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A focused Real Time PCR strategy to determine GILZ expression in mouse tissues
Luigi Cari1, Erika Ricci1, Marco Gentili1
1Department of Medicine, Section of Pharmacology, University of Perugia Medical School, P.le L. Severi 1, 06132 Perugia, Italy.
Results in Immunology
|December 24, 2015
Summary
Specific primers accurately quantify Glucocorticoid-Induced Leucine Zipper (GILZ) and L-GILZ gene expression in mice. This method avoids pseudogene amplification, revealing distinct roles for GILZ isoforms in various tissues.
Area of Science:
- Molecular Biology
- Immunology
- Gene Expression Analysis
Background:
- Glucocorticoid-Induced Leucine Zipper (GILZ) is a key mediator of glucocorticoid anti-inflammatory actions.
- GILZ and its isoform L-GILZ are expressed in various immune and epithelial cells, upregulated by glucocorticoids.
- Accurate quantitative analysis of GILZ expression in mouse tissues is challenging due to a homologous pseudogene and related TSC22 family genes.
Purpose of the Study:
- To develop specific primer pairs for accurate quantitative Real Time PCR (qRT-PCR) of GILZ and L-GILZ.
- To differentiate GILZ and L-GILZ expression from pseudogenes and TSC22 family members.
- To investigate the differential expression and glucocorticoid-induced regulation of GILZ and L-GILZ in mouse tissues.
Main Methods:
- Design and validation of specific primer pairs for GILZ and L-GILZ using Real Time PCR.
- Quantitative analysis of GILZ and L-GILZ expression in untreated and dexamethasone-treated mouse tissues (in vivo and in vitro).
- Comparison of expression patterns between GILZ and L-GILZ, and assessment of primer specificity against pseudogenes and related genes.
Main Results:
- Developed specific primers that successfully amplify GILZ and L-GILZ without detecting the GILZ pseudogene or TSC22d1iso3.
- Confirmed that glucocorticoids upregulate both GILZ and L-GILZ expression.
- Demonstrated differential expression patterns of GILZ and L-GILZ across various mouse tissues, suggesting distinct cellular functions.
- GILZ exhibited higher sensitivity to glucocorticoid induction compared to L-GILZ.
Conclusions:
- The developed primer sets enable precise quantification of GILZ and L-GILZ expression, overcoming previous technical limitations.
- The distinct expression profiles of GILZ and L-GILZ support their unique roles in specific cell types and tissues.
- This quantitative method provides a reliable tool for studying GILZ function in mice and has potential for human applications.
