Expression of Janus kinase 3 in human endothelial and other non-lymphoid and non-myeloid cells

The role of Jak3 in lymphoid development, activation, and signaling

Mutations in a number of lymphoid signaling molecules lead to immunodeficiencies in mice and humans. Among these, one very pleiotropic syndrome results from deficiencies in an array of cytokine signaling pathways utilizing a cytokine receptor common gamma chain, gammac, and the tyrosine kinase Jak3. Recent advances in our understanding of the role of gammac and Jak3 in lymphocyte development and function highlight the importance of cytokine receptor signaling pathways in regulating lymphoid homeostasis and responsiveness.

Early activation signals in endothelial cells. Stimulation by cytokines

With limitation to the "proinflammatory program" induced in endothelial cells by exposure to interleukin-1, tumor necrosis factor, and interleukin-6, we review the available data on the signaling for these three cytokines, from receptor engagement to induction of gene transcription. Only a few molecular pathways have been characterized so far, and key issues in endothelial biology, such as endothelial specificity of gene expression and heterogeneity of different endothelial populations, remain largely unexplored.