Corporate Banner
Satellite Banner
Scientific Community
Become a Member | Sign in
Home>News>This Article

We Need Bacteria to Maintain a Good Immune System

Published: Thursday, October 25, 2012
Last Updated: Thursday, October 25, 2012
Bookmark and Share
Dr. Francisco Guarner, from the Vall d'Hebron University Hospital, talked about the functions of the bacteria in our body in the IDIBELL Seminar.

The first organisms those were able to obtain energy through inorganic matter and sunlight appered on Earth more than 3,500 million years ago. These were the cyanobacteria. Currently, there are still cyanobacteria that perform a similar function. The 20% of the total CO2 is fixed by cyanobacteria, being able to transform inorganic matter to organic. Bacteria with very few genes are able to play a key role in the generation of organic matter.

The bacteria, in addition to having the ability to do some functions, have a high adaptive capacity. Eukaryotic and prokaryotic organisms lack certain abilities that microbial communities have.

More benefits than harm

Often we associate bacteria with pathogens. But eukaryotic and prokaryotic organisms and bacteria live in symbiosis. The bacteria are in association with humans since our existence. Some are able to produce diseases, but they are not the majority. The bacteria lose their genetic capacity to adapt and eliminate what they do not need.

Pathogenic bacteria have a small number of genes. These pathogens usually disappear because they do not know how to resist the environment. And in general, the bacteria will produce more benefits than harm to human and other living beings.

In the sixties it was thought that it was better to live in an environment without bacteria. But the animals that were born and grow up in this environment were younger and needed more food. And they had also more atrophied immune system. Therefore, it was found that the bacteria are needed both to improve our growth and to keep a good immune system.

The bacteria have a system that produces vitamins that we do not have. In the colon, there is a constant production of proteins, which changes the presence and degradation of the fiber. "The immune system is instructed in the lining of the intestinal wall, also by infections. However, infections are not needed to develop the immune system. The colon needs to collect this information to instruct the intestinal wall", said Dr. Guarner.

A pathogen collected and recognized in the intestine, causing a cytokine, inflammation, and shows the immune system how to act against this pathogen. Through experiments in mice it has been shown that the presence or absence of bacteria in the intestines makes different the learning process in the brain.

Bacteria have much mobility genes. Two colonies of E. coli may be only 40% genetic match. It has been sequenced the genomes of two thousand species of bacteria. "There are 55 families of bacteria, six of whom live in humans", said the researcher.

"The bacteria in gut and mouth from different people are very similar, as they are very specialized. Whereas bacteria from the skin or hair, for example, differ considerably, even in areas of the same person", said Dr. Guarner.

"It has been in the gut microbiota is deficient in the West, so transplants are being made. It is very common in USA, but not in Spain" concluded the speaker.

Further Information
Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 2,800+ scientific posters on ePosters
  • More than 4,000+ scientific videos on LabTube
  • 35 community eNewsletters

Sign In

Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

Patented, a Molecule that Opens the Door to Develop New Drugs Against Immune Rejection
Researchers have patented a peptide that inhibits the immune response activated by the enzyme calcineurin which could serve to develop new more specific immunosuppressive drugs.
Thursday, August 01, 2013
Genetically Modified Stem Cells are Effective Against Acute Respiratory Diseases
Administration of genetically modified mesenchymal stem cells regenerates lung tissue and stops the inflammatory process in mice with acute lung injury.
Tuesday, June 18, 2013
Identified a Key Protein in Maintaining the Identity of B Lymphocytes
This finding could be useful for the study of blood diseases such as lymphoma and leukemia.
Monday, June 10, 2013
IDIBELL Licenses to Janus a Patent for the Treatment of Immune Diseases
The technology has been developed entirely in the Institute.
Thursday, December 06, 2012
Scientific News
Genetic Basis of Fatal Flu Side Effect Discovered
A group of people with fatal H1N1 flu died after their viral infections triggered a deadly hyperinflammatory disorder in susceptible individuals with gene mutations linked to the overactive immune response, according to a recent study.
Developing Drug Resistance may be a Matter of Diversity for Tuberculosis
Researchers have probed the bacteria that causes tuberculosis, Mycobacterium tuberculosis, to learn more about how individual bacterial cells change and adapt while in the human body.
Surprising Trait Found in Anti-HIV Antibodies
Scientists at The Scripps Research Institute (TSRI) have new weapons in the fight against HIV.
Some Gut Microbes May Be Keystones of Health
University of Oregon scientists have found that strength in numbers doesn’t hold true for microbes in the intestines. A minority population of the right type might hold the key to regulating good health.
Essential Component of Antiviral Defense Identified
Infectious disease researchers at the University of Georgia have identified a signaling protein critical for host defense against influenza infection.
Single Vaccine for Chikungunya, Related Viruses May be Possible
What if a single vaccine could protect people from infection by many different viruses? That concept is a step closer to reality.
Is Allergy the Price We Pay for Our Immunity to Parasites?
New findings help demonstrate the evolutionary basis for allergy.
Blocking the Transmission Of Malaria Parasites
Vaccine candidate administered for the first time in humans in a phase I clinical trial led by Oxford University’s Jenner Institute, with partners Imaxio and GSK.
Mucus – the First Line of Defence
Researchers reveal the important role of mucus in building a good defence against invaders.
Antibody Targets Key Cancer Marker
University of Wisconsin-Madison researchers have created a molecular structure that attaches to a molecule on highly aggressive brain cancer and causes tumors to light up in a scanning machine.

Skyscraper Banner
Go to LabTube
Go to eposters
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
2,800+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
4,000+ scientific videos