Bacterial magnetosomes synthesized by magnetotactic bacteria

Some types of magnetotactic bacteria can produce magnetite even in anaerobic conditions, using nitric oxidenitrateor sulfate as a final acceptor for electrons.

Different methods that can be used to prepare the magnetosomes for these applications are described.

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In determining which strains to use, researchers determined that the most important characteristic to take into account was swimming speed. Domain analysis by means of magnetotactic bacteria. The advantageous properties of the magnetosomes compared with those of chemically synthesized nanoparticles of similar composition are also highlighted.

Researches have proposed four methods of moving synthetic objects. Around twenty proteins have been found in magnetotactic bacteria that are specifically used for the creation of magnetosomes. The magnetosome core is also usually of high levels of purity and crystallinity Bazylinski and Frankel, The difference between bacterial magnetosomes and human magnetosomes appears to be the number of magnetite particles synthesized per cell, the clustering of those particles within each respective organism, and the purpose of each magnetosome.

A readily available magnetic nanoparticle would be of great use to the biotech community. Such macromolecules include poly-Glu, poly-Lys, poly-Asp, polyethylene glycol, and dextran. Normally, in the Northern hemisphere, MTB orient themselves northwards along geomagnetic lines.


One of the simplest applications for live MTB lies in their ability to detect magnetic fields in substances. Lakes or oceans oxygen concentration is commonly dependent on depth. Credit to Martel et al. As of today, only oxide-producers have been found in freshwater environments, which range from North America to Asia.

In order to see these bacteria, researchers determined that the best and easiest method to detect the MTB while out on job was to use an MRI machine. Drugs with primary amino groups can also be loaded onto BMs with this indirect method.

Therefore, there is a large increase in the benefit to risk ratio when doxorubicin is conjugated to the magnetosomes, showing the potential of drugs conjugated to magnetosomes for cancer treatments.

Magnetotactic bacteria

For example, for targeting tumors, it has been suggested to use suspensions of living magnetotactic bacteria, which are administered intravenously and are naturally attracted by the anoxic environment of the tumor Benoit et al. Abstract Magnetotactic bacteria belong to a group of bacteria that synthesize iron oxide nanoparticles covered by biological material that are called magnetosomes.

The single domain crystals have the maximum possible magnetic moment per unit volume for a given composition. In terms of a more physical placement within their habitat, MTB are most likely to be found at the water-sediment interface or thereabouts.

These crystals, and sometimes the chains of crystals, can be preserved in the geological record as magnetofossils. It was found that rabbit temperatures did not increase following the administration of the suspensions of magnetosomes.

The collapse can occur during diagenesis and dolomitization. In specific conditions described below, these magnetic properties result in higher heating capacities and better magnetic resonance imaging MRI contrast agents for the magnetosomes than for chemically synthesized nanoparticles.R P Blakemore rediscovered the bacterial magnetoreception in his revolutionary paper and hence denoted the beginning of these wonder bacteria named Magnetotactic bacteria.

Blakemore's rediscovery was based on the northward migration of certain microorganisms present in.

Applications of Magnetosomes Synthesized by Magnetotactic Bacteria in Medicine

Bacterial magnetosomes (BMs) synthesized by magnetotactic bacteria have recently drawn great interest [12–15] as alternatives for targeting drug carriers due to their unique features such as paramagnetism, nanoscale, narrow-size distribution, and being bounded to the membrane [16–20].

Magnetotactic bacteria belong to a group of bacteria that synthesize iron oxide nanoparticles covered by biological material that are called magnetosomes.


Magnetosomes are intracellular, tens of nanometer-sized, membrane-bounded crystals of the magnetic minerals magnetite (Fe3O4) and greigite (Fe3S4) synthesized by a diverse group of prokaryotes.

Magnetotactic bacteria belong to a group of bacteria that synthesize iron oxide nanoparticles covered by biological material that are called magnetosomes. These bacteria use the magnetosomes as a compass to navigate in the direction of the earth’s magnetic field.

Alphandery E () Applications of magnetosomes synthesized by magnetotactic bacteria in medicine. Front Bioeng Biotechnol PubMedCentral PubMed Google Scholar Alphandery E, Carvallo C, Menguy N, Chebbi I (a) Chains of cobalt doped magnetosomes extracted from AMB-1 magnetotactic bacteria for application in.

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Bacterial magnetosomes synthesized by magnetotactic bacteria
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