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Breast Cancer Research and Treatment

, Volume 152, Issue 1, pp 17–28 | Cite as

Inhibition of breast cancer cell migration by activation of cAMP signaling

  • Hongli Dong
  • Kevin P. Claffey
  • Stefan Brocke
  • Paul M. Epstein
Preclinical study

Abstract

Almost all deaths from breast cancer arise from metastasis of the transformed cells to other sites in the body. Hence, uncovering a means of inhibiting breast cancer cell migration would provide a significant advance in the treatment of this disease. Stimulation of the cAMP signaling pathway has been shown to inhibit migration and motility of a number of cell types. A very effective way of selectively stimulating cAMP signaling is through inhibition of cyclic nucleotide phosphodiesterases (PDEs). Therefore, we examined full expression profiles of all known PDE genes at the mRNA and protein levels in four human breast cancer cell lines and eight patients’ breast cancer tissues. By these analyses, expression of almost all PDE genes was seen in both cell lines and tissues. In the cell lines, appreciable expression was seen for PDEs 1C, 2A, 3B, 4A, 4B, 4D, 5A, 6B, 6C, 7A, 7B, 8A, 9A, 10A, and 11A. In patients’ tissues, appreciable expression was seen for PDEs 1A, 3B, 4A, 4B, 4C, 4D, 5A, 6B, 6C, 7A, 7B, 8A, 8B, and 9A. PDE8A mRNA in particular is prominently expressed in all cell lines and patients’ tissue samples examined. We show here that stimulation of cAMP signaling with cAMP analogs, forskolin, and PDE inhibitors, including selective inhibitors of PDE3, PDE4, PDE7, and PDE8, inhibit aggressive triple negative MDA-MB-231 breast cancer cell migration. Under the same conditions, these agents had little effect on breast cancer cell proliferation. This study demonstrates that PDE inhibitors inhibit breast cancer cell migration, and thus may be valuable therapeutic targets for inhibition of breast cancer metastasis. Since PDE8A is expressed in all breast cancer samples, and since dipyridamole, which inhibits PDE8, and PF-04957325, a selective PDE8 inhibitor, both inhibit migration, it suggests that PDE8A may be a valuable novel target for treatment of this disease.

Keywords

Breast cancer Cyclic nucleotide phosphodiesterase Cell migration cAMP signaling 

Notes

Acknowledgments

The authors acknowledge support for this work by Grants from the Smart Family Foundation, the Connecticut Breast Health Initiative Inc., the State of Connecticut Department of Public Health, and the National Multiple Sclerosis Society. PE dedicates this paper in memory of his sweet, beautiful, loving daughter, Serena Rae Epstein (March 22, 1984–July 1, 2011), who has been and continues to be his inspiration for everything he does.

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical standards

The authors declare that all experiments reported in this publication were performed in compliance with all current laws and regulations of the United States of America.

Supplementary material

10549_2015_3445_MOESM1_ESM.pdf (238 kb)
Supplementary material 1 (PDF 239 kb)

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Hongli Dong
    • 1
  • Kevin P. Claffey
    • 1
  • Stefan Brocke
    • 2
  • Paul M. Epstein
    • 1
  1. 1.Department of Cell BiologyUniversity of Connecticut Health CenterFarmingtonUnited States
  2. 2.Department of ImmunologyUniversity of Connecticut Health CenterFarmingtonUnited States

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