甲醛和PM2.5联合暴露对Balb/c小鼠过敏性哮喘模型脑组织的影响
发布时间:2021-01-24 23:13
流行病学研究表明哮喘与脑损伤之间存在联系,但毒理学研究尚未完全证实,特别是哮喘对脑组织是否存在影响。本研究首先建立Balb/c过敏性哮喘小鼠模型,通过测定小鼠脑组织氧化应激的水平,包括活性氧(ROS)、谷胱甘肽(GSH)和丙二醛(MDA),同时观察小鼠脑组织病理学变化和炎症反应相关指标的含量变化,包括核因子κB(NF-κB)、白介素-1β和白细胞介素-6,以此探讨过敏性哮喘对小鼠脑组织的影响。结果显示过敏性哮喘可以通过氧化应激反应对小鼠脑组织造成损伤。众所周知,环境污染物对疾病的影响不容忽视,但以往的研究大多集中在单一污染物上,忽略了混合污染物的影响。同时,在这项研究中,选择典型的室外空气污染物——PM2.5和典型的室内空气污染物——甲醛进行联合暴露,以此更接近真实的环境,并观察这两种典型污染物之间是否具有一定的协同作用。结果表明,暴露于甲醛和PM2.5会增加过敏性哮喘对小鼠脑组织造成的损伤,这可能是由氧化应激和活化的NF-κB介导,从而促进炎性因子的释放导致炎症增强。
【文章来源】:华中师范大学湖北省 211工程院校 教育部直属院校
【文章页数】:53 页
【学位级别】:硕士
【文章目录】:
Abstract
摘要
1. Introduction
1.1 Asthma
1.1.1 Allergic asthma characterization
1.1.2 Asthma impact on brain function
1.2 Environmental pollutants
1.2.1 Outdoor air pollutants
1.2.3 Indoor air pollutants
1.3 PM2.5
1.3.1 PM2.5 characterization
1.3.2 PM2.5 impact on respiratory system and asthma
1.3.3 PM2.5 neurological effects
1.4 Formaldehyde
1.4.1 Formaldehyde background and exposure sources
1.4.2 Health effects of formaldehyde exposure
1.4.3 Formaldehyde neurotoxicity
1.5 Aims of the study
2. Materials and methods
2.1 Experimental animals
2.2 Preparation and components analysis of PM2.5
2.3 Exposure method
2.4 Brain coefficient and histological assay
2.5 Preparation of brain tissue homogenate
2.6 Detection of reactive oxygen species
2.7 GSH assay
2.8 Malondialdehyde measurement
2.9 Analysis of NF-κB and IL-1β
2.10 Analysis of IL-6
2.11 Statistical analysis
3. Results
3.1 PM2.5 components
3.2 Final weight and brain coefficient
3.3 Oxidative damage
3.4 Inflammation
3.5 Histopathological changes in the brain
4. Discussion
Conclusion
References
Acknowledgement
本文编号:2998105
【文章来源】:华中师范大学湖北省 211工程院校 教育部直属院校
【文章页数】:53 页
【学位级别】:硕士
【文章目录】:
Abstract
摘要
1. Introduction
1.1 Asthma
1.1.1 Allergic asthma characterization
1.1.2 Asthma impact on brain function
1.2 Environmental pollutants
1.2.1 Outdoor air pollutants
1.2.3 Indoor air pollutants
1.3 PM2.5
1.3.1 PM2.5 characterization
1.3.2 PM2.5 impact on respiratory system and asthma
1.3.3 PM2.5 neurological effects
1.4 Formaldehyde
1.4.1 Formaldehyde background and exposure sources
1.4.2 Health effects of formaldehyde exposure
1.4.3 Formaldehyde neurotoxicity
1.5 Aims of the study
2. Materials and methods
2.1 Experimental animals
2.2 Preparation and components analysis of PM2.5
2.3 Exposure method
2.4 Brain coefficient and histological assay
2.5 Preparation of brain tissue homogenate
2.6 Detection of reactive oxygen species
2.7 GSH assay
2.8 Malondialdehyde measurement
2.9 Analysis of NF-κB and IL-1β
2.10 Analysis of IL-6
2.11 Statistical analysis
3. Results
3.1 PM2.5 components
3.2 Final weight and brain coefficient
3.3 Oxidative damage
3.4 Inflammation
3.5 Histopathological changes in the brain
4. Discussion
Conclusion
References
Acknowledgement
本文编号:2998105
本文链接:https://www.wllwen.com/xiyixuelunwen/2998105.html