Abstract:
:Exposure of endothelial cells to recombinant tumor necrosis factor (TNF)-related apoptosis-inducing ligand (TRAIL) induced a modest (2-fold) increase of HL-60 cell adhesion as compared to TNF-alpha (40-fold) or interleukin 1beta (IL-1beta; 20-fold). However, pretreatment of endothelial cultures with TRAIL determined a significant reduction of the proadhesive activity induced by both TNF-alpha and IL-1beta. Unexpectedly, the antiadhesive activity of TRAIL was not due to interference with the nuclear factor kappaB (NF-kappaB)-mediated up-regulation of surface intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), and E-selectin adhesion molecules in response to inflammatory cytokines. In searching for the molecular mechanism underlying this biologic activity of TRAIL, a cDNA microarray analysis was performed. TRAIL pretreatment variably down-modulated the mRNA steady-state levels of several TNF-alpha-induced chemokines, and, in particular, it abrogated the TNF-alpha-mediated up-regulation of CCL8 and CXCL10. Of note, the addition of optimal concentrations of recombinant CCL8 plus CXCL10 to endothelial cultures completely restored the proadhesive activity of TNF-alpha. Moreover, experiments performed with agonistic anti-TRAIL receptor antibodies demonstrated that both TRAIL-R1 and TRAIL-R2 contributed, although at different levels, to TRAIL-induced chemokine modulation. Taken together, our data suggest that TRAIL might play an important role in modulating leukocyte/endothelial cell adhesion by selectively down-regulating CCL8 and CXCL10 chemokines.
journal_name
Bloodjournal_title
Bloodauthors
Secchiero P,Corallini F,di Iasio MG,Gonelli A,Barbarotto E,Zauli Gdoi
10.1182/blood-2004-10-4111subject
Has Abstractpub_date
2005-05-01 00:00:00pages
3413-9issue
9eissn
0006-4971issn
1528-0020pii
2004-10-4111journal_volume
105pub_type
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