Nanoscale Melittin@Zeolitic Imidazolate Frameworks for Enhanced Anticancer Activity and Mechanism Analysis

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Yawei Li1,2, Na Xu1,2, Wenhe Zhu1,2

  • 1Key Laboratory of Jilin Province for Zoonosis Prevention and Control , Institute of Military Veterinary Medicine, Academy of Military Medical Sciences , Changchun , 130122 , P. R. China.

ACS Applied Materials & Interfaces
|June 20, 2018
PubMed

Insights

Melittin-loaded zeolitic imidazolate framework-8 nanoparticles (MLT@ZIF-8 NPs) show enhanced cancer cell killing and reduced toxicity. This novel approach improves melittin

Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Cancer Therapeutics

Background:

  • Melittin (MLT) is a cytolytic peptide with anticancer potential but limited by nonspecific toxicity, such as hemolysis.
  • Zeolitic imidazolate framework-8 (ZIF-8) is a metal-organic framework (MOF) with tunable properties for drug delivery.

Purpose of the Study:

  • To develop a novel nanoplatform for melittin delivery to enhance its anticancer efficacy and reduce toxicity.
  • To investigate the mechanism of action of melittin-loaded ZIF-8 nanoparticles (MLT@ZIF-8 NPs) in cancer treatment.

Main Methods:

  • Synthesis and characterization of MLT@ZIF-8 nanoparticles.
  • In vitro cytotoxicity assays and confocal scanning imaging for cellular uptake.
  • Transcriptome analysis to elucidate the molecular mechanism of action.
  • In vivo antitumor activity and systemic toxicity evaluation.

Main Results:

  • MLT@ZIF-8 NPs demonstrated enhanced stability and inhibited melittin's hemolytic activity.
  • The nanoparticles exhibited increased cellular uptake and cytotoxicity against cancer cells compared to free melittin.
  • Transcriptome analysis revealed regulation of 3383 genes, implicating the PI3K/Akt-regulated p53 pathway in cancer cell apoptosis.
  • In vivo studies showed improved antitumor activity with no significant systemic toxicity.

Conclusions:

  • MLT@ZIF-8 NPs represent a promising nanoplatform for delivering cytolytic peptides in cancer therapy.
  • The developed nanoparticles offer a strategy to overcome the limitations of free melittin, enhancing its therapeutic index.
  • Understanding the molecular mechanisms provides a basis for future clinical applications of melittin-based cancer treatments.
Keywords:
ZIF-8anticancer activitymelittinnanocarrierp53 pathway

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