Differences between NMRI and DBA/2J mice in the development of somites and susceptibility to methylnitrosourea-induced skeleton anomalies
An. acad. bras. ciênc
; 89(1,supl): 635-647, May. 2017. tab, graf
Article
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| LILACS
| ID: biblio-886672
المكتبة المسؤولة:
BR1.1
ABSTRACT
ABSTRACT The development of DBA/2J mouse strain embryos is nearly 12 h - or 6 somite pairs - delayed as compared to the outbred NMRI mouse embryos of the same age on gestation days (GD) 8-12. To evaluate inter-strain differences in susceptibility to teratogens, dams were treated with methylnitrosourea (MNU, 5 mg/kg body weight i.p.) on defined gestation days (NMRI GD 9, 91/2 or 10; DBA/2J GD 10 or 101/2). Skeletal anomalies produced by MNU on both mouse strains varied with the GD of treatment. The pattern of anomalies produced by MNU on a given GD markedly differed between the two mouse strains, yet they were similar -with a few exceptions- when exposures at equivalent embryonic stages are compared. Findings from this study indicated that strain-dependent differences in the developmental stage of mouse embryos of the same gestational age occur, a possibility that has been often neglected when inter-strain differences in susceptibility to developmental toxicants are interpreted.
Key words
النص الكامل:
1
الفهرس:
LILACS
الموضوع الرئيسي:
Skeleton
/
Teratogens
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Somites
/
Embryonic Development
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Embryo, Mammalian
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Methylnitrosourea
المحددات:
Animals
/
Pregnancy
اللغة:
En
مجلة:
An. acad. bras. ciênc
موضوع المجلة:
CIENCIA
السنة:
2017
نوع:
Article