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Involvement of caspase 8 and c‐ FLIP L in the proangiogenic effects of the tumour necrosis factor‐related apoptosis‐inducing ligand ( TRAIL )
Author(s) -
Cantarella Giuseppina,
Di Benedetto Giulia,
Ribatti Domenico,
SaccaniJotti Gloria,
Bernardini Renato
Publication year - 2014
Publication title -
the febs journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.981
H-Index - 204
eISSN - 1742-4658
pISSN - 1742-464X
DOI - 10.1111/febs.12720
Subject(s) - angiogenesis , apoptosis , tumor necrosis factor alpha , umbilical vein , microbiology and biotechnology , in vivo , caspase 8 , cytokine , endothelial stem cell , chorioallantoic membrane , biology , caspase 3 , cancer research , chemistry , immunology , programmed cell death , in vitro , biochemistry
Tumour necrosis factor‐related apoptosis‐inducing ligand ( TRAIL ), a cytokine of the tumour necrosis factor superfamily, is a potent cell‐apoptosis inducer, although its effects vary as a function of concentration. In fact, low concentrations of TRAIL are associated with non‐apoptotic effects, such as cell proliferation. Here, the effects of TRAIL at different concentrations have been evaluated on mitogenesis and migration on human umbilical vein endothelial cells ( HUVEC ) in vitro , as well as in the chick embryo chorioallantoic membrane ( CAM ) angiogenesis model in vivo . At low concentrations, TRAIL promoted either mitogenesis or migration of HUVEC , evaluated using the wound healing method. Cleavage of caspase 8 was evaluated along with expression of the caspase 8 ‐like molecule, cellular FLICE ‐inhibitory protein (long form) (c‐ FLIP L ). Low concentrations of TRAIL failed to induce caspase 8 processing, whereas high concentrations induced apoptosis of HUVEC and activation of caspase 8 . Moreover, TRAIL induced a significant angiogenic response in the CAM assay in vivo , comparable with that of vascular endothelial growth factor. These data suggest that the non‐apoptotic effects of TRAIL include mitogenesis and increased mobility of endothelial cells, and eventually angiogenesis. In addition, the results demonstrate that the c‐ FLIP L level is also modulated by differences in TRAIL concentration, suggesting its involvement in the divergent effects of TRAIL . In conclusion, this study envisions a proangiogenic role of TRAIL , suggesting that TRAIL may represent a target for pharmacological manipulation.