Abstract
RORγt+ innate lymphoid cells are crucial players of innate immune responses and represent a major source of interleukin-22 (IL-22), which has an important role in mucosal homeostasis. The signals required by RORγt+ ILCs to express IL-22 and other cytokines have been elucidated only partially. Here we showed that RORγt+ ILCs can directly sense the environment by the engagement of the activating receptor NKp44. NKp44 triggering in RORγt+ ILCs selectively activated a coordinated proinflammatory program, including tumor necrosis factor (TNF), whereas cytokine stimulation preferentially induced IL-22 expression. However, combined engagement of NKp44 and cytokine receptors resulted in a strong synergistic effect. These data support the concept that NKp44+ RORγt+ ILCs can be activated without cytokines and are able to switch between IL-22 or TNF production, depending on the triggering stimulus.
| Original language | American English |
|---|---|
| Pages (from-to) | 1223-1235 |
| Number of pages | 13 |
| Journal | Immunity |
| Volume | 38 |
| Issue number | 6 |
| DOIs | |
| State | Published - 27 Jun 2013 |
All Science Journal Classification (ASJC) codes
- Immunology and Allergy
- Immunology
- Infectious Diseases