ENGLISH

Fas

By Nagata S.

Book information

Year
2000
DOI
10.1006/rwcy.2000.16004
Language
english
Format
PDF
Filesize
178 kB (182405 bytes)
Pages
8\8
Library
mexmat
Time added
2009-07-20 03:45:11

Description

Fas is a type I membrane protein belonging to the TNF/NGF receptor family, and is expressed in various tissues and cell lines. Binding of FasL or agonistic anti-Fas antibody to Fas causes apoptosis in Fas-bearing cells. That is, the Fas engagement recruits pro-caspase 8 through an adapter molecule called FADD. Oligomerization of pro-caspase 8 induces processing of pro-caspase 8 to active forms. The caspase 8 then activates other caspases in the downstream of the caspase cascade. These caspases then cleave various cellular substrates to cause morphological changes of the cells, and to degrade chromosomal DNA. The Fas-mediated apoptosis is involved to kill the activated T cells and В cells, thus down regulating the immune reaction. The loss-of-function mutations in Fas in human and mouse cause lymphoproliferation. and accelerate autoimmune diseases.

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