Recombinant Human Wnt-2/sFRP-1 Complex Protein, CF

Recombinant Human Wnt-2/sFRP-1 Complex Protein, CF Summary

Product Specifications

Product Datasheets

Carrier Free

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

Scientific Data

Bioactivity View Larger

Recombinant Human Wnt-2/sFRP-1 (Catalog # 11117-WN) activates TCF reporter activity in HEK293 human embryonic kidney cells. The ED₅₀ for this effect is 10.0-150 ng/mL.

Background: Wnt-2

Wnt-2 is one of 19 vertebrate members of the Wingless-type MMTV integration site (Wnt) family of highly conserved cysteine-rich secreted glycoproteins that are important for normal developmental processes (1). Human Wnt-2 is a 35 kDa, secreted, glycosylated member of the Wnt family of developmental proteins. It is considered a class 1 Wnt based on its strong transforming activity on C57MG cells. Human Wnt-2 is synthesized as a 360 amino acid (aa) precursor that contains a 335 aa mature region. The mature region contains 24 cysteines and two potential N-linked glycosylation sites. Mature human Wnt-2 is 96% aa identical to mature mouse and rat Wnt-2. Wnt-2 is produced by mammary myoepithelial cells, endometrial epithelial cells, and breast fibroblasts (2, 3). Wnts bind to the cell surface Frizzled family receptors in conjunction with low-density lipoprotein receptor-related protein family receptors (LRP5 or 6) resulting in the stabilization of intracellular beta -catenin levels (4). As intracellular beta -catenin levels rise, beta -catenin binds to TCF/LEF transcription factors leading to expression of Wnt target genes (5). Wnt-2 is known to bind to sFRPs, a family of secreted molecules that contain an N-terminal cysteine-rich domain (CRD) highly similar to the CRDs of the Frizzled family receptors (6,7). More than one molecule of sFRP is suggested to participate in the interaction with each Wnt molecule (7). R&D Systems produces biologically active human Wnt-2 protein in a complex with human sFRP-1, and this Wnt-2/sFRP-1 complex is stable in the physiological buffer without detergent. Expression of Wnt-1, Wnt-2, E-cadherin, and beta -catenin is a common occurrence in non-small cell lung cancer (NSCLC) and is related to tumor histology and grade (8). Wnt-2 signaling is required for TGF-beta -mediated endothelial-to-mesenchymal transition (EndMT) of human aortic endothelial cells (HAECs), suggesting that Wnt-2 may contribute to atherosclerotic plaque development, and render Wnt-2 as a potential target for therapeutic intervention aiming at controlling atherosclerosis (9).

Related Research Areas

• Search Cytokine and Growth Factor Products
• Wnt Ligands (Wnts)