Cadherin-6 (D3T3I) Rabbit mAb #48111

Cadherins are a superfamily of transmembrane glycoproteins that contain cadherin repeats of approximately 100 residues in their extracellular domain. Cadherins mediate calcium-dependent cell-cell adhesion and play critical roles in normal tissue development (1). The classic cadherin subfamily includes N-, P-, R-, B-, and E-cadherins, as well as about ten other members that are found in adherens junctions, a cellular structure near the apical surface of polarized epithelial cells. The cytoplasmic domain of classical cadherins interacts with β-catenin, γ-catenin (also called plakoglobin), and p120 catenin. β-catenin and γ-catenin associate with α-catenin, which links the cadherin-catenin complex to the actin cytoskeleton (1,2). While β- and γ-catenin play structural roles in the junctional complex, p120 regulates cadherin adhesive activity and trafficking (1-4). Investigators consider E-cadherin an active suppressor of invasion and growth of many epithelial cancers (1-3). Research studies indicate that cancer cells have upregulated N-cadherin in addition to loss of E-cadherin. This change in cadherin expression is called the "cadherin switch." N-cadherin cooperates with the FGF receptor, leading to overexpression of MMP-9 and cellular invasion (3). Research studies have shown that in endothelial cells, VE-cadherin signaling, expression, and localization correlate with vascular permeability and tumor angiogenesis (5,6). Investigators have also demonstrated that expression of P-cadherin, which is normally present in epithelial cells, is also altered in ovarian and other human cancers (7,8).
Cadherin-6, also known as kidney cadherin (K-Cadherin, CDH6) is a type II classical cadherin. While it was reported to have a tumor suppressor function in cholangiocarcinoma (9), cadherin-6 expression was shown to be a marker of epithelial mesenchymal transition, and positively correlated with stage and metastasis of papillary thyroid carcinoma (10, 11). In related studies, cadherin-6 was shown to interact with GABARAP and related proteins to restrain autophagy, thereby promoting metastatic behavior (12). Cadherin-6 has since been proposed as an antibody-drug conjugate target for the treatment of ovarian and renal cancers (13).