释放氧化的多功能甲醇修饰的奇托桑/氧化德克斯水凝具有抗菌,抗氧化和益血管性质,用于MRSA感染的糖尿病伤口愈合
相关实验视频
Updated: May 18, 2026

06:55
Protocol to Create Chronic Wounds in Diabetic Mice
Published on: September 25, 2019
20.3K
Longhai Liu1, Jia Zheng1, Shaohua Li2
1Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China.
International journal of biological macromolecules
|February 18, 2024
概括
这项研究引入了一种用于糖尿病伤口愈合的新型水凝. 该材料具有强烈的抗菌,抗氧化和血管形成特性,在动物模型中显著改善了伤口修复.
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.
- 伤口愈合 治愈 伤口愈合
背景情况:
- 糖尿病伤口存在重大临床挑战,原因是愈合受损,感染风险增加和氧化应激.
- 开发具有多功能性质的先进伤口包裹对于有效的糖尿病伤口管理至关重要.
研究的目的:
- 开发和评估一种具有抗菌,抗氧化和益血管性质的新型甲醇修饰基托/氧化德克斯水凝 (CDP-PB),用于增强糖尿病伤口愈合.
主要方法:
- 合成甲基醇修饰的奇托 (Chi-Ca) 并与氧化德克斯 (Dex-CHO) 反应形成水凝.
- 纳入酸修饰聚乙烯胺 (PEI-PBA) 和多多巴胺纳米颗粒加载氧化捐赠体 (PDA@BNN6) 以通过光热疗法 (PTT) 增强抗菌作用.
- 在氧化应激下对抗菌活性,抗氧化能力和细胞反应 (迁移,增殖) 的体外评估.
- 在动物模型中进行体内评估,以消除伤口感染,血管新生,颗粒和原沉积.
主要成果:
- 该CDP-PB水凝证明了对MRSA的优良抗菌疗效 (99.9%的杀伤率),通过PDA@BNN6纳米颗粒的协同PEI-PBA和PTT增强.
- 水凝有效地清除自由基 (DPPH,OH,ABTS>85%) 并在氧化应激下促进细胞迁移和增殖.
- 动物研究证实了水凝能够清除伤口感染,促进血管形成,刺激颗粒组织和增加原沉积的能力.
结论:
- 多功能CDP-PB水凝具有显著的抗菌,抗氧化和益血管性能力.
- 这些特性共同有助于有效的糖尿病伤口愈合,通过解决感染,氧化应激和促进组织再生.
- CDP-PB水凝在治疗复杂的糖尿病伤口方面显示出有前途的临床应用潜力.
相关概念视频
Combined Effects of Drugs: Synergism
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
Masking and Demasking Agents
EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...
Surface Membrane Barriers
The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
The outer layer of the skin, the epidermis, is a robust barrier comprising layers of closely packed keratinized cells. This dense arrangement prevents microbes from penetrating the body. The periodic shedding of epidermal cells...
Chemical Agents for Microbial Control
Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
Mechanism of Antibiotic Resistance in MRSA
Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
Clinical Significance of Antibiotic Resistance
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...

