These results suggest novel deficits in Fyn function, manifested as the downregulation AZD7762 of Fyn protein or the altered transcription of the fyn gene, in patients with schizophrenia. (C) 2008 Elsevier Ireland Ltd. All fights reserved.”
“Intracerebral hemorrhage (ICH), accounting for 15-20% of strokes, can cause significant brain injury and life
long neurological deficits. We investigated whether treadmill exercise rehabilitation could improve brain repair after ICH and whether involvement of NFG-TrkA and BDNF-TrkB signaling could be observed during repair period in an experimental mouse ICH model reproduced by heparinized-collagenase infusion into the left caudate putamen. 5-Bromo-2-deoxyuridine (BrdU) labeled new dividing cell can be observed clearly around the injured cortex and striatum region on day 7 (D7) after operation, and both TrkA and TrkB neurotropic receptors were activated. A subgroup of these ICH mice began the treadmill exercise from D4 after operation. Then we found that the overall immunofluorescent signals of p-Y490-TrkA and p-Y705-TrkB were both decreased in all groups at 014 after
operation. However, compared to the non-exercise ICH group mouse, the immunofluorescent intensity of BDNF and p-Y705-TrkB were significantly buy Rigosertib higher in the exercise group. In addition, there was no difference in p-Y490-TrkA. Our results suggest that BDNF-TrkB but not NGF-TrkA signaling is involved in the brain repair after ICH, and early proper treadmill exercise might promote this repair process. (C) 2012 Elsevier Ireland Ltd. All rights reserved.”
“Failure to elicit broadly neutralizing (bNt) antibodies (Abs) against the membrane-proximal external region of HIV-1
gp41 (MPER) reflects the difficulty of mimicking its neutralization-competent structure (NCS). Here, we analyzed MPER antigenicity in the context of the plasma either membrane and identified a role for the gp41 transmembrane domain (TM) in exposing the epitopes of three bNt monoclonal Abs (MAbs) (2F5, 4E10, and Z13e1). We transiently expressed DNA constructs encoding gp41 ectodomain fragments fused to either the TM of the platelet-derived growth factor receptor (PDGFR) or the gp41 TM and cytoplasmic tail domain (CT). Constructs encoding the MPER tethered to the gp41 TM followed by a 27-residue CT fragment (MPER-TM1) produced optimal MAb binding. Critical binding residues for the three Nt MAbs were identified using a panel of 24 MPER-TM1 mutants bearing single amino acid substitutions in the MPER; many were previously shown to affect MAb-mediated viral neutralization. Moreover, non-Nt mutants of MAbs 2F5 and 4E10 exhibited a reduction in binding to MPER-TM1 and yet maintained binding to synthetic MPER peptides, indicating that MPER-TM1 better approximates the MPER NCS than peptides.