Project description:This experiment was performed to help optimize a digestion protocol for FACS of adult mouse lung cells. The sample JH2 was used to help generate lung epithelial cell signatures.
Project description:Gene expression profiling was used to identify genes that display radiation-induced transcriptional change over mouse strain and tissue differences. Keywords: mouse strain comparison, irradiation, time course, lung, skin
Project description:Early life establishment of tolerance to commensal bacteria at barrier surfaces carries enduring implications for immune health but remains poorly understood. Here we show that this process is controlled by microbial interaction with a specialized subset of antigen presenting cells. More particularly, we identify CD301b+ type 2 conventional dendritic cells (DC) as a subset in neonatal skin specifically capable of uptake, presentation and generation of regulatory T cells (Tregs) to commensal antigens. In early life, CD301b+ DC2 are enriched for programs of phagocytosis and maturation, while also expressing tolerogenic markers. In both human and murine skin, these signatures were reinforced by microbial uptake. In contrast to their adult counterparts or other early life DC subsets, neonatal CD301b+ DC2 highly expressed the retinoic acid-producing enzyme, RALDH2, deletion of which limited commensal-specific Tregs. Thus, synergistic interactions between bacteria and a specialized DC subset critically support early life tolerance at the cutaneous interface.
Project description:Antigen presenting cells (APC) are a heterogenous population, comprised of macrophages/monocytes (CD14+ cells), classical dendritic cells (CD141+DC and CD1c+ DC) and pDC. Upon stimulation, APC migrate from peripheral organs to lymph nodes, where they drive T cell specific lineage fate, that is towards immune activation or suppression. APC in human tissues remain poorly defined. Through our previous published data we have charactised APC within adult skin and blood. Here we extend these findings, by increasing the sample for skin CD14+ DC and CD1c+ DC and performing gene array analysis of adult spleen CD14+ DC, CD141+DC and CD1c+ DC. Once, we were confident we could clearly distinguish our populations (CD14+ cell, CD141+ DC and CD1c+ DC) of interest from other cells, we sorted FACS purified the cells and prepared them for gene array analysis. Through generating subset specific gene signatures and comparing CMAP scores we confirmed we had identified equivalent APC subsets across human adult skin and spleen.
Project description:To investigate changes in immune cell signatures in the transcriptomes of DLE lesional skin versus normal skin Comparison of the transcriptome of DLE lesional skin with normal skin
