CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Mengya Li,Haofan Qu,Qin Li,Shengchang Lu,Yang Wu,Zuwu Tang,Xiaolong Liu,Zhanhui Yuan,Liulian Huang,Lihui Chen,Hui Wu
The irregularities resulting from burns and the discomfort associated with changing dressings during treatment remain challenging to provide effective wound therapy. Hydrogels typically lack the capacity to adhere to tissue and are unable to remain at the wound site for an adequate duration, or fail to detach from tissue when required. In this study, a carboxymethyl cellulose/chitosan-based hydrogel with robust tissue adhesion, self-healing and on-demand detachment was designed via a Schiff-base reaction for deep burn healing. The network structure is self-repairing and does not require external stimulation. The injectable hydrogel fragments undergo self-healing, forming a piece of hydrogel that adapts to the shape of the wound and completely fills the scald wound. The Schiff-base reaction in the hydrogel is formed by the aldehyde group of dialdehyde-modified carboxymethyl cellulose (DCMC) and the amino group of dopamine modified carboxymethyl chitosan (CS-DA), which acts as a dynamic crosslink and endows the hydrogel with self-healing capability and on-demand detachment from tissues by using a benign amino acid solution. Additionally, the incorporation of dopamine has been demonstrated to augment the adhesive properties of the hydrogel. Cytotoxicity assays revealed that the hydrogels exhibit favourable biocompatibility. This research offers a promising approach for the management of burn injuries and represents a significant advancement in the development of cellulose/chitosan hydrogels for biomedical applications.
研究领域:
生物材料学
·
医学
·
再生医学
✓ 已验证
产品关联
DOI
高影响因子
BURNS
·
2024
·
IF 3.2
Ning Liu,Baoxia Xue,Wei Cheng,Yong Liu,Mei Niu,Yongzhen Yang,Shiping Yu,Li Zhang
Dressings play a crucial role in the management of burn wound. In this study, the cotton bandage was modified with the Poly (N-isopropylacrylamide) / graphite oxide/nano silver (PNIPAM/GO-Ag) hydrogel to obtain a novel dressing (PNIPAM/GO-Ag/COT). The healing effect of the PNIPAM/GO-Ag/COT dressing on deep second-degree burn wounds in rats and the changes of related inflammatory factors were explored and analyzed systematically. The deep second-degree burn model was established by the steam scald method in Sprague–Dawley (SD) rats. The granulation tissue, collagen deposition, the expressions of tumor necrosis factor-α (TNF-α), and basic fibroblast growth factor (bFGF) of the wound were evaluated by means of the HE staining, Masson staining, ELISA, and immunohistochemistry methods. The results showed that, compared with the blank group (rats without the dressing treatment), the PNIPAM/GO-Ag/COT dressing reduced the expression of TNF-α by approximately 18 % and promoted the bFGF expression in wound tissue. Compared to the control group (rats with the gauze treatment), the wound healing rate in the PNIPAM/GO-Ag/COT dressing group was 58 % on the 14th day, with an increase of 30 %. These results demonstrated that the PNIPAM/GO-Ag/COT dressing primarily promoted burn wound healing by reducing inflammatory reactions, promoting collagen deposition, and enhancing the expression of bFGF.
研究领域:
生物医学工程
·
伤口愈合
·
材料科学
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomaterials Advances
·
2024
·
IF 5.5
Danmeng Bai,Haoxin Cheng,Junmin Mei,Guangqi Tian,Qingqing Wang,Simin Yu,Jie Gao,Yanhua Zhong,Hongbo Xin,Xiaolei Wang
Burns are a significant public health issue worldwide, resulting in prolonged hospitalization, disfigurement, disability and, in severe cases, death. Among them, deep second-degree burns are often accompanied by bacterial infections, insufficient blood flow, excessive skin fibroblasts proliferation and collagen deposition, all of which contribute to poor wound healing and scarring following recovery. In this study, SNP/MCNs-SKN-chitosan-β-glycerophosphate hydrogel (MSSH), a hydrogel composed of a temperature-sensitive chitosan-β-glycerophosphate hydrogel matrix (CGH), mesoporous carbon nanospheres (MCNs), nitric oxide (NO) donor sodium nitroprusside (SNP) and anti-scarring substance shikonin (SKN), is intended for use as a biomedical material. In vitro tests have revealed that MSSH has broad-spectrum antibacterial abilities and releases NO in response to near-infrared (NIR) laser to promote angiogenesis. Notably, MSSH can inhibit excessive proliferation of fibroblasts and effectively reduce scarring caused by deep second-degree burns, as demonstrated by in vitro and in vivo tests.
