Related Experiment Video
Updated: Jan 28, 2026
05:08
Measurement of Tissue Non-Heme Iron Content using a Bathophenanthroline-Based Colorimetric Assay
Published on: January 31, 2022
5.6K
Hepcidin, iron, and bacterial infection
James C Barton1, Ronald T Acton2
1Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States; Southern Iron Disorders Center, Birmingham, AL, United States.
Vitamins and Hormones
|February 26, 2019
Summary
Hepcidin, an antimicrobial peptide, regulates iron balance and fights bacterial infections. This review examines hepcidin
Area of Science:
- Biochemistry
- Immunology
- Microbiology
Background:
- Hepcidin is a key peptide hormone regulating mammalian iron homeostasis.
- Hepcidin also functions as an innate antimicrobial agent against invasive bacteria.
- Iron metabolism is crucial for bacterial proliferation.
Purpose of the Study:
- To review the dual roles of hepcidin in iron regulation and antimicrobial defense.
- To explore bacterial iron acquisition mechanisms.
- To discuss hepcidin's efficacy in mouse infection models versus human infections, particularly in iron overload conditions.
Main Methods:
- Literature review of hepcidin, hepcidin genes, and bacterial iron acquisition.
- Analysis of studies on hepcidin's effects in mouse models infected with various bacteria.
- Examination of reported human infections linked to hepcidin function and iron overload.
Main Results:
- Hepcidin controls iron export via ferroportin, influencing systemic iron availability.
- Hepcidin limits bacterial growth by sequestering extracellular iron.
- Mouse models provide insights but have limitations in replicating complex human infections.
Conclusions:
- Hepcidin is a critical regulator of both iron metabolism and innate immunity.
- Understanding hepcidin's role is vital for treating infections, especially in iron-overloaded individuals.
- Further research is needed to bridge findings from mouse models to human clinical scenarios.
Related Concept Videos
01:33Bacterial Transformation
59.7K
In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.
Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...
Griffith made an unexpected discovery when he killed the pathogenic strain and mixed its remains with the live, non-pathogenic strain. Not only did the mixture kill host mice, but it also contained living pathogenic bacteria that...
59.7K
01:30Bacterial Signaling
40.6K
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
40.6K
00:43Bacterial RNA Polymerase
32.7K
Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
32.7K
01:20Infection
12.4K
When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
12.4K
01:26Stages of Infection
65.2K
Stages of infection describe what happens to a susceptible host once a pathogen invades the human body. The stages of infection are incubation, prodromal, illness, stage of decline, and convalescence. The incubation stage is the period from exposure to a pathogen until symptoms start. The infected person is unaware of impending illness as the pathogens grow and multiply within the body. The duration may vary depending on the type of infection. The incubation period of measles averages ten to...
65.2K
01:53Bacterial Transcription
36.5K
RNA polymerase (RNAP) carries out DNA-dependent RNA synthesis in both bacteria and eukaryotes. Bacteria do not have a membrane-bound nucleus. So, transcription and translation occur simultaneously, on the same DNA template.
Transcription can be divided into three main stages, each involving distinct DNA sequences to guide the polymerase. These are:
Transcription can be divided into three main stages, each involving distinct DNA sequences to guide the polymerase. These are:
36.5K