Effect of Bacteriophage-Derived Double Stranded RNA on Rat Peritoneal Macrophages and Microglia in Normoxia and Hypoxia

Dace Pjanova (Coresponding Author), Yevheniia Hurmach, Mariia Rudyk, Natalia Khranovska, Oksana Skachkova, Irina Verhovcova, Larysa Skivka

Research output: Contribution to journalArticlepeer-review


The involvement of tissue-resident macrophages (TRMs) in health and diseases makes them unique therapeutic targets. TRMs are activated through their surface pattern recognition receptors, such as Toll-like receptors (TLRs) that are essential sensors of danger signals. Here, we determine the activation status of rat peritoneal macrophages (PMs) and microglia (MG) cells under normal and hypoxic conditions and investigate the effect of TLR3 agonist bacteriophage-derived dsRNA (Larifan) on the metabolic profile of TRMs in vitro. We implemented the phenotypic markers CD14 and CD206, arginine metabolism, phagocytic activity and reactive oxygen species generation as metabolic characteristics to evaluate TRMs activation. We showed that normoxic TRMs from different tissue niches responded to Larifan exposure in different ways. PM exhibited signs towards M1 polarisation. In contrast, the MG activation pattern could be considered as neither pro-inflammatory nor anti-inflammatory. We also showed that TRMs, regardless of the tissue niche, responded to hypoxia with a phenotypic shift towards an anti-inflammatory (M2) state. Larifan could attenuate hypoxia-induced TRMs metabolic programming. However, hypoxic conditions could negatively affect the interaction of TRMs with danger signals.

Original languageEnglish
Pages (from-to)343-349
Number of pages7
JournalProceedings of the Latvian Academy of Sciences, Section B: Natural, Exact, and Applied Sciences
Issue number5
Publication statusPublished - 1 Oct 2021
Externally publishedYes


  • Larifan
  • phenotypic shift
  • tissue-resident macrophages
  • TLR3 agonists

Field of Science*

  • 1.6 Biological sciences
  • 3.1 Basic medicine

Publication Type*

  • 1.1. Scientific article indexed in Web of Science and/or Scopus database


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