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Quinazolino linked 4β-amidopodophyllotoxin conjugates regulate angiogenic pathway and control breast cancer cell

Ahmed Kamal1, Jaki R Tamboli, M Janaki Ramaiah

  • 1Medicinal Chemistry and Pharmacology, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500 007, India.

Bioorganic & Medicinal Chemistry
|September 24, 2013
PubMed

Insights

New quinazolino-linked podophyllotoxin conjugates show potent anticancer activity against pancreatic and breast cancer cells. These compounds inhibit cell division, reduce tumor microenvironment factors, and induce apoptosis, offering potential for cancer therapy.

Area of Science:

  • Medicinal Chemistry
  • Molecular Biology
  • Cancer Research

Background:

  • Podophyllotoxins are known for their anticancer properties.
  • Developing novel anticancer agents with improved efficacy and reduced side effects is crucial.
  • Quinazolino-linked conjugates represent a promising class of compounds for cancer treatment.

Purpose of the Study:

  • To synthesize and evaluate novel quinazolino-linked 4β-amidopodophyllotoxin conjugates for anticancer activity.
  • To investigate the mechanism of action of potent cytotoxic conjugates.
  • To assess the impact of these conjugates on tumor microenvironment and cellular processes.

Main Methods:

  • Synthesis of quinazolino-linked 4β-amidopodophyllotoxin conjugates (10aa-af and 10ba-bf).
  • Anticancer activity evaluation using MTT assay against Panc-1, MCF-7, and MDA-MB-231 cell lines.
  • Flow cytometry for cell cycle analysis and protein expression studies (p53, cyclin B1, Cdk1, VEGF-A, STAT-3, ERK1/2, AKT-1).
  • Assessment of integrin (αVβIII) inhibition and caspase-9 activation.

Main Results:

  • Compounds 10bc, 10bd, 10be, and 10bf demonstrated high cytotoxicity.
  • These conjugates induced G2/M cell cycle arrest and modulated key proteins involved in mitosis.
  • Significant downregulation of tumor microenvironment proteins (VEGF-A, STAT-3, ERK1/2, AKT-1) was observed.
  • Inhibition of integrin (αVβIII) and induction of mitochondrial apoptosis via caspase-9 activation were confirmed.

Conclusions:

  • The synthesized quinazolino-linked podophyllotoxin conjugates exhibit significant anticancer potential.
  • These compounds effectively inhibit cancer cell proliferation by targeting mitosis and the tumor microenvironment.
  • The observed mechanisms, including apoptosis induction and anti-angiogenic/anti-invasive effects, suggest their promise for breast cancer therapy.
Keywords:
AngiogenesisAnticancer activityCaspase-9Cell cycle arrestIntegrinMitochondrial membrane potential (MMP)Quinazolino linked podophyllotoxin conjugatesVEGF-A

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