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The use of whole‐mount in situ hybridization to illustrate gene expression regulation
Author(s) -
Llamusí Beatriz,
MuñozSoriano Verónica,
Paricio Nuria,
Artero Rubén
Publication year - 2014
Publication title -
biochemistry and molecular biology education
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.34
H-Index - 39
eISSN - 1539-3429
pISSN - 1470-8175
DOI - 10.1002/bmb.20807
Subject(s) - biology , in situ hybridization , enhancer , gene expression , gene , computational biology , in situ , reporter gene , genetics , ultrabithorax , microbiology and biotechnology , chemistry , organic chemistry , homeotic gene
In situ hybridization is a widely used technique for studying gene expression. Here, we describe two experiments addressed to postgraduate genetics students in which the effect of transcription factors on gene expression is analyzed in Drosophila embryos of different genotypes by whole‐mount in situ hybridization. In one of the experiments, students analyzed the repressive effect of Snail over rhomboid expression using reporter lines containing different constructs of the rhomboid neuroectodermal enhancer fused to the lacZ gene. In the second experiment, the epistatic relationship between the cabut and decapentaplegic genes was analyzed. These simple experiments allowed students to (1) understand the role of transcription factors and cis ‐regulatory elements over gene expression regulation and (2) practice a widespread laboratory technique, in situ hybridization with nonradioactive labeled probes, to detect gene expression patterns. These experiments required 12 hr and were organized into four daily sessions that included the discussion of the results with students. Examples of the results obtained and their relevance are shown and discussed herein. The methods described in these laboratory exercises can be easily adapted to model organisms other than Drosophila . © 2014 by The International Union of Biochemistry and Molecular Biology, 42(4):339–347, 2014.