Over the years, people have been committed to study T1D pathogenesis and prevention methods and gradually realized that the ultimate goal for function reconstruction of endogenous islet bcells is to find interventions such as antigen-specific ones, antibody-dependent ones, immunosuppressive agents, cytokines, etc, to protect islet b-cells. But the outcomes of clinical applications of these interventions are not satisfactory, mainly due to low maximum dosage caused by side effects and the complexity of the pathogenesis of T1D. According to the characteristics of T1D at different stages, selecting appropriate combined application could, on the one hand, reduce the toxic side effects, on the other hand, achieve synergistic and complementary effects at the aspects of pathways and mechanisms. Based on this theory, we explored the effects of application of both intervention reagents IL-10 and IGF-1, and observed their protective effects on pancreatic b-cells of NOD mice at onset of T1D.  Acts as a growth factor to regulate cell growth, survival and metabolism, C-peptide secretion, insulin sensitivity and immune responses. The parasites in vitro and recognized the parasitic AMA1, as shown by Western Blotting, immunofluorescence analysis and immunohistochemistry analysis.

In our study, both qRT-PCR and Western Blotting demonstrated that the newly identified EtAMA1 was constitutively expressed in all four developmental stages. Proteomic comparison of E. tenella showed EtAMA1 was found in sporozoites and EtAMA2 was found in merozoites. As Western Blotting analysis of second-generation merozoites showed EtAMA1 expression was little in soluble proteins, high in membrance proteins, soluble proteomic analysis of merozoites might miss the menbrance EtAMA1. There was one conflicting data for RNA versus protein levels of EtAMA1 expression in sporulated oocysts. As we know, oocysts of Eimeria spp. are able to persist in the environment for years by oxidation of lipids supporting the metabolism in sporulated oocysts during dormancy. So we thought even EtAMA1 transcripts were moderately expressed, EtAMA1 protein could remain a high expression in sporulated oocysts. AMA1 has been an essential protein in apicomplexan invasion, which can be identified in invasive zoites. qRT-PCR and Western Blotting analysis showed EtAMA1 was high expressed in sporozoites.

Invasion inhibition assays revealed that rabbit antiserum against recombinant EtAMA1 blocked invasion of host cells by approximately 70%. Localization of EtAMA1 in DF-1 cells or in chicken ceca showed that the expression of EtAMA1 on the sporozoite surface increased when the parasites invaded the cells. These data therefore supported a more direct role for EtAMA1 in host invasion. In the localization of EtAMA1, we observed the protein was not only found at the apical end, but also in the entire surface of the parasite even during invasion, which could also observed in Toxoplasma parasites. Later during the parasite development in DF-1 cells, EtAMA1 was found on the merozoite surface and in the PV membrane. The PV is a crucial structure that protects the parasite against the antagonistic environment of the host cell. When merozoites escape from mature schizonts to invade new host cells, they must pass through the PV membrane.