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© Research
Publication : Nature immunology

The calcium-activated nonselective cation channel TRPM4 is essential for the migration but not the maturation of dendritic cells

Team: Innate Immunity
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature immunology - 31 Aug 2008

Barbet G, Demion M, Moura IC, Serafini N, Léger T, Vrtovsnik F, Monteiro RC, Guinamard R, Kinet JP, Launay P

Link to Pubmed [PMID] – 18758465

Nat. Immunol. 2008 Oct;9(10):1148-56

Dendritic cell (DC) maturation and migration are events critical for the initiation of immune responses. After encountering pathogens, DCs upregulate the expression of costimulatory molecules and subsequently migrate to secondary lymphoid organs. Calcium (Ca(2+)) entry governs the functions of many hematopoietic cell types, but the role of Ca(2+) entry in DC biology remains unclear. Here we report that the Ca(2+)-activated nonselective cation channel TRPM4 was expressed in and controlled the Ca(2+) homeostasis of mouse DCs. The absence of TRPM4, which elicited Ca(2+) overload, did not influence DC maturation but did considerably impair chemokine-dependent DC migration. Our results establish TRPM4-regulated Ca(2+) homeostasis as crucial for DC mobility but not maturation and emphasize that DC maturation and migration are independently regulated.