Presumptive lymph node organizers are differentially represented in developing mesenteric and peripheral nodes.
During murine embryogenesis, the formation of Peyer's patches (PPs) is initiated by CD45(+)CD4(+)CD3(-) lymphoid tissue inducers that trigger adhesion molecule expression and specific chemokine production from an organizing stromal cell population through ligation of the lymphotoxin-beta receptor. However, the steps involved in the development of lymph nodes (LNs) are less clear than those of PPs, and the characteristics of the organizing cells within the LN anlagen have yet to be documented....Expand abstract
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