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HERO ID
759184
Reference Type
Journal Article
Title
Altered methanol embryopathies in embryo culture with mutant catalase-deficient mice and transgenic mice expressing human catalase
Author(s)
Miller, L; Wells, PG
Year
2011
Is Peer Reviewed?
1
Journal
Toxicology and Applied Pharmacology
ISSN:
0041-008X
EISSN:
1096-0333
Volume
252
Issue
1
Page Numbers
55-61
Language
English
PMID
21295602
DOI
10.1016/j.taap.2011.01.019
Web of Science Id
WOS:000288774000007
Abstract
The mechanisms underlying the teratogenicity of methanol (MeOH) in rodents, unlike its acute toxicity in humans, are unclear, but may involve reactive oxygen species (ROS). Embryonic catalase, although expressed at about 5% of maternal activity, may protect the embryo by detoxifying ROS. This hypothesis was investigated in whole embryo culture to remove confounding maternal factors, including metabolism of MeOH by maternal catalase. C57BL/6 (C57) mouse embryos expressing human catalase (hCat) or their wild-type (C57 WT) controls, and C3Ga.Cg-Catb/J acatalasemic (aCat) mouse embryos or their wild-type C3HeB/FeJ (C3H WT) controls, were explanted on gestational day (GD) 9 (plug=GD 1), exposed for 24 h to 4 mg/ml MeOH or vehicle, and evaluated for functional and morphological changes. hCat and C57 WT vehicle-exposed embryos developed normally. MeOH was embryopathic in C57 WT embryos, evidenced by decreases in anterior neuropore closure, somites developed and turning, whereas hCat embryos were protected. Vehicle-exposed aCat mouse embryos had lower yolk sac diameters compared to C3H WT controls, suggesting that endogenous ROS are embryopathic. MeOH was more embryopathic in aCat embryos than WT controls, with reduced anterior neuropore closure and head length only in catalase-deficient embryos. These data suggest that ROS may be involved in the embryopathic mechanism of methanol, and that embryonic catalase activity may be a determinant of teratological risk.
Keywords
Methanol; Catalase; Embryopathies; Reactive oxygen species; Transgenic mice; Mutant mice; Teratogenesis
Tags
IRIS
•
Methanol (Non-Cancer)
Cited in Final (2013)
Cited in External Review Draft (2013)
Cited in External Review Draft (2011)
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