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2018 ; 5
(ä): 52
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CD11b Activity Modulates Pathogenesis of Lupus Nephritis
#MMPMID29600248
Khan SQ
; Khan I
; Gupta V
Front Med (Lausanne)
2018[]; 5
(ä): 52
PMID29600248
show ga
Lupus nephritis (LN) is a common complication of systemic lupus erythematosus
(SLE) with unclear etiology and limited treatment options. Immune cell
infiltration into the kidneys, a hallmark of LN, triggers tissue damage and
proteinuria. CD11b, the ?-chain of integrin receptor CD11b/CD18 (also known as
?(M?2), Mac-1, and CR3), is highly expressed on the surface of innate immune
cells, including macrophages and neutrophils. Genetic variants in the human ITGAM
gene, which encodes for CD11b, are strongly associated with susceptibility to
SLE, LN, and other complications of SLE. CD11b modulates several key biological
functions in innate immune cells, including cell adhesion, migration, and
phagocytosis. CD11b also modulates other signaling pathways in these cells, such
as the Toll-like receptor signaling pathways, that mediate generation of type I
interferons, a key proinflammatory cytokine and circulating biomarker in SLE and
LN patients. However, how variants in ITGAM gene contribute to disease
pathogenesis has not been completely established. Here, we provide an overview of
CD11b modulated mechanisms and the functional consequences of the genetic
variants that can drive disease pathogenesis. We also present recent insights
from studies after pharmacological activation of CD11b. These studies offer novel
mechanisms for development of therapeutics for LN, SLE and other autoimmune
diseases.