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Impairing Powerhouse in Colon Cancer Cells by Hydrazide-Hydrazone-Based Small Molecule

Sohan Patil1, Meenu Mahesh Kuman1, Sandeep Palvai1

  • 1Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.

ACS Omega
|July 20, 2018
PubMed

Insights

Researchers developed a novel small molecule targeting cancer cell mitochondria. This compound induces programmed cell death by affecting B-cell CLL/lymphoma 2 (Bcl-2) proteins and cytochrome c release, showing promise for new anticancer therapies.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Mitochondria are emerging as key targets for next-generation cancer therapies.
  • Small molecules targeting cancer cell mitochondria hold significant therapeutic potential.
  • Inhibiting antiapoptotic proteins like B-cell CLL/lymphoma 2 (Bcl-2) can trigger cancer cell death.

Purpose of the Study:

  • To synthesize and identify novel hydrazide-hydrazone-based small molecules as potential anticancer agents.
  • To investigate the mechanism of action of a novel small molecule targeting cancer cell mitochondria.
  • To evaluate the efficacy and selectivity of the identified compound against colon cancer cells.

Main Methods:

  • Synthesis of a library of hydrazide-hydrazone-based small molecules.
  • Assessment of mitochondrial outer membrane permeabilization and cytochrome c release.
  • Analysis of apoptosis induction, cell cycle arrest (G2/M phase), and caspase cleavage (caspase-9/3) in HCT-116 cells.
  • Confocal microscopy, cell sorting, and immunoblotting techniques were employed.
  • Cell viability assays on various colon cancer cell lines (HCT-116, DLD-1, SW-620) and healthy fibroblast cells (L929).

Main Results:

  • A novel small molecule was identified that induces mitochondrial outer membrane permeabilization.
  • The compound inhibits antiapoptotic B-cell CLL/lymphoma 2 (Bcl-2) family proteins, leading to cytochrome c sequestration.
  • Programmed cell death (apoptosis) and G2/M cell cycle arrest were observed in HCT-116 colon cancer cells.
  • The small molecule demonstrated selective toxicity towards colon cancer cells while sparing healthy fibroblast cells.

Conclusions:

  • The novel small molecule effectively induces cancer cell death through mitochondrial targeting.
  • This compound represents a potential new class of mitochondria-targeting anticancer agents.
  • The findings support the development of novel therapeutics focused on mitochondrial pathways in cancer.

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