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This biomarker is also known as:
  • Urinary stone protein,
  • Bone sialoprotein 1,
  • BSPI,
  • SPP-1,
  • BNSP,
  • Nephropontin,
  • early T-lymphocyte activation 1,
  • Osteopontin,
  • OPN,
  • Uropontin,
  • ETA-1,
  • Secreted phosphoprotein 1,


Osteopontin, also known as SPP1 or OPN, a secreted, integrin-binding matrix phosphorylated glycoprotein is involved in bone remodeling by osteoclasts and is overexpressed in many advanced cancers. Osteopontin has been identified as one of the leading genes that promotes the metastasis of hepatocellular carcinoma.


QA State: Curated
Type: Protein
Short Name:


There are no datasets associated with this biomarker.


The following organs have data associated with this biomarker…



Phase: One
QA State: Curated


No additional data available.

Performance Comment

Ninety biomarkers were measured using a series of multiplexed immunoassays and results analyzed by the EDRN data management center splitting the cases and controls into training and validation sets, excluding subjects with DCIS or atypical hyperplasia from the training phase. We found little evidence that any of these markers can discriminate women with invasive cancer from those with benign breast conditions.



Phase: One
QA State: Under Review


Osteopontin and other small integrin-binding ligand N-linked glycoproteins are emerging as important players in many stages of cancer progression. Chosen for the EDRN by detection in microarray expression studies.

Performance Comment

It has been shown that serum osteopontin levels can be used to discriminate between persons with exposure to asbestos who do not have early pleural mesothelioma and those with exposure to asbestos who do have early pleural mesothelioma, regardless of the histologic type of the mesothelioma. (Pass et. al., 2005, PMID:16221779)



Phase: Three
QA State: Under Review


Osteopontin (OPN) is a secreted, integrin-binding matrix phosphorylated glycoprotein that is overexpressed in many advanced cancers. The expression of OPN by HO-8910 ovarian cancer cells greatly promoted the progression of ovarian cancer. OPN expression dramatically increased the colony formation of ovarian cancer cells in vitro and tumor growth in vivo. Under the stress induced by serum depletion or curcumin treatment, OPN expression promoted the survival of ovarian cells through preventing stress-induced apoptosis. At the molecular level, both endogenous and exogenous OPN expression activated the PI3-K/Akt survival pathway and dramatically decreased p53 expression under serum depletion. In addition, HIF-1alpha was induced in OPN-producing cells under normoxia. Furthermore, we also found that inhibition of the PI3-K/Akt pathway attenuated OPN-mediated HIF-1alpha up-regulation in ovarian cancer cells. Taken together, these results indicate that OPN can increase the survival of ovarian cancer cells under stress conditions in vitro and promote the late progression of ovarian cancer in vivo, and the survival-promoting functions of OPN are mediated through Akt activation and the induction of HIF-1alpha expression.

Performance Comment

Of the 28 ovarian cancer biomarkers tested in prediagnostic specimens, from the PLCO, CA125 remains the single best biomarker for ovarian cancer and has its strongest signal within six months of diagnosis. Osteopontin (SPP1) alone was not a strong predictor.


This biomarker is currently being annotated or is under review. You must be logged in or do not have permission to view any additional information. Contact Heather Kincaid at if you should have access to this biomarker.


Mutation Statistics

Gene Name: SPP1
UniProt Accession #: P10451
Mutated Sites Count: 167
Associated Pubmed ID Count 11
CancerDO Count 18
Affected Protein Function Sites Count: 4

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