Abstract
The nuclear enzyme poly(ADP-ribose) polymerse-1 (PARP-1) has previously been reported to play an important role in lipopolysaccharide (LPS)-induced pulmonary inflammation and is highly activated in COPD patients. In the present study, the anti-inflammatory efficacy of a previously identified poly(ADP-ribose) polymerase-1 (PARP-1) inhibiting caffeine metabolite, 1,7-dimethylxanthine, was both in vivo as well as ex vivo evaluated. Orally administered 1,7-dimethylxanthine significantly attenuated lung myeloperoxidase-levels, transcription of IL-6, TNF-alpha, MIP1alpha and MIP2 genes as well as PAR-polymer formation in a mouse model of intratracheally LPS-induced acute pulmonary inflammation. Serum amyloid P component and plasma IL-6 were also lowered in 1,7-dimethylxanthine treated mice, indicating a reduced systemic inflammatory response. In addition, at 24h after LPS administration anti-inflammatory effects of 1,7-dimethylxanthine appeared more pronounced than those of the orally administered PARP-1 inhibitor 3-aminobenzamide. In the second model, in blood of COPD-patients and healthy controls ex vivo pre-incubated with a physiological concentration of 1,7-dimethylxanthine (10microM), LPS-induced production of the cytokines IL-6 and TNF-alpha was significantly suppressed. 1,7-Dimethylxanthine exerts anti-inflammatory effects, both in vivo mouse as well as ex vivo human. These results suggest that the PARP-1 inhibiting caffeine metabolite 1,7-dimethylxanthine may have therapeutic potential in pulmonary inflammatory diseases such as COPD.
Original language | English |
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Pages (from-to) | 132-139 |
Number of pages | 8 |
Journal | European Journal of Pharmacology |
Volume | 629 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 10 Mar 2010 |
Keywords
- 1,7-dimethylxanthine
- COPD
- Cytokine
- Inflammation
- Poly(ADP-ribose) polymerase-1
- Pulmonary disease
- NECROSIS-FACTOR-ALPHA
- ACUTE LUNG INFLAMMATION
- POLY(ADP-RIBOSE) POLYMERASE-1
- TRANSCRIPTIONAL ACTIVATION
- RIBOSE POLYMERASE
- EPITHELIAL-CELLS
- GENE-EXPRESSION
- ENDOTOXIC-SHOCK
- CAFFEINE
- DISEASE