Inflammatory monocytes carry live Mycobacteria from the lung to draining lymph nodes and acquire many characteristics of dendritic cells but fail to stimulate proliferation of CD4 T cells.
PDGFRα+ Sca-1+ bone marrow stromal/stem cells in whole bone marrow grafts can trigger the onset of autoimmune-related fibrosis in a mouse model of scleroderma.
Higher affinity for self-pMHC complexes and broader promiscuity for foreign-pMHC complexes imparts a fitness advantage within the CD4+ T cell compartment in older mice.
The T cell repertoire can display immunodominance to an epitope as a result of optimal positive selection in the thymus by one self-peptide/MHC ligand.
Dendritic cell recognition and processing of antigens from dead cells, utilising the Clec9A-damage recognition receptor, is controlled by a novel RNF41-ubiquitin-mediated regulatory pathway.
The dendritic cell actin cytoskeleton provides a platform for T cell mechanosensing, delivering novel biophysical cues that serve as costimulatory signals for T cell activation.