Abstract
In cultured endothelial cells, incubation with TNF-α (50 ng/ml) for 48 h markedly reduced viability of endothelial cells. A 6 h preincubation with Sper/NO (0.03- -1 μM) protected endothelial cells in a concentration-dependent manner and increased viability by 63% of control. The NO scavenger PTIO (30 μM) completely abolished cytoprotection by Sper/NO. A cytoprotective effect comparable to Sper/NO was observed when preincubating the cells with 8-bromo cyclic GMP (1-10 μM). Moreover, no protection by Sper/NO occurred in the presence of ODQ (0.1 μM), a selective inhibitor of soluble guanylyl cyclase. Our results demonstrate that NO produces a long-term endothelial protection against cellular injury by TNF-α, presumably via a cyclic GMP-dependent pathway.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 46-48 |
| Number of pages | 3 |
| Journal | FEBS Letters |
| Volume | 409 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jun 2 1997 |
Bibliographical note
Funding Information:This work was supported by the Deutsche Forschungsgemeinschaft (Schr 298/8-1). We would like to thank Martina Heidler for assistance in the preparation of this manuscript.
Keywords
- Cyclic GMP
- Cytoprotection
- Endothelial cell
- Nitric oxide
- Tumor necrosis factor-α
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