Dissecting the phenotypic and functional heterogeneity of mouse inflammatory osteoclasts by the expression of Cx3cr1
- Others:
- Laboratoire de PhysioMédecine Moléculaire (LP2M) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)
- Universidad Cardenal Herrera-CEU (CEU-UCH)
- National Cancer Institute [Bethesda] (NCI-NIH) ; National Institutes of Health [Bethesda] (NIH)
- Infection et inflammation (2I) ; Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut National de la Santé et de la Recherche Médicale (INSERM)
- Cellules Souches, Plasticité Cellulaire, Médecine Régénératrice et Immunothérapies (IRMB) ; Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM)
- Hôpital Ambroise Paré [AP-HP]
Description
Bone destruction relies on interactions between bone and immune cells. Boneresorbing osteoclasts (OCLs) were recently identified as innate immune cells activating T cells toward tolerance or inflammation. Thus, pathological bone destruction not only relies on increased osteoclast differentiation, but also on the presence of inflammatory OCLs (i-OCLs), part of which express Cx3cr1. Here, we investigated the contribution of mouse Cx3cr1 + and Cx3cr1 neg i-OCLs to bone loss. We showed that Cx3cr1 + and Cx3cr1 neg i-OCLs differ considerably in transcriptional and functional aspects. Cx3cr1 neg i-OCLs have a high ability to resorb bone and activate inflammatory CD4 + T cells. Although Cx3cr1 + i-OCLs are associated with inflammation, they resorb less and have in vitro an immune-suppressive effect on Cx3cr1 neg i-OCLs, mediated by PD-L1. Our results provide new insights into i-OCL heterogeneity. They also reveal that different i-OCL subsets may interact to regulate inflammation. This contributes to a better understanding and prevention of inflammatory bone destruction.
Abstract
International audience
Additional details
- URL
- https://hal.archives-ouvertes.fr/hal-03048183
- URN
- urn:oai:HAL:hal-03048183v1
- Origin repository
- UNICA