Biomarkers of metastatic potential in cultured adenocarcinoma clones

Mustafa Kh Dabbous, Margaret M. Jefferson, Haney Lena, Edwin Thomas

Research output: Contribution to journalArticle

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Abstract

Two-dimensional isoelectric focusing and gel electrophoresis followed by mass spectrometry were used to detect, measure, and identify changes in protein expression correlated with differences in the metastatic potential of cultured rat mammary adenocarcinoma cells. MTC is a non-metastatic cell clone derived from a primary tumor. MTLn2 and MTLn3 are low and high metastatic potential cell clones derived from lung metastases of the primary tumor. A total of 1,500 proteins was detected. The patterns of protein expression of MTLn2 and MTLn3 cells were similar. Only five spots had a threefold or greater statistically significant difference in staining intensity between MTLn2 and MTLn3 cells, whereas 70 spots differed between MTC and MTLn3 cells. Twenty spots were selected for further study, ten that had a positive correlation of staining intensity with metastatic potential and ten that had a negative (inverse) correlation. Of the 17 unique proteins that were identified, five have often been cited as tumor biomarkers. These included the positive biomarkers nucleophosmin (NPM) and 14-3-3 protein sigma and the negative biomarkers raf kinase inhibitor protein (RKIP), peroxiredoxin-2, and galectin-1. The only identified protein that was markedly higher in MTLn3 cells than in the lessmetastatic MTLn2 cells was 14-3-3 protein sigma. The results indicate that increased metastatic potential is associated with positive and negative changes in expression of particular proteins. Proteins that are positively correlated with metastatic potential may prove more useful as clinical biomarkers, but those with negative correlations may still provide useful information about underlying mechanisms of metastatic spread.

Original languageEnglish (US)
Pages (from-to)101-111
Number of pages11
JournalClinical and Experimental Metastasis
Volume28
Issue number2
DOIs
StatePublished - Feb 1 2011

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Adenocarcinoma
Clone Cells
Biomarkers
Proteins
14-3-3 Proteins
Phosphatidylethanolamine Binding Protein
Galectin 1
Staining and Labeling
Peroxiredoxins
Isoelectric Focusing
Tumor Biomarkers
Electrophoresis
Mass Spectrometry
Neoplasms
Breast
Gels
Neoplasm Metastasis
Lung

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research

Cite this

Biomarkers of metastatic potential in cultured adenocarcinoma clones. / Dabbous, Mustafa Kh; Jefferson, Margaret M.; Lena, Haney; Thomas, Edwin.

In: Clinical and Experimental Metastasis, Vol. 28, No. 2, 01.02.2011, p. 101-111.

Research output: Contribution to journalArticle

Dabbous, Mustafa Kh ; Jefferson, Margaret M. ; Lena, Haney ; Thomas, Edwin. / Biomarkers of metastatic potential in cultured adenocarcinoma clones. In: Clinical and Experimental Metastasis. 2011 ; Vol. 28, No. 2. pp. 101-111.
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