TNF superfamily: a growing saga of kidney injury modulators.
Members of the TNF superfamily participate in kidney disease. Tumor necrosis factor (TNF) and Fas ligand regulate renal cell survival and inflammation, and therapeutic targeting improves the outcome of experimental renal injury. TNF-related apoptosis-inducing ligand (TRAIL and its potential decoy receptor osteoprotegerin are the two most upregulated death-related genes in human diabetic nephropathy. TRAIL activates NF-kappaB in tubular cells and promotes apoptosis in tubular cells and podocytes, especially in a high-glucose environment. By contrast, osteoprotegerin plays a protective role against TRAIL-induced apoptosis. Another family member, TNF-like weak inducer of apoptosis (TWEAK induces inflammation and tubular cell death or proliferation, depending on the microenvironment. While TNF only activates canonical NF-kappaB signaling, TWEAK promotes both canonical and noncanonical NF-kappaB activation in tubular cells, regulating different inflammatory responses. TWEAK promotes the secretion of MCP-1 and RANTES through NF-kappaB RelA-containing complexes and upregulates CCl21 and CCL19 expression through NF-kappaB inducing kinase (NIK-) dependent RelB/NF-kappaB2 complexes. In vivo TWEAK promotes postnephrectomy compensatory renal cell proliferation in a noninflammatory milieu. However, in the inflammatory milieu of acute kidney injury, TWEAK promotes tubular cell death and inflammation. Therapeutic targeting of TNF superfamily cytokines, including multipronged approaches targeting several cytokines should be further explored.
Sanchez-Niño
Maria D
MD
IIS- Fundación Jiménez Díaz, 28040 Madrid, Spain.
Benito-Martin
Alberto
A
Gonçalves
Sara
S
Sanz
Ana B
AB
Ucero
Alvaro C
AC
Izquierdo
Maria C
MC
Ramos
Adrian M
AM
Berzal
Sergio
S
Selgas
Rafael
R
Ruiz-Ortega
Marta
M
Egido
Jesus
J
Ortiz
Alberto
A
D000818:Animals; D017209:Apoptosis; D049109:Cell Proliferation; D016207:Cytokines / Q000378:metabolism; D003929:Diabetic Neuropathies / Q000473:pathology; D053222:Fas Ligand Protein / Q000378:metabolism; D005786:Gene Expression Regulation; D006801:Humans; D007249:Inflammation; D007668:Kidney / Q000293:injuries*; D008954:Models, Biological; D053221:TNF-Related Apoptosis-Inducing Ligand / Q000378:metabolism; D048069:Tumor Necrosis Factors / Q000378:metabolism*
D016207:Cytokines; D053222:Fas Ligand Protein; D053221:TNF-Related Apoptosis-Inducing Ligand; D048069:Tumor Necrosis Factors