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Updated: Sep 28, 2026

Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
Published on: April 16, 2015
Cutting edge: distal regulatory elements are required to achieve selective expression of IFN-gamma in Th1/Tc1
Mohammed Soutto1, Weisong Zhou, Thomas M Aune
1Division of Rheumatology, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.
Abstract:
Using a transgenic approach, we analyzed the contribution of introns located within the IFN-gamma gene and distal regulatory regions to IFN-gamma gene expression. Intron 1 and 3 from the IFN-gamma gene displayed strong enhancer activity. This activity appeared to be dependent upon integration into the genome but resulted in a loss of Th1 selectivity. We also found that distal regulatory elements are not required for high level expression of the human IFN-gamma gene, but rather for cell lineage-specific expression. An 8.6-kb human IFN-gamma transgene was sufficient to yield high level expression but a 191-kb IFN-gamma transgene with approximately 90 kb of flanking 5' and 3' sequence was necessary to achieve both high level and Th1 selective expression of human IFN-gamma.
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