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Isoforms of the polarity protein par6 have distinct functions

PAR-6 is essential for asymmetric division of the Caenorhabditis elegans zygote. It is also critical for cell polarization in many other contexts throughout the Metazoa. The Par6 protein contains a PDZ domain and a partial CRIB (Cdc42/Rac interactive...

Authors: Gao L and Macara IG

Identification of PDZK4, a novel human gene with PDZ domains, that is upregulated in synovial sarcomas

In an earlier study designed to investigate molecular mechanisms of carcinogenesis in synovial sarcomas (SSs), we applied a cDNA microarray to detect human genes with significantly increased expression in SS cells. Among the genes selected in this...

Authors: Nagayama S, Iiizumi M, Katagiri T, Toguchida J and Nakamura Y

PI3K promotes voltage-dependent calcium channel trafficking to the plasma membrane

Phosphatidylinositol 3-kinase (PI3K) has been shown to enhance native voltage-dependent calcium channel (Ca(v)) currents both in myocytes and in neurons; however, the mechanism(s) responsible for this regulation were not known. Here we show that PI3K...

Authors: Viard P, Butcher AJ, Halet G, Davies A, Nurnberg B, Heblich F and Dolphin AC

Function of Drg1/Rit42 in p53-dependent mitotic spindle checkpoint

Mutations in the Drg1/RTP/Rit42 gene are commonly identified in hereditary neuropathies of the motor and sensory systems. This gene was also identified as a p53 target gene and a differentiation-related, putative metastatic suppressor gene in human...

Authors: Kim KT, Ongusaha PP, Hong YK, Kurdistani SK, Nakamura M, Lu KP and Lee SW

SMYD3 encodes a histone methyltransferase involved in the proliferation of cancer cells

Colorectal and hepatocellular carcinomas are some of the leading causes of cancer deaths worldwide, but the mechanisms that underly these malignancies are not fully understood. Here we report the identification of SMYD3, a gene that is over-expressed...

Authors: Hamamoto R, Furukawa Y, Morita M, Iimura Y, Silva FP, Li M, Yagyu R and Nakamura Y

Identification and modulation of a caveolae-dependent signal pathway that regulates plasminogen activator inhibitor-1 in insulin-resistant adipocytes

Plasminogen activator inhibitor-1 (PAI-1) plays an important role in the pathogenesis of obesity-driven type 2 diabetes mellitus and associated cardiovascular complications. Here, we show that perturbation of caveolar microdomains leads to insulin...

Authors: Venugopal J, Hanashiro K, Yang ZZ and Nagamine Y

p51/p63 controls subunit alpha3 of the major epidermis integrin anchoring the stem cells to the niche

p51/p63, a member of the tumor suppressor p53 gene family, is crucial for skin development. We describe here identification of ITGA3 encoding integrin alpha(3) as a target of its trans-activating function, proposing that p51/p63 allows epidermal stem...

Authors: Kurata SI, Okuyama T, Osada M, Watanabe T, Tomimori Y, Sato S, Iwai A, Tsuji T, Ikawa Y and Katoh I

SD-208, a novel transforming growth factor beta receptor I kinase inhibitor, inhibits growth and invasiveness and enhances immunogenicity of murine and human glioma cells in vitro and in vivo

The cytokine transforming growth factor (TGF)-beta, by virtue of its immunosuppressive and promigratory properties, has become a major target for the experimental treatment of human malignant gliomas. Here we characterize the effects of a novel...

Authors: Uhl M, Aulwurm S, Wischhusen J, Weiler M, Ma JY, Almirez R, Mangadu R, Liu YW, Platten M, Herrlinger...

NGF-induced axon growth is mediated by localized inactivation of GSK-3beta and functions of the microtubule plus end binding protein APC

Little is known about how nerve growth factor (NGF) signaling controls the regulated assembly of microtubules that underlies axon growth. Here we demonstrate that a tightly regulated and localized activation of phosphatidylinositol 3-kinase (PI3K) at...

Authors: Zhou FQ, Zhou J, Dedhar S, Wu YH and Snider WD

Differential regulation of membrane type 1-matrix metalloproteinase activity by ERK 1/2- and p38 MAPK-modulated tissue inhibitor of metalloproteinases 2 expression controls transforming growth factor-beta1-induced pericellular collagenolysis

Acquisition of matrix metalloproteinase-2 (MMP-2) activity is temporally associated with increased migration and invasiveness of cancer cells. ProMMP-2 activation requires multimolecular complex assembly involving proMMP-2, membrane type 1-MMP...

Authors: Munshi HG, Wu YI, Mukhopadhyay S, Ottaviano AJ, Sassano A, Koblinski JE, Platanias LC and Stack MS

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