Aim To investigate whether DCP has pro- teetive effeet on 2 ,4-dimethylnitrosamine ( DMN) -induced liver fibrosis rat model and its effect on MAPK signaling pathway.Methods Hats were intraperitoneal ly injected with DMN to establish HF model,and then were randomly divided into five groups, namely model group, colchicine group, DCP low-dose, medium-dose and high-dose groups,and control group.The rats were given DMN continuously for six weeks.Serum was col-lected afterwards to detect biochemical indexes of liver function.HE and Masson staining and immunohisto- chemical experiments were performed on liver tissues.RT-PCR was applied to detect the expression of inflammatory factors.Western blot was used to detect the ex pression of proteins related to MAPK pathway,the preventive effect of DCP on HF was observed, and its in-tervention effect on MAPK pathway was explored.Results The liver function of rats in model group was severely impaired, with obvious hepatocyte damage, inflammatory cell infiltration and increased interstitial fibrosis , suggesting that the preparation of HF model was successful.Conclusions DCP can interfere with MAPK signaling pathway to inhibit the inflammatory response and alleviate the progression of HF in rats.

In addition to the ribosome, aminoacyl-tRNA, and mRNA, translation factors are also necessary for protein synthesis.The eukaryotic translation initiation factor 5 A (eIF5A) is essential for cell viability and well conserved in all three domains during evolution.It is the only protein in eukaryotic cells that contains the unusual amino acid hypusine and the unique post-translational modification of eIF5A is strictly required for its function.eIF5A was identified in 1978 for the first time and was thought to stimulate the formation of the first peptide bond during translation initiation phase.Its involvement in the translation of polyproline-containing protein was not uncovered until 2013.With the research of over 40 years, our understanding of eIF5A function has changed dramatically.Recent ribosome profile data demonstrate that eIF5A works more generally at many ribosome stalled sites, and not limited to polyproline motif.It also enhances translation termination by facilitating peptide release.Moreover, eIF5A also indirectly regulates various cell life activities by controlling the translation of certain proteins.In this review, we provide a summary of the post-translational modification, the regulating effects during protein synthesis and autophagy as well as the relationship between eIF5A and human diseases, and explore the evolutionary conservation of eIF5A by comparing with the bacterial and arehaeal orthologs, so as to provide a theoretical basis for the research in related fields.