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Theaflavins depolymerize microtubule network through tubulin binding and cause apoptosis of cervical carcinoma HeLa

Subhendu Chakrabarty1, Amlan Das, Abhijit Bhattacharya

  • 1Department of Biotechnology and Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, WB 700019, India.

Journal of Agricultural and Food Chemistry
|February 18, 2011
PubMed

Insights

Theaflavins inhibit cervical cancer cell proliferation by disrupting microtubules. This microtubule depolymerization leads to cell cycle arrest and apoptosis, suggesting a novel therapeutic mechanism for theaflavins.

Area of Science:

  • Pharmacology
  • Cell Biology
  • Biochemistry

Background:

  • Cervical carcinoma is a significant global health concern.
  • Theaflavins, derived from tea, possess potential anticancer properties.
  • Understanding the molecular mechanisms of theaflavins is crucial for therapeutic development.

Purpose of the Study:

  • To investigate the antiproliferative effects of theaflavins on cervical carcinoma HeLa cells.
  • To elucidate the impact of theaflavins on cellular microtubules and tubulin polymerization.
  • To determine the potential mechanisms underlying theaflavins' anticancer activity.

Main Methods:

  • Assessing theaflavins' antiproliferative activity using IC50 values in HeLa cells.
  • Analyzing cell cycle progression and apoptosis induction.
  • Investigating theaflavins' effects on microtubule networks and purified tubulin polymerization in vitro.

Main Results:

  • Theaflavins inhibited HeLa cell proliferation (IC50 = 110 ± 2.1 μg/mL), induced G2/M phase arrest, and promoted apoptosis.
  • Theaflavins disrupted the cellular microtubule network, altered cell morphology, and reduced polymeric tubulin.
  • Theaflavins prevented microtubule polymerization in cells and inhibited in vitro tubulin polymerization (IC50 = 78 ± 2.43 μg/mL).

Conclusions:

  • Theaflavins exhibit significant antiproliferative activity against cervical carcinoma HeLa cells.
  • Microtubule depolymerization is a key mechanism contributing to theaflavins' anticancer effects.
  • Theaflavins demonstrate potential as therapeutic agents for cervical cancer through microtubule disruption.

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