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The innate immune system or nonspecific immune system [1] is one of the two main immunity strategies in vertebrates (the other being the adaptive immune system). The innate immune system is an alternate defense strategy and is the dominant immune system response found in plants , fungi , prokaryotes , and invertebrates (see Beyond vertebrates ).
To make up for this lack of defense, plants use the pattern-triggered immunity (PTI) and effector-triggered immunity (ETI) pathways to combat trauma and pathogens. PTI is the first line of defense in plants and is triggered by PAMPs to initiate signaling throughout the plant that damage has occurred to a cell. Along with the PTI, DAMPs are also ...
Neutrophils contain neutrophil extracellular traps (NETs), composed of granule and nuclear constituents, which play a role in breaking up and killing bacteria that has invaded the immune system. NETs, composed of activated neutrophils, are fragile structures consisting of smooth stretches and globular domains, as shown via high-resolution ...
Neutrophil extracellular traps (NETs) are networks of extracellular fibers, primarily composed of DNA from neutrophils, which bind pathogens. [2] Neutrophils are the immune system's first line of defense against infection and have conventionally been thought to kill invading pathogens through two strategies: engulfment of microbes and secretion ...
Hypersensitive response (HR) is a mechanism used by plants to prevent the spread of infection by microbial pathogens.HR is characterized by the rapid death of cells in the local region surrounding an infection and it serves to restrict the growth and spread of pathogens to other parts of the plant.
The immune system is involved in many aspects of physiological regulation in the body. The immune system interacts intimately with other systems, such as the endocrine [83] [84] and the nervous [85] [86] [87] systems. The immune system also plays a crucial role in embryogenesis (development of the embryo), as well as in tissue repair and ...
Neutrophils express [32] and release cytokines, which in turn amplify inflammatory reactions by several other cell types. [citation needed] In addition to recruiting and activating other cells of the immune system, neutrophils play a key role in the front-line defense against invading pathogens, and contain a broad range of proteins. [33]
The neutrophils are at first attracted to a site, where they perform their function and die, before they or their neutrophil extracellular traps are phagocytized by the macrophages. [ 22 ] [ 23 ] When at the site, the first wave of neutrophils, after the process of aging and after the first 48 hours, stimulate the appearance of the macrophages ...