Autoantibodies against stress-induced phosphoprotein-1 as a novel biomarker candidate for ovarian cancer

Sunghoon Kim, Han Byoul Cho, Eun Ji Nam, Sang Wun Kim, YoungTae Kim, Yong Won Park, Bo Wook Kim, Jae-Hoon Kim

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Detection of autoantibodies against tumor-associated antigens (TAA) has recently been shown to be a powerful tool for early detection of various cancers. The aim of this study was to investigate the possibility of using autoantibodies against TAA as novel biomarkers by a proteomics-based approach in patients with ovarian cancer. We used two-dimensional differential gel electrophoresis analysis of immuno-precipitated tumor antigens (2D-DITA) to compare the levels of autoandibodies in pretreatment and posttreatment sera of patients with ovarian cancers. The identified autoantibodies were validated by SYBR Green real-time polymerase chain reaction (PCR) and immunohistochemistry (IHC). We further evaluated the level of autoantibody in sera of 68 ovarian cancer patients by an enzyme-linked immunosorbent assay (ELISA). The autoantibody directed against stress-induced phosphoprotein-1 (STIP-1) emerged as a novel biomarker candidate for ovarian cancer. SYBR Green PCR and IHC confirmed that the STIP-1 mRNA and protein expression levels were significantly upregulated in ovarian cancers compared with normal and benign tumors (P = 0.003 and P < 0.001, respectively). A preliminary ELISA study showed that the serum levels of anti-STIP-1 autoantibodies were significantly elevated in ovarian cancer patients compared with healthy controls (P = 0.03). The results suggest that 2D-DITA is a useful tool to detect autoantibodies and that STIP-1 is a potential biomarker candidate for ovarian cancers.

Original languageEnglish
Pages (from-to)585-595
Number of pages11
JournalGenes Chromosomes and Cancer
Volume49
Issue number7
DOIs
Publication statusPublished - 2010 Jul 1

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Phosphoproteins
Autoantibodies
Ovarian Neoplasms
Biomarkers
Neoplasm Antigens
Serum
Enzyme-Linked Immunosorbent Assay
Immunohistochemistry
Electrophoresis, Gel, Two-Dimensional
Early Detection of Cancer
Proteomics
Real-Time Polymerase Chain Reaction
Polymerase Chain Reaction
Messenger RNA
Neoplasms
Proteins

All Science Journal Classification (ASJC) codes

  • Genetics
  • Cancer Research

Cite this

Kim, Sunghoon ; Cho, Han Byoul ; Nam, Eun Ji ; Kim, Sang Wun ; Kim, YoungTae ; Park, Yong Won ; Kim, Bo Wook ; Kim, Jae-Hoon. / Autoantibodies against stress-induced phosphoprotein-1 as a novel biomarker candidate for ovarian cancer. In: Genes Chromosomes and Cancer. 2010 ; Vol. 49, No. 7. pp. 585-595.
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Autoantibodies against stress-induced phosphoprotein-1 as a novel biomarker candidate for ovarian cancer. / Kim, Sunghoon; Cho, Han Byoul; Nam, Eun Ji; Kim, Sang Wun; Kim, YoungTae; Park, Yong Won; Kim, Bo Wook; Kim, Jae-Hoon.

In: Genes Chromosomes and Cancer, Vol. 49, No. 7, 01.07.2010, p. 585-595.

Research output: Contribution to journalArticle

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