Cytotoxic effect of TDZ on human cervical cancer cells

J Photochem Photobiol B. 2017 Aug:173:493-498. doi: 10.1016/j.jphotobiol.2017.06.032. Epub 2017 Jun 27.

Abstract

The present study investigates the anticancer activity of Thidiazuron (TDZ). Anticancer activity of TDZ was evaluated in cervical carcinoma cells (HeLa cells). Sulforhodamine-B (SRB) assay indicates that TDZ was about 100 times more toxic to the cancer cell than normal cells. TUNEL assay showed TDZ induced DNA damage in tumor cells. The loss of mitochondrial membrane potential (MMP) in cancer cells was observed following TDZ treatment. The Bax and bcl-2 gene expression ratio are highly responsible for the regulation of MMP balance, and these ratio was significantly altered following TDZ treatment. The p53 and caspase-3 expressions were increased in cancer cells following treatment. Caspase-3 activation is the key factor for apoptosis. Cytotoxicity of TDZ on HeLa cells was 100 times higher than normal kidney cell (MDCK cells). Moreover, the anticancer activity of TDZ was tested by DNA damage, mitochondrial dysfunction, some gene expression and caspase-3 inhibition in silico. TDZ detected has higher ability on early apoptosis of cancer cell through DNA damage. Additionally, cancer cellular MMP was significantly reduced under inoculation of TDZ. In silico assay confirmed that TDZ was able to bind with the active site of the capase-3 protein. Therefore, taking all these data together it is suggested that the TDZ may be a potential agent to act against cervical cancer cells.

Keywords: Anticancer; HeLa cells; Mitochondrial membrane potential; Thiadiazol.

MeSH terms

  • Animals
  • Binding Sites
  • Caspase 3 / chemistry
  • Caspase 3 / genetics
  • Caspase 3 / metabolism
  • DNA Damage / drug effects*
  • Dogs
  • Female
  • Gene Expression / drug effects
  • HeLa Cells
  • Humans
  • Madin Darby Canine Kidney Cells
  • Membrane Potential, Mitochondrial / drug effects
  • Microscopy, Fluorescence
  • Molecular Docking Simulation
  • Phenylurea Compounds / chemistry
  • Phenylurea Compounds / metabolism
  • Phenylurea Compounds / toxicity*
  • Protein Structure, Tertiary
  • Proto-Oncogene Proteins c-bcl-2 / genetics
  • Proto-Oncogene Proteins c-bcl-2 / metabolism
  • RNA, Messenger / metabolism
  • Thermodynamics
  • Thiadiazoles / chemistry
  • Thiadiazoles / metabolism
  • Thiadiazoles / toxicity*
  • Tumor Suppressor Protein p53 / genetics
  • Tumor Suppressor Protein p53 / metabolism
  • Uterine Cervical Neoplasms / metabolism
  • Uterine Cervical Neoplasms / pathology
  • bcl-2-Associated X Protein / genetics
  • bcl-2-Associated X Protein / metabolism

Substances

  • Phenylurea Compounds
  • Proto-Oncogene Proteins c-bcl-2
  • RNA, Messenger
  • Thiadiazoles
  • Tumor Suppressor Protein p53
  • bcl-2-Associated X Protein
  • thidiazuron
  • Caspase 3