Th1 responses in vivo require cell-specific provision of OX40L dictated by environmental cues.
Dominika W GajdasikFabrina GaspalEmily E HalfordRemi FiancetteEmma E DuttonClaire WillisTimo RückertChiara RomagnaniAudrey GerardSarah L BevingtonAndrew S MacDonaldMarina BottoTimothy J VyseDavid R WithersPublished in: Nature communications (2020)
The OX40-OX40L pathway provides crucial co-stimulatory signals for CD4 T cell responses, however the precise cellular interactions critical for OX40L provision in vivo and when these occur, remains unclear. Here, we demonstrate that provision of OX40L by dendritic cells (DCs), but not T cells, B cells nor group 3 innate lymphoid cells (ILC3s), is critical specifically for the effector Th1 response to an acute systemic infection with Listeria monocytogenes (Lm). OX40L expression by DCs is regulated by cross-talk with NK cells, with IFNγ signalling to the DC to enhance OX40L in a mechanism conserved in both mouse and human DCs. Strikingly, DC expression of OX40L is redundant in a chronic intestinal Th1 response and expression by ILC3s is necessary. Collectively these data reveal tissue specific compartmentalisation of the cellular provision of OX40L and define a mechanism controlling DC expression of OX40L in vivo.
Keyphrases
- dendritic cells
- poor prognosis
- low density lipoprotein
- palliative care
- nk cells
- immune response
- endothelial cells
- stem cells
- regulatory t cells
- cell proliferation
- binding protein
- transcription factor
- long non coding rna
- climate change
- acute respiratory distress syndrome
- machine learning
- cell death
- artificial intelligence
- electronic health record
- oxidative stress
- hepatitis b virus
- intensive care unit
- deep learning
- bone marrow
- drug induced
- cell cycle arrest
- human health
- signaling pathway
- respiratory failure