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TAK-242 is a novel compound that suppresses nitric oxide and cytokine production by selectively inhibiting intracellular signals from toll-like receptor (TLR)-4. In the present study, we investigated the effectiveness of TAK-242 against sepsis using an endotoxaemia model in conscious and unrestricted guinea-pigs. Measures examined included muscle tension paralysis of the intestine, blood pressure, high morbidity group box (HMGB)-1 levels and survival rate.

Tension of the longitudinal muscle of the colon was monitored continuously by telemetry. Arterial blood pressure was monitored via a carotid artery catheter. TAK-242 was administered intravenously through a jugular vein catheter. Guinea-pigs were divided into a control group, given vehicle (placebo emulsion), and the experimental group, administered 3 or 10 mg/kg TAK-242, 1 h before administration of 10 mg/kg lipopolysaccharide (LPS).

In the control group, the tension of the longitudinal muscle of the colon decreased in a time-dependent manner and blood pressure was reduced, with maximal effects observed 1–3 h after administration of LPS. In the TAK-242-treated group, LPS-induced relaxation of the intestine and hypotension were significantly inhibited. In the control group, HMGB-1 levels were increased after LPS administration and this reaction was significantly blocked in the TAK-242-treated group. Importantly, survival rate was increased after TAK-242 treatment.

In conlusion, the results of the present study show that TAK-242 inhibited the symptoms associated with endotoxaemia in a guinea-pig model of sepsis and that it may, therefore, be an effective treatment for sepsis.
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Keywords: TAK-242; guinea-pig; high morbidity group box-1; intestinal paralysis; lipopolysaccharide

Document Type: Research Article

Publication date: May 1, 2009

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