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Neurotensin is an endogenous tridecapeptide that binds to neurotensin receptors in the brain, which induce hypothermia. The aim of this study was to investigate whether the receptor agonist ABS 201 could induce therapeutic hypothermia and improve postresuscitation outcomes in a ventricular fibrillation cardiac arrest (VFCA) rat model. VF was electrically induced in 12 rats. Defibrillation was achieved after 6 min of cardiopulmonary resuscitation. After successful resuscitation, animals were randomized to receive ABS 201 (8 mg/kg/h) or placebo. Postresuscitation myocardial function and neurological deficit scores (NDS) were assessed, and postresuscitation survival duration was observed for up to 72 h. After administration of ABS 201, blood temperature decreased significantly from 37°C to 34°C, and was maintained for 2.5 h. There was a significant improvement of postresuscitation myocardial dysfunction, NDS, and survival duration in animals treated with ABS 201. These results demonstrated that ABS 201 induces therapeutic hypothermia in a VFCA rat model, ameliorates postresuscitation myocardial-neurological dysfunction, and prolongs survival duration. ABS 201 may therefore be an alternative method to induce therapeutic hypothermia with current cooling methods and improve postresuscitation outcomes.

The Effects of Pharmacological Hypothermia Induced by Neurotensin Receptor Agonist ABS 201 on Outcomes of CPR