New kids in the block: the role of FasL and Fas in kidney damage.
Fas ligand (FasL) is a lethal cytokine that promotes apoptosis through cross- linking of the Fas receptor, although it also has other, less well understood functions. The FasL/Fas system regulates immune and inflammatory responses. Evidence that FasL and Fas participate in kidney damage can be summarized as follows: 1) FasL is expressed by renal cells and its expression increases during kidney damage; 2) activation of the Fas receptor promotes apoptosis of non-stimulated or cytokine-primed renal cells in culture; 3) Fas agonists kill mesangial cells and induce glomerular injury in vivo, but can also reduce kidney damage by limiting injurious immunological responses; 4) mice with disrupted FasL/Fas systems are protected from acute tubular cell injury, although they develop autoimmune glomerulonephritis if other genetic predisposing factors are present. These facts imply that the FasL/Fas system can be considered a new target for therapeutic intervention in kidney damage. However, any therapeutic approach must consider interference with Fas in other cell systems. The complexities of the FasL/Fas system in the kidney are still far from clear.[1]References
- New kids in the block: the role of FasL and Fas in kidney damage. Ortiz, A., Lorz, C., Egido, J. J. Nephrol. (1999) [Pubmed]
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