The mechanism underlying the selective upregulated cytokine production by allo- vs. isografts is unclear but it is possible that these influences may stem from the signaling networks mediated by many immune cell types, including microglia, and infiltrating lymphocytes such as T cells, NK and/or NK-T cells.
Toll-like receptors (TLRs) mediate many of these functions in immune cell types, and TLR agonists, thus, are currently primary candidate molecules to be used as important adjuvants in a variety of cancers.
B cells also mediate many other functions essential for immune homeostasis.
They act by engulfing the bacilli, producing proteolytic enzymes, presenting mycobacterial antigens to T cells and producing a characteristic pattern of cytokines that regulate the immune system and mediate many of clinical manifestations of TB [ 16].
PGE2 appearing at this sub-mucosal level is a product of arachidonic acid metabolism mediated by type-2 cyclooxygenase (COX-2) situated on the membrane of many immune cells.
PGE2s appear at this intestinal submucosal level from the metabolism of arachidonic acid mediated by type-2 cyclooxygenases (COX2s) situated in the membranes of many immune cells.
In fact, many immune effects attributed to E2 in monocytes and macrophages are thought to be mediated through ERα and not ERβ [36], [37], [38], [39].
Many immune responses, however, involve both mechanisms.
Dopamine mediates many physiological processes in plants.
These recruited T cells remain in skin for long periods of time, and can mediate recall immune memory responses many months after their initial recruitment.
