ROS-induced autophagy reduces B16F10 melanoma cell proliferative activity

  • Gustavo Miranda Pires Santos
  • Susana C. P. S. Oliveira
  • Juliana C. S. Monteiro
  • Sandra R. Fagnani
  • Fernando Pires Sampaio
  • Neandder Andrade Correia
  • Pedro J. L. Crugeira
  • Antonio L. B. Pinheiro
Original Article

Abstract

Cancer is a pathology characterized by increased cell progression and/or reduced programmed cell death. Melanoma shows a rapid increase in cell progression and its resistance to chemotherapy is associated with uncontrolled apoptosis and to mechanisms that increase the flow of the drug out of the cell. The objective of this study was to evaluate the effects of photodynamic therapy (PDT) on the cell proliferation and cellular alterations in B16F10 murine melanoma. For that, four experimental groups were evaluated: the control group; laser group (ʎ = 660 ηm, 40 mW, 2.4 J/cm2); photosensitizer group (solution containing methylene blue and toluidine blue 1:1–12.5 μg/mL); PDT group. The incubation time was 30 min. Fluorescence microscopy assays were performed without fixation with the DAPI, monodansylcadaverine (MDC), and dihydroethidium (DHE) probes. Cell proliferation was also determined at 24-h time. The tests were performed in triplicate and the statistical test used was ANOVA with Tukey post-test. The results demonstrate that the plasma membrane of the cells of all the experimental groups remained intact, ROS production and autophagy significantly increased (p < 0.0005 and p < 0.0071, respectively) only in the PDT group. The cell proliferation essay showed a reduction of 74.2% on the PDT group in relation to the control group. The present study demonstrated that oxidative stress promoted by photodynamic therapy may induce autophagy and consequently reduce cell proliferation in B16F10 melanoma.

Keywords

Cancer Autophagy Photodynamic therapy 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

The use of commercial murine cells (Murine melanoma cells B16F10 (ATCC: CRL-6475) does not need the approval of the Ethics Committee according to Brazilian regulations.

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Copyright information

© Springer-Verlag London Ltd., part of Springer Nature 2018

Authors and Affiliations

  • Gustavo Miranda Pires Santos
    • 1
  • Susana C. P. S. Oliveira
    • 1
    • 2
  • Juliana C. S. Monteiro
    • 1
    • 2
  • Sandra R. Fagnani
    • 1
  • Fernando Pires Sampaio
    • 1
  • Neandder Andrade Correia
    • 1
  • Pedro J. L. Crugeira
    • 1
  • Antonio L. B. Pinheiro
    • 1
    • 3
    • 4
  1. 1.Center of Biophotonics, School of DentistryFederal University of Bahia – UFBASalvadorBrazil
  2. 2.Department of BiologyFeira de Santana State UniversityFeira de SantanaBrazil
  3. 3.National Institute of Basic Optics and Applied to Life Sciences, Physics Institute of São CarlosUniversity of São PauloSão CarlosBrazil
  4. 4.Biomedical Engineering InstituteUniversidade BrasilSão PauloBrazil

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