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https://www.selleckchem.com/products/ly333531.html Cholesterol loading of Soat1 gene edited cells, mimicking the AKR allele, led to increased free cholesterol levels and restored CHOP induction. The upstream pathway of free cholesterol induced endoplasmic reticulum stress was investigated; and, RNA-dependent protein kinase-like endoplasmic reticulum kinase (PERK) and inositol-requiring enzyme 1 α protein kinase (IRE1α) pathways were required for maximal CHOP expression.(±) 3,4-Methylenedioxymethamphetamine (MDMA) is a recreationally abused psychostimulant that impairs memory performance. This effect is often attributed to a working memory impairment resulting from compromised serotonin systems. However, recent evidence from non-human animal experimental studies suggests that acute MDMA may indirectly impair memory performance through overstimulation of dopamine (DA) D1 receptors, which increases perseverative responding during memory tasks. This hypothesis was explored using DA D1 mutant (DAD1-/-) rats which possess a selective down-regulation in functional D1 receptors. Adult male Wistar DAD1-/- rats and wild type controls were trained over 25 sessions on a spatial working memory T-maze delayed non-matching to position (DNMTP) task. Once trained, the rats were administered MDMA (1.5, 2.25 and 3 mg/kg) or saline fifteen minutes prior to testing on DNMTP with all subjects experiencing all drug doses and saline three times. We predicted that controls would demonstrate decreased task accuracy following MDMA, driven by an increase in perseverative errors. In contrast, we predicted that DAD1-/- rats would be protected from MDMA-induced perseverative errors due to their reduced D1 receptor function. As predicted, during the third block of MDMA administration, control rats demonstrated decreased task accuracy following 2.25 and 3 mg/kg doses, driven by an increase in perseverative errors. In addition, DAD1-/- rats were protected from MDMA-induced task deficits. These findi

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