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See detailDifferential neuropathic pain sensitivity and expression of spinal mediators in Lewis and Fischer 344 rats.
Le Coz, Glenn-Marie UL; Fiatte, Cathy; Anton, Fernand UL et al

in BMC neuroscience (2014), 15(1), 35

BACKGROUND: Altered hypothalamo-pituitary-adrenal (HPA) axis activity may be accompanied by a modulation of pain sensitivity. In a model of neuropathic pain (chronic constriction injury, CCI) we ... [more ▼]

BACKGROUND: Altered hypothalamo-pituitary-adrenal (HPA) axis activity may be accompanied by a modulation of pain sensitivity. In a model of neuropathic pain (chronic constriction injury, CCI) we investigated the onset and maintenance of mechanical allodynia/hyperalgesia and the expression of biochemical mediators potentially involved in spinal cell modulation in two rat strains displaying either hypo- (Lewis-LEW) or hyper- (Fischer 344-FIS) reactivity of the HPA axis. RESULTS: Mechanical pain thresholds and plasmatic corticosterone levels were assessed before and during periods of 4 or 21 days following CCI surgery. At the end of the respective protocols, the mRNA expression of glial cell markers (GFAP and Iba1) and glutamate transporters (EAAT3 and EAAT2) were examined. We observed a correlation between the HPA axis reactivity and the pain behavior but not as commonly described in the literature; LEW rats seemed to be less sensitive than FIS from 4 to 14 days after the CCI surgery when looking at the mechanical allodynia/hyperalgesia. However, the biochemical spinal markers expression we observed is conflicting. CONCLUSION: We did not find a specific causal relation between the pain behavior and the glial cell activation or the expression of the glutamate transporters, suggesting that the interaction between the HPA axis and the spinal activation pattern is more complex in a context of neuropathic pain. [less ▲]

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See detailThe influence of stationary synaptic activity on the PRC
Garcia, Guadalupe Clara UL; Gemma, Huguet; Rinzel, John

in BMC Neuroscience (2011), 12

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See detailJAM-A is a novel surface marker for NG2-Glia in the adult mouse brain.
Stelzer, Sandra; Ebnet, Klaus; Schwamborn, Jens Christian UL

in BMC Neuroscience (2010), 11

BACKGROUND: Junctional adhesion molecule-A (JAM-A) is an adhesive protein expressed in various cell types. JAM-A localizes to the tight junctions between contacting endothelial and epithelial cells, where ... [more ▼]

BACKGROUND: Junctional adhesion molecule-A (JAM-A) is an adhesive protein expressed in various cell types. JAM-A localizes to the tight junctions between contacting endothelial and epithelial cells, where it contributes to cell-cell adhesion and to the control of paracellular permeability. RESULTS: So far, the expression pattern of JAM-A has not been described in detail for the different cell types of the adult brain. Here we show that a subset of proliferating cells in the adult mouse brain express JAM-A. We further clarify that these cells belong to the lineage of NG2-glia cells. Although these mitotic NG2-glia cells express JAM-A, the protein never shows a polarized subcellular distribution. Also non-mitotic NG2-glia cells express JAM-A in a non-polarized pattern on their surface. CONCLUSIONS: Our data show that JAM-A is a novel surface marker for NG2-glia cells of the adult brain. [less ▲]

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