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Amy H Lin, Christopher G Twitty, Ryan Burnett, Andrew Hofacre, Leah A Mitchell, Fernando Lopez Espinoza, Harry E Gruber, Douglas J Jolly
Tumor cells express a number of immunosuppressive molecules that can suppress anti-tumor immune responses. Efficient delivery of small interfering RNAs to treat a wide range of diseases including cancers remains a challenge. Retroviral replicating vectors (RRV) can be used to stably and selectively introduce genetic material into cancer cells. Here, we designed RRV to express shRNA (RRV-shPDL1) or microRNA30-derived shRNA (RRV-miRPDL1) using Pol II or Pol III promoters to downregulate PDL1 in human cancer cells...
March 17, 2017: Molecular Therapy. Nucleic Acids
Christina E Khodr, Amanda Becerra, Ye Han, Martha C Bohn
BACKGROUND: Alpha-synuclein (SNCA) downregulation shows therapeutic potential for synucleinopathies, including Parkinson's disease (PD). Previously we showed that human (h)SNCA gene silencing using a short hairpin (sh)RNA in rat substantia nigra (SN) protects against a hSNCA-induced forelimb deficit, but not dopamine (DA) neuron loss. Furthermore, the shRNA increases cell death in vitro, but the same target sequence embedded in a microRNA30 transcript (mir30-hSNCA) does not. OBJECTIVE: Examine hSNCA gene silencing using mir30-hSNCA in vivo...
March 6, 2014: Brain Research
Raman M Das, Nick J Van Hateren, Gareth R Howell, Elizabeth R Farrell, Fiona K Bangs, Victoria C Porteous, Elizabeth M Manning, Michael J McGrew, Kyoji Ohyama, Melanie A Sacco, Pam A Halley, Helen M Sang, Kate G Storey, Marysia Placzek, Cheryll Tickle, Venugopal K Nair, Stuart A Wilson
RNA interference (RNAi) provides an effective method to silence gene expression and investigate gene function. However, RNAi tools for the chicken embryo have largely been adapted from vectors designed for mammalian cells. Here we present plasmid and retroviral RNAi vectors specifically designed for optimal gene silencing in chicken cells. The vectors use a chicken U6 promoter to express RNAs modelled on microRNA30, which are embedded within chicken microRNA operon sequences to ensure optimal Drosha and Dicer processing of transcripts...
June 15, 2006: Developmental Biology
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