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2016 ; 2016
(ä): 2174682
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Inhibition of Macrophage Migration Inhibitory Factor Protects against
Inflammation and Matrix Deposition in Kidney Tissues after Injury
#MMPMID27313397
Lu H
; Bai Y
; Wu L
; Hong W
; Liang Y
; Chen B
; Bai Y
Mediators Inflamm
2016[]; 2016
(ä): 2174682
PMID27313397
show ga
Background. Macrophage migration inhibitory factor (MIF) is an important
immunoregulatory cytokine involved in inflammation, which may be one important
reason resulting in matrix deposition in renal tissues after injury. However, the
underlying mechanisms have not yet been elucidated. Methods and Results. We
uncovered a crucial role of MIF in inflammation and collagen deposition in vivo
and in vitro. In rats, ureteral obstruction induced tubular injury, matrix
accumulation, and inflammatory cell infiltration. Additionally, enhanced MIF
levels in the obstructed kidneys were closely related to the increasing numbers
of CD68-positive macrophages. These obstruction-induced injuries can be relieved
by recanalization, consequently resulting in downregulated expression of MIF and
its receptor CD74. Similarly, ischemia reperfusion induced renal injury, and it
was accompanied by elevated MIF levels and macrophages infiltration. In cultured
tubular epithelial cells (TECs), aristolochic acid (AA) promoted matrix
production and increased MIF expression, as well as the release of
macrophage-related factors. Inhibition of MIF with an antagonist ISO-1 resulted
in the abolishment of these genotypes in AA-treated TECs. Conclusion. MIF plays
an important role in macrophage-related inflammation and matrix deposition in
kidney tissues following injury. MIF as a specific inhibitor may have therapeutic
potential for patients with inflammatory and fibrotic kidney diseases.