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An investigation of non-depolarizing muscle relaxants on embryonic development in cultured rat embryos

Published online by Cambridge University Press:  23 December 2004

A. K. Karabulut ,
R. Reisli ,
I. I. Uysal ,
J. B. Çelik  and
T. Ziylan
A. K. Karabulut
Affiliation:
Selcuk University, Meram Faculty of Medicine, Department of Anatomy, Konya, Turkey
R. Reisli
Affiliation:
Selcuk University, Meram Faculty of Medicine, Department of Anesthesiology, Konya, Turkey
I. I. Uysal
Affiliation:
Selcuk University, Meram Faculty of Medicine, Department of Anatomy, Konya, Turkey
J. B. Çelik
Affiliation:
Selcuk University, Meram Faculty of Medicine, Department of Anesthesiology, Konya, Turkey
T. Ziylan
Affiliation:
Selcuk University, Meram Faculty of Medicine, Department of Anatomy, Konya, Turkey
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Abstract

Summary

Background and objective: We have investigated the toxic and teratogenic effects of certain non-depolarizing muscle relaxants on embryonic development in cultured rat embryos.

Methods: Rat embryos of 9.5 days were explanted and cultured in vitro for 48 h in rat serum. Whole rat serum was used as a culture medium for the control group while different concentrations of atracurium, cis-atracurium, rocuronium and mivacurium were added to rat serum for the experimental groups. Dose-dependent effects of these agents on embryonic developmental parameters were compared using morphological and biochemical methods. Each embryo was evaluated for the presence of any malformations.

Results: When compared to the control embryos, the muscle relaxants significantly decreased all growth and developmental parameters dose dependently with an increase in overall dismorphology. Among these malformations, maxillary deformity was most frequently observed. These effects were observed in much lower doses with atracurium and cis-atracurium compared to those with rocuronium and mivacurium.

Conclusions: Our results suggest that non-depolarizing muscle relaxants cause dose-dependent toxicity on rat embryos at concentrations much greater than those in clinical practice. Although, these agents seems to have a low potential for causing developmental toxicity during organogenesis, because of the lower toxic effects observed with rocuronium and mivacurium, these agents may be preferred when recurrent administrations are necessary for parturients.

Keywords

NEUROMUSCULAR NON-DEPOLARIZING AGENTS, atracurium, cis-atracurium, rocuronium, mivacuriumCULTURE, whole embryo culturePREGNANCY, toxicityRATS
Type
Original Article
Information
European Journal of Anaesthesiology , Volume 21 , Issue 9 , September 2004 , pp. 715 - 724
Copyright
2004 European Society of Anaesthesiology

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