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Development Of Two Distinct Dendritic-Like Apcs In The Context Of Splenic Stroma, Pravin Periasamy, Sawang Petvises, Helen O'Neill
Development Of Two Distinct Dendritic-Like Apcs In The Context Of Splenic Stroma, Pravin Periasamy, Sawang Petvises, Helen O'Neill
Helen O'Neill
Murine splenic stroma has been found to provide an in vitro niche for hematopoiesis of dendritic-like APC. Two distinct cell types have been characterized. The novel "L-DC" subset has cross-presenting capacity, leading to activation of CD8+ T cells, but not activating CD4+ T cells, which is consistent with their CD11cloCD11bhiMHC-II- phenotype. For L-DC, an equivalent tissue-specific APC has been found only in spleen. A second population of CD11chiCD11bloMHC-II+ cells resembling conventional dendritic cells (cDC) can activate both CD4 and CD8 T cells. Production of L-DC but not cDC-like cells is now shown to be dependent on contact between the L-DC …
Stroma-Dependent Development Of Two Dendritic-Like Cells Types With Distinct Antigen Presenting Capability, Pravin Periasamy, Helen O'Neill
Stroma-Dependent Development Of Two Dendritic-Like Cells Types With Distinct Antigen Presenting Capability, Pravin Periasamy, Helen O'Neill
Helen O'Neill
Dendritic cells (DC) represent a heterogeneous class of antigen presenting cells (APC). Previously we reported a distinct myeloid dendritic-like cell present in spleen, as an in vivo counterpart to cells produced in murine spleen long-term cultures (LTC-DC). These cells, named 'L-DC', were found to be functionally and phenotypically distinct from conventional (c)DC, plasmacytoid (p)DC and monocytes. These results suggested that spleen may represent a niche for development of L-DC from endogenous progenitors. Adult murine spleen has now been investigated for the presence of L-DC progenitors. Lineage-negative (Lin)-ckitlo and Lin-ckithi progenitor subsets were identified as candidate populations, and tested for ability …
Distinct Progenitor Origin Distinguishes A Lineage Of Dendritic-Like Cells In Spleen., Sawang Petvises, Helen O'Neill
Distinct Progenitor Origin Distinguishes A Lineage Of Dendritic-Like Cells In Spleen., Sawang Petvises, Helen O'Neill
Helen O'Neill
The dendritic cell (DC) compartment comprises subsets of cells with distinct phenotypes. Previously this lab reported methodology for hematopoiesis of dendritic-like cells in vitro dependent on a murine splenic stromal cell line (5G3). Co-cultures of lineage-depleted bone marrow (Lin- BM) over 5G3 continuously produced a distinct population of dendritic-like "L-DC" for up to 35 days. Here the progenitor of L-DC is investigated in relation to known BM-derived hematopoietic progenitors. It is shown here that L-DC-like cells also derive from the CD150+Flt3- long-term reconstituting-hematopoietic stem cells (HSC), and also from the Flt3+ multipotential progenitor subset in BM. Lin- BM co-cultures also …
Investigation Into The Prevalence Of A Novel Dendritic-Like Cell Subset In Vivo, Kristin Griffiths, Jonathan Tan, Helen O'Neill
Investigation Into The Prevalence Of A Novel Dendritic-Like Cell Subset In Vivo, Kristin Griffiths, Jonathan Tan, Helen O'Neill
Helen O'Neill
A novel dendritic-like cell subset termed L-DC was recently identified in murine spleen based on marker expression of a homogeneous cell population derived from long-term culture of neonatal spleen. The function of L-DC is distinct from other splenic dendritic and myeloid cell subsets because of their high endocytic capacity and their ability to cross-present antigen to CD8+ T cells. This paper shows the subset to be unique to spleen and blood, with a similar, but possibly functionally distinct subset also present in bone marrow. The prevalence of the subset is low; ~6% of all dendritic and myeloid cells in the …
Investigation Into The Prevalence Of A Novel Dendritic-Like Cell Subset In Vivo, Kristin Griffiths, Jonathan Tan, Helen O'Neill
Investigation Into The Prevalence Of A Novel Dendritic-Like Cell Subset In Vivo, Kristin Griffiths, Jonathan Tan, Helen O'Neill
Jonathan Tan
A novel dendritic-like cell subset termed L-DC was recently identified in murine spleen based on marker expression of a homogeneous cell population derived from long-term culture of neonatal spleen. The function of L-DC is distinct from other splenic dendritic and myeloid cell subsets because of their high endocytic capacity and their ability to cross-present antigen to CD8+ T cells. This paper shows the subset to be unique to spleen and blood, with a similar, but possibly functionally distinct subset also present in bone marrow. The prevalence of the subset is low; ~6% of all dendritic and myeloid cells in the …