Validation of efficient high-throughput plasmid and siRNA transfection of human monocyte-derived dendritic cells without cell maturation
| Autor: | Hanna Pincas, Stuart C. Sealfon, Sonali Patil, Robert N. Bowles |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Small interfering RNA
Green Fluorescent Proteins Immunology Newcastle disease virus Gene Expression chemical and pharmacologic phenomena Nucleofection Biology Transfection Monocytes Article DEAD-box RNA Helicases RNA interference Gene Knockdown Techniques Humans Immunology and Allergy RNA Small Interfering Receptors Immunologic Gene knockdown Histocompatibility Antigens Class II Dendritic Cells Interferon-beta Dendritic cell Flow Cytometry Molecular biology DEAD Box Protein 58 RNA Interference B7-2 Antigen Cell activation Plasmids |
| Zdroj: | Journal of Immunological Methods. 363:21-28 |
| ISSN: | 0022-1759 |
| DOI: | 10.1016/j.jim.2010.09.028 |
| Popis: | Transfection of primary immune cells is difficult to achieve at high efficiency and without cell activation and maturation. Dendritic cells (DCs) represent a key link between the innate and adaptive immune systems. Delineating the signaling pathways involved in the activation of human primary DCs and reverse engineering cellular inflammatory pathways have been challenging tasks. We optimized and validated an effective high-throughput transfection protocol, allowing us to transiently express DNA in naïve primary DCs, as well as investigate the effect of gene silencing by RNA interference. Using a high-throughput nucleofection system, monocyte-derived DCs were nucleoporated with a plasmid expressing green fluorescent protein (GFP), and transfection efficiency was determined by flow cytometry, based on GFP expression. To evaluate the effect of nucleoporation on DC maturation, the expression of cell surface markers CD86 and MHCII in GFP-positive cells was analyzed by flow cytometry. We established optimal assay conditions with a cell viability reaching 70%, a transfection efficiency of over 50%, and unchanged CD86 and MHCII expression. We examined the impact of small interfering RNA (siRNA)-mediated knockdown of RIG-I, a key viral recognition receptor, on the induction of the interferon (IFN) response in DCs infected with Newcastle disease virus. RIG-I protein was undetectable by Western blot in siRNA-treated cells. RIG-I knockdown caused a 75% reduction in the induction of IFN-β mRNA compared with the negative control siRNA. This protocol should be a valuable tool for probing the immune response pathways activated in human DCs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect