Cited by 982

Cell-type-specific isolation of ribosome-associated mRNA from complex tissues

Sanz, Elisenda, Yang, Linghai, Su, Thomas, Morris, David R., McKnight, G. Stanley, Amieux, Paul S.·2009·Proceedings of the National Academy of Sciences

Abstract

Gene profiling techniques allow the assay of transcripts from organs, tissues, and cells with an unprecedented level of coverage. However, most of these approaches are still limited by the fact that organs and tissues are composed of multiple cell types that are each unique in their patterns of gene expression. To identify the transcriptome from a single cell type in a complex tissue, investigators have relied upon physical methods to separate cell types or in situ hybridization and immunohistochemistry. Here, we describe a strategy to rapidly and efficiently isolate ribosome-associated mRNA transcripts from any cell type in vivo. We have created a mouse line, called RiboTag, which carries an Rpl22 allele with a floxed wild-type C-terminal exon followed by an identical C-terminal exon that has three copies of the hemagglutinin (HA) epitope inserted before the stop codon. When the RiboTag mouse is crossed to a cell-type-specific Cre recombinase-expressing mouse, Cre recombinase activates the expression of epitope-tagged ribosomal protein RPL22 ha , which is incorporated into actively translating polyribosomes. Immunoprecipitation of polysomes with a monoclonal antibody against HA yields ribosome-associated mRNA transcripts from specific cell types. We demonstrate the application of this technique in brain using neuron-specific Cre recombinase-expressing mice and in testis using a Sertoli cell Cre recombinase-expressing mouse.

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  • Genetic tagging methods such as TRAP and Ribo-tag begin to overcome obstacles of physical enrichment but are limited to the analysis of mRNA expression.

    “The recent invention of genetic tagging methods, such as TRAP (Heiman et al., 2008b) and Ribo-tag (Sanz et al., 2009), begin to overcome these obstacles, but these strategies have been limited to the analysis of mRNA expression.”

    From Cell-Type-Based Analysis of MicroRNA Profiles in the Mouse Brain (2012) · cites this paper as Sanz et al., 2009

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Authors
Sanz, E., Yang, L., Su, T., Morris, D. R., McKnight, G. S., & Amieux, P. S.
Affiliations
  • Pharmacology, University of Washington, Seattle, WA 98195
  • Departments of bBiochemistry and
Venue
Proceedings of the National Academy of Sciences
Published
2009-08-18
Volume
106
Issue
33
Pages
13939-13944
ISSN
  • 0027-8424
  • 1091-6490
Cited by
982
References
6
Language
en

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