Prolonged exposure to a low-dose of bisphenol A increases spontaneous motor activity in adult male rats.

2013: HMasuno; KNojima; TTakata;

J Physiol Sci.2013;63(4):311-5.10.1007/s12576-013-0265-8.

NLM PMID: 23653311

Article abstract

We investigated the effects of bisphenol A (BPA), an environmental endocrine-disrupting chemical, on spontaneous motor activity in adult male rats. The rats were implanted intraperitoneally with mini-osmotic pumps containing either BPA (50 μg/kg body weight per day) in sesame oil (BPA-treated group) or sesame oil only (vehicle-treated group). Spontaneous motor activity during a 24-h period was measured over 5 days from day 9 to day 13 after implantation using an animal movement analysis system. Spontaneous motor activity during the last 2 h of the dark phase and during the first 1-h of the light phase was increased in the BPA-treated group. Total spontaneous motor activity during the 12-h light phase, but not the 12-h dark phase, was higher in the BPA-treated group than in the vehicle-treated group. These findings suggest that BPA may induce hyperactivity in adult male rats during the 12-h light phase, especially during the 2 h immediately preceding sleep-onset and 1 h immediately following sleep-onset.

Research Topics
• Signs and Symptoms
   Hyperkinesis

Title and Abstract from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
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Last MEDLINE®/PubMed® update: 1st of December 2015