HRE-Luciferase Plasmid is a transcriptional reporter construct used to monitor activation of hypoxia-inducible factor (HIF) signaling pathways. The plasmid contains hypoxia response element (HRE) sequences located upstream of a promoter that regulates expression of a luciferase reporter gene. Under reduced oxygen conditions, HIF transcription factors can bind to the HRE sequences and promote transcription of the luciferase gene. Luciferase expression can then be measured using standard luciferase assay reagents that produce a luminescent signal in the presence of luciferin substrate.

This reporter system is commonly used in cell-based assays to evaluate HIF-dependent transcription and to study cellular responses to hypoxic conditions. Changes in luminescence intensity reflect changes in transcriptional activity associated with HRE-mediated gene regulation.