Related Experiment Video
Updated: Jul 17, 2026
16:24
Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
Published on: February 21, 2014
Estrogen does not regulate CD154 mRNA stability in systemic lupus erythematosus T cells
1Department of Biology, Pittsburg State University, Pittsburg, Kansas 66792, USA.
Lupus
|January 11, 2007
Summary
Estrogen increases CD154 expression in T cells of women with lupus (SLE) not by stabilizing messenger RNA, but likely by increasing its transcription. This finding offers insights into lupus pathogenesis.
Area of Science:
- Immunology
- Endocrinology
- Molecular Biology
Background:
- Previous research demonstrated estrogen's role in elevating CD154 expression in T cells of female patients with Systemic Lupus Erythematosus (SLE).
- The precise mechanism behind this estrogen-dependent increase in CD154 expression remained unclear.
Purpose of the Study:
- To investigate whether the observed estrogen-dependent increase in CD154 expression in T cells from female SLE patients is mediated by messenger RNA (mRNA) stabilization.
- To differentiate between transcriptional and post-transcriptional regulation of CD154 by estradiol in SLE T cells.
Main Methods:
- T cells from female SLE patients and healthy controls were cultured with and without estradiol 17-beta.
- Cells were either left unstimulated (resting) or activated using anti-CD3 antibodies.
- Messenger RNA (mRNA) stability was assessed using reverse-transcription polymerase chain amplification (RT-PCR) in the presence of Actinomycin D to inhibit new mRNA synthesis.
Main Results:
- Estradiol did not significantly alter CD154 mRNA stability in resting or activated T cells from either SLE patients or healthy controls.
- No significant differences in mRNA stability were observed between SLE and normal T cells in response to estradiol.
Conclusions:
- The estrogen-dependent upregulation of CD154 in T cells from female SLE patients is not attributable to increased mRNA stability.
- These findings support the hypothesis that estradiol enhances CD154 expression in SLE T cells primarily through transcriptional regulation.
Related Concept Videos
01:23Regulation of Expression at Multiple Steps
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...
02:51mRNA Stability and Gene Expression
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
01:15Receptor Downregulation in MVBs
Multivesicular bodies (MVBs) are mature endosomes that sort ubiquitinated proteins and then fuse with lysosomes to degrade the sorted proteins. Epidermal growth factor (EGF) and its receptor (EGFR) form a complex that can be internalized through endocytosis, sorted into an MVB, and later degraded.
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR activation may...
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR activation may...
02:24Regulation of Expression Occurs at Multiple Steps
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...