phagocyte

简明释义

英[ˈfæɡəsaɪt]美[ˈfæɡəsaɪt]

n. [生理学](吞)噬细胞；白血球

英英释义

单词用法

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例句

1.Objective For elucidating the effect of high dose selenium on phagocytic function of phagocyte in mice.

目的探讨高硒对小鼠吞噬细胞的影响。

2.Most of the cells are neutrophils, a type of phagocyte that normally circulates in the bloodstream.

大多数免疫细胞是嗜中性白细胞，一种通常在血液中循环的噬菌细胞。

3.Subsequently, the discovery of the colony-stimulating factors greatly improved understanding the regulation of phagocyte production.

随后，发现该细胞集落刺激因子大大提高了认识巨噬细胞的生产调节方式。

4.The heparin group showed significant improvement in lymphocyte transformation ratio and phagocytotic capacity of phagocyte, but the two groups had no significant difference on hemolytic plaque test.

结果发现：肝素组淋巴细胞转化率显著提高，吞噬细胞吞噬功能明显增强，而溶血空斑实验则两组无显著性差异。

5.Conclusion Injecting intraperitoneally IL-2 into mice can significantly strengthen mononuclear phagocyte phagocytosis.

结论腹腔注射IL - 2可以显著增强小鼠单核吞噬细胞的吞噬功能。

6.The heparin group showed significant improvement in lymphocyte transformation ratio and phagocytotic capacity of phagocyte, but the two groups had no significant difference on hemolytic plaque test.

结果发现：肝素组淋巴细胞转化率显著提高，吞噬细胞吞噬功能明显增强，而溶血空斑实验则两组无显著性差异。

7.Lymphatic and mononuclear phagocyte system is the body of the second line of defense.

淋巴和单核吞噬细胞系统是机体的第二道防线。

8.Destruction occurs in immune-mediated thrombocytopenia, in which platelets become coated with antiplatelet antibodies and are removed from the circulation by the fixed phagocyte system.

销毁发生在免疫介导的血小板减少，其中血小板被抗血小板抗体包被，并由吞噬细胞从循环系统中清除。

9.During an infection, the number of phagocytes in the bloodstream increases significantly.

在感染期间，血液中吞噬细胞的数量显著增加。

10.A phagocyte can recognize and destroy bacteria through a process called phagocytosis.

通过一种称为吞噬作用的过程，吞噬细胞可以识别并摧毁细菌。

11.Research shows that certain phagocytes can also present antigens to T cells.

研究表明，某些吞噬细胞还可以向T细胞呈递抗原。

12.Macrophages are a type of phagocyte that plays a crucial role in the immune response.

巨噬细胞是一种在免疫反应中发挥关键作用的吞噬细胞。

13.The immune system relies on the ability of a phagocyte to engulf pathogens.

