Open AccessThe role of human pituitary transforming gene-1 in transcriptional and cytoskeletal regulation of cancer cells
Author(s) -
YiChu Liao,
Ji-hsiung Chen
Publication year - 2012
Publication title -
tzu-chi medical journal/cí-jì yīxué
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.343
H-Index - 15
eISSN - 2223-8956
pISSN - 1016-3190
DOI - 10.1016/j.tcmj.2012.04.006
Subject(s) - rhoa , microbiology and biotechnology , guanine nucleotide exchange factor , actin cytoskeleton , cytoskeleton , microtubule , motility , cancer cell , actin , metastasis , biology , gtpase , cancer research , cancer , cell , signal transduction , genetics
[[abstract]]Human pituitary tumor-transforming gene-1 (hPTTG1) is an oncogene that is expressed at a high level in most tumors, especially in metastatic ones. Accumulating evidence reveals that hPTTG1 is a trancription factor that has transcriptional activity either by directly or indirectly binding to DNA. Furthermore, hPTTG1 has been identified to regulate Rho guanine nucleotide exchange factor-H1 (GEF-H1) directly, by an interaction with microtubules and contributes to cancer progression. GEF-H1 activity is important for RhoA-dependent changes in cell morphology and actin organization. hPTTG1 activates GEF-H1/RhoA signaling to affect cytoskeleton organization, cell motility, cell invasion, and breast cancer metastasis. Thus, hPTTG1 links changes in microtubule integrity to RhoA-dependent regulation of the actin cytoskeleton, and therefore promotes cancer metastasis. The molecular mechanism that links microtubule dynamics to RhoA-GTPases has not, as yet, been elucidated