BACKGROUND We have recently reported that mitogen-activated protein kinase (MAPK) JNK1 downregulates beta-catenin signaling and plays a critical role in regulating intestinal homeostasis and in suppressing tumor formation. This study was designed to determine whether JNK2, another MAPK, has similar and/or different functions in the regulation of beta-catenin signaling. METHODOLOGY AND PRINCIP...

The anabolic action of PTH in bone is mostly mediated by cAMP/PKA and Wnt-independent activation of β-catenin/T-cell factor (TCF) signaling. β-Catenin switches the PTH receptor (PTHR) signaling from cAMP/PKA to PLC/PKC activation by binding to the PTHR. Ixazomib (Izb) was recently approved as the first orally administered proteasome inhibitor for the treatment of multiple myeloma; it acts in pa...

Introduction: Colon cancer is known as one of the most current cancers in the world and Iran that high percentage of deadly caners in the world is related to colon cancer. The use of new method to treat and control of colon cancer in developed societies are on rise. Ozone is used as the new and effective method to treat of different diseases, infections and scars. In this study, the effects of ...

Cadherin-catenin interactions play an important role in cadherin-mediated adhesion. Here we present strong evidence that in the cadherin-catenin complex α-catenin contributes to the binding strength of another catenin, p120, to the same complex. Specifically, we found that a β-catenin-uncoupled cadherin mutant interacts much more weakly with p120 than its full-size counterpart and that it is ra...

Over 80% of colon cancer development and progression is a result of the dysregulation of β-catenin signaling pathway. Herein, for the first time, we demonstrate that a serine-threonine kinase, Protein Kinase D1 (PKD1), modulates the functions of β-catenin to suppress colon cancer growth. Analysis of normal and colon cancer tissues reveals downregulation of PKD1 expression in advanced stages of ...

Aberrant activation of β-catenin signaling plays an important role in human tumorigenesis. However, molecular mechanisms behind the β-catenin signaling deregulation are mostly unknown because genetic alterations in this pathway only account for a small fraction of tumors. Here, we investigator if other major pathways can regulate β-catenin signaling activity. By employing a panel of chemical ac...

The Wnt/beta-catenin pathway plays an important role in initiation in most, if not all, colon cancers. Prior work has provided important insights into the regulation of beta-catenin stability in the cytoplasm; however, relatively little is known about the mechanism by which beta-catenin activates gene transcription in the nucleus. Using genetic approaches, studies in human colon cancers and Dro...

We determined whether active PI3K signaling together with nuclear accumulation of β-Catenin is necessary to fully activate canonical WNT signaling and examined the association of both signaling pathways with colon cancer progression. Using reporter gene assays we examined the activation of β-Catenin mediated transcription upon PI3K inhibition with or without β-Catenin nuclear accumulation. Ecto...

BACKGROUND beta-catenin is a multifunctional protein involved in two apparently independent processes: cell-cell adhesion and signal transduction. beta-catenin is involved in Wnt signaling pathway that regulates cellular differentiation and proliferation. In this study, we investigated the expression pattern of beta-catenin and cyclin D1 using immunohistochemistry and searched for mutations in ...