Related Experiment Video
Updated: Sep 23, 2025
11:28
Biofunctionalized Prussian Blue Nanoparticles for Multimodal Molecular Imaging Applications
Published on: April 28, 2015
10.5K
Engineered Bacteria with Genetic Circuits Accumulating Nanomagnets as MRI Contrast Agents
Merve Yavuz1, Mustafa Ütkür2,3, Ebru Şahin Kehribar1
1UNAM- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center, Bilkent University, Ankara, 06800, Turkey.
Small (Weinheim an Der Bergstrasse, Germany)
|May 14, 2022
Summary
Engineered bacteria accumulate magnetite for cancer theranostics. These magnetic nanoparticle-producing bacterial machines enhance magnetic resonance imaging (MRI) for diagnostics and enable hyperthermia treatment.
Area of Science:
- Biotechnology
- Nanotechnology
- Microbiology
Background:
- Growing cancer incidence necessitates advanced diagnostic tools and novel therapies.
- Magnetic nanoparticles (MNPs) offer biocompatible solutions for biomedical applications.
- Certain bacteria naturally synthesize magnetic nanocrystals for survival.
Purpose of the Study:
- To engineer Escherichia coli to accumulate magnetite for theranostic applications.
- To develop bacterial machines for targeted drug delivery and cancer treatment.
- To enhance cancer diagnostics using magnetic properties of engineered bacteria.
Main Methods:
- Genetic engineering of E. coli using Mms6 for magnetite accumulation.
- Incorporation of ferroxidase, iron transporter, and binding peptide for enhanced magnetic properties.
- Surface display of Mms6 via autotransporter protein for improved MRI performance.
Main Results:
- Engineered E. coli demonstrated enhanced magnetite accumulation.
- Combinatorial genetic modifications improved cellular paramagnetic behavior.
- Surface-displayed Mms6 augmented MRI performance in bacterial machines.
Conclusions:
- Engineered probiotic bacteria can serve as theranostic agents for cancer.
- Intracellular or extracellular magnetite accumulation facilitates MRI diagnostics and hyperthermia treatment.
- Bacterial machines show potential for advanced cancer theranostics.
Keywords:
genetic circuitsiron oxide nanoparticlesmagnetic bacteriamagnetic resonance imaging contrast agentsnanomagnetssynthetic biologyMore Related Videos
Related Concept Videos
01:24Magnetic Resonance Imaging
7.4K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
7.4K
01:18Other Unique Bacteria
88
Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic...
88