Teratogenic effect of retinoic acid in swiss mice Efeito teratogênico do ácido retinóico em camundongo swiss
PURPOSE: To identify the types of malformations resulting from the administration of retinoic acid (RA) to Swiss mice on different days of pregnancy. METHODS: Twenty-four pregnant Swiss mice were divided into 4 groups of 6 animals each. The experimental groups received a single intraperitoneal injec...
Main Authors: | , , |
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Format: | Article |
Language: | English |
Published: |
Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia
2007-12-01
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Series: | Acta Cirurgica Brasileira |
Subjects: | |
Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502007000600007 |
Summary: | PURPOSE: To identify the types of malformations resulting from the administration of retinoic acid (RA) to Swiss mice on different days of pregnancy. METHODS: Twenty-four pregnant Swiss mice were divided into 4 groups of 6 animals each. The experimental groups received a single intraperitoneal injection of RA (70 mg/kg) on gestational days 7, 8 and 9 (D7, D8 and D9), while control animals (C) received only saline solution. RESULTS: Were obtained: exencephaly (C:0; D7:16.1%; D8:25.4%; D9:0), myelomeningocele (C:0; D7:25.8%, D8:30.9%, D9:0), spina bifida occulta (C:0, D7:29%, D8:41.8%, D90), gastroschisis (C:0, D7:6.4% D8:5.4%, D9:0), omphalocele (C:0, D7:6.4%, D8:14.5%, D9:0), lower limb alterations (C:0, D7:74.1%, D8:80%, D9:0), imperforated anus (C:0, D7:100%, D8:100%, D9:100%), and tail agenesis/alteration (C: D7:100%, D8:100%, D9:100%). CONCLUSION: The experimental model using Swiss mice proved to be efficient in the induction of the different types of defects, with the eighth gestational day being the one that most favored the induction of neural tube defect, omphalocele, gastroschisis, lower limb defects, imperforated anus and tail agenesis/alteration. On this basis, this is a useful model for future investigation of neural development and of the formation of the appendicular skeleton.<br>OBJETIVO: Identificar os tipos de malformação resultantes da administração do ácido retinóico (AR) a camundongos Swiss em diferentes dias gestacionais. MÉTODOS: Foram utilizados 24 camundongos fêmeas, linhagem Swiss, prenhes, divididos em 4 grupos com 6 animais cada. Os grupos experimentais receberam uma única injeção intraperitoneal de AR (70mg/Kg) nos dias gestacionais 7, 8 e 9 (D7, D8 e D9), enquanto que os animais do grupo controle (C) receberam apenas solução salina. RESULTADOS: Foram encontrados: exencefalia (C:0; D7:16.1%; D8:25.4%; D9:0); mielomeningocele (C:0; D7:25.8%; D8:30.9%; D9:0); Espina Bífida Oculta (C:0; D7:29%; D8:41.8%; D90); gastrosquise (C:0; D7:6.4% D8:5.4%; D9:0); onfalocele (C:0; D7:6.4%; D8:14.5%; D9:0); alterações do membro inferior (C:0; D7:74.1%; D8:80%; D9:0); imperfuração anal (C:0; D7:100%; D8:100%; D9:100%) e agenesia/alteração de cauda (C: D7:100%; D8:100%; D9:100%). CONCLUSÕES: O modelo experimental utilizando camundongo Swiss mostrou-se eficiente na indução dos diferentes tipos de defeitos, sendo o oitavo dia gestacional o mais propicio na indução de DFTN, onfalocele, gastrosquise, defeitos de membro inferior, imperfuração anal e agenesia/alteração de cauda, tornando este um modelo útil para futuras investigações do desenvolvimento neural e no processo de formação do esqueleto apendicular. |
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ISSN: | 0102-8650 1678-2674 |