Whereas the selective transfer of euploid blastocysts may improve implantation and pregnancy percentages, especially in reproductively older women, it does not guarantee the total absence of mitochondrial and/or epigenetic defects in embryos. The presence of induced and/or inherited DNA epigenetic disturbances in ART offspring is unlikely to be prevented, even by replacing the whole cytoplasm of oocytes using nuclear-genome-transfer technology. (C) 2014 Wiley Periodicals, Inc.”
“Chronic noise exposure has Geneticin been associated with abnormalities in glutamate (Glu)-NMDAR signaling and tau hyperphosphorylation. However, further studies are necessary to clarify potential causal relationships.
The aim of the present study was to evaluate the role of NMDA receptors in noise-induced tau hyperphosphorylation in the
rat hippocampus and prefrontal cortex. Male Wistar rats were randomly divided into three groups in the present study: control with isotonic saline instillation (n = 10); noise exposure (100 dB SPL white noise, 4 h/d x 14 d) and treated with saline (n = 10); and noise exposure and GSK3326595 treated with MK-801 (0.5 mg/kg, intraperitoneally; n = 10). The levels of tau phosphorylated at Ser202 and Ser396, and proteins involved in hyperphosphorylation, namely glycogen synthase kinase 3 beta (GSK3 beta) and protein phosphatase 2A (PP2A), were measured in the hippocampus and prefrontal cortex (PFC) after the last noise exposure. We showed that phosphorylated tau levels were enhanced in noise-exposed-rat hippocampus and PFC. MK-801 decreased the hyperphosphoiylation of tau at Ser202 and Ser396 sites in the hippocampus and PFC. Furthermore, MK-801 reversed noise-induced GSK3 beta overexpression but had no significant effect on PP2A levels. This suggests GS1101 that MK-801 protects against chronic-noise-induced tau hyperphosphorylation in the hippocampus and PFC. These
findings demonstrate that Glu-NMDAR signaling may be involved in triggering aberrant tau hyperphosphoiylation in the hippocampus and PFC after chronic noise exposure. (C) 2014 Elsevier B.V. All rights reserved.”
“Myoepitheliomas are rare neoplasms that are typically found in the major and minor salivary glands and represent approximately 1.5% of all salivary gland neoplasms. We present a patient with an exophytic anterior midline neck mass, which was initially believed to be a thyroid isthmus nodule that underwent fine needle aspiration (FNA) biopsy. FNA cytologic evaluation reveals numerous plump spindle cells and a myxoid background, thus raising the possibility of rare benign mixed tumor of the thyroid. However, the resected specimen consists of predominately spindle cells with a minor component of chondromyxoid matrix, and no ductal epithelial cells, favoring a diagnosis of myoepithelioma.