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Pardaxin, an antimicrobial peptide, triggers caspase-dependent and ROS-mediated apoptosis in HT-1080 cells

Tsui-Chin Huang1, Jheng-Fong Lee1, Jyh-Yih Chen1

  • 1Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, 23-10 Dahuen Rd., Jiaushi, Ilan 262, Taiwan.

Marine Drugs
|November 11, 2011
PubMed

Insights

Pardaxin, an antimicrobial peptide, shows potential as an anticancer agent by inducing apoptosis in human fibrosarcoma cells. This peptide selectively triggers programmed cell death, offering a novel approach for cancer treatment.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • Antimicrobial peptides (AMPs) are being explored for therapeutic applications.
  • Pardaxin, isolated from the Red Sea Moses sole, is an AMP with unknown anticancer properties.
  • Apoptosis induction is a key mechanism in cancer prevention.

Purpose of the Study:

  • To investigate the antitumor activity of pardaxin against human fibrosarcoma HT-1080 cells.
  • To determine if pardaxin induces apoptosis and explore the underlying mechanisms.
  • To evaluate pardaxin's potential as a novel anticancer agent.

Main Methods:

  • Cell proliferation assays were performed on HT-1080 cells treated with pardaxin.
  • Apoptosis was assessed by measuring phosphatidylserine externalization and chromatin condensation.
  • Caspase-3/7 activities, mitochondrial membrane potential, and reactive oxygen species (ROS) production were analyzed.

Main Results:

  • Pardaxin significantly inhibited HT-1080 cell proliferation by inducing apoptosis.
  • Apoptosis was evidenced by increased phosphatidylserine externalization and chromatin condensation.
  • Pardaxin elevated caspase-3/7 activities, disrupted mitochondrial membrane potential, and increased ROS production, which were crucial for its effects.

Conclusions:

  • Pardaxin exhibits significant antitumor activity against human fibrosarcoma cells.
  • The mechanism involves pardaxin-induced apoptosis, mediated by caspase-3/7 activation and ROS generation.
  • Pardaxin represents a promising candidate for developing targeted cancer therapies.
Keywords:
antimicrobial peptideapoptosispardaxin

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