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Dose/time-dependent modulation of the endothelial function through induction agents: non-depleting versus depleting agents.

Abstract：

BACKGROUND:Polyclonal anti-thymocyte globulins (ATGs) and anti-CD25 antibodies are agents used for induction of immunosuppression in solid-organ transplantation. We aimed to investigate the effect of different regimens of these immunosuppressive induction agents on transendothelial migration of peripheral blood mononuclear cells (PBMC) and evaluated the endothelial apoptosis after treatment. METHODS:Human microvascular endothelial cells were either activated with tumor necrosis factor-α/interferon-γ or not and further treated with 25 or 125 μg/mL ATG (Thymoglobulin, Sanofi-Aventis, Germany) for 2 hours or 24 hours, or with 5 μg/mL Basiliximab (Simulect, Novartis, Germany) for 2 hours or 24 hours. PBMC were either activated with phytohaemagglutinin (PHA) or not and further treated with 25 or 125 μg/mL ATG or with 5 μg/mL Basiliximab for 2 h and then used for transendothelial migration assays. Apoptosis of endothelial cells was detected by means of Annexin-V staining after 2-hour incubation with either 25 or 125 μg/mL ATG or 5 μg/mL Basiliximab. RESULTS:Prophylactic 24-hour administration of ATG to naive endothelial cells without PBMC treatment reduced transendothelial migration. Prophylactic 24-hour administration of ATG and Basiliximab to naive endothelial cells after PBMC treatment with the same agents reduced the transendothelial migration after 24 hours. In both cases, no effect could be observed after 2-hour treatment. Basiliximab but not ATG showed a reduction of transmigration after 2-hour treatment of PBMCs without naive EC treatment. Apoptosis of endothelial cells after treatment increased in both cases, being in case of ATG dose-dependent, increasing from 1.2% after either 25 μg/mL ATG to 8.7% after 125 μg/mL ATG. CONCLUSIONS:Immunosuppressive induction agents modulate the endothelial activity in a dose- and time-dependent manner. Our results suggest that administration of induction agents over longer time periods could provide a potential benefit regarding endothelial immunomodulation. Increased doses may, however, show a deleterious effect on endothelial survival.

journal_name

Transplant Proc

journal_title

Transplantation proceedings

authors

Werner I,Bogert NV,Stock UA,Moritz A,Beiras-Fernandez A

doi

10.1016/j.transproceed.2014.06.055

subject

Has Abstract

pub_date

2014-11-01 00:00:00

pages

2953-6

issue

9

eissn

0041-1345

issn

1873-2623

pii

S0041-1345(14)00494-1

journal_volume

46

pub_type

杂志文章

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