Eosinophilic pneumonia pathophysiology: Difference between revisions
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{{Eosinophilic pneumonia}} | {{Eosinophilic pneumonia}} | ||
{{CMG}} {{AE}} [[Priyamvada Singh|Priyamvada Singh, M.D.]] [mailto:psingh13579@gmail.com] | |||
==Overview== | ==Overview== | ||
[[Eosinophil granulocyte|Eosinophils]] migrate to inflammatory sites in tissues in response to [[Chemokine|chemokines]] like CCL11, CCL24, CCL5,, and certain [[Leukotriene|leukotrienes]] like [[leukotriene B4]]. When [[Eosinophil granulocyte|eosinophils]] are activated, they release [[Eosinophilic|eosinophilic granules]]. Following activation, [[Eosinophil granulocyte|eosinophils]] effector functions include production of [[Reactive oxygen species|reactive oxygen products]] such as [[superoxide]] and [[peroxide]] produced by [[eosinophil peroxidase]], growth factors such as TGF beta and [[Cytokine|cytokines]] such as IL-1, IL-2, and [[Tumor necrosis factor-alpha|TNF alpha]]. | |||
== Pathophysiology == | == Pathophysiology == | ||
[[ | === Development of esopinophils === | ||
* [[Eosinophil granulocyte|Eosinophils]] differentiate from [[Myeloid|myeloid precursor cells]]. IL-5 controls the development of [[Eosinophil granulocyte|eosinophils]] in the [[bone marrow]]. | |||
* Prior to their exit from the [[bone marrow]], [[Eosinophil granulocyte|eosinophils]] produce many secondary granule proteins. | |||
* [[Eosinophil granulocyte|Eosinophils]] migrate to inflammatory sites in tissues in response to [[Chemokine|chemokines]] like CCL11, CCL24, CCL5, and certain leukotrienes like [[leukotriene B4]]. | |||
* When [[Eosinophil granulocyte|eosinophils]] are activated, they release [[Eosinophilic|eosinophilic granules]]. | |||
* Following activation, [[Eosinophil granulocyte|eosinophils]] effector functions include production of reactive oxygen products such as [[superoxide]] and [[peroxide]] produced by [[eosinophil peroxidase]], growth factors such as TGF beta and [[Cytokine|cytokines]] such as [[IL-1]], [[Interleukin 2|IL-2]], and [[Tumor necrosis factor-alpha|TNF alpha]]. | |||
* These products cause direct cytotoxicity, upregulation of chemoattraction, expression of adhesion molecules, regulation of [[vascular permeability]], and contraction of smooth muscle cells. | |||
* [[Eosinophil granulocyte|Eosinophils]] interact with [[Basophil granulocyte|basophils]], [[Endothelium|endothelial cells]], [[Macrophage|macrophages]], [[Platelet|platelets]], [[Fibroblast|fibroblasts]], and [[Mast cell|mast cells]] through cell membrane signaling molecules and receptors including Toll-like receptors and receptors for [[Cytokine|cytokines]], [[Antibody|immunoglobulins]], and [[complement]]. | |||
==References== | ==References== | ||
{{reflist|2}} | {{reflist|2}} | ||
[[Category:Pulmonology]] | [[Category:Pulmonology]] | ||
[[Category:Emergency medicine]] | [[Category:Emergency medicine]] | ||
{{WH}} | {{WH}} | ||
{{WS}} | {{WS}} | ||
Latest revision as of 19:46, 28 March 2018
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Eosinophilic pneumonia Microchapters |
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Eosinophilic pneumonia pathophysiology On the Web |
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American Roentgen Ray Society Images of Eosinophilic pneumonia pathophysiology |
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Risk calculators and risk factors for Eosinophilic pneumonia pathophysiology |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Priyamvada Singh, M.D. [2]
Overview
Eosinophils migrate to inflammatory sites in tissues in response to chemokines like CCL11, CCL24, CCL5,, and certain leukotrienes like leukotriene B4. When eosinophils are activated, they release eosinophilic granules. Following activation, eosinophils effector functions include production of reactive oxygen products such as superoxide and peroxide produced by eosinophil peroxidase, growth factors such as TGF beta and cytokines such as IL-1, IL-2, and TNF alpha.
Pathophysiology
Development of esopinophils
- Eosinophils differentiate from myeloid precursor cells. IL-5 controls the development of eosinophils in the bone marrow.
- Prior to their exit from the bone marrow, eosinophils produce many secondary granule proteins.
- Eosinophils migrate to inflammatory sites in tissues in response to chemokines like CCL11, CCL24, CCL5, and certain leukotrienes like leukotriene B4.
- When eosinophils are activated, they release eosinophilic granules.
- Following activation, eosinophils effector functions include production of reactive oxygen products such as superoxide and peroxide produced by eosinophil peroxidase, growth factors such as TGF beta and cytokines such as IL-1, IL-2, and TNF alpha.
- These products cause direct cytotoxicity, upregulation of chemoattraction, expression of adhesion molecules, regulation of vascular permeability, and contraction of smooth muscle cells.
- Eosinophils interact with basophils, endothelial cells, macrophages, platelets, fibroblasts, and mast cells through cell membrane signaling molecules and receptors including Toll-like receptors and receptors for cytokines, immunoglobulins, and complement.