Protein kinase D1 attenuates tumorigenesis in colon cancer by modulating β-catenin/T cell factor activity.
Protein kinase D1 attenuates tumorigenesis in colon cancer by modulating β-catenin/T cell factor activity.
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DOI:
10.18632/oncotarget.2277
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发表时间:
2014-08-30
期刊:
影响因子:
--
通讯作者:
Jaggi M
中科院分区:
文献类型:
--
作者:
Sundram V;Ganju A;Hughes JE;Khan S;Chauhan SC;Jaggi M
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 colon cancer and its co-localization with β-catenin in the colon crypts. This PKD1 downregulation corresponds with the aberrant expression and nuclear localization of β-catenin. In-vitro investigation of the PKD1-β-catenin interaction in colon cancer cells reveal that PKD1 overexpression suppresses cell proliferation and clonogenic potential and enhances cell-cell aggregation. We demonstrate that PKD1 directly interacts with β-catenin and attenuates β-catenin transcriptional activity by decreasing nuclear β-catenin levels. Additionally, we show that inhibition of nuclear β-catenin transcriptional activity is predominantly influenced by nucleus targeted PKD1. This subcellular modulation of β-catenin results in enhanced membrane localization of β-catenin and thereby increases cell-cell adhesion. Studies in a xenograft mouse model indicate that PKD1 overexpression delayed tumor appearance, enhanced necrosis and lowered tumor hypoxia. Overall, our results demonstrate a putative tumor-suppressor function of PKD1 in colon tumorigenesis via modulation of β-catenin functions in cells.
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DOI:
10.1186/bcr2232
发表时间:
2009
期刊:
Breast cancer research : BCR
影响因子:
--
作者:
Eiseler T;Döppler H;Yan IK;Goodison S;Storz P
通讯作者:
Storz P
影响因子:
21.3
作者:
Eiseler T;Döppler H;Yan IK;Kitatani K;Mizuno K;Storz P
通讯作者:
Storz P
影响因子:
5.7
作者:
Chauhan SC;Ebeling MC;Maher DM;Koch MD;Watanabe A;Aburatani H;Lio Y;Jaggi M
通讯作者:
Jaggi M
影响因子:
5.6
作者:
Kisfalvi, Krisztina;Hurd, Cliff;Rozengurt, Enrique
通讯作者:
Rozengurt, Enrique
影响因子:
11.2
作者:
Du, Cheng;Jaggi, Meena;Balaji, K. C.
通讯作者:
Balaji, K. C.