Abstract：
:Tumor angiogenesis and immune response have in common to be cell recognition mechanisms, which are based on specific adhesion molecules and dependent on nitric oxide (NO(•)). The aim of the present study is to deepen the mechanisms of angiogenesis and inflammation regulation by NO(•) to find out the molecular regulation processes that govern endothelial cell permeability and leukocyte transmigration. Effects of NO(•), either exogenous or produced in hypoxic conditions, were studied on microvascular endothelial cells from skin and lymph node because of their strong involvement in melanoma progression. We found that NO(•) down-regulation of pseudo-vessel formation was linked to a decrease in endothelial cell ability to adhere to each other which can be explain, in part, by the inhibition of PECAM-1/CD31 expression. On the other hand, NO(•) was shown to be able to decrease leukocyte adhesion on an endothelial monolayer, performed either in static or in rolling conditions, and to modulate differentially CD34, ICAM-1/CD54, ICAM-2/CD102 and VCAM-1/CD106 expression. In conclusion, during angiogenesis and leukocyte recruitment, NO(•) regulates cell interactions by controlling adhesion molecule expression and subsequently cell adhesion. Moreover, each endothelial cell type presents its own organospecific response to NO(•), reflecting the functions of the tissue they originate from.
journal_name
Exp Cell Resjournal_title
Experimental cell researchauthors
Carreau A,Kieda C,Grillon Cdoi
10.1016/j.yexcr.2010.08.011subject
Has Abstractpub_date
2011-01-01 00:00:00pages
29-41issue
1eissn
0014-4827issn
1090-2422pii
S0014-4827(10)00405-2journal_volume
317pub_type
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