Gregory P. Marshall

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Microglia are increasingly implicated as a source of non-neural regulation of postnatal neurogenesis and neuronal development. To evaluate better the contributions of microglia to neural stem cells (NSCs) of the subventricular neuraxis, we employed an adherent culture system that models the continuing proliferation and differentiation of the dissociated(More)
Microglia, the resident immune cells of the brain, have recently been hypothesized to play a role both in neuronal diseases and age-related neurogenic decline, and are theorized to be modulators of adult neurogenesis. Current methods for the isolation of microglia from cultured primary brain tissue result in relatively poor yield, requiring a large tissue(More)
Spatially and temporally restricted populations of neurogenic astrocytes can generate multipotent neurospheres in vitro. To examine the ability of neurogenic astrocytes to respond to in vivo differentiation cues within a germinal matrix, we provided cultured neonatal cerebellar astrocytes access to the subependymal zone (SEZ) by grafting them directly into(More)
An important issue in stem cell biology relates to mechanisms of cellular plasticity. Specifically, could any observed multipotency of, e.g., adult stem cells arise from true transdifferentiation or as a result of cell-cell fusion? We studied this issue using a culture paradigm of astrocyte monolayers and multipotent neurospheres generated from neonatal(More)
Since their initial description in 1992, neurospheres have appeared in some aspect of more than a thousand published studies. Despite their ubiquitous presence in the scientific literature, there is little consensus regarding the fundamental defining characteristics of neurospheres; thus, there is little agreement about what, if anything, the neurosphere(More)
Microglia isolated from the neurogenic subependymal zone (SEZ) and hippocampus (HC) are capable of massive in vitro population expansion that is not possible with microglia isolated from non-neurogenic regions. We asked if this regional heterogeneity in microglial proliferative capacity is cell intrinsic, or is conferred by interaction with respective(More)
The chlorocarbon mirex undergoes slow, successive loss of chlorine in the field to a series of related compounds that had lost one or more chlorine atoms. Soil samples were recovered 12 years after treatment at 1 part per million (ppm), and ant bait was recovered 5 years after an aircraft crash. As much as 50 percent of the original mirex was recovered at(More)
  • ANGELA TU WEISSENBERGER, Brian Lee Crowley, John C. Crosbie, Peter C. Godsoe, John F. Irving, Bernard Imbeault +18 others
  • 2006
The Atlantic Institute for Market Studies (AIMS) is an independent, non-partisan, social and economic policy think tank based in Halifax. The Institute was founded by a group of Atlantic Canadians to broaden the debate about the realistic options available to build our economy. AIMS was incorporated as a non-profit corporation under Part II of the Canada(More)
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