miR-27b*, an oxidative stress-responsive microRNA modulates nuclear factor-kB pathway in RAW 264.7 cells

Sivasubramani Thulasingam, Chandirasegaran Massilamany, Arunakumar Gangaplara, Hongjiu Dai, Shahlo Yarbaeva, Sakthivel Subramaniam, Jean Jack Riethoven, James Eudy, Marjorie Lou, Jay Reddy

Research output: Contribution to journalArticlepeer-review

103 Scopus citations


Reactive oxygen species (ROS) produced in macrophages is critical for microbial killing, but they also take part in inflammation and antigen presentation functions. MicroRNAs (miRNAs) are endogenous regulators of gene expression, and they can control immune responses. To dissect the complex nature of ROS-mediated effects in macrophages, we sought to characterize miRNAs that are responsive to oxidative stress-induced with hydrogen peroxide (H 2O2) in the mouse macrophage cell line, RAW 264.7. We have identified a set of unique miRNAs that are differentially expressed in response to H2O2. These include miR-27a*, miR-27b*, miR-29b*, miR-24-2*, and miR-21*, all of which were downregulated except for miR-21*. By using luciferase reporter vector containing nuclear factor-kB (NF-kB) response elements, we demonstrate that overexpression of miR-27b*suppresses lipopolysaccharide-induced activation of NF-kB in RAW 264.7 cells. Our data suggest that macrophage functions can be regulated by oxidative stress-responsive miRNAs by modulating the NF-kB pathway.

Original languageEnglish (US)
Pages (from-to)181-188
Number of pages8
JournalMolecular and cellular biochemistry
Issue number1-2
StatePublished - Jun 2011


  • Hydrogen peroxide
  • Innate immunity
  • Oxidative stress
  • RAW 264.7 cells
  • microRNAs

ASJC Scopus subject areas

  • Molecular Biology
  • Clinical Biochemistry
  • Cell Biology


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