The only exception to this pattern was the ventromedial nucleus. The thalamic neurons are mostly devoid of IMPACT, with the exception of the paraventricular, reuniens and reticular nuclei, and intergeniculate leaf. The brainstem displayed high levels of IMPACT. For the marmoset, IMPACT expression in the brain is not
as prominent when compared to other organs. In the marmoset brain the pattern of IMPACT expression was similar to rodents in most areas, except for the very strong labeling of the Purkinje cells, the lack of IMPACT-positive neurons in the nucleus reuniens, and weak labeling of interneurons in the hippocampus. GCN1, the activator of GCN2 to which IMPACT binds, Selleck SBE-β-CD is widely distributed in all neuronal populations, and all IMPACT-positive cells were also GCN1-positive. The data presented herein suggest that IMPACT may
be involved in biochemical homeostatic mechanisms that would prevent GCN2 activation and therefore ATF4 (CREB-2) synthesis in neurons.”
“Background: Growth in fishes is regulated via many environmental and physiological factors and is shaped by the genetic background of each individual. Previous microarray studies of salmonid growth have examined fish experiencing either muscle wastage or accelerated growth patterns following refeeding, or the influence of growth hormone and transgenesis. This study determines the gene expression profiles of genetically unmanipulated large and small fish from a domesticated salmonid strain reared on a typical feeding regime. Gene expression profiles of white muscle and liver from rainbow trout (Oncorhynchus mykiss) from two seasonal spawning groups NVP-BSK805 (September and December lots) within a single strain were examined when the fish were 15 months of age to assess the influence of season (late fall vs. onset of spring) and body size (large vs. small).\n\nResults: CA3 Although IGFBP1 gene expression
was up-regulated in the livers of small fish in both seasonal lots, few expression differences were detected in the liver overall. Faster growing Dec. fish showed a greater number of differences in white muscle expression compared to Sept. fish. Significant differences in the GO Generic Level 3 categories ‘response to external stimulus’, ‘establishment of localization’, and ‘response to stress’ were detected in white muscle tissue between large and small fish. Larger fish showed up-regulation of cytoskeletal component genes while many genes related to myofibril components of muscle tissue were up-regulated in small fish. Most of the genes up-regulated in large fish within the ‘response to stress’ category are involved in immunity while in small fish most of these gene functions are related to apoptosis.\n\nConclusions: A higher proportion of genes in white muscle compared to liver showed similar patterns of up-or down-regulation within the same size class across seasons supporting their utility as biomarkers for growth in rainbow trout. Differences between large and small Sept.