These data indicate that unstimulated milky spots in the human greater omentum are to a great extent just a preformed specific accumulation of primarily macrophages within the stroma of the greater omentum, and therefore, cannot be regarded as true secondary lymphoid tissue. Milky spots could serve as a gateway for, as well as a provider of peritoneal macrophages when the intra-abdominal status so requires. Finally, the data from this study are compared with the data of other studies of human milky spots and those in animals.
Mesothelial cells (MC) are able to produce interleukin-8 (IL-8) after stimulation with IL-1 or tumor necrosis factor alpha. The aim of our study was to investigate whether MC are able to produce IL-8 after direct stimulation with clinically relevant bacteria. We observed a significant IL-8 response by the MC which were directly stimulated with viable staphylococci.
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