HISTOLOGY AND HISTOPATHOLOGY

Cellular and Molecular Biology

 

Review

HuR, a key post-transcriptional regulator, and its implication in progression of breast cancer

Zhu Yuan1,2, Andrew J. Sanders1, Lin Ye1 and Wen G. Jiang1

1Department of Surgery, Cardiff University School of Medicine, Cardiff, UK and
2Department of General Surgery, Beijing Friendship Hospital, Capital University of Medical Science, Beijing, P.R. China.

Offprint requests to: Dr. Wen G. Jiang, Department of Surgery, Cardiff University School of Medicine, Health Park, Cardiff, CF14 4XN, UK. e-mail: jiangw@cf.ac.uk


Summary. HuR, an ubiquitously expressed member of the Hu family, selectively binds and stabilizes ARE-containing mRNAs encoding proto-oncogenes, cell cycle regulators, cytokines and growth factors. The mechanism of HuR stabilization on target mRNAs is believed to be mediated through competition with destabilizing ARE-BPs. HuR is mainly localized within the cell nucleus and the nucleo-cytoplasmic shuttling of HuR is generally assumed as the initial and critical step of its stabilizing effects. A number of signaling pathways are believed to be involved in HuR shuttling. Due to the pivotal role played by HuR in stabilizing the mRNA of key factors or cytokines involved in carcinogenesis and subsequent progression, its implication and therapeutic potential in cancer have been investigated intensively since its discovery in 1996. This review discusses the role of HuR in the stabilization of key mRNAs and it’s the nucleo-cytoplasmic shuttling. The review also covers the current knowledge of HuR’s role in carcinogenesis, particularly its involvement in breast cancer, and the feasibility of using HuR as a therapeutic target for the treatment of breast cancer
. Histol Histopathol 25, 1331-1340 (2010)

Key words: HuR, AU- and U-rich elements (AREs), Nucleo-cytoplasmic shuttling, Carcinogenesis, Breast cancer

DOI: 10.14670/HH-25.1331