Our results reveal a novel systemic role for MMP12 in postnatal adipose tissue expansion and smoking-associated weight loss by suppressing vascularity within the white adipose tissue depots.”
“Fragile X syndrome (FXS) is a multi-organ disease that leads to mental retardation, macro-orchidism in males and premature ovarian insufficiency in female carriers. FXS is also a prominent monogenic disease associated with autism spectrum disorders (ASDs). FXS is typically caused by the loss of fragile X mental retardation 1 (FMR1) expression, which codes for the RNA-binding protein FMRP. Here we report the discovery
of distinct RNA-recognition elements that correspond to the two independent RNA-binding domains
of FMRP, in addition to the check details binding sites within the messenger RNA targets for wild-type and I304N mutant FMRP isoforms and the FMRP paralogues FXR1P and FXR2P (also known as FXR1 and FXR2). RNA-recognition-element frequency, p38 MAPK pathway ratio and distribution determine target mRNA association with FMRP. Among highly enriched targets, we identify many genes involved in ASD and show that FMRP affects their protein levels in human cell culture, mouse ovaries and human brain. Notably, we discovered that these targets are also dysregulated in Fmr1(-/-) mouse ovaries showing signs of premature follicular overdevelopment. These results indicate that FMRP targets share signalling pathways across different cellular contexts. As the importance of signalling pathways in both FXS and ASD is becoming increasingly apparent, our results provide a ranked list of genes as basis for the pursuit of new therapeutic targets for these neurological disorders.”
“We report a triggering voltage V-trig for observing gate leakage current (I-g) random telegraph noise (RTN) in the post-breakdown regime of HfLaO dielectric metal gate stacks. V-trig, the onset voltage to observe Cl-amidine supplier RTN in degraded
dielectrics, is highly dependent on breakdown hardness, which is controlled by the leakage current compliance (I-gl). This dependence is qualitatively analyzed using a percolation dilation model, where generation of additional traps either at different energy levels or spatial locations gives lower V-trig at higher I-gl. The magnitude of V-trig can be used as a direct indication of the impact of RTN on the performance of the transistor at device level, when V-trig is evaluated by comparing with the device operating voltage. (C) 2012 American Institute of Physics. [doi:10.1063/1.3676255]“
“Although rare, spontaneous intra-orbital hematoma can quickly jeopardize vision. It usually presents with painful proptosis. It can result from multiple etiologies, and the diagnosis is based on imaging studies in the absence of known causes. We describe two cases of spontaneous intraorbital hematoma. The first, of unknown etiology, required needle drainage.