Current data indicates that the LIM protein network, including the LIM domain containing kinase (LIMK), the LIM-only (LMO) proteins, and LIM domain binding co-factors plays an important role in the development and metastasis of cancer. However, the manner in which these proteins function in cancer, their regulation by signal transduction, and their downstream effectors remain largely unknown. A known regulator of the LIM protein network is the ubiquitin ligase RLIM. We have demonstrated that RLIM regulates the activity of the LIM domain system through both targeted protein degradation (ubiquitination) and the recruitment of transcriptional co-repressor complexes. The purpose of this proposal is to investigate the role of RLIM in the development and metastasis of cancer, and to determine the mechanisms regulating RLIM activity in cancer. The project will attempt to address this question using three approaches: 1) determining the importance of RLIM activity in cell proliferation and metastasis of human cancer cells; 2) investigating the functional importance of RLIM phosphorylation by the MAPK and LIMK signaling pathways; and finally 3) to test the importance of RLIM, and RLIM phosphorylation, in vivo using the Zebrafish model system. ? ?

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
1F32CA108324-01
Application #
6790874
Study Section
Special Emphasis Panel (ZRG1-F09 (20))
Program Officer
Lohrey, Nancy
Project Start
2004-06-01
Project End
2007-05-31
Budget Start
2004-06-01
Budget End
2005-05-31
Support Year
1
Fiscal Year
2004
Total Cost
$37,476
Indirect Cost
Name
Zentrum Fur Molekulare Neurobiologie
Department
Type
DUNS #
City
Hamburg
State
Country
Germany
Zip Code
Johnsen, Steven A; Güngör, Cenap; Prenzel, Tanja et al. (2009) Regulation of estrogen-dependent transcription by the LIM cofactors CLIM and RLIM in breast cancer. Cancer Res 69:128-36
Tursun, Baris; Schluter, Anne; Peters, Marvin A et al. (2005) The ubiquitin ligase Rnf6 regulates local LIM kinase 1 levels in axonal growth cones. Genes Dev 19:2307-19