Effects of a novel recombinant polypeptide from the sea anemone Anthopleura sp. on left ventricular function in New Zealand rabbits with chronic congestive heart failure

Abstract

Abstract: Objective To observe the effects of recombinant hk2a, a novel neurotoxin from the sea anemone Anthopleura sp. on the left ventricular function in New Zealand rabbits with chronic congestive heart failure(CCHF). Methods CHF model was established using New Zealand rabbits by abdominal aortic coarctation. The left ventricular ejection fraction (LVEF) was measured by Acuson ultrasound systems (Sequoia 512) at 0, 5, 15, 30, 45 and 60 min respectively after intravenous injection with a single dose of recombinant hk2a (20 μg/kg·b.w.). The response of the rabbits to hk2a treatment was observed in comparison with that of the control group. Results Recombinant hk2a immediately and significantly increased the left ventricular ejection fraction of the rabbit models of CCHF after intravenous injection (P<0.05), and its effects were maintained for more than 1 h without affecting the heart rate. Conclusion recombinant hk2a significantly increases the left ventricular ejection fraction in New Zealand rabbits with CCHF.

CLC Number:

R541.61
Q463

LIU Yan-bo¹, WANG Peng¹, OUYANG Ping¹, XU Ding-li¹, WANG Lei², WANG Yong-hua², LIANG Dong², WU Ping-sheng¹, XU An-long². Effects of a novel recombinant polypeptide from the sea anemone Anthopleura sp. on left ventricular function in New Zealand rabbits with chronic congestive heart failure[J]. Journal of Southern Medical University, 2004, 24(03): 269-272.

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