Exposure to bisphenol-A (BPA) has been observed to alter developmental pathways and cell processes, at least in part, through epigenetic mechanisms. This study sought to investigate the effect of BPA on microRNAs (miRNAs) in human placental cells. miRNA microarray was performed following BPA treatment in three immortalized cytotrophoblast cell lines and the results validated using quantitative real-time PCR. For functional analysis, overexpression constructs were stably transfected into cells that were then assayed for changes in proliferation and response to toxicants. Microarray analysis revealed several miRNAs to be significantly altered in response to BPA treatment in two cell lines. Real-time PCR results confirmed that miR-146a was particularly strongly induced and its overexpression in cells led to slower proliferation as well as higher sensitivity to the DNA damaging agent, bleomycin. Overall, these results suggest that BPA can alter miRNA expression in placental cells, a potentially novel mode of BPA toxicity.

Synopsis CBT has emerged as a well-established treatment for depression in children and adolescents but treatment trials for adolescents with suicidality are few in number, and their efficacy to date is rather limited. Although a definitive treatment for adolescent suicide attempters has yet to be established, the limited literature suggests that suicidal thoughts and behavior should be directly addressed for optimal treatment outcome. This chapter reviews the rationale underlying the use of CBT for the treatment of depression and suicidality in adolescents, the literature supporting the efficacy of CBT for depressed adolescents, and whether CBT for depression reduces suicidal thoughts and behavior. A description of some of the core cognitive, affective, and behavioral techniques used in CBT treatments of suicidal ideation and behavior in depressed adolescents is included.

No abstract