A heparin-binding growth factor secreted from breast cancer cells homologous to a developmentally regulated cytokine

A. Wellstein, W. Fang, A. Khatri, Y. Lu, S. S. Swain, R. B. Dickson, J. Sasse, A. T. Riegel, M. E. Lippman

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Abstract

We report purification of an 18-kDa heparin-binding growth factor secreted from human cancer cells which is homologous to a developmentally regulated, neurotrophic factor, heparin-binding growth-associated molecule/pleiotrophin (HB-GAM/PTN; Merenmies, J., and Rauvala, H. (1990) J. Biol. Chem. 265, 16721-16724; Li, Y. S., Milner, P. G., Chauhan, A. K., Watson, M. A., Hoffman, R. M., Kodner, C. M., Milbrandt, J., and Deuel, T. F. (1990) Science 250, 1690-1694). We have purified the protein from tissue culture supernatants of human breast cancer cells (MDA-MB 231) and have used soft agar cloning of an epithelial cell line (SW-13) to detect its growth stimulating activity. A 32,000-fold purification was achieved by isoelectric focusing, heparin affinity chromatography, and reversed phase high pressure liquid chromatography. The molecular mass of the protein was confirmed by gel filtration chromatography in the presence of detergent and bioassay of the fractions. The N-terminal sequence was homologous to HB-GAM/PTN, and polymerase chain reaction amplification and DNA sequencing confirmed that the respective transcript was present in the cancer cells. We conclude that HB-GAM/ PTN can function as a tumor growth factor in addition to its role during neuronal development.

Original languageEnglish (US)
Pages (from-to)2582-2587
Number of pages6
JournalJournal of Biological Chemistry
Volume267
Issue number4
StatePublished - Jan 1 1992

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ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

Wellstein, A., Fang, W., Khatri, A., Lu, Y., Swain, S. S., Dickson, R. B., Sasse, J., Riegel, A. T., & Lippman, M. E. (1992). A heparin-binding growth factor secreted from breast cancer cells homologous to a developmentally regulated cytokine. Journal of Biological Chemistry, 267(4), 2582-2587.