CX3CR1 and myositis disease: To understand the dynamics of CX3CR1+ MP recruitment and accumulation to the muscle in RRV-induced myositis, we infected WT mice with RRV and adoptively transferred 1 × 105 bone marrow (BM) cells (intravenously [i.v.]) from CX3CR1+/GFP fluorescent reporter mice during the early onset (4 dpi) or the acute (8 dpi) phase of RRV disease (Fig. 3C).