Journal article

Cardiovascular actions of the venom from the Irukandji (Carukia barnesi) jellyfish: Effects in human, rat and guinea-pig tissues in vitro and in pigs in vivo

KD Winkel, J Tibballs, P Molenaar, G Lambert, P Coles, M Ross-Smith, C Wiltshire, PJ Fenner, LA Gershwin, GM Hawdon, CE Wright, JA Angus

Clinical and Experimental Pharmacology and Physiology | WILEY | Published : 2005

Abstract

1. We have investigated the cardiovascular pharmacology of the crude venom extract (CVE) from the potentially lethal, very small carybdeid jellyfish Carukia barnesi, in rat, guinea-pig and human isolated tissues and anaesthetized piglets. 2. In rat and guinea-pig isolated right atria, CVE (0.1-10 microg/mL) caused tachycardia in the presence of atropine (1 micromol/L), a response almost completely abolished by pretreatment with tetrodotoxin (TTX; 0.1 micromol/L). In paced left atria from guinea-pig or rat, CVE (0.1-3 microg/mL) caused a positive inotropic response in the presence of atropine (1 micromol/L). 3. In rat mesenteric small arteries, CVE (0.1-30 microg/mL) caused concentration-depe..

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