Primary human fibroblasts were a gift from M. Boehm (National Cancer Institute, Bethesda, MD). Primary human keratinocytes were collected and cultured as previously described (69 (link)). Ninety-six–well plate scratch cultures using fibroblasts were coated overnight with rat tail collagen (Roche, Basel, Switzerland) at 4°C. Dendritic cells were cultured and stimulated as previously described (70 (link), 71 (link)). Human epithelial follicle stem cells were purchased from Celprogen (Torrance, CA) and cultured under manufacturer’s recommendations. Epithelial stem cells were stimulated in an identical manner to fibroblast and keratinocyte cultures. Scratch assay for both keratinocytes and fibroblasts were performed as previously described (30 (link)) using a multiplicity of infection of 1 for all experiments.