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Dialyzable leukocyte extracts activate TLR-2 on monocytes
Natural Product Communications
|August 14, 2014
Summary
Dialyzable leukocyte extracts (DLE) from healthy donors stimulate cytokine production in immune cells. This suggests DLE
Area of Science:
- Immunology
- Cell Biology
Background:
- Dialyzable leukocyte extracts (DLE) modulate immune responses and treat various diseases.
- Previous studies indicated DLE from infected cells can suppress pro-inflammatory cytokines.
Purpose of the Study:
- To investigate if DLE from uninfected human leukocytes can regulate cytokine production in peripheral blood mononuclear cells (PBMC) in vitro.
- To identify the cellular mechanisms and pathways involved in DLE-mediated immune cell activation.
Main Methods:
- Incubation of human PBMC with DLE.
- Measurement of cytokine production (TNF-alpha, IL-12, IL-10).
- Identification of cytokine-producing cells and assessment of Toll-like receptor (TLR)-2 involvement.
Main Results:
- PBMC produced TNF-alpha, IL-12, and IL-10 upon stimulation with DLE.
- Monocytes were the primary source of TNF-alpha.
- DLE contains ligands that activate TLR-2, directly activating monocytes.
Conclusions:
- DLE from uninfected leukocytes can induce pro-inflammatory cytokine production.
- TLR-2 activation on monocytes is a key mechanism for DLE's immunomodulatory effects.
- DLE may promote a pro-inflammatory environment beneficial for infectious disease control.
