Toll-like receptor agonists differentially regulate cysteinyl-leukotriene receptor 1 expression and function in human dendritic cells
- 1Immunology Division, Department of Pediatrics, Faculty of Medicine, Université de Sherbrooke, Quebec, Canada.
- 0Immunology Division, Department of Pediatrics, Faculty of Medicine, Université de Sherbrooke, Quebec, Canada.
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View abstract on PubMed
Summary
This summary is machine-generated.Leukotriene (LT) function in human dendritic cells (DCs) varies with maturation stimuli. Microbial agents like LPS can reduce DC migration in response to leukotrienes, impacting allergic inflammation.
Area Of Science
- Immunology
- Cell Biology
Background
- Dendritic cells (DCs) mature and migrate to lymph nodes via CCR7/CCL19 signaling.
- Leukotriene C4 (LTC4) transporter deficiency impairs DC migration, which is restored by exogenous LTC4.
Purpose Of The Study
- Investigate the role of leukotrienes (LTs) in human dendritic cell (DC) function.
- Characterize cysteinyl-leukotriene (CysLT) receptor expression and function during DC differentiation and maturation.
Main Methods
- Flow cytometry and real-time PCR for receptor expression analysis.
- Calcium flux and chemotaxis assays to assess responsiveness to LTD4 stimulation.
Main Results
- LPS maturation decreased CysLT receptor 1 (CysLT1) and increased CysLT receptor 2 expression on DCs.
- Poly(I:C) maturation did not alter CysLT receptor expression.
- LTD4 induced calcium flux and chemotaxis in poly(I:C)-matured DCs, but not LPS-matured DCs.
- LTD4 enhanced CCL19-induced migration in poly(I:C)-matured DCs, with weak effects on LPS-matured DCs.
Conclusions
- Human DC response to leukotrienes is stimulus-dependent.
- Microbial agents can modulate DC migration in response to leukotrienes, influencing allergic inflammation.
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