TY - JOUR
T1 - Effects of p21-activated kinase 1 inhibition on 11q13-amplified ovarian cancer cells
AU - Prudnikova, T. Y.
AU - Villamar-Cruz, O.
AU - Rawat, S. J.
AU - Cai, K. Q.
AU - Chernoff, J.
N1 - Publisher Copyright:
© 2016 Macmillan Publishers Limited.
PY - 2016/4/28
Y1 - 2016/4/28
N2 - p21-activated kinases (Paks) are Cdc42/Rac-activated serine-threonine protein kinases that regulate several key cancer-relevant signaling pathways, such as the Mek/Erk, PI3K/Akt and Wnt/b-catenin signaling pathways. Pak1 is frequently overexpressed and/or hyperactivated in different human cancers, including human breast, ovary, prostate and brain cancer, due to amplification of the PAK1 gene in an 11q13 amplicon. Genetic or pharmacological inactivation of Pak1 has been shown to reduce proliferation of different cancer cells in vitro and reduce tumor progression in vivo. In this work, we examined the roles of Pak1 in cellular and animal models of PAK1-amplified ovarian cancer. We found that inhibition of Pak1 leads to decreased proliferation and migration in PAK1-amplified/overexpressed ovarian cancer cells, and has no effect in cell that lack such amplification/overexpression. Further, we observed that loss of Pak1 function causes 11q13-amplified ovarian cancer cells to arrest in the G2/M phase of the cell cycle. This arrest correlates with activation of p53 and p21 Cip and decreased expression of cyclin B1. These findings suggest that small-molecule inhibitors of Pak1 may have a therapeutic role in the ∼25% of ovarian cancers characterized by PAK1 gene amplification.
AB - p21-activated kinases (Paks) are Cdc42/Rac-activated serine-threonine protein kinases that regulate several key cancer-relevant signaling pathways, such as the Mek/Erk, PI3K/Akt and Wnt/b-catenin signaling pathways. Pak1 is frequently overexpressed and/or hyperactivated in different human cancers, including human breast, ovary, prostate and brain cancer, due to amplification of the PAK1 gene in an 11q13 amplicon. Genetic or pharmacological inactivation of Pak1 has been shown to reduce proliferation of different cancer cells in vitro and reduce tumor progression in vivo. In this work, we examined the roles of Pak1 in cellular and animal models of PAK1-amplified ovarian cancer. We found that inhibition of Pak1 leads to decreased proliferation and migration in PAK1-amplified/overexpressed ovarian cancer cells, and has no effect in cell that lack such amplification/overexpression. Further, we observed that loss of Pak1 function causes 11q13-amplified ovarian cancer cells to arrest in the G2/M phase of the cell cycle. This arrest correlates with activation of p53 and p21 Cip and decreased expression of cyclin B1. These findings suggest that small-molecule inhibitors of Pak1 may have a therapeutic role in the ∼25% of ovarian cancers characterized by PAK1 gene amplification.
KW - Animals
KW - Cell Cycle Checkpoints/genetics
KW - Cell Cycle/genetics
KW - Cell Proliferation/genetics
KW - Cyclin B1/biosynthesis
KW - Female
KW - Gene Expression Regulation, Neoplastic
KW - Humans
KW - Mice
KW - Ovarian Neoplasms/genetics
KW - Signal Transduction
KW - Tumor Suppressor Protein p53/biosynthesis
KW - Xenograft Model Antitumor Assays
KW - p21-Activated Kinases/antagonists & inhibitors
UR - http://www.scopus.com/inward/record.url?scp=84938849271&partnerID=8YFLogxK
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=purepublist2023&SrcAuth=WosAPI&KeyUT=WOS:000374986000004&DestLinkType=FullRecord&DestApp=WOS
U2 - 10.1038/onc.2015.278
DO - 10.1038/onc.2015.278
M3 - Article
C2 - 26257058
SN - 0950-9232
VL - 35
SP - 2178
EP - 2185
JO - Oncogene
JF - Oncogene
IS - 17
ER -