Enhanced transcription of estrogen receptor α and mitochondrial cytochrome b genes in uterine leiomyomas

The relative expression levels of estrogen receptor α (ERα) and mitochondrial cytochrome b (MTCYB) transcripts and their association with ERα, −397T > C gene polymorphism was determined in premenopausal uterine leiomyomas and myometrium tissues to gain an insight into the role of ER-mediated acti...

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Bibliographic Details
Published in:Gynecological endocrinology 2011-12, Vol.27 (12), p.1094-1098
Main Authors: Shaik, Noor Ahmad, Lone, Waseem Gul, Khan, Imran Ali, Rao, Kaipa Prabhakar, Kodati, Vijaya Lakshmi, Hasan, Qurratulain
Format: Article
Language:English
Subjects:
Adult
Case-Control Studies
Cytochromes b - genetics
Cytochromes b - metabolism
Estrogen Receptor alpha - genetics
Estrogen Receptor alpha - metabolism
estrogen receptor α
Female
Gene Expression Regulation, Neoplastic
Genes, Mitochondrial - genetics
Genotype
Humans
Leiomyoma - genetics
Leiomyoma - metabolism
Leiomyoma - pathology
Mitochondria - genetics
Mitochondria - metabolism
mitochondrial cytochrome b
Models, Biological
Myometrium - metabolism
Myometrium - pathology
Premenopause - genetics
real-time PCR
Transcription, Genetic - physiology
Up-Regulation - genetics
Uterine leiomyomas
Uterine Neoplasms - genetics
Uterine Neoplasms - metabolism
Uterine Neoplasms - pathology
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Summary:The relative expression levels of estrogen receptor α (ERα) and mitochondrial cytochrome b (MTCYB) transcripts and their association with ERα, −397T > C gene polymorphism was determined in premenopausal uterine leiomyomas and myometrium tissues to gain an insight into the role of ER-mediated action of estrogen on mitochondrial gene transcription. Both ERα and MTCYB transcripts were overexpressed in leiomyomas compared with myometrium tissues with 9.18 ± 0.79 folds and 5.24 ± 0.48 folds, respectively. ERα demonstrated ≥1.7 folds overexpression expressed over MTCYB (p < 0.001). Genotype correlation with transcript expression revealed that leiomyomas with CC genotype had significantly increased levels of ERα with 11.9 ± 1.02 folds as compared with 6.46 ± 0.56 folds seen in CT and TT genotypes together (p < 0.001). Interestingly, MTCYB transcript levels were also >1.9 folds overexpressed in leiomyomas with the CC genotype as compared with leiomyomas with other genotypes (p < 0.01).Significant elevation of ERα and MTCYB transcript levels in premenopausal leiomyomas and its association with ERα, −397 CC genotype suggests the mitochondrial-mediated role of estrogen as the promoter of leiomyoma tumorigenesis.
ISSN:0951-3590
1473-0766
DOI:10.3109/09513590.2011.569610