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Updated: May 12, 2026

In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice
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In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice

Published on: August 23, 2019

Inhibition of miR-21 induces biological and behavioral alterations in diffuse large B-cell lymphoma

Ling Gu1, Guoqi Song, Liping Chen

  • 1Department of Life Sciences, Nanjing Normal University, Nanjing, China.

Acta Haematologica
|April 4, 2013
PubMed

Insights

MicroRNA-21 (miR-21) is upregulated in diffuse large B-cell lymphoma (DLBCL). Inhibiting miR-21 suppresses DLBCL cell proliferation and invasion while increasing apoptosis, suggesting therapeutic potential.

Area of Science:

  • Molecular Biology
  • Oncology
  • Genetics

Background:

  • MicroRNA-21 (miR-21) plays a role in tumorigenesis by inhibiting gene expression.
  • The specific function of miR-21 in diffuse large B-cell lymphoma (DLBCL) and its impact on cellular phenotype remain largely unelucidated.

Purpose of the Study:

  • To investigate the expression levels of miR-21 in DLBCL.
  • To determine the role of miR-21 in regulating key cellular processes within DLBCL.
  • To explore the potential of targeting miR-21 as a therapeutic strategy for DLBCL.

Main Methods:

  • Real-time quantitative reverse-transcription polymerase chain reaction (qRT-PCR) to assess miR-21 expression.
  • miR-21 knockdown using anti-miR-21 transfection.
  • Luciferase reporter assay, qRT-PCR, and Western blot to evaluate PDCD4 and PTEN expression.

Main Results:

  • miR-21 expression was significantly higher in activated B-cell-like DLBCL cells compared to germinal center-like DLBCL cells.
  • Inhibition of miR-21 led to decreased proliferation and invasion, and increased apoptosis in DLBCL cells.
  • Knockdown of miR-21 resulted in elevated protein levels of PDCD4 and PTEN, but not mRNA levels.

Conclusions:

  • miR-21 is upregulated in specific DLBCL subtypes and significantly influences cell proliferation, invasion, and apoptosis.
  • Targeting miR-21 demonstrates potential as a novel therapeutic approach for treating DLBCL.

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