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Mono-2-ethylhexyl phthalate (MEHP) is the primary metabolite of the ubiquitous plasticizer and toxicant, di-2-ethylhexyl phthalate. MEHP exposure has been linked to abnormal development, increased oxidative stress, and metabolic syndrome in vertebrates. Nuclear factor, Erythroid 2 Like 2 (Nrf2), is a transcription factor that regulates gene expression in response to oxidative stress. We investigated the role of Nrf2a in larval steatosis following embryonic exposure to MEHP. Wild-type and nrf2a mutant (m) zebrafish embryos were exposed to 0 or 200 μg/l MEHP from 6 to either 96 (histology) or 120 hours post fertilization (hpf). At 120 hpf, exposures were ceased and fish were maintained in clean conditions until 15 days post fertilization (dpf). At 15 dpf, fish lengths and lipid content were examined, and the expression of genes involved in the antioxidant response and lipid processing was quantified. At 96 hpf, a subset of animals treated with MEHP had vacuolization in the liver. At 15 dpf, deficient Nrf2a signaling attenuated fish length by 7.7%. MEHP exposure increased hepatic steatosis and increased expression of peroxisome proliferator-activated receptor alpha target fabp1a1. Cumulatively, these data indicate that developmental exposure alone to MEHP may increase risk for hepatic steatosis and that Nrf2a does not play a major role in this phenotype.
Skin is the parchment upon which identity is written; class, race, ethnicity, and gender are all legible upon the human surface. Removing skin tears away identity, and leaves a blank slate upon whichlaw, punishment, sanctity, or monstrosity can be inscribed; whether as an act of penal brutality, as a comic device, or as a sign of spiritual sacrifice, it leaves a lasting impression about the qualities and nature of humanity. Flaying often functioned as an imaginative resource for medieval and early modern artists and writers, even though it seems to have been rarely practiced in reality. From images of Saint Bartholomew holding his skin in his arms, to scenes of execution in Havelok the Dane, to laws that prescribed it as a punishment for treason, this volume explores the ideaand the reality of skin removal - flaying - in the Middle Ages. It interrogates the connection between reality and imagination in depictions of literal skin removal, rather than figurative or theoretical interpretations of flaying, and offers a multilayered view of medieval and early modern perceptions of flaying and its representations in European culture. Its two parts consider practice and representation, capturing the evolution of flaying as both an idea and a practice in the premodern world.
Larissa Tracy is Associate Professor, Longwood University.
Contributors: Frederika Bain, Peter Dent, Kelly DeVries, Valerie Gramling, Perry Neil Harrison, Jack Hartnell, Emily Leverett, Michael Livingston, Sherry C.M. Lindquist, Asa Mittman, Mary Rambaran-Olm, William Sayers, Christina Sciacca, Susan Small, Larissa Tracy, Renée Ward