The multifaceted granulysin.
نویسندگان
چکیده
Granulysin is a cytolytic and proinflammatory peptide contained in the cytotoxic granules of NK cells and CTL. Unexpectedly, granulysin also recruits and activates dendritic cells via TLR4/Myd88, playing the role of an immune adjuvant. Hence, in contrast to classical alarmins released by early leukocytes, granulysin is the first alarmin to be released from lymphocytes.
منابع مشابه
CD8 T cell-mediated killing of Cryptococcus neoformans requires granulysin and is dependent on CD4 T cells and IL-15.
Granulysin is located in the acidic granules of cytotoxic T cells. Although the purified protein has antimicrobial activity against a broad spectrum of microbial pathogens, direct evidence for granulysin-mediated cytotoxicity has heretofore been lacking. Studies were performed to examine the regulation and activity of granulysin expressed by CD8 T cells using Cryptococcus neoformans, which is o...
متن کاملGranulysin, a cytolytic molecule, is also a chemoattractant and proinflammatory activator.
Granulysin, a cationic protein produced by activated human CTL and NK cells, is cytolytic against microbial and tumor targets. In this study we show that granulysin also functions as a chemoattractant and activates monocytes to produce cytokines/chemokines. Although granulysin-mediated cytotoxicity occurs at micromolar concentrations, chemoattraction occurs in the nanomolar range, and immune ac...
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Granulysin, a 9-kDa protein localized in human cytolytic T lymphocytes and natural killer cell granules, is cytolytic against tumors and microbes but not against red blood cells. Synthetic peptides corresponding to the central region of granulysin recapitulate the lytic activity of the intact molecule, and some peptides cause hemolysis of red blood cells. Peptides in which cysteine residues wer...
متن کاملGranulysin crystal structure and a structure-derived lytic mechanism.
Our crystal structure of granulysin suggests a mechanism for lysis of bacterial membranes by granulysin, a 74-residue basic protein from human cytolytic T lymphocyte and natural killer cells. We determined the initial crystal structure of selenomethionyl granulysin by MAD phasing at 2A resolution. We present the structure model refined using native diffraction data to 0.96A resolution. The five...
متن کاملComparative Antimicrobial Activity of Granulysin against Bacterial Biothreat Agents
Granulysin is a cationic protein produced by human T cells and natural killer cells that can kill bacterial pathogens through disruption of microbial membrane integrity. Herein we demonstrate antimicrobial activity of the granulysin peptide derived from the active site against Bacillus anthracis, Yersinia pestis, Francisella tularensis, and Burkholderia mallei, and show pathogen-specific differ...
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عنوان ژورنال:
- Blood
دوره 116 18 شماره
صفحات -
تاریخ انتشار 2010