p(HGNC:SCAF11)
One checkpoint is that bacterial mRNA from live bacteria (also known as vita-PAMPs)44 activates NLRP3; the other checkpoint is that TLR4- and TRIF (TIR domain-containing adaptor protein inducing IFNβ)-dependent signalling — which is triggered by bacterial lipopolysaccharide (LPS) — mediate the secretion of type I IFNs, inducing pro-caspase 11 expression and activation by triggering the IFNα/β receptor (IFNAR) (FIG. 1). PubMed:23702978
Indeed, inflammasomes (which induce pyroptosis through caspase 1 or caspase 11 activation) and apoptosomes (which activate caspase 9 in response to cytochrome c release from mitochondria) are two mechanisms by which compromised cells are eliminated. PubMed:23702978
One checkpoint is that bacterial mRNA from live bacteria (also known as vita-PAMPs)44 activates NLRP3; the other checkpoint is that TLR4- and TRIF (TIR domain-containing adaptor protein inducing IFNβ)-dependent signalling — which is triggered by bacterial lipopolysaccharide (LPS) — mediate the secretion of type I IFNs, inducing pro-caspase 11 expression and activation by triggering the IFNα/β receptor (IFNAR) (FIG. 1). PubMed:23702978
Even if the expression of pro-caspase 11 could be induced independently of IFN signalling, caspase 11 activation in macrophages in response to Salmonella enterica subsp. enterica serovar Typhimurium infection is dependent on IFNAR1 as well as signal tranducer and activator of transcription 1 (STAT1)46. PubMed:23702978
Even if the expression of pro-caspase 11 could be induced independently of IFN signalling, caspase 11 activation in macrophages in response to Salmonella enterica subsp. enterica serovar Typhimurium infection is dependent on IFNAR1 as well as signal tranducer and activator of transcription 1 (STAT1)46. PubMed:23702978
Pyroptosis in response to live Gram-negative bacteria but not in response to other inflammasome triggers is entirely dependent on caspase 11, whereas caspase 1 is dispensable for this process41 PubMed:23702978
Indeed, inflammasomes (which induce pyroptosis through caspase 1 or caspase 11 activation) and apoptosomes (which activate caspase 9 in response to cytochrome c release from mitochondria) are two mechanisms by which compromised cells are eliminated. PubMed:23702978
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If you find BEL Commons useful in your work, please consider citing: Hoyt, C. T., Domingo-Fernández, D., & Hofmann-Apitius, M. (2018). BEL Commons: an environment for exploration and analysis of networks encoded in Biological Expression Language. Database, 2018(3), 1–11.