天生的免疫力.天生的免疫力. 皮肤脂肪细胞可以防止侵袭性黄金葡萄球菌 (Staphylococcus aureus) 皮肤感染
Ling-juan Zhang1, Christian F Guerrero-Juarez2, Tissa Hata1
1Division of Dermatology, University of California, San Diego (UCSD), La Jolla, CA 92093, USA.
概括
皮肤脂肪细胞 (脂肪细胞) 通过产生抗微生物来积极抗击金黄色葡萄球菌感染. 脂肪细胞发育受损增加了感染的严重程度,突出显示了脂肪细胞.
科学领域:
- 免疫学 免疫学 免疫学
- 皮肤病学 皮肤病学
- 细胞生物学 细胞生物学
背景情况:
- 脂肪细胞或脂肪细胞越来越多地被认为是它们的免疫功能.
- 脂肪细胞在对抗细菌感染的皮肤宿主防御中的特定作用仍然在很大程度上未被定义.
- 黄金葡萄球菌皮肤感染是一个重大的临床挑战.
研究的目的:
- 调查脂肪细胞在宿主防御中对黄金葡萄球菌 (Staphylococcus aureus) 皮肤感染的作用.
- 阐明脂肪细胞有助于对抗黄金色杆菌的机制.
- 为了确定脂肪生成是否对于有效的皮肤免疫力至关重要.
主要方法:
- 在小鼠模型中诱导 Staphylococcus aureus 的皮肤感染.
- 在感染后对脂肪细胞增殖和皮肤脂肪层扩张的分析.
- 药理学和基因抑制脂肪生成 (例如,Zfp423(nur12) 小鼠,PPARγ 抑制剂).
- 在脂肪细胞中评估cathelicidin抗微生物的表达.
- 使用来自Camp的脂肪细胞的细菌生长抑制试验.
主要成果:
- 在S. aureus皮肤感染后,观察到预脂细胞的快速增殖和皮肤脂肪层的扩张.
- 脂肪生成受损导致S. aureus感染的易感性和严重性增加.
- 脂肪细胞介导的宿主防御依赖于cathelicidin抗微生物的产生.
- 抑制脂肪生成减少了cathelicidin的表达,缺乏cathelicidin的脂肪细胞失去了它们的细菌抑制能力.
结论:
- 脂肪细胞在对抗黄金葡萄球菌 (Staphylococcus aureus) 皮肤感染的宿主防御中发挥着至关重要的,以前未知的作用.
- 脂肪细胞产生的cathelicidin抗微生物是一种对抗S. aureus的关键机制.
- 脂肪生成对于有效的皮肤免疫力至关重要,突出了脂肪组织在感染控制中的新功能.
相关概念视频
Staphylococcal Skin Infections
110
Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
110
The Skin Microbiota
93
The human skin serves as a complex ecosystem inhabited by a diverse community of microorganisms, including bacteria, fungi, and viruses. This microbiome plays a critical role in maintaining skin health and defending against pathogenic invaders. The composition of microbial communities varies significantly across different regions of the body, influenced primarily by the local levels of moisture and sebum.Regional Variation in Skin MicrobiotaCutibacterium acnes predominantly colonizes sebaceous...
93
Defense Against Bacterial Pathogens
3.7K
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...
3.7K
Defense Mechanism Against Infection
11.7K
Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
11.7K
Introduction to Innate and Adaptive Immunity
13.3K
The human immune system is a complex defense mechanism that protects the body from harmful pathogens and foreign substances. It comprises two crucial components: innate and adaptive immunity.
Innate immunity is the body's natural, nonspecific defense system that acts quickly to protect against pathogens. It incorporates physical barriers like skin and mucous membranes and cellular elements such as phagocytes and natural killer cells. This part of our immune system provides an immediate,...
Innate immunity is the body's natural, nonspecific defense system that acts quickly to protect against pathogens. It incorporates physical barriers like skin and mucous membranes and cellular elements such as phagocytes and natural killer cells. This part of our immune system provides an immediate,...
13.3K
Surface Membrane Barriers
3.6K
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...
3.6K


