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Published on: January 12, 2020
Regulation of SET Gene Expression by NFkB
Yi Feng1, Xiaoyong Li1, Weitao Zhou1
1Chongqing City Key Lab of Translational Medical Research in Cognitive Development and Learning and Memory Disorders and Ministry of Education Key Lab of Child Development and Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China.
Nuclear factor kappa B (NFkB) regulates the SET gene, which is implicated in Alzheimer's disease (AD) and Down syndrome (DS) tau pathology. This finding sheds light on how inflammatory responses may contribute to AD pathogenesis.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- SET protein is elevated and mislocalized in neurons in Alzheimer's disease (AD) and Down syndrome (DS) brains.
- Cytoplasmic SET inhibits protein phosphatase 2A, contributing to tau pathology in AD.
Purpose of the Study:
- To investigate the regulatory mechanisms of human SET gene expression.
- To identify cis-acting elements and transcription factors involved in SET gene regulation.
Main Methods:
- Cloning and sequencing of the SET gene's 5' flanking region.
- Bioinformatic analysis to identify putative regulatory elements (NFkB, Sp1, HSE).
- Luciferase assay and electrophoretic mobility shift assay (EMSA) to validate NFkB-responsive elements.
Main Results:
- Identified a functional NFkB-responsive element in the SET gene promoter.
- Demonstrated that NFkB upregulates SET isoform 1 transcription, but not isoform 2.
- Showed differential regulation between SET isoforms.
Conclusions:
- NFkB plays a crucial role in regulating human SET gene expression.
- Oxidative stress and inflammation may lead to abnormal SET gene expression, contributing to tauopathy in AD.
- Findings provide insights into the molecular mechanisms underlying AD pathogenesis.
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