Gadolinium inhibits prostate cancer PC3 cell migration and suppresses osteoclast differentiation in vitro.

Abstract:

:This study examined whether Gd (gadolinium) could suppress prostate cancer cell migration and prostate cancer cell-induced osteoclast differentiation. MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide] and colony forming assay showed that GdCl3 treatment inhibited both cell viability and colony forming ability in PC3 cells more significantly than that in DU145 cells. Annexin/PI (propidium iodide) staining showed an increase in apoptotic death of PC3 cells in the presence of GdCl3. Wound healing and adhesion assay indicated that GdCl3 suppressed PC3 cell migration. Western-blot analysis demonstrated that GdCl3 treatment inhibited phosphorylation of ERK (extracellular-signal-regulated kinase) and p38 MAPK (mitogen-activated protein kinase). Pretreatment with PTx (pertussis toxin), a Gi protein inhibitor, conferred resistance to GdCl3-induced colony formation, ERK and p38 phosphorylation in PC3 cells. Moreover, GdCl3 inhibited PC3 cell-induced osteoclast differentiation. RT-PCR (reverse transcription-PCR) indicated that GdCl3 decreased the expression of RANKL (receptor activator of nuclear factor-κB ligand) in PC3 cells, whereas it increased the expression of OPG (osteoprotegerin) in PC3 and DU145 cells. In conclusion, the present study indicated that GdCl3 inhibited PC3 cell migration mediated by the inactivation of both ERK and p38 MAPK pathways via PTx-sensitive G proteins, and also suppressed PC3 cell-induced osteoclast differentiation via regulating the mRNA expression of OPG and RANKL.

journal_name

Cell Biol Int

authors

Wang P,Zou XM,Huang J,Zhang TL,Wang K

doi

10.1042/CBI20100870

subject

Has Abstract

pub_date

2011-11-01 00:00:00

pages

1159-67

issue

11

eissn

1065-6995

issn

1095-8355

pii

CBI20100870

journal_volume

35

pub_type

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