Expression of Steroid Receptor Coactivators in Cultured Cells From Paired Myometrial and Fibroid Tissues

Autor: Sonay Hussein-Fikret, Peter J. Fuller, Caroline E. Gargett
Rok vydání: 2005
Předmět:
Adult
Cell type
medicine.medical_specialty
Steroid hormone receptor
medicine.drug_class
Estrogen receptor
Biology
Nuclear Receptor Coactivator 3
Nuclear Receptor Coactivator 2
03 medical and health sciences
Nuclear Receptor Coactivator 1
0302 clinical medicine
Acetyltransferases
Internal medicine
Coactivator
Tumor Cells
Cultured
medicine
Humans
Receptor
Histone Acetyltransferases
Oncogene Proteins
030219 obstetrics & reproductive medicine
Leiomyoma
Reverse Transcriptase Polymerase Chain Reaction
Gene Expression Profiling
Estrogen Receptor alpha
Myometrium
Obstetrics and Gynecology
Muscle
Smooth
Middle Aged
musculoskeletal system
female genital diseases and pregnancy complications
Blotting
Southern
Endocrinology
Estrogen
Uterine Neoplasms
Trans-Activators
Female
030217 neurology & neurosurgery
Transcription Factors
Proto-oncogene tyrosine-protein kinase Src
Zdroj: Journal of the Society for Gynecologic Investigation. 12:445-451
ISSN: 1071-5576
DOI: 10.1016/j.jsgi.2005.04.008
Popis: Fibroid tumor growth in the myometrium appears to be regulated by estrogens but the role of estrogen receptor (ER) coregulators, such as the steroid receptor coactivator (SRC) family members, in fibroid growth is currently unknown. The aims of this study were to compare the expression of the SRC-1, SRC-2, and SRC-3 coactivators between fibroids and normal myometrium in pure populations of cultured smooth muscle cells (SMC) and microvascular endothelial cells (MEC), and also between both cell types, and to identify any relationship between the SRC expression profiles and the known ER status of the SMC and MEC samples examined in this study.Reverse transcriptase-polymerase chain reaction (RT-PCR) coupled with Southern blot analysis was used to derive a semiquantitative estimate of the relative levels of SRC-1, SRC-2, and SRC-3 expression in pure populations of SMC (98% alpha-smooth muscle actin [SMA](+)) and MEC (99% CD31(+)) isolated and cultured from eight samples of paired human myometrial and fibroid tissue.The mean levels of SRC-1, SRC-2, and SRC-3 were each similar in normal myometrium compared to fibroids for SMC and also for MEC. However, SRC-1, SRC-2, and SRC-3 levels were each significantly higher in SMC compared to MEC from both myometrial and fibroid samples, although for SRC-3 there was a trend for higher levels in myometrial samples that did not reach significance. While all SMC samples expressed ERalpha and high coactivator levels, there does not appear to be a relationship between coactivator expression levels and the presence or absence of ERalpha in MEC samples.Coactivators may be more important in ERalpha-mediated growth of SMC than for MEC. Although the SRC family members are likely to play a role in the response of fibroid SMC to estrogen, via ERalpha, changes in their levels do not appear to contribute to the increased sensitivity of fibroid SMC to estrogen.
Databáze: OpenAIRE
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