研究领域:
生物医学工程
·
伤口愈合
·
材料科学
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SKIN RESEARCH AND TECHNOLOGY
·
2023
·Vol. 29
·期 2
·e13290
·
IF 2.2
Zhang Mingqi,Wang Le,Zheng Yuqiang,Li Na,He Wei,Wang Zhuoshi
Background and objectives Human epidermal cell sheet (human-ECS) is a feasible treatment option for wound injury. Traditionally, researchers often use murine 3T3 fibroblast cells as feeder layer to support human epidermal cell sheet grafts, thus increase risk to deliver animal-borne infection. To overcome the potential risks involved with xenotransplantation, we develop human foreskin fibroblast cell as feeder layer culture system and investigate the effects of human-ECS on second-degree burn wound healing in mini-pig in order to develop more effective and safer therapies to enhance wound healing in human. Materials and methods Human epidermal keratinocytes and fibroblasts were isolated from foreskin tissue and were co-cultured to manufacture human-ECS. The cell morphology was monitored with phase-contrast microscopy, the stem cell markers were assessed by flow cytometry, and by colony-forming efficiency (CFE) assay. The structure of human-ECS was observed by hematoxylin and eosin staining. Expression of cytokines in human-ECS was confirmed by enzyme-linked immunosorbent assay. Second-degree burn wounds were created on the dorsal of miniature pig to evaluate the effect of oil gauze, oil gauze combined with commercial epidermal growth factor (EGF) cream, and oil gauze combined with human-ECS. Wound healing rate, histological examination, and Masson staining were measured to observe the wound repair efficacy. Real-time PCR and Western blot were utilized to detect the expression level of EGF and interleukin 6 (IL-6). Results Stratified human-ECS with 6-7 layers of epidermal cells was successfully cultivated with human-derived feeder cells, in which epidermal cell highly expressed CD49f and CFE was 3% ± 0.45%. Application of human-ECS induced a higher wound healing rate than commerical EGF cream and oil gauze control. The expression of EGF in human-ECS group was higher than those in the other groups; however, the expression of IL-6 was significantly decreased at day 14 by human-ECS treatment group. Conclusions Human-derived feeder cells are suitable for cultivation of human-ECS, avoiding pathogen transmission. Human-ECS could enhance second-degree burn wound healing, and its promoting effect involved secreting a variety of cytokines to regulate tissue reparative process.
研究领域:
再生医学
·
组织工程
·
烧伤治疗
·
细胞培养
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 13
·2573-2588
·
IF 5.344
Jintian Chen,Hui Wang,Liling Mei,Bei Wang,Ying Huang,Guilan Quan,Chao Lu,Tingting Peng,Xin Pan,Chuanbin Wu
A deep partial thickness (DPT) burn injury refers to burn damage involving the epidermis and major dermis, whose prognosis depends greatly on wound management. Lack of effective management can lead to an elongated healing process and aggravated scar formation, which can severely disturb patients, both physically and mentally. A dressing with good water absorption and moderate mechanical properties is crucial for healing promotion, and the prevention of scar formation is highly desirable. In this project, a hyaluronic acid combined lyotropic liquid crystal based spray dressing (HLCSD) loaded with the anti-fibrotic drug pirfenidone (PFD) has been designed. HLCSD is expected to achieve the goals of both wound healing promotion and scar prophylaxis. Its water absorption capacity, mechanical properties, drug release behavior and phase transition are fully evaluated. HLCSD possesses low viscosity for spray administration and high levels of water absorption for exudate absorption. An in situ gel composed of self-assembled lattice nanostructures provides excellent mechanical protection to promote the healing process and steady PFD release to exert a scar prophylaxis effect. The benefit of HLCSD on the wound healing rate is verified in vivo. In the DPT burn wound model we established, HLCSD also exhibits excellent healing promotion effects, and PFD-loaded HLCSD shows scar prophylaxis effects and displays an ideal prognosis, with skin as smooth as healthy skin. The healing promotion of HLCSD is considered to be related to the alleviation of inflammation, with an obviously shortened inflammation phase, with contributions from water management, mechanical protection and anti-inflammation by HLCSD. The scar prophylaxis of PFD-loaded HLCSD is proven to be related to the regulation of collagen synthesis and degradation, involving key cytokines like TGF-β and MMP-1. Taken together, the PFD-loaded HLCSD with healing promotion and scar prophylaxis offers significant promise as a spray dressing for DPT burn injuries.
研究领域:
药剂学
·
生物医学工程
·
伤口愈合
·
烧伤治疗
·
药物递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMATERIALS
·
2024
·
IF 12.8
YuLing Yang,JiaNi Zhang,SiWen Wu,Yu Deng,ShiHan Wang,Li Xie,XiaoPeng Li,Li Yang
Mesenchymal stem cell (MSC)-based therapy is an effective strategy for regenerative therapy. However, safety and ease of use are still issues to be overcome in clinical applications. Exosomes are naturally derived nanoparticles containing bioactive molecules, which serve as ideal cell-free therapeutic modalities. However, issues such as delivery, long-term preservation and activity maintenance of exosomes are other problems that limit their application. In this study, we proposed the use of rapid freeze-dry-thaw macroporous hydrogels for the encapsulation of HucMSC-derived exosomes (HucMSC-Exos) combined with an antimicrobial peptide coating. This exosome-encapsulated hyaluronic acid macroporous hydrogel HD-DP7/Exo can achieve long-term storage and transport by lyophilization and can be rapidly redissolved for treatment. After comprehensively comparing the therapeutic effects of HucMSC-Exos and HucMSC-loaded hydrogels, we found that HucMSC-Exos could also effectively regulate fibroblasts, vascular endothelial cells, and macrophages and inhibit myofibroblast-mediated fibrosis, thus promoting tissue regeneration and inhibiting scar formation in a mouse model of deep second-degree burn infection healing. These properties of lyophilized storage and whole-process-repair make HD-DP7/Exo have potential application value and application prospects.
研究领域:
再生医学
·
组织工程
·
伤口愈合
·
纳米技术
·
生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）