当前位置: X-MOL 学术Neurotoxicol. Teratol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Sex-specific effects of perinatal FireMaster® 550 (FM 550) exposure on socioemotional behavior in prairie voles.
Neurotoxicology and Teratology ( IF 2.6 ) Pub Date : 2019-11-12 , DOI: 10.1016/j.ntt.2019.106840
Sagi Enicole A Gillera 1 , William P Marinello 1 , Brian M Horman 1 , Allison L Phillips 2 , Matthew T Ruis 2 , Heather M Stapleton 2 , David M Reif 3 , Heather B Patisaul 4
Affiliation  

The rapidly rising incidence of neurodevelopmental disorders with social deficits is raising concern that developmental exposure to environmental contaminants may be contributory. Firemaster 550 (FM 550) is one of the most prevalent flame-retardant (FR) mixtures used in foam-based furniture and baby products and contains both brominated and organophosphate components. We and others have published evidence of developmental neurotoxicity and sex specific effects of FM 550 on anxiety-like and exploratory behaviors. Using a prosocial animal model, we investigated the impact of perinatal FM 550 exposure on a range of socioemotional behaviors including anxiety, attachment, and memory. Virtually unknown to toxicologists, but widely used in the behavioral neurosciences, the prairie vole (Microtus ochrogaster) is a uniquely valuable model organism for examining environmental factors on sociality because this species is spontaneously prosocial, biparental, and displays attachment behaviors including pair bonding. Dams were exposed to 0, 500, 1000, or 2000 μg of FM 550 via subcutaneous (sc) injections throughout gestation, and pups were directly exposed beginning the day after birth until weaning. Adult offspring of both sexes were then subjected to multiple tasks including open field, novel object recognition, and partner preference. Effects were dose responsive and sex-specific, with females more greatly affected. Exposure-related outcomes in females included elevated anxiety, decreased social interaction, decreased exploratory motivation, and aversion to novelty. Exposed males also had social deficits, with males in all three dose groups failing to show a partner preference. Our studies demonstrate the utility of the prairie vole for investigating the impact of chemical exposures on social behavior and support the hypothesis that developmental FR exposure impacts the social brain. Future studies will probe the possible mechanisms by which these effects arise.

中文翻译:

围产期FireMaster®550(FM 550)暴露对草原田鼠的社会情感行为的性别特异性影响。

具有社会缺陷的神经发育障碍的发病率迅速上升,这引起了人们的关注,即发育性暴露于环境污染物可能是造成这种情况的原因。Firemaster 550(FM 550)是泡沫塑料家具和婴儿产品中使用最普遍的阻燃剂(FR)混合物之一,同时包含溴化和有机磷酸酯成分。我们和其他人已经发表了FM 550对焦虑样和探索行为的发育神经毒性和性别特异性影响的证据。使用亲社会动物模型,我们调查了围产期FM 550暴露对一系列社会情绪行为(包括焦虑,依恋和记忆)的影响。毒理学家几乎不知道,但广泛用于行为神经科学,草原田鼠(Microtus ochrogaster)是一种独特的有价值的模式生物,可用于检查社会环境因素,因为该物种自发地亲社会,双亲,并表现出包括配对的附着行为。在整个妊娠期间,通过皮下(sc)注射将大坝暴露于0、500、1000或2000μgFM 550,幼崽从出生后的第二天开始直至断奶,直接暴露。然后,两性的成年后代都要完成多项任务,包括开阔地域,识别新事物以及对伴侣的偏好。影响是剂量反应性和性别特异性的,女性受影响更大。女性的与暴露相关的结局包括焦虑加剧,社交互动减少,探索动机降低以及对新颖性的厌恶。裸露的男性也有社交缺陷,三个剂量组中的男性均未表现出伴侣的偏爱。我们的研究表明,草原田鼠可用于调查化学暴露对社会行为的影响,并支持发育性FR暴露影响社会大脑的假设。未来的研究将探讨产生这些影响的可能机制。
更新日期:2019-11-12
down
wechat
bug