“…IL-6 also acts as an accessory factor promoting T cell activation, B cell differentiation, transition of haematopoietic stem cells from the G 0 to the G 1 phase of the cell cycle and maturation of megacaryocytes. Many cell types, including monocytes/macrophages, fibroblasts, endothelial and mesothelial cells, keratinocytes, B and T cells, mast cells, chondrocytes, polymorphonuclear neutrophils (PMN), some nerve cells, and a variety of tumour cell lines, were shown to produce IL-6 [2][3][4][5].…”