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MiR-448 targets BLC2 and inhibits the growth of pituitary adenoma cells

Chao He1,1, Jun Yang1,1, Jiawang Ding1,1

  • 1Institute of Cardiology, China Three Gorges University, Yichang, Hubei 443003, P.R. China.

Biochemistry and Cell Biology = Biochimie Et Biologie Cellulaire
|July 11, 2020
PubMed

Insights

MicroRNA-448 (miR-448) acts as a tumor suppressor in pituitary adenoma by inhibiting cell proliferation and migration. Its downregulation and interaction with BCL2 highlight its therapeutic potential.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Oncology

Background:

  • MicroRNAs (miRNAs) play crucial roles in pituitary adenoma development.
  • Previous research suggests miR-448 has tumor-suppressive functions in various cancers.
  • The specific role of miR-448 in pituitary adenoma remains largely uncharacterized.

Purpose of the Study:

  • To investigate the expression and function of miR-448 in pituitary adenoma.
  • To identify the molecular targets of miR-448 in pituitary adenoma.
  • To elucidate the miR-448-mediated regulatory mechanisms in pituitary adenoma progression.

Main Methods:

  • Quantitative real-time PCR to assess miR-448 expression in pituitary adenoma tissues and cell lines.
  • Cell proliferation, migration, and apoptosis assays following miR-448 overexpression.
  • Bioinformatic analysis to predict miR-448 targets.
  • Luciferase reporter assays and Western blotting to validate BCL2 as a direct target of miR-448.

Main Results:

  • miR-448 expression was significantly downregulated in pituitary adenoma.
  • Overexpression of miR-448 suppressed pituitary adenoma cell proliferation and migration.
  • miR-448 overexpression induced apoptosis in pituitary adenoma cells.
  • BCL2 was identified as a direct target of miR-448, with miR-448 binding to the 3'-UTR of BCL2 and inhibiting its expression.
  • A negative correlation was observed between miR-448 and BCL2 levels in pituitary adenoma tissues.
  • High BCL2 expression attenuated the inhibitory effects of miR-448 on cell proliferation and apoptosis.

Conclusions:

  • miR-448 functions as a tumor suppressor in pituitary adenoma.
  • The miR-448-BCL2 axis is implicated in the pathogenesis of pituitary adenoma.
  • miR-448 represents a potential therapeutic target for pituitary adenoma treatment.
Keywords:
BCL2BLC2adénome hypophysairemiR-448pituitary adenoma

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