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2015 ; 6
(ä): 483
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CD74 in Kidney Disease
#MMPMID26441987
Valiņo-Rivas L
; Baeza-Bermejillo C
; Gonzalez-Lafuente L
; Sanz AB
; Ortiz A
; Sanchez-Niņo MD
Front Immunol
2015[]; 6
(ä): 483
PMID26441987
show ga
CD74 (invariant MHC class II) regulates protein trafficking and is a receptor for
macrophage migration inhibitory factor (MIF) and d-dopachrome tautomerase
(d-DT/MIF-2). CD74 expression is increased in tubular cells and/or glomerular
podocytes and parietal cells in human metabolic nephropathies, polycystic kidney
disease, graft rejection and kidney cancer and in experimental diabetic
nephropathy and glomerulonephritis. Stressors like abnormal metabolite (glucose,
lyso-Gb3) levels and inflammatory cytokines increase kidney cell CD74. MIF
activates CD74 to increase inflammatory cytokines in podocytes and tubular cells
and proliferation in glomerular parietal epithelial cells and cyst cells. MIF
overexpression promotes while MIF targeting protects from experimental glomerular
injury and kidney cysts, and interference with MIF/CD74 signaling or CD74
deficiency protected from crescentic glomerulonephritis. However, CD74 may
protect from interstitial kidney fibrosis. Furthermore, CD74 expression by
stressed kidney cells raises questions about the kidney safety of cancer therapy
strategies delivering lethal immunoconjugates to CD74-expressing cells. Thus,
understanding CD74 biology in kidney cells is relevant for kidney therapeutics.