| First Author | Cordeau P Jr | Year | 2016 |
| Journal | Neurobiol Aging | Volume | 40 |
| Pages | 50-60 | PubMed ID | 26973103 |
| Mgi Jnum | J:234664 | Mgi Id | MGI:5790546 |
| Doi | 10.1016/j.neurobiolaging.2016.01.002 | Citation | Cordeau P Jr., et al. (2016) Estrogen receptors alpha mediates postischemic inflammation in chronically estrogen-deprived mice. Neurobiol Aging 40:50-60 |
| abstractText | Estrogens are known to exert neuroprotective and immuneomodulatory effects after stroke. However, at present, little is known about the role of estrogens and its receptors in postischemic inflammation after menopause. Here, we provide important in vivo evidence of a distinct shift in microglial phenotypes in the model of postmenopause brain. Using a model-system for live imaging of microglial activation in the context of chronic estrogen- and ERalpha-deficiency associated with aging, we observed a marked deregulation of the TLR2 signals and/or microglial activation in ovariectomized and/or ERalpha knockout mice. Further analysis revealed a 5.7-fold increase in IL-6, a 4.7-fold increase in phospho-Stat3 levels suggesting an overactivation of JAK/STAT3 pathway and significantly larger infarction in ERalpha knockouts chronically deprived of estrogen. Taken together, our results suggest that in the experimental model of menopause and/or aging, ERalpha mediates innate immune responses and/or microglial activation, and ischemia-induced production of IL-6. Based on our results, we propose that the loss of functional ERalpha may lead to deregulation of postischemic inflammatory responses and increased vulnerability to ischemic injury in aging female brains. |
