Project description:We designed a long-term culture system for porcine intestinal organoids from intestinal crypt or single Lgr5+ stem cells by combining previously defined insights in the growth requirements of intestinal epithelium of human and mouse. We showed that long-term cultured swine intestinal organoids were expanded in vitro more than six months at least and maintained the potential to differentiate into different types of cells. These organoids were successfully infected with porcine enteric coronavirus including porcine epidemic diarrhea virus (PEDV) and transmissible gastroenteritis virus (TGEV). RNA-seq analysis showed that robust induction of transcripts associated with antiviral signaling in response to enteric coronavrius infection, including a number of interferon-stimulated genes and cytokines. Moreover, gene set enrichment analysis indicated that PEDV infection could suppress immune response in organoids. This 3D intestinal organoid model offers a long-term, renewable resource for investigating porcine intestinal infections with a variety of pathogens.
Project description:Porcine epidemic diarrhea (PED) is an acute, highly contagious, and high-mortality enterophilic infectious disease caused by the porcine epidemic diarrhea virus (PEDV). PEDV is globally endemic and causes substantial economic losses in the swine industry. The PEDV E protein is the smallest structural protein with high expression levels that interacts with the M protein and participates in virus assembly. However, how the host proteins interact with E proteins in PEDV replication remains unknown. We identified host proteins that interact with the PEDV E protein using a combination of PEDV E protein-labeled antibody co-immunoprecipitation and tandem liquid-chromatography mass-spectroscopy (LC-MS/MS).
Project description:Porcine epidemic diarrhea (PED), caused by porcine epidemic diarrhea virus (PEDV), is an acute and contagious enteric disease with high mortality in sucking piglets, causing huge economic losses to swine industry. In this study, we used tandem mass tag (TMT) quantitative protein analysis to investigate the proteomic changes of PK15 cells after PEDV infection, and the differential protein expression profiles were obtained at 0 h, 24 h, and 48 h after PEDV infection
Project description:The spike protein of the porcine epidemic diarrhea virus from various strains was generated from different mammalian expression systems. The integration of cryo-EM and MS delineated the glycosylation patterns on Spike proteins and also helped understand how individual glycans contribute to biological functions.
