可注射的双交联聚 (?? 基) 乙烯基醇 (甲烯酸) 水凝灵感来自贝类粘附,用于皮肤伤口愈合和功能性组织再生
Gurpreet Kaur Randhawa1, Meghan Kostashuk1, Zhicheng Pan1,2
1Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario, L8S 4L8, Canada.
Advanced healthcare materials
|October 15, 2025
概括
由聚乙烯基醇 (POEGMA) 和多巴胺 (DA) 制成的新注射水凝为皮肤伤口关闭提供了一种无毒的替代方案. 这些先进的材料促进快速愈合和功能性皮肤再生,没有炎症或痕.
科学领域:
- 生物材料科学 生物材料科学
- 再生医学是一种再生医学.
- 聚合物化学 聚合物化学
背景情况:
- 传统的伤口关闭方法,如和是侵入性的,导致创伤,炎症和感染.
- 现有的组织粘合剂可能会引起不良反应,包括免疫反应,亡和去除时的痕.
- 需要先进的伤口关闭系统来促进再生并最大限度地减少并发症.
研究的目的:
- 制造可注射的聚乙烯基醇 (POEGMA) -多巴胺 (DA) 水凝,用于皮肤伤口关闭.
- 评估水凝的性能,包括凝时间,机械强度和组织粘附.
- 在临床前的伤口模型中评估水凝在促进皮肤再生和减少炎症方面的有效性.
主要方法:
- 使用双重交联 (水链接和多巴胺自我聚合) 来制造POEGMA-DA水凝.
- 水凝性质的表征:凝动力学,压缩模量和粘合强度.
- 在体内评估14天的小鼠皮肤伤口模型,以评估炎症和组织再生.
主要成果:
- 双交叉连接机制使快速凝 (24秒) 有高压缩模 (高达37kPa) 和粘合强度 (高达3.3kPa).
- 在小鼠伤口模型中,POEGMA-DA水凝没有显著的炎症和有效的组织粘附.
- 与未经治疗的伤口相比,观察到组织再生的显著改善,包括增强的原体重塑,3-5倍更高的毛囊再生,5-7倍更高的脂质腺再生和1.5-1.7倍更高的血管再生.
结论:
- 可注射的POEGMA-DA水凝是一种有希望的,无毒的伤口关闭系统.
- 水凝有效地促进皮肤功能再生,模仿本地组织环境.
- 这些先进的生物材料为急性表面皮肤伤口愈合的传统方法提供了优越的替代方案.
相关概念视频
The Extracellular Matrix
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.Composition of the Extracellular MatrixThe extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse molecules.
The Extracellular Matrix
Overview
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
In order to maintain tissue organization, many animal cells are surrounded by structural molecules that make up the extracellular matrix (ECM). Together, the molecules in the ECM maintain the structural integrity of tissue as well as the remarkable specific properties of certain tissues.
Composition of the Extracellular Matrix
The extracellular matrix (ECM) is commonly composed of ground substance, a gel-like fluid, fibrous components, and many structurally and functionally diverse...
Glycosaminoglycans
Glycosaminoglycans (GAGs), also known as mucopolysaccharides, are long and linear polymers comprising of specific repeating disaccharides - the amino sugar that can be N-acetylglucosamine or N-acetylgalactosamine, and a uronic acid that is usually glucuronic acid or iduronic acid.
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
Hyaluronic...
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
Hyaluronic...
Matrix Proteoglycans and Glycoproteins
Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
Anchoring Junctions
Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
Connective Tissue Fibers and Ground Substance
One of the significant functions of connective tissue is connecting tissues and organs. Unlike epithelial tissue that is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that are embedded within it. It plays a significant role in the functioning of this tissue. The major component of the matrix is a...


