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Published on: September 30, 2016
Micro-ribonucleic Acid 494 regulation of protein S expression
1Department of Hematology, PathWest Laboratory Medicine, Royal Perth Hospital, Perth, WA, Australia.
Journal of Thrombosis and Haemostasis : JTH
|June 25, 2013
Summary
Estrogen increases microRNA-494 (miR-494) which downregulates Protein S (PS) expression by targeting its messenger RNA. This reveals a novel mechanism for estrogen-induced acquired PS deficiency.
Area of Science:
- Molecular Biology
- Gene Regulation
- Hemostasis
Background:
- Acquired Protein S (PS) deficiency is linked to elevated estrogen levels.
- The mechanism behind estrogen-mediated PS deficiency is not fully understood.
- MicroRNAs (miRNAs) are implicated in gene regulation and hemostasis.
Purpose of the Study:
- To investigate how estrogen downregulates PROS1 expression via miR-494.
- To elucidate the role of miR-494 in estrogen-induced Protein S deficiency.
Main Methods:
- Computational analysis identified putative miR-494 binding sites in the PROS1 3'-UTR.
- Dual luciferase reporter assays confirmed direct targeting of PROS1 by miR-494.
- Quantitative PCR and ELISA measured miR-494, PROS1 mRNA, and PS levels in response to estrogen in HuH-7 cells.
Main Results:
- Three potential miR-494 binding sites were found in the PROS1 3'-UTR.
- miR-494 was confirmed to directly target PROS1.
- Estrogen treatment upregulated miR-494 and downregulated PROS1 mRNA and PS levels in liver cells.
Conclusions:
- This study provides the first evidence of miR-494 downregulating PROS1.
- miR-494 is implicated in the mechanism of estrogen-mediated Protein S downregulation.
- Findings contribute to understanding acquired PS deficiency mechanisms.
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