A well-oiled IaaS machine — where servers and prefab packages effectively take the place of IT professionals — should deliver 100 percent uptime. Basic SLAs should provide, at minimum, “semi-managed services.” That is, the IaaS vendor should manage technology from the hosting environment up to the operating system including every jot and tiddle concerning patient privacy and data security. Healthcare providers can be as involved in the application install and management as they choose to be, or request concierge- level service.
Naturally arising regulatory T (Treg) cells express the transcription factor FoxP3, which critically controls the development and function of Treg cells. FoxP3 interacts with another transcription factor Runx1 (also known as AML1). Here, we showed that Treg cell-specific deficiency of Cbfbeta, a cofactor for all Runx proteins, or that of Runx1, but not Runx3, induced lymphoproliferation, autoimmune disease, and hyperproduction of IgE. Cbfb-deleted Treg cells exhibited impaired suppressive function in vitro and in vivo, with altered gene expression profiles including attenuated expression of FoxP3 and high expression of interleukin-4. The Runx complex bound to more than 3000 gene loci in Treg cells, including the Foxp3 regulatory regions and the Il4 silencer. In addition, knockdown of RUNX1 showed that RUNX1 is required for the optimal regulation of FoxP3 expression in human T cells. Taken together, our results indicate that the Runx1-Cbfbeta heterodimer is indispensable for in vivo Treg cell function, in particular, suppressive activity and optimal expression of FoxP3.
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From the Hardcover edition.