Abstract:
:Transcriptional profiling is a powerful approach for understanding development and disease. Current cell type-specific RNA purification methods have limitations, including cell dissociation trauma or inability to identify all RNA species. Here, we describe "mouse thiouracil (TU) tagging," a genetic and chemical intersectional method for covalent labeling and purification of cell type-specific RNA in vivo. Cre-induced expression of uracil phosphoribosyltransferase (UPRT) provides spatial specificity; injection of 4-thiouracil (4TU) provides temporal specificity. Only UPRT(+) cells exposed to 4TU produce thio-RNA, which is then purified for RNA sequencing (RNA-seq). This method can purify transcripts from spatially complex and rare (<5%) cells, such as Tie2:Cre(+) brain endothelia/microglia (76% validated by expression pattern), or temporally dynamic transcripts, such as those acutely induced by lipopolysaccharide (LPS) injection. Moreover, generating chimeric mice via UPRT(+) bone marrow transplants identifies immune versus niche spleen RNA. TU tagging provides a novel method for identifying actively transcribed genes in specific cells at specific times within intact mice.
journal_name
Genes Devjournal_title
Genes & developmentauthors
Gay L,Miller MR,Ventura PB,Devasthali V,Vue Z,Thompson HL,Temple S,Zong H,Cleary MD,Stankunas K,Doe CQdoi
10.1101/gad.205278.112subject
Has Abstractpub_date
2013-01-01 00:00:00pages
98-115issue
1eissn
0890-9369issn
1549-5477pii
27/1/98journal_volume
27pub_type
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