Related Experiment Video

Updated: May 21, 2025

Electrophoretic Mobility Shift Assay EMSA for the Study of RNA-Protein Interactions: The IRE/IRP Example
12:44

Electrophoretic Mobility Shift Assay EMSA for the Study of RNA-Protein Interactions: The IRE/IRP Example

Published on: December 3, 2014

53.6K

Iron-dependent mechanisms in Acinetobacter baumannii: pathogenicity and resistance

Rong Zhang1,2, Dan Li1,2, Hong Fang2

  • 1Department of Pulmonary and Critical Care Medicine, Southwest Medical University, Luzhou, China.

Jac-Antimicrobial Resistance
|March 20, 2025
PubMed

Insights

Acinetobacter baumannii uses iron acquisition systems for survival and virulence. Targeting these systems, like with cefiderocol, offers potential against multidrug-resistant infections.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Antimicrobial Resistance

Background:

  • Acinetobacter baumannii is a Gram-negative opportunistic pathogen causing significant healthcare challenges, especially in ICUs.
  • Multidrug resistance (MDR) and high mortality rates, particularly in critically ill COVID-19 patients, underscore the urgency of addressing A. baumannii infections.

Purpose of the Study:

  • To explore the critical role of iron acquisition systems in A. baumannii survival, growth, and pathogenicity.
  • To review potential therapeutic strategies targeting iron-dependent mechanisms to combat MDR A. baumannii.

Main Methods:

  • Review of existing literature on bacterial iron acquisition mechanisms, extrapolating findings to A. baumannii.
  • Analysis of therapeutic approaches targeting iron metabolism in bacteria, including siderophore-conjugated antibiotics and iron chelators.

Main Results:

  • A. baumannii employs multiple iron acquisition systems (siderophore production, haem uptake, TonB-dependent transport) crucial for virulence.
  • Therapeutic agents like cefiderocol show promise in treating MDR A. baumannii infections by targeting iron acquisition.

Conclusions:

  • Iron acquisition pathways are key virulence factors in A. baumannii, presenting viable therapeutic targets.
  • Further research and clinical trials are needed for novel strategies like synthetic siderophores and TonB receptor inhibitors to improve treatment outcomes.

More Related Videos

Synthesis and Catalytic Performance of Gold Intercalated in the Walls of Mesoporous Silica11:02

Synthesis and Catalytic Performance of Gold Intercalated in the Walls of Mesoporous Silica

Published on: July 9, 2015

10.0K
Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry12:08

Monitoring the Reductive and Oxidative Half-Reactions of a Flavin-Dependent Monooxygenase using Stopped-Flow Spectrophotometry

Published on: March 18, 2012

15.1K

Related Concept Videos

Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
6.8K
Corrosion02:49

Corrosion

The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
23.6K
The Electron Transport Chain01:30

The Electron Transport Chain

The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
15.9K
Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
9.9K
Introduction to Mechanisms of Enzyme Catalysis01:13

Introduction to Mechanisms of Enzyme Catalysis

For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
7.8K
The Supercomplexes in the Crista Membrane01:41

The Supercomplexes in the Crista Membrane

The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
2.5K