CXC chemokine ligand 13 (CXCL13), CC chemokine ligand 21 (CCL21), and CCL19 are constitutively expressed in secondary lymphoid organs, where they control the placement of lymphocytes and dendritic cells. However, these chemokines are also inducibly expressed in the lung after influenza infection. Here we show that, in the absence of spleen and lymph nodes, the expression of homeostatic chemokin...

Secondary lymphoid tissues such as lymph nodes are essential for the interactions between antigen presenting cells and lymphocytes that result in adaptive immune responses that protect the host against invading pathogens. The specialized architecture of these organs facilitates the cognate interactions between antigen-loaded dendritic cells and lymphocytes expressing their specific receptor as ...

MCF is defined by the recognition of characteristic lymphoid cell accumulations in non-lymphoid organs, vasculitis, and T-lymphocyte hyperplasia in lymphoid organs, and can be caused by either of two gamma-herpesviruses. The alcelaphine herpesvirus-1 (AIHV-1), the natural host of which, the wildebeest, is infected inapparently, causes the disease in cattle in regions of Africa and various rumin...

The presence of adventitial inflammation in correlation with atherosclerotic lesions has been recognized for decades. In the last years, several studies have investigated the relevance and impact of adventitial inflammation on atherogenesis. In the abdominal aorta of elderly Apoe(-/-) mice, adventitial inflammatory structures were characterized as organized ectopic lymphoid tissue, and therefor...

In about 20% of patients with rheumatoid arthritis, B and T lymphocytes recruited into the inflamed synovium are organized into complex microstructures, which resemble secondary lymphoid organs. The development of such lymphoid aggregates with germinal centers appears to contribute to the pathogenesis of the disease. Growing evidence indicates that chemokines and their receptors control the rec...

Regulatory T cells (Tregs) play a critical role in immune regulation and peripheral tolerance. While different types of Tregs have been identified both mice humans, much our understanding about how these maintain homeostasis is derived from animal models. In this study, we examined two distinct human lymphoid organs to understand repeated exposure infections at the mucosal surface influences ph...