Abstract
Two of the main challenges that multicellular organisms faced during evolution were to cope with invading microorganisms and eliminate and replace dying cells. Our innate immune system evolved to handle both tasks. Key aspects of innate immunity are the detection of invaders or tissue injury and the activation of inflammation that alarms the system through the action of cytokine and chemokine cascades. While inflammation is essential for host resistance to infections, it is detrimental when produced chronically or in excess and is linked to various diseases, most notably auto-immune diseases, auto-inflammatory disorders, cancer and septic shock. Essential regulators of inflammation are enzymes termed “the inflammatory caspases”. They are activated by cellular sensors of danger signals, the inflammasomes, and subsequently convert pro-inflammatory cytokines into their mature active forms. In addition, they regulate non-conventional protein secretion of alarmins and cytokines, glycolysis and lipid biogenesis, and the execution of an inflammatory form of cell death termed “pyroptosis”. By acting as key regulators of inflammation, energy metabolism and cell death, inflammatory caspases and inflammasomes exert profound influences on innate immunity and infectious and non-infectious inflammatory diseases.
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Abbreviations
- ICE:
-
Interleukin-1β Converting Enzyme
- IL-1:
-
Interleukin-1
- Asp:
-
Aspartic acid
- Ala:
-
Alanine
- Cys:
-
Cysteine
- His:
-
Histidine
- Gly:
-
Glycine
- Ser:
-
Serine
- Arg:
-
Arginine
- Glu:
-
Glutamic acid
- IGIF:
-
Interferon-γ-inducing factor
- ST2:
-
Interleukin 1 receptor-like 1
- TH1:
-
Type 1 helper T cells
- TH2:
-
Type 2 helper T cells
- TIM:
-
Triose-phosphate isomerase
- GAPDH:
-
Glyceraldehyde-3-phosphate dehydrogenase
- SREBP:
-
Sterol regulatory element binding protein
- iTRAQ:
-
Isobaric tag for relative and absolute quantitation
- FGF2:
-
Fibroblast growth factor 2
- Bid:
-
BH3-interacting domain death agonist
- AIP-1/WDR-1:
-
Atrophin-interacting-protein 1/WD repeat domain 1
- LD:
-
Lethal dose
- SIRS:
-
Systemic inflammatory response syndrome
- LPS:
-
Lipopolysaccaride
- TNFα:
-
Tumor necrosis factor α
- SAP:
-
Severe acute pancreatitis
- DSS:
-
Dextran sodium sulfate
- ARF:
-
Acute renal failure
- CTCL:
-
Cutaneous T-cell lymphoma
- VCAM-1:
-
Vascular cell adhesion molecule-1
- MS:
-
Multiple sclerosis
- EAE:
-
Autoimmune encephalomyelitis
- TLR:
-
Toll-like receptor
- NLR:
-
Nod-like receptor
- PAMP:
-
Pathogen-associated molecular pattern
- Nod:
-
Nucleotide binding and oligomerization domain
- NALP:
-
NACHT domain- leucine-rich repeat-, and PYD-containing protein
- ASC:
-
Apoptosis-associated speck-like protein containing a CARD
- Cardinal:
-
CARD inhibitor of NF-kB-activating ligands
- LRR:
-
Leucine-rich repeat
- CARD:
-
Caspase recruitment domain
- IPAF:
-
ICE protease-activating factor
- BIR:
-
Baculovirus IAP Repeat
- NAIP:
-
Neuronal apoptosis inhibitory protein
- PYD:
-
Pyrin domain
- NBS:
-
Nucleotide binding site
- DF:
-
Death-fold
- CIITA:
-
Class II trans-activator
- LCV:
-
Legionella containing vacuole
- Icm/Dot:
-
Intracellular multiplication/defective organelle trafficking
- Lgn :
-
Legionella
- IFN:
-
Interferon
- SipB:
-
Salmonella invasion protein B
- TTSS:
-
Type III secretion system
- IpaB:
-
Invasin B
- DAMP:
-
Danger-associated molecular pattern
- ATP:
-
Adenosine triphosphate
- iPLA2:
-
Ca2+-independent phospholipase A2
- MSU:
-
Monosodium urate
- CPPD:
-
Calcium pyrophosphate dihydrate
- ROS:
-
Reactive oxygen species
- NADPH:
-
Nicotinamide adenine dinucleotide phosphate-oxidase
- P22phox:
-
Protein 22 phagocyte and oxidase
- OVA:
-
Ovalbumin
- MDP:
-
Muramyl dipeptide
- HSP90:
-
Heat shock protein 90
- NF-κB:
-
Nuclear factor-kappa B
- COP:
-
CARD-only protein
- INCA:
-
Inhibitory CARD
- RIP2:
-
Receptor-interacting protein 2
- FMF:
-
Familial Mediterranean fever
- vPYD:
-
Viral PYD
- Bcl-2:
-
B-cell lymphoma 2
- Bcl-XL :
-
Basal cell lymphoma-extra large
- IKKβ:
-
I kappa B kinase β
- LOF:
-
Loss of function
- GOF:
-
Gain of function
- BLS-II:
-
Type II bare lymphocyte syndrome
- SCID:
-
Severe combined immunodeficiency
- MHC-II:
-
Major histocompatibility complex class II
- FCU:
-
Familial cold urticaria
- MWS:
-
Muckle–Wells syndrome
- NOMID:
-
Neonatal-onset mutli-system inflammatory disease
- CIAS1:
-
Cold-induced auto-inflammatory syndrome 1
- CD:
-
Crohn’s disease
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Christian R. McIntire and Garabet Yeretssian have contributed equally to this review.
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McIntire, C.R., Yeretssian, G. & Saleh, M. Inflammasomes in infection and inflammation. Apoptosis 14, 522–535 (2009). https://doi.org/10.1007/s10495-009-0312-3
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DOI: https://doi.org/10.1007/s10495-009-0312-3