The detrimental effects of vascular risk factors on white matter microstructure were exacerbated among APOE epsilon 4 carriers.”
“MeCP2 is a methyl DNA-binding transcriptional regulator that contributes to the development and function of CNS synapses; however, the requirement for MeCP2 in stimulus-regulated behavioral plasticity

is not fully understood. Here we show that acute viral manipulation of MeCP2 expression in the nucleus accumbens (NAc) bidirectionally modulates amphetamine URMC-099 supplier (AMPH)-induced conditioned place preference. Mecp2 hypomorphic mutant mice have more NAc GABAergic synapses and show deficient AMPH-induced structural plasticity of NAc dendritic spines. Furthermore, these mice show deficient plasticity of striatal immediate early gene inducibility after repeated AMPH administration. Notably, psychostimulants induce phosphorylation of MeCP2 at Ser421, a site that regulates MeCP2′s function as a repressor. Phosphorylation is selectively induced in GABAergic interneurons of the NAc, and its extent strongly

predicts the degree of behavioral sensitization. These data reveal new roles for MeCP2 both in mesolimbocortical circuit development and in the regulation of psychostimulant-induced behaviors.”
“Transient receptor potential melastatin 7 (TRPM7) channels are novel Ca(2+)-permeable non-selective cation channels ubiquitously expressed. Activation of TRPM7 channels has been shown to be involved in cellular Mg(2+) click here homeostasis, diseases caused by abnormal magnesium absorption, and in Ca(2+)-mediated neuronal injury under ischemic conditions. Here we show strong evidence suggesting that TRPM7 channels also play an important role in cellular Zn(2+) homeostasis

and in Zn(2+)-mediated neuronal injury. Using a combination of fluorescent Zn(2+) imaging, small Selleck CB-839 interfering RNA, pharmacological analysis, and cell injury assays, we show that activation of TRPM7 channels augmented Zn(2+)-induced injury of cultured mouse cortical neurons. The Zn(2+)-mediated neurotoxicity was inhibited by nonspecific TRPM7 blockers Gd(3+) or 2-aminoethoxydiphenyl borate, and by knockdown of TRPM7 channels with small interfering RNA. In addition, Zn(2+)-mediated neuronal injury under oxygen-glucose deprivation conditions was also diminished by silencing TRPM7. Furthermore, we show that overexpression of TRPM7 channels in HEK293 cells increased intracellular Zn(2+) accumulation and Zn(2+)-induced cell injury, while silencing TRPM7 by small interfering RNA attenuated the Zn(2+)-mediated cell toxicity. Thus, TRPM7 channels may represent a novel target for neurological disorders where Zn(2+) toxicity plays an important role.”
“Context: UV radiation is responsible for vitamin D synthesis and skin tanning. Longitudinal data relating skin color to vitamin D status are lacking.