What is NLRC4 Inflammasome?

NLRC4 EFFECTOR MECHANISMS. Activation of the NLRC4 inflammasome appears to activate several different host signaling events. NLRC4 was first identified as potential nucleotide binding protein that was capable of activating CASP1, the primary protease responsible for converting pro-IL-1β to active, secreted IL-1β2, 28.

What does NLRC4 stand for?

NLRC4 (NLR Family CARD Domain Containing 4) is a Protein Coding gene. Diseases associated with NLRC4 include Familial Cold Autoinflammatory Syndrome 4 and Autoinflammation With Infantile Enterocolitis.

What causes Pyroptosis?

Pyroptosis, which is also a form of regulated necrosis, is a lytic type of cell death inherently associated with inflammation. It is mediated by the catalytic activity of the hence-named “inflammatory caspases” that include caspase-1 and, under some circumstances, caspase-5 (and caspase-11 in rodents).

What activates NLRP3?

The NLRP3 inflammasome is activated by diverse stimuli, and multiple molecular and cellular events, including ionic flux, mitochondrial dysfunction, and the production of reactive oxygen species, and lysosomal damage have been shown to trigger its activation.

What is NLRC4 mutation?

When mutations cause the NLRC4 protein to always be active, it results in widespread activation of the immune system even when bacteria are not present. This uncontrolled activation causes damage to the patient’s healthy cells resulting in the symptoms of AIFEC.

What is NLRC4 GOF?

NLRC4 gain-of-function (GOF) mutations have been associated with early-onset recurrent fever, recurrent macrophagic activation syndrome and enterocolitis.

Where are inflammasomes found?

Inflammasomes are expressed primarily by myeloid cells and are located within the cell. The macromolecular inflammasome structure can be visualized by cryo-electron microscopy. This complex has been found to play a role in a variety of disease models in mice and several have been genetically linked to human diseases.

Does pyroptosis cause inflammation?

Pyroptosis, or caspase 1-dependent cell death, is inherently inflammatory, is triggered by various pathological stimuli, such as stroke, heart attack or cancer, and is crucial for controlling microbial infections.

What is the difference between pyroptosis and necrosis?

Pyroptosis is the primary response of the cell to infectious organisms and is triggered by the immune system. The main difference between pyroptosis and necroptosis is how it is activated: while the RIPK3 gene commonly activates necroptosis, pyroptosis is activated by the enzyme caspase-1.

What are NLRP3 inhibitors?

At present, to treat NLRP3-associated diseases, many drugs are available which block IL-1β such as neutralizing IL-1β antibody canakinumab, recombinant IL-1 receptor antagonist anakinra, and the soluble decoy IL-1 receptor rilonacept.