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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Animals, Apoptosis, Blotting, Western, Bone Marrow Cells, DNA-Binding Proteins, Dendritic Cells, Flow Cytometry, Gene Silencing, Genetic Vectors, Interleukin-10, Interleukin-12, Lentivirus, Lymphocyte Culture Test, Mixed, Membrane Proteins, Mice, Mice, Inbred C57BL, NF-kappa B, RNA, Small Interfering, Real-Time Polymerase Chain Reaction, Th1 Cells, Th2 Cells, Transcription Factor RelB.
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Does lentiviral-mediated shRNA against RelB induce the generation of tolerogenic dendritic cells? Context: Lentiviral-mediated shRNA against RelB was used to produce tolerogenic dendritic cells from murine bone marrow derived dendritic cells (BMDCs). RelB expression in the BMDCs was silenced by lentivirus carrying RelB shRNA. The apoptosis rate and surface markers of DCs were assessed by flow cytometry. IL-12,IL-10,TGF-β1 secreted by DCs and DNA binding capacity of NF-κB subunits in the nucleus were measured by ELISA, independently. MLR was used to analyze the capacity of DCs to inhibit immune response. RelB expression was significantly inhibited in DCs following lentiviral mediated delivery of RelB specific shRNA. The RelB shRNA-DC produced lower IL-12 and higher IL-10 than mature dendritic cells (mDCs) and silencing control DCs. There was no difference in the apoptosis rate between shRNA RelB-DCs and mDCs. The expression levels of co-stimulatory molecules (CD80, CD86 and CD83) and MHC-II class molecule were lower in the RelB shRNA-DCs than in the mDCs and silencing control DCs. In addition, RelB shRNA also inhibited the RelB DNA binding capacity but had no effect on other NF-κB subunits. The shRNA RelB-DCs can significantly inhibit mixed lymphocyte reaction (MLR) and down-regulate Th1 cytokines and prompt the production of Th2 cytokines.
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Our results indicate RelB shRNA transfection of DCs can induce the immature status, and produce tolerogenic DCs. Final Decision: yes