文摘
Interleukin-22 (IL-22) belongs to IL-10 cytokine family which was initially described as a T helper 1 (Th1) and 17 (Th17) cytokine. Subsequently, numerous other sources were identified. The liver is often described as an immunological organ due to its particular contain in a large spectrum of immune cells of which certain subsets produce IL-22. In liver, expression of IL-22 receptor subunit-1 (IL-22R1), is restricted to hepatocytes, hepatic stellate cells, and liver progenitor cells which are involved in several hepatic diseases. IL-22 is known to play protective roles mainly through signal transducer of activator of transcription-3 (STAT3)-dependant signaling pathways. However, possible deleterious effects of IL-22 at specific stages along with the progression of the diseases and according to the etiology were reported. This review summarizes the current understandings of both beneficial and deleterious facets of IL-22 in liver diseases and discusses its putative targeting as a strategy for further clinical trials. Keywords Interleukin 22 IL-22R1 Hepatocytes HSCs LPCs Liver diseases