Innate immunity : Phagocytosis process - NK cells
Автор: Microstudy (Microbiology lectures)
Загружено: 2024-06-22
Просмотров: 251
Описание:
Microstudy/Dr Ahmed Talaat
قناة متخصصه لشرح مادة الميكروبيولوجي والمناعة لجميع طلبة الكليات العملية
Cells of innate immunity :
(1) Phagocytes (Phagocytosis process)
Phagocytic cells include the following : Macrophages; neutrophils, dendritic cells
Phagocytosis is a multistep process whereby a phagocytic cell, like a neutrophil, recognizes the pathogen, ingests it, and then destroys the engulfed organism.
(2) NK cells
Natural killer (NK) cells are large, granular lymphocytes morphologically related to T cells, which make up 10–15% of blood leukocytes. NK cells contribute to innate immunity by providing protection against viruses and other intracellular pathogens. NK cells have the ability to recognize and kill virus-infected cells and tumor cells.
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