A short peptide derived from the gN helix domain of FGF8b suppresses the growth of human prostate cancer cells.

Abstract:

:Previous studies have demonstrated that fibroblast growth factor 8b (FGF8b) is up-regulated in a large proportion of prostate cancer patients and that it plays a key role in prostate carcinogenesis. In this study, we designed and synthesized a gN helix domain derived short peptide (termed 8b-13) based on the analysis of the FGF8b-FGFR structure. The synthetic peptides inhibited the proliferation of prostate cancer cell lines, including PC-3 and DU-145 cells. Further investigations indicated that 8b-13 arrested the cell cycle at the G0/G1 phase, reduced the activation of the Erk1/2, P38, and Akt cascades, and down-regulated the expression of G1/S-specific cyclinD1. The suppression of DNA synthesis and the G1 to S phase transition due to the expression of proteins related to proliferation and cell cycle progression may contribute to the inhibitory effect of 8b-13 peptides on cellular proliferation. Our results not only suggest that 8b-13 exerts an antitumor effect in prostate cancer but also confirm the essential role of the gN helix domain in mediating the activity of FGF8b.

journal_name

Cancer Lett

journal_title

Cancer letters

authors

Li T,Luo W,He D,Wang R,Huang Y,Zeng X,Wang W,Chen X,Gao S,Yu Y,Li X,Wu X

doi

10.1016/j.canlet.2013.06.001

subject

Has Abstract

pub_date

2013-10-10 00:00:00

pages

226-36

issue

2

eissn

0304-3835

issn

1872-7980

pii

S0304-3835(13)00451-5

journal_volume

339

pub_type

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