A therapeutic target for prostate cancer based on angiogenin-stimulated angiogenesis and cancer cell proliferation

Norie Yoshioka, Li Wang, Koji Kishimoto, Takanori Tsuji, Guo Fu Hu

Research output: Contribution to journalArticle

117 Citations (Scopus)

Abstract

Human angiogenin is progressively up-regulated in the prostate epithelial cells during the development of prostate cancer from prostate intraepithelial neoplasia (PIN) to invasive adenocarcinoma. Mouse angiogenin is the most up-regulated gene in AKT-induced PIN in prostate-restricted AKT transgenic mice. These results prompted us to study the role that angiogenin plays in prostate cancer. Here, we report that, in addition to its well established role in mediating angiogenesis, angiogenin also directly stimulates prostate cancer cell proliferation. Angiogenin undergoes nuclear translocation in PC-3 human prostate cancer cells grown both in vitro and in mice. Thus, knocking down angiogenin expression in PC-3 human prostate adenocarcinoma cells inhibits ribosomal RNA transcription, in vitro cell proliferation, colony formation in soft agar, and xenograft growth in athymic mice. Blockade of nuclear translocation of angiogenin by the aminoglycoside antibiotic neomycin inhibited PC-3 cell tumor growth in athymic mice and was accompanied by a decrease in both cancer cell proliferation and angiogenesis. These results suggest that angiogenin has a dual effect, angiogenesis and cancer cell proliferation, in prostate cancer and may serve as a molecular target for drug development. Blocking nuclear translocation of angiogenin could have a combined benefit of antiangiogenesis and chemotherapy in treating prostate cancer.

Original languageEnglish
Pages (from-to)14519-14524
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume103
Issue number39
DOIs
Publication statusPublished - Sep 26 2006

Keywords

  • Nuclear translocation
  • Ribosome biogenesis
  • Tumor therapy

ASJC Scopus subject areas

  • General

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