Is defibrotide's activity on leukocytes adenosine-receptor mediated? An "in vitro"--"ex vivo" appraisal.

Abstract:

:Defibrotide both "in vitro" and "ex vivo" decreases PMN adhesion to nylon columns. This activity is blunted by 8-phenyltheophylline, a known blocker of adenosine A1/A2 receptors, suggesting that Defibrotide acts on that kind of receptors. Indomethacin, a blocker of PGI2 synthesis, did not cancel DFT's activity, suggesting that PGI2 is not involved in DFT's activity, at least under our experimental conditions. Non-PMN leukocytes behaved differently "ex vivo" than PMNs. DFT's activity was not blunted by 8-phenyltheophylline, suggesting that DFT acts on this kind of cell through a different mechanism. The "in vitro" experiment did not confirm "ex vivo" studies suggesting that in the "in vitro" experiment "something" is missing that is present in "ex vivo" experiments.

journal_name

Thromb Res

journal_title

Thrombosis research

authors

Alberico P,Porta R,Pescador R,Ferro L

doi

10.1016/0049-3848(95)00178-t

subject

Has Abstract

pub_date

1995-11-15 00:00:00

pages

281-9

issue

4

eissn

0049-3848

issn

1879-2472

pii

0049-3848(95)00178-T

journal_volume

80

pub_type

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