A tropical lichen, Dirinaria consimilis selectively induces apoptosis in MCF-7 cells through the regulation of p53 and caspase-cascade pathway

Anil K. Shendge, Sourav Panja, Tapasree Basu, Nripendranath Mandal

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Background: Breast cancer is the most leading cause of death, with 49.9% of crude incidence rate and 12.9% of crude mortality rate. Natural resources have been extensively used throughout history for better and safer treatment against various diseases. Objectives: The present study was aimed to investigate the antioxidant and anticancer potential of a tropical lichen Dirinaria consimilis (DCME) and its phytochemical analysis. Methods: The DCME was preliminarily evaluated for ROS, and RNS scavenging potential. Furthermore, DCME was evaluated for in vitro anticancer activity through cell proliferation assay, cell cycle analysis, annexin V/PI staining, morphological analysis, and western blotting study. Finally, the HPLC and LC-MS analyses were done to identify probable bioactive compounds. Results: The in vitro antioxidant studies showed promising ROS, and RNS scavenging potential of DCME. Moreover, the in vitro antiproliferative study bared the cytotoxic nature of DCME towards MCF-7 (IC50-98.58 ± 6.82µg/mL) and non-toxic towards WI-38 (IC50-685.85 ± 19.51µg/mL). Furthermore, the flow-cytometric analysis revealed the increase in sub G1 population as well as early apoptotic populations dose-dependently. The results from confocal microscopy showed the DNA fragmentation in MCF-7 upon DCME treatment. Finally, the western blotting study revealed the induction of tumor suppressor protein, p53, which results in increasing the Bax/Bcl-2 ratio and activation of caspase-cascade pathways. Conclusion: The activation of caspase-3,-8,-9 and PARP degradation led us to conclude that DCME induces apoptosis in MCF-7 through both intrinsic and extrinsic mechanisms. The LC-MS analysis showed the presence of various bioactive compounds.

Original languageEnglish
Pages (from-to)1173-1187
Number of pages15
JournalAnti-Cancer Agents in Medicinal Chemistry
Volume20
Issue number10
DOIs
StatePublished - 1 Jan 2020
Externally publishedYes

Keywords

  • Anticancer
  • Antioxidant
  • Caspase-cascade
  • Dirinaria consimilis
  • Lichen
  • p53

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology
  • Cancer Research

Fingerprint

Dive into the research topics of 'A tropical lichen, Dirinaria consimilis selectively induces apoptosis in MCF-7 cells through the regulation of p53 and caspase-cascade pathway'. Together they form a unique fingerprint.

Cite this