Aromatase is increased in astrocytes in the presence of elevated pressure

J. W. Gatson, J. W. Simpkins, K. D. Yi, A. H. Idris, J. P. Minei, J. G. Wigginton

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

After traumatic brain injury (TBI), a progressive injury and death of neurons and glia leads to decreased brain function. Endogenous and exogenous estrogens may protect these vulnerable cells. In this study, we hypothesized that increased pressure leads to an increase in aromatase expression and estrogen production in astrocytes. In this study, we subjected rat glioma (C6) cells and primary cortical astrocytes to increased pressure (25 mm Hg) for 1, 3, 6, 12, 24, 48, and 72 h. Total aromatase protein and RNA levels were measured using Western analysis and RT-PCR, respectively. In addition, we measured aromatase activity by assaying estrone levels after administration of its precursor, androstenedione.Wefound that increased pressure applied to the C6 cells and primary cortical astrocytes resulted in a significant increase in both aromatase RNA and protein. To extend these findings,wealso analyzed aromatase activity in the primary astrocytes during increased pressure. We found that increased pressure resulted in a significant (P < 0.01) increase in the conversion of androstenedione to estrone. In conclusion, we propose that after TBI, astrocytes sense increased pressure, leading to an increase in aromatase production and activity in the brain. These results may suggest mechanisms of brain estrogen production after increases in pressure as seen in TBI patients.

Original languageEnglish (US)
Pages (from-to)207-213
Number of pages7
JournalEndocrinology
Volume152
Issue number1
DOIs
StatePublished - Jan 2011

ASJC Scopus subject areas

  • Endocrinology

Fingerprint Dive into the research topics of 'Aromatase is increased in astrocytes in the presence of elevated pressure'. Together they form a unique fingerprint.

  • Cite this