PSF3 marks malignant colon cancer and has a role in cancer cell proliferation

Yumi Nagahama, Masaya Ueno, Naotsugu Haraguchi, Masaki Mori, Nobuyuki Takakura

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


PSF3 (partner of Sld five 3) is a member of the tetrameric complex termed GINS, composed of SLD5, PSF1, PSF2, and PSF3, and well-conserved evolutionarily. Previous studies suggested that some GINS complex members are upregulated in cancer, but PSF3 expression in colon carcinoma has not been investigated. Here, we established a mouse anti-PSF3 antibody, and examined PSF3 expression in human colon carcinoma cell lines and colon carcinoma specimens. We found that PSF3 is expressed in the crypt region in normal colonic mucosa and that many PSF3-positive cells co-expressed Ki-67. This suggests that PSF3-positivity of normal mucosa is associated with cell proliferation. Expression of the PSF3 protein was greater in carcinoma compared with the adjacent normal mucosa, and even stronger in high-grade malignancies, suggesting that it may be associated with colon cancer progression. PSF3 gene knock-down in human colon carcinoma cell lines resulted in growth inhibition characterized by delayed S-phase progression. These results suggest that PSF3 is a potential biomarker for diagnosis of progression in colon cancer and could be a new target for cancer therapy.

Original languageEnglish
Pages (from-to)150-154
Number of pages5
JournalBiochemical and Biophysical Research Communications
Issue number2
Publication statusPublished - Feb 5 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


Dive into the research topics of 'PSF3 marks malignant colon cancer and has a role in cancer cell proliferation'. Together they form a unique fingerprint.

Cite this