Close examination of the frequency distribution of vascular perimeter highlights that alterations in vascular morphology persist in the near term fetal brain for up to 48 h following a brief (10 min) hypoxia in white but not gray matter. These findings suggest that the near term brain may still be vulnerable to white JQ-EZ-05 mw matter injury following in utero hypoxia. (c) 2012 Elsevier Inc. All rights reserved.”
“High level of apoptosis and low AKT activation in mass screening as opposed to standard neuroblastoma\n\nAims:\n\nNeuroblastoma is a paediatric solid tumour with a poor outcome except in children < 1 year old. Based on catecholamine

urinary excretion, mass screening (MS) programmes have been organized but failed to decrease the mortality of this tumour. To test the hypotheses of a spontaneous maturation/differentiation or regression, the levels of poly (ADP-ribose) polymerase (PARP)-1, an Bcl-2 inhibitor early apoptosis marker,

of PhosphoAKT, a major apoptosis inhibitor, and of maturation/differentiation were compared in standard and in MS neuroblastomas.\n\nMethods and results:\n\nWe performed a case-control study of 55 primary tumours and 21 metastases of MS neuroblastomas. Matched controls were standard unscreened neuroblastomas and were paired according to age, stage, and MYCN amplification. The tumours were included in tissue microarrays. Immunohistochemical staining was performed using antibodies against, AKT, phosphoAKT, TRKB and PARP-1. The expression of PARP-1 and that of phosphoAKT were significantly higher in standard than in MS neuroblastomas independently of age and stage of the tumour. PhosphoAKT and PARP-1 expression was significantly correlated in both tumours.\n\nConclusions:\n\nThese data suggest that the better prognosis of patients with MS neuroblastomas compared with Selleck MAPK inhibitor classical neuroblastomas was secondary to spontaneous tumour regression mediated by higher levels of apoptosis associated with low activation

of AKT.”
“Endogenes rarely support transitive silencing, whereas most transgenes generally allow the spread of silencing to occur along the primary target. To determine whether the presence of introns might explain the difference, we investigated the influence of introns in the primary target on 3′-5′ silencing transitivity. When present in a transgene, an intron-containing endogene fragment does not prohibit the spread of silencing across this fragment, indicating that introns do not preclude silencing transitivity along endogenes. Also, a multiple intron-containing genomic gene fragment that had previously been shown not to support transitivity in an endogenous context could support transitivity when present in a transgene.