AIM2 Facilitates the Apoptotic DNA-induced Systemic Lupus Erythematosus via Arbitrating Macrophage Functional Maturation
Adult
Male
Mice, Inbred BALB C
0303 health sciences
Adolescent
Inflammasomes
Macrophages
Apoptosis
DNA
Macrophage Activation
Middle Aged
Lupus Nephritis
DNA-Binding Proteins
Mice
03 medical and health sciences
Antibodies, Antinuclear
Animals
Humans
Lupus Erythematosus, Systemic
Female
Melanoma
Cells, Cultured
DOI:
10.1007/s10875-013-9881-6
Publication Date:
2013-03-11T05:24:47Z
AUTHORS (6)
ABSTRACT
Lupus nephritis, a major cause of morbidity in patients with systemic lupus erythematosus (SLE), is generally thought to be induced by macrophage-mediated inflammation following deposition of various autoantibodies in kidneys. We previously reported that macrophage aberrant activation induced by activated lymphocyte-derived apoptotic DNA (apopDNA) have been found to play pathogenic roles in the immunodysregulation in lupus nephritis. However, DNA sensor(s) involved in apopDNA-induced macrophage activation and lupus nephritis remains largely undefined. Herein, we aimed to reveal the DNA sensor(s) involved in SLE disease.Correlation between the level of absent in melanoma 2 (AIM2), a cytoplasmic DNA receptor in the inflammasome pathway, and the clinical severity of SLE disease were analyzed in SLE patients as well as in lupus mice. Activated macrophages induced by apopDNA were analyzed by real-time PCR and western blot for AIM2 expression. After silencing of AIM2 via siRNA-mediated knockdown in vitro and in vivo, macrophage activation, inflammatory response, and SLE syndrome were assessed.AIM2 expression was closely correlated with the severity of disease in SLE patients and in lupus mice. Importantly, AIM2 expression was significantly increased in apopDNA-induced macrophages and closely correlated with macrophage activation. Knockdown of AIM2 significantly blunted apopDNA-induced macrophage activation. Furthermore, blockade of AIM2 expression notably ameliorated SLE syndrome via impeding macrophage activation and dampening inflammatory response in apopDNA-induced lupus mice.Our results implied that AIM2 might act as an important DNA sensor and a potential biomarker for apopDNA-induced macrophage functional maturation and SLE disease.
SUPPLEMENTAL MATERIAL
Coming soon ....
REFERENCES (53)
CITATIONS (120)
EXTERNAL LINKS
PlumX Metrics
RECOMMENDATIONS
FAIR ASSESSMENT
Coming soon ....
JUPYTER LAB
Coming soon ....