Unknown

Dataset Information

0

Estrogen Receptor (ER)-α36 Is Involved in Estrogen- and Tamoxifen-Induced Neuroprotective Effects in Ischemic Stroke Models.


ABSTRACT: The neuroprotection by estrogen (E2) and tamoxifen is well documented in experimental stroke models; however, the exact mechanism is unclear. A membrane-based estrogen receptor, ER-α36, has been identified. Postmenopausal-levels of E2 act through ER-α36 to induce osteoclast apoptosis due to a prolonged activation of the mitogen-activated protein kinase (MAPK)/extracellular signal-related kinase (ERK) signaling. We hypothesized that ER-α36 may play a role in the neuroprotective activities of estrogen and tamoxifen. Here, we studied ER-α36 expression in the brain, as well as its neuroprotective effects against oxygen and glucose deprivation (OGD) in PC12 cells. We found that ER-α36 was expressed in both rat and human brain. In addition, OGD-induced cell death was prevented by l nmol/L 17β-estradiol (E2β). E2β activates the MAPK/ERK signaling pathway in PC12 cells under basal and OGD conditions by interacting with ER-α36 and also induces ER-α36 expression. Low-dose of tamoxifen up-regulated ER-α36 expression and enhanced neuronal survival in an ovariectomized ischemic stroke model. Furthermore, low-dose of tamoxifen enhanced neuroprotective effects by modulating activates or suppress ER-α36. Our results thus demonstrated that ER-α36 is involved in neuroprotective activities mediated by both estrogen and tamoxifen.

SUBMITTER: Zou W 

PROVIDER: S-EPMC4618921 | biostudies-literature |

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC4396031 | biostudies-literature
| S-EPMC3928099 | biostudies-literature
| S-EPMC8643058 | biostudies-literature
| S-EPMC8317436 | biostudies-literature
| S-EPMC1976208 | biostudies-literature
2015-08-21 | PXD000485 | Pride
2015-08-21 | PXD000484 | Pride
| S-EPMC10741999 | biostudies-literature
| S-EPMC8553307 | biostudies-literature
| S-EPMC5986198 | biostudies-literature