Journal
JOURNAL OF IMMUNOLOGY
Volume 169, Issue 10, Pages 5754-5760Publisher
AMER ASSOC IMMUNOLOGISTS
DOI: 10.4049/jimmunol.169.10.5754
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Funding
- NCI NIH HHS [P01 CA 42063] Funding Source: Medline
- NIGMS NIH HHS [R37 GM 34277] Funding Source: Medline
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Introduction of small interfering RNAs (siRNAs) into a cell can cause a specific interference of gene expression known as RNA interference (RNAi). However, RNAi activity in lymphocytes and in normal primary mammalian cells has not been thoroughly demonstrated. In this report, we show that siRNAs complementary to CD4 and CD8alpha specifically reduce surface expression of these coreceptors and their respective mRNA in a thymoma cell line model. We show that RNAi, activity is only caused by a subset of siRNAs complementary to the mRNA target and that ineffective siRNAs can compete with effective siRNAs. Using primary differentiated T lymphocytes, we provide the first evidence of siRNA-mediated RNAi gene silencing in normal nontransformed somatic mammalian lymphocytes.
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