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Mast cell chemotactic activity of RANTES
S Mattoli1, V Ackerman, E Vittori
1Institute of Experimental Medicine, Milano, Italy.
Biochemical and Biophysical Research Communications
|April 6, 1995
Summary
Regulated on Activation, Normal T Cell Expressed and Secreted (RANTES) cytokine attracts human mast cells, suggesting a role in allergic reactions. This potent chemoattractant may unify the migration of key immune cells in conditions like asthma.
Area of Science:
- Immunology
- Cell Biology
- Allergy Research
Background:
- RANTES (Regulated on Activation, Normal T Cell Expressed and Secreted) is a cytokine produced by activated T-lymphocytes.
- RANTES exhibits chemotactic activity for memory CD4 T-lymphocytes and eosinophils.
- Mast cells play a crucial role in allergic inflammatory responses.
Purpose of the Study:
- To investigate the effect of RANTES on the migration of human mast cells.
- To compare the potency of RANTES as a chemoattractant for mast cells against other known chemoattractants.
Main Methods:
- Chemotaxis assays were performed using human mast cells.
- RANTES was used as a chemoattractant.
- Comparative analysis with fibronectin and c-kit receptor ligand was conducted on a molar basis.
Main Results:
- RANTES induced directional migration of human mast cells.
- On a molar basis, RANTES demonstrated greater potency than fibronectin and the c-kit receptor ligand in attracting mast cells.
- These findings highlight RANTES's significant chemoattractant properties for mast cells.
Conclusions:
- RANTES is a potent chemoattractant for human mast cells.
- This cytokine may represent a common mechanism orchestrating the selective migration of memory CD4 T-lymphocytes, eosinophils, and mast cells to tissue sites during allergic reactions.
- Asthma and allergic rhinitis are potential clinical conditions where this RANTES-mediated immune cell recruitment may be observed.