title: Evidence for involvement of steroid receptors and coactivators in neuroepithelial and meningothelial tumors.
abstract: Steroid receptors such as androgen receptor (AR) and estrogen receptors (ER) ER-α and ER-β, and their receptor coactivators (steroid receptor coactivator, SRC) are widely localized in the brain. Although previous studies have investigated the expression of steroid receptors in brain tumors like astrocytoma, the studies on the expression of steroid receptors and SRCs in other brain tumors are lacking. Here, we investigated the expression of AR, ERs, and SRCs in neuroepithelial (medulloblastoma, ependymoma, oligodendroglioma) and meningothelial meningioma using tissue microarray immunohistochemistry. Compared to normal brain tissue, we found that the expression of SRC-1, SRC-3, and ER-α significantly decreased in meningothelial tumor and neuroepithelial tumor, suggesting that the SRC-1/SRC-3 levels may be regulated by ER-α. Moreover, the levels of AR strongly correlated to the levels of ER-β. Furthermore, correlation was also detected between SRC-3 and AR in neuroepithelial tumor, and between ER-α and ER-β in meningothelial tumor. In addition, the decreased ratio of SRC-1/SRC-3 was associated with an increase of ER-β in neuroepithelial tumor. These results indicate that expressions of different steroid receptors and activators may be tumor type dependent. While AR, ER-α, and ER-β may be involved in the pathogenesis of meningothelial tumor, SRCs/ER-β axis and SRC-3/AR axis may play a role in the pathogenesis of neuroepithelial tumor.
authors.affiliation: Department of Neurobiology, Chongqing Key Laboratory of Neurobiology, Third Military Medical University, Chongqing, 400038, China.
authors.forename: Mengying
authors.initials: M
authors.lastname: Liu
authors.forename: Kaiyuan
authors.initials: K
authors.lastname: Zhang
authors.forename: Yangang
authors.initials: Y
authors.lastname: Zhao
authors.forename: Qiang
authors.initials: Q
authors.lastname: Guo
authors.forename: Deyu
authors.initials: D
authors.lastname: Guo
authors.forename: Jiqiang
authors.initials: J
authors.lastname: Zhang
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000378:metabolism*; D047628:Estrogen Receptor alpha / Q000378:metabolism; D047629:Estrogen Receptor beta / Q000378:metabolism; D005260:Female; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000378:metabolism*; D008875:Middle Aged; D018302:Neoplasms, Neuroepithelial / Q000378:metabolism*; D056920:Nuclear Receptor Coactivator 1 / Q000378:metabolism; D051958:Nuclear Receptor Coactivator 2 / Q000378:metabolism; D011944:Receptors, Androgen / Q000378:metabolism; D046888:Tissue Array Analysis; D055815:Young Adult
chemical_list: C506487:ESR1 protein, human; D047628:Estrogen Receptor alpha; D047629:Estrogen Receptor beta; D051958:Nuclear Receptor Coactivator 2; D011944:Receptors, Androgen; D056920:Nuclear Receptor Coactivator 1