TCF/LEF Reporter Lentivirus

Background

TCF/LEF transcription factors, including TCF7, LEF1, and TCF7L2, are the nuclear effectors of the canonical Wnt signaling pathway. In the absence of Wnt ligand, beta-catenin is continuously degraded and TCF/LEF factors repress target genes. When Wnt signaling is active, beta-catenin is stabilized, accumulates in the nucleus, and partners with TCF/LEF proteins at Wnt response elements to activate transcription. This pathway governs cell proliferation, fate determination, stem cell maintenance, and tissue patterning during development and homeostasis. Aberrant activation of Wnt/beta-catenin signaling, often through mutations affecting beta-catenin or its regulators, is a major driver of colorectal and other cancers, making this pathway a central focus of developmental biology and cancer research.

Product Description & Applications

The TCF/LEF Reporter Lentivirus is a TOPFlash-style transcription factor reporter system that provides a fluorescent or luminescent readout of Wnt/beta-catenin pathway activation in mammalian cells. The construct places a reporter gene (d2GFP, GFP, RFP, firefly luciferase, or Renilla luciferase) under the control of tandem Wnt response elements coupled to a minimal promoter and an optimized upstream enhancer that maximizes signal-to-noise. Reporter activity is driven primarily by LEF1, with contributions from TCF1 and context-dependent TCF4. A constitutive drug selection marker (Blasticidin or Puromycin) enables generation of stable polyclonal reporter cell lines. Supplied as high-titer particles purified by PEG precipitation and sucrose gradient centrifugation, it is well suited to studying Wnt/beta-catenin signaling in primary and difficult-to-transfect cells.

About This Product

This reporter lentivirus places a d2GFP, Firefly Luc, GFP, Luc, Renilla Luc, RFP reporter gene under the control of tandem consensus response elements specific for the Wnt/b-catenin pathway transcription factor, coupled to a minimal TATA-box promoter and a proprietary upstream enhancer that maximizes signal-to-noise. The constitutively expressed selection marker (Blasticidin, Puromycin) and/or secondary reporter enables stable polyclonal cell line generation and flexible readout by fluorescence microscopy, flow cytometry, or luminometry.

Stable integration via the lentiviral backbone ensures consistent, clonally representative reporter expression in dividing and post-mitotic target cells — including primary T cells, macrophages, organoids, and cryopreserved material — eliminating the variability inherent to transient transfection. The self-inactivating LTR design and third-generation packaging minimize insertional mutagenesis risk and ensure biosafety classification at BSL-2.