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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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MicroRNAs01:22

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...
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Related Experiment Video

Updated: Mar 27, 2026

Mouse Model of Surgically-induced Endometriosis by Auto-transplantation of Uterine Tissue
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MiR-202 promotes endometriosis by regulating SOX6 expression.

Dongli Zhang1, Yanyun Li1, Jun Tian1

  • 1Obstetrics and Gynecology of The Huaihe Hospital, Henan University Kaifeng 475000, Henan, China.

International Journal of Clinical and Experimental Medicine
|January 16, 2016
PubMed
Summary

MicroRNA-202 (miR-202) is elevated in endometriosis, promoting disease progression. It targets SOX6, affecting cell proliferation and migration in endometriosis.

Keywords:
EMsSOX6miR-202

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A Syngeneic Murine Model of Endometriosis using Naturally Cycling Mice
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Area of Science:

  • Reproductive biology
  • Molecular endocrinology
  • Genetics

Background:

  • Endometriosis is a complex gynecological disorder characterized by the presence of endometrial tissue outside the uterus.
  • The molecular mechanisms underlying endometriosis pathogenesis remain incompletely understood, highlighting the need for further investigation into regulatory factors.
  • MicroRNAs (miRNAs) have emerged as critical regulators of gene expression implicated in various diseases, including endometriosis.

Purpose of the Study:

  • To elucidate the role and underlying mechanism of microRNA-202 (miR-202) in the development and progression of endometriosis.
  • To investigate the regulatory relationship between miR-202 and its potential target gene, SOX6 (sex determining region Y-box 6), in endometrial cells.

Main Methods:

  • Quantitative real-time PCR (qRT-PCR) was used to measure miR-202 expression in endometrial tissues.
  • Immunohistochemistry and Western blot analysis were employed to assess protein levels of SOX6 and its downstream targets (p21, cyclin D1, pRb).
  • Cell proliferation and migration were evaluated using MTT and Transwell assays, respectively. A dual-luciferase reporter assay confirmed direct targeting of SOX6 by miR-202.

Main Results:

  • MiR-202 expression was significantly higher in both eutopic and ectopic endometrial tissues compared to normal endometrial tissues, with increased levels in advanced stages (III/IV) of endometriosis.
  • SOX6 protein expression was reduced in ectopic endometrial tissues. Downstream targets p21 showed decreased expression, while cyclin D1 and pRb were upregulated in ectopic tissues.
  • In vitro, miR-202 promoted endometrial cell proliferation and migration. Inhibition of miR-202 led to increased SOX6 and p21 expression, and decreased cyclin D1 and pRb expression, confirming miR-202's regulatory role.

Conclusions:

  • MicroRNA-202 is upregulated in endometriosis and acts as a promoter of disease progression.
  • MiR-202 exerts its effects by targeting SOX6 and influencing the expression of its downstream proteins (p21, cyclin D1, pRb).
  • These findings identify miR-202 as a potential therapeutic target for managing endometriosis.