感染微环境触发的纳米颗粒通过热放大化学动力学疗法和M1巨细胞消除MRSA
Qimin Hong1, Wei Zhang1, Zhen Liu1
1Department of Bone and Joint Surgery, Department of Orthopedics, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200127, China.
Journal of nanobiotechnology
|July 31, 2024
概括
新型无抗生素纳米颗粒可以对抗MRSA感染. 这些纳米粒子利用化学动力学疗法,光热效应和免疫调节,对抗药物耐药细菌产生协同抗菌作用.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术纳米技术
- 传染性疾病 传染性疾病
背景情况:
- 抗生素耐药性是一个日益增长的全球健康威胁,需要替代治疗策略.
- 甲素耐药黄金葡萄球菌 (MRSA) 由于其对常规抗生素的耐药性而构成重大挑战.
研究的目的:
- 开发和评估用于对抗MRSA感染的新型无抗生素纳米颗粒.
- 研究化学动力学疗法 (CDT),光热疗法和免疫调节的协同抗菌作用.
主要方法:
- 用聚多巴胺 (PDA) 涂层和银 (Ag) 纳米粒子制造Fe3O4@PDA-Ag核心外纳米粒子.
- 利用细菌感染的酸性微环境,通过Fe3O4.4触发H2O2转化为活性氧物种 (ROS).
- 使用近红外光激活PDA的光热效应,增强ROS和Ag+释放以破坏细菌生物膜.
- 评估纳米颗粒对巨细胞两极分化的免疫调节作用 (M1).
主要成果:
- Fe3O4@PDA-Ag纳米颗粒显示出强大的抗菌活性对抗MRSA.
- CDT,光热效应和Ag+释放的协同作用有效地破坏了细菌生物膜.
- 纳米颗粒促进了M1巨细胞的两极分化,有助于间接的抗菌作用.
- 在体内研究证实了Fe3O4@PDA-Ag在控制MRSA感染方面的有效性.
结论:
- 开发的Fe3O4@PDA-Ag纳米颗粒提供了一个有前途的无抗生素治疗策略来对抗MRSA.
- 多模式协同作用的方法有效地准细菌感染,克服耐药性机制.
- 酸触发的纳米颗粒显示出治疗耐药细菌感染的潜力.
更多相关视频
09:01Magnetic-, Acoustic-, and Optical-Triple-Responsive Microbubbles for Magnetic Hyperthermia and Pothotothermal Combination Cancer Therapy
Published on: May 22, 2020
3.1K
05:57The Synergistic Effect of Visible Light and Gentamycin on Pseudomona aeruginosa Microorganisms
Published on: July 2, 2013
13.4K
相关概念视频
Defense Against Bacterial Pathogens
1.4K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.4K
The Tumor Microenvironment
6.6K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
6.6K
