Effect of different types of macrophages on hepatic fibrosis in Echinococcus Granulosus mice

Abstract Objective The purpose of this study is to illustrate the therapeutic effect of which kind of polarized macrophages-based cell therapy in hepatic fibrosis caused by cystic echinococcosis. Methods The isolation culture and polarization induction of mouse bone marrow-derived macrophages (BMDM) are established in an in vitro environment. A model of Echinococcus granulosus infection is established by direct injection of the Echinococcus granulosus suspension into the left hepatic lobe. The macrophages are labeled in vitro and the localization of the returned macrophages in the liver of the mice is determined by in vivo tracing. Macrophages of different polarization types are injected into the successfully modeled mice through the tail vein, and the results of HE, Masson, Sirius Red, Desmin immunohistochemistry and Hyp content are inspected to evaluate by liver tissue. Liver pathology and changes in the degree of fibrosis. Results Bone marrow-derived macrophages have been successfully obtained and induced into M1 and M2 macrophages by different conditions; a model of Echinococcus granulosus infection was successfully established. Macrophages labeled in vitro were returned to the model through the tail vein and they can be located in the liver; a variety of experimental results show that compared with the PBS group, the degree of fibrosis in the M0 group and the M1 group have been reduced, with statistical difference, and the M1 is better than M0 in terms of the therapeutic effect. There is no significant change in the degree of fibrosis in the M2 group. Conclusion Both M1 and M0 macrophages can alleviate liver fibrosis caused by persistent infection of Echinococcus granulosus, but the treatment effect of M1 macrophages is more significant. Cell therapy based on M1 macrophages may be a new idea for treating liver fibrosis caused by persistent infection of Echinococcus granulosus.