The manganese(III) porphyrin MnTnHex-2-PyP5+ modulates intracellular ROS and breast cancer cell migration: Impact on doxorubicin-treated cells.

Journal Article (Journal Article)

Manganese(III) porphyrins (MnPs) are superoxide dismutase (SOD) mimics with demonstrated beneficial effects in cancer treatment in combination with chemo- and radiotherapy regimens. Despite the ongoing clinical trials, little is known about the effect of MnPs on metastasis, being therefore essential to understand how MnPs affect this process. In the present work, the impact of the MnP MnTnHex-2-PyP5+ in metastasis-related processes was assessed in breast cancer cells (MCF-7 and MDA-MB-231), alone or in combination with doxorubicin (dox). The co-treatment of cells with non-cytotoxic concentrations of MnP and dox altered intracellular ROS, increasing H2O2. While MnP alone did not modify cell migration, the co-exposure led to a reduction in collective cell migration and chemotaxis. In addition, the MnP reduced the dox-induced increase in random migration of MDA-MB-231 cells. Treatment with either MnP or dox decreased the proteolytic invasion of MDA-MB-231 cells, although the effect was more pronounced upon co-exposure with both compounds. Moreover, to explore the cellular mechanisms underlying the observed effects, cell adhesion, spreading, focal adhesions, and NF-κB activation were also studied. Although differential effects were observed according to the endpoints analysed, overall, the alterations induced by MnP in dox-treated cells were consistent with a therapeutically favorable outcome.

Full Text

Duke Authors

Cited Authors

  • Flórido, A; Saraiva, N; Cerqueira, S; Almeida, N; Parsons, M; Batinic-Haberle, I; Miranda, JP; Costa, JG; Carrara, G; Castro, M; Oliveira, NG; Fernandes, AS

Published Date

  • January 2019

Published In

Volume / Issue

  • 20 /

Start / End Page

  • 367 - 378

PubMed ID

  • 30408752

Pubmed Central ID

  • PMC6222139

Electronic International Standard Serial Number (EISSN)

  • 2213-2317

Digital Object Identifier (DOI)

  • 10.1016/j.redox.2018.10.016


  • eng

Conference Location

  • Netherlands