;13(1):284-297
- CountryChina
- Language:English
-
Abstract:
Biofilms are closely associated with the tough healing and dysfunctional inflammation of chronic wounds. Photothermal therapy (PTT) emerged as a suitable alternative which could destroy the structure of biofilms with local physical heat. However, the efficacy of PTT is limited because the excessive hyperthermia could damage surrounding tissues. Besides, the difficult reserve and delivery of photothermal agents makes PTT hard to eradicate biofilms as expectation. Herein, we present a GelMA-EGF/Gelatin-MPDA-LZM bilayer hydrogel dressing to perform lysozyme-enhanced PTT for biofilms eradication and a further acceleration to the repair of chronic wounds. Gelatin was used as inner layer hydrogel to reserve lysozyme (LZM) loaded mesoporous polydopamine (MPDA) (MPDA-LZM) nanoparticles, which could rapidly liquefy while temperature rising so as to achieve a bulk release of nanoparticles. MPDA-LZM nanoparticles serve as photothermal agents with antibacterial capability, could deeply penetrate and destroy biofilms. In addition, the outer layer hydrogel consisted of gelatin methacryloyl (GelMA) and epidermal growth factor (EGF) promoted wound healing and tissue regeneration. It displayed remarkable efficacy on alleviating infection and accelerating wound healing in vivo. Overall, the innovative therapeutic strategy we came up with has significant effect on biofilms eradication and shows promising application in promoting the repair of clinical chronic wounds.
