“
“B cells follow two functionally distinct pathways of development: a classical

germinal center (GC) T-dependent pathway in which diversification and maturation generate a slow, but virtually unlimited high-affinity response to cognate antigens; and a marginal zone (MZ) T-independent pathway providing a first line of ‘innate-like’ defense against specific pathogens. Cells populating these two distinct locations are the normal counterparts SYN-117 order of two clinically important pathological entities, follicular lymphoma (FL) and MZ lymphoma (MZL). FL and MZ represent paradigms of two rising concepts of lymphomagenesis, protracted preclinical and antigen-driven lymphoproliferation, respectively. selleck products Integrating the mechanisms and functions of MZ and GC B cells and the distinctive features of their pathological counterparts should provide essential clues to the understanding of their malignant development, and should offer new insights into the design of effective treatments for B-cell lymphomas.”
“Accumulated evidence suggests that neuropeptide Y (NPY) is involved in emotional disorders by acting on Y-1 and Y-2 receptors. This hypothesis

is based on animal studies carried out in naive normal animals but not in animal models of depression, including the olfactory bulbectomized (OBX) rat. The OBX rat produces a wide array of symptoms that mimic several aspects of human depression and anxiety disorders. In the present study, we aimed to investigate the effects of sustained (2 weeks) intracerebroventricular Histone demethylase administration of NPY Y-1 and Y-2 agonists and antagonists in a battery of behavioral tests including the open field, forced swim test (FST) and social interaction (SI) tests in OBX rats. The levels of Y-1 and Y-2 receptors in the hippocampus and basolateral amygdala (BLA) were also evaluated. Treatment with the Y-1-like receptor agonist, [Leu(31)Pro(34)]PYY,

decreased both depressive- and anxiogenic-like behaviors. The Y-2 receptor antagonist, BIIE0246, decreased the immobility time in the FST in OBX animals and increased active contacts in the SI test in sham rats. The Y-2 agonist, PYY3-36, increased the immobility time in the FST in OBX rats. Additionally, increased levels of Y-2 receptor binding were quantified in the dorsal hippocampus and BLA in OBX rats. Taken together, the autoradiographic results add further evidence that the NPYergic system is altered in disturbed emotional states. Moreover, we demonstrate a differential role for NPY Y-1 and Y-2 receptors in emotional processes under control and challenged conditions.

This article is part of a Special Issue entitled ‘Anxiety and Depression’. (C) 2011 Elsevier Ltd. All rights reserved.”
“Atopy is suggested to be linked to the balance between levels of n-6 and n-3 series of long chain polyunsaturated fatty acids (PUFAs) in the diet.