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Related Concept Videos

Catalytically Perfect Enzymes01:07

Catalytically Perfect Enzymes

The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
Targeted Cancer Therapies02:57

Targeted Cancer Therapies

The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...

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Updated: May 8, 2026

Biofunctionalization of Magnetic Nanomaterials
06:40

Biofunctionalization of Magnetic Nanomaterials

Published on: July 16, 2020

Engineering the Iron Center: Hemin Nanozymes for Programmable Cancer Catalysis.

Amir M Alsharabasy1, Godspower T Isaac1, Abhay Pandit1

  • 1CÚRAM, Research Ireland Centre for Medical Devices, University of Galway, Galway H91 W2TY, Ireland.

Nano Letters
|May 6, 2026
PubMed
Summary

Engineered hemin-based nanozymes overcome tumor microenvironment barriers to enhance cancer therapy. These nanomaterials reprogram redox environments, amplifying cell death for improved treatment efficacy.

Keywords:
cascade nanoreactorschemodynamic therapyhemin nanozymesredox modulationtumor microenvironment

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Cancer Therapy

Background:

  • The tumor microenvironment (TME) poses significant challenges to conventional cancer therapies due to hypoxia, acidity, and high glutathione levels.
  • Hemin, an iron protoporphyrin, acts as a versatile catalytic core for nanozymes, enabling redox modulation within the TME.

Purpose of the Study:

  • To review advancements in hemin nanotechnology for cancer therapy.
  • To highlight the integration of hemin-based architectures with multiple therapeutic pathways (chemodynamic, photodynamic, ferroptotic, metabolic).
  • To establish design principles for next-generation tumor-adaptive redox nanomaterials.

Main Methods:

  • Rational nanoengineering of hemin-based architectures.
  • Integration of catalytic nodes for amplified reactive oxygen species (ROS) production.
  • Development of cascade nanoreactors for synergistic therapeutic effects.
  • Exploration of biological modulation strategies within the TME.

Main Results:

  • Hemin nanozymes effectively reprogram the TME by amplifying ROS, recycling oxygen, and depleting antioxidants.
  • Engineered hemin architectures induce iron-dependent cell death, enhancing therapeutic outcomes.
  • Precision assembly and material engineering enable tunable redox modulation.

Conclusions:

  • Hemin nanotechnology offers a promising platform for developing tumor-adaptive redox nanomaterials.
  • A rational design toolbox guides the development of next-generation cancer therapeutics.
  • These nanomaterials demonstrate potential to overcome TME-related treatment resistance.