免疫系统依赖于吞噬细胞吞噬病原体的能力。

作文

Phagocytes play a crucial role in the immune system, acting as the body's first line of defense against pathogens. These specialized cells are capable of engulfing and digesting foreign invaders such as bacteria, viruses, and even dead or dying cells. The term phagocyte refers to any cell that can perform this function, which is essential for maintaining health and preventing infections. There are two primary types of phagocytes: macrophages and neutrophils. Macrophages are large cells that reside in tissues and are known for their ability to consume a wide variety of pathogens. Neutrophils, on the other hand, are smaller and circulate in the bloodstream, quickly responding to sites of infection. When a pathogen enters the body, it triggers an immune response that attracts phagocytes to the area. These cells recognize the invaders through various receptors on their surface, which bind to specific markers found on pathogens. Once a phagocyte identifies a target, it surrounds the pathogen and engulfs it in a process called phagocytosis. This involves the extension of the cell membrane around the pathogen, forming a vesicle known as a phagosome. After the pathogen is enclosed, the phagosome fuses with lysosomes, which contain powerful digestive enzymes. These enzymes break down the pathogen into harmless components, allowing the phagocyte to either recycle useful materials or dispose of waste products. This process not only helps eliminate infections but also plays a vital role in activating other parts of the immune system. For instance, after digesting a pathogen, phagocytes can present pieces of the pathogen, known as antigens, on their surface. This action informs other immune cells, such as T cells, about the presence of the invader, leading to a more robust and targeted immune response.The importance of phagocytes extends beyond just fighting off infections. They are also involved in wound healing and tissue repair. When tissues are damaged, phagocytes migrate to the site of injury to clear away debris, dead cells, and pathogens, paving the way for new tissue growth. Their ability to communicate with other immune cells and release signaling molecules makes them key players in coordinating the overall immune response.However, the activity of phagocytes must be carefully regulated. Overactive phagocytes can lead to chronic inflammation and tissue damage, contributing to autoimmune diseases where the immune system mistakenly attacks the body’s own cells. Conversely, if phagocytes are underactive, the body becomes vulnerable to infections and diseases. Therefore, understanding the mechanisms that regulate phagocytes is essential for developing treatments for various conditions, including infections, inflammatory diseases, and cancer.In conclusion, phagocytes are vital components of the immune system, responsible for detecting and eliminating pathogens while also facilitating tissue repair. Their unique ability to engulf and digest foreign materials underscores their importance in maintaining health. By studying phagocytes, researchers can gain insights into how to enhance immune responses or mitigate harmful inflammation, ultimately leading to better health outcomes for individuals. As we continue to explore the complexities of the immune system, the role of phagocytes will undoubtedly remain a focal point in immunology research.

吞噬细胞在免疫系统中发挥着至关重要的作用，作为身体抵御病原体的第一道防线。这些特殊的细胞能够吞噬和消化外来入侵者，如细菌、病毒，甚至是死去或正在死亡的细胞。术语phagocyte指任何能够执行此功能的细胞，这对于维持健康和预防感染至关重要。主要有两种类型的phagocytes：巨噬细胞和中性粒细胞。巨噬细胞是大型细胞，驻留在组织中，以其能够吞噬各种病原体而闻名。中性粒细胞则较小，循环在血液中，快速响应感染部位。当病原体进入体内时，会触发免疫反应，吸引phagocytes到达该区域。这些细胞通过其表面上的各种受体识别入侵者，这些受体与病原体上特定的标记结合。一旦phagocyte识别到目标，它就会包围病原体并通过称为吞噬作用的过程将其吞噬。这涉及到细胞膜向外延伸，围绕病原体形成一个称为吞噬泡的囊泡。病原体被包裹后，吞噬泡与含有强大消化酶的溶酶体融合。这些酶将病原体分解为无害成分，使得phagocyte能够回收有用的材料或处理废物。这一过程不仅有助于消除感染，还在激活免疫系统其他部分中发挥着重要作用。例如，在消化病原体后，phagocytes可以在其表面展示病原体的一部分，称为抗原。这一行为通知其他免疫细胞，例如T细胞，关于入侵者的存在，从而导致更强大和针对性的免疫反应。phagocytes的重要性超越了仅仅对抗感染。它们还参与伤口愈合和组织修复。当组织受损时，phagocytes迁移到伤口部位，清除碎片、死细胞和病原体，为新组织的生长铺平道路。它们与其他免疫细胞的沟通能力以及释放信号分子的能力使它们成为协调整体免疫反应的关键角色。然而，phagocytes的活动必须得到仔细调节。过度活跃的phagocytes可能导致慢性炎症和组织损伤，促成自身免疫疾病，即免疫系统错误地攻击身体自身细胞。相反，如果phagocytes活性不足，身体就会变得容易受到感染和疾病的侵袭。因此，了解调节phagocytes机制的关键对于开发各种疾病的治疗方法至关重要，包括感染、炎症性疾病和癌症。总之，phagocytes是免疫系统的重要组成部分，负责检测和消除病原体，同时促进组织修复。它们独特的吞噬和消化外来物质的能力突显了它们在维持健康方面的重要性。通过研究phagocytes，研究人员可以深入了解如何增强免疫反应或减轻有害炎症，最终改善个体的健康结果。随着我们继续探索免疫系统的复杂性，phagocytes的角色无疑将继续成为免疫学研究的焦点。