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Valéria Cintra Barbosa-Lorenzi1,2, Nerry Tatiana Cecilio1, Patricia Andressa de Almeida Buranello1,3

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Recombinant ArtinM (rArtinM) effectively activates and degranulates mast cells, releasing key inflammatory mediators. This study confirms rArtinM as a promising pharmacological agent for mast cell-related conditions.

Keywords:
ArtinMDegranulationLectinMast cellsrArtinM

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Area of Science:

  • Immunology
  • Biochemistry

Background:

  • Mast cells are crucial immune cells involved in allergic reactions and pathogen defense.
  • ArtinM, a plant lectin, activates mast cells and influences immune responses.
  • Recombinant ArtinM (rArtinM) was developed for potential pharmaceutical applications.

Purpose of the Study:

  • To evaluate the capacity of rArtinM to induce mast cell degranulation and activation.
  • To compare the activity of rArtinM with the native ArtinM.

Main Methods:

  • Assessed rArtinM's glycan binding specificity.
  • Measured mast cell degranulation markers (β-hexosaminidase, TNF-α, IL-4).
  • Investigated rArtinM's effect on FcεRI-mediated activation and NFkB signaling.

Main Results:

  • rArtinM demonstrated similar glycan binding to native ArtinM.
  • rArtinM induced mast cell degranulation, releasing β-hexosaminidase and TNF-α.
  • rArtinM promoted mast cell morphological changes and IL-4 release, dependent on NFkB activation.

Conclusions:

  • Recombinant ArtinM (rArtinM) effectively activates and degranulates mast cells via C-type lectin receptors (CRDs).
  • rArtinM serves as a viable alternative to native ArtinM.
  • rArtinM shows potential as a pharmacological agent for immune modulation.