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© Research
Publication : The Journal of investigative dermatology

Tetracycline-regulated transactivators driven by the involucrin promoter to achieve epidermal conditional gene expression

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of investigative dermatology - 01 Aug 2004

Jaubert J, Patel S, Cheng J, Segre JA

Link to Pubmed [PMID] – 15245431

J. Invest. Dermatol. 2004 Aug;123(2):313-8

To achieve conditional gene expression in the differentiated layers of the epidermis, we generated transgenic mice with the tetracycline-regulated transactivator proteins, tTA (tetracycline transactivator) and rtTA (reverse tetracycline transactivator), expressed from the human involucrin promoter. Interaction with tetracycline turns off or turns on the tTA and rtTA molecules, respectively, allowing for regulation of downstream target genes during development and postnatally. These transactivator lines were crossed with reporter mice driving LacZ expression from a tetracycline response element to analyze the specificity and levels of target gene expression. Quantitative beta-galactosidase experiments demonstrate a 30-fold induction, specific to epithelial tissues. Immunohistochemistry results illustrate that the beta-galactosidase staining follows that of endogenous involucrin expression. Induction initiates at embryonic day 14.5 with expression over the entire epidermal surface by E16.5. Together with other driver lines, expressing tetracycline transactivators in the mitotically active layers of the epidermis, these mice will allow investigators to specifically modulate expression of target genes to specific stages of epidermal differentiation.

http://www.ncbi.nlm.nih.gov/pubmed/15245431