Expression of LDL-A module of relaxin receptor in prostate cancer cells inhibits tumorigenesis.

Abstract:

:Peptide hormone relaxin produced in normal and cancer prostate cells can stimulate prostate cancer progression. Suppression of relaxin or relaxin receptor RXFP1 expression inhibited prostate cancer both in vitro and in vivo. RXFP1 is a G protein-coupled receptor with the extracellular low density lipoprotein A (LDL-A) module located at the N-terminus. The LDL-A module exhibits a competitive inhibition effect on the RXFP1 function and might be used to suppress relaxin signaling. In this study, we investigated the effect of LDL-A overexpression on prostate cancer cells. PC3 cells expressing the RXFP1-LDL-A module had a decreased proliferation, soft agar colony formation, adhesion, invasion in vitro, and grew at a slower rate than control cells as tumors in xenograft models in mice. Expression analysis revealed that the RXFP1-LDL-A expression in PC3 cells inhibited Akt phosphorylation and MMP2 activation, and led to the down-regulation of several genes previously implicated in tumorigenesis, such as MMP28, S100P, IGFBP2, MUC1 and S100A4. These results indicate that the inhibition of RXFP1 by peptide based on the LDL-A module of this receptor may be a potential approach for prostate cancer suppression.

journal_name

Int J Oncol

authors

Feng S,Agoulnik AI

doi

10.3892/ijo.2011.1159

subject

Has Abstract

pub_date

2011-12-01 00:00:00

pages

1559-65

issue

6

eissn

1019-6439

issn

1791-2423

journal_volume

39

pub_type

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