Navigation Links
Breast-fed babies' gut microbes contribute to healthy immune systems
Date:5/21/2012

URBANA A new multi-university study reports that differences in bacterial colonization of the infant gut in formula-fed and breast-fed babies lead to changes in the expression of genes involved in the infant's immune system.

The study, published in the April 30 issue of BioMed Central's open access journal Genome Biology, is an Editor's Pick. The research was a joint effort of University of Illinois, Texas A&M University, Miami University, and University of Arkansas scientists.

"This study provides a first insight into the interactions between microbes and the developing infant and how these interactions are affected by diet. It also demonstrates the power of new experimental and analytical approaches that enable the simultaneous analysis of the microbiome and the host response," said Mihai Pop of the University of Maryland in a review of the study for the publishing journal.

There is strong evidence that the colonization of the body by microbes has an important influence on the development of infants' immune systems, he added.

In the study, the researchers compared the genes expressed in cells from the intestines of three-month-old exclusively breast-fed or formula-fed infants and related this to their gut microbes. The human intestine is lined by epithelial cells that process nutrients and provide the first line of defense against food antigens and pathogens. Approximately one-sixth of the intestinal epithelial cells are shed every day into feces, providing a non-invasive picture of what is going on inside the gut.

The baby's gene expression profile was compared to the genes contained in the microbes in its gut, or the bacterial metagenome. This analysis provides a picture of who the bacteria are and what they are doing.

The study showed that babies that had been fed only breast milk had a more diverse bacterial colonization than formula-fed babies. The scientists also found a link between the expression of genes in the bacteria and genes of the immune system in the baby.

"While we found that the microbiome of breast-fed infants is significantly enriched in genes associated with 'virulence,' including resistance to antibiotics and toxic compounds, we also found a correlation between bacterial pathogenicity and the expression of host genes associated with immune and defense mechanisms," said Robert Chapkin of Texas A&M University.

Iddo Friedberg of Miami University in Ohio said that the differences in virulence genes probably do not reflect an infection. "The breast-fed babies had a larger complement of gram-negative bacteria than the formula-fed babies. Gram-negative bacteria have genes that, although classified as 'virulent,' can activate the immune system but not cause an infection in the process. We are now studying this finding in greater depth," he said.

"The findings show that human milk feeding promotes the beneficial microbe population in the gut and crosstalk between these bacteria and the immune system of the infant and are helping us to define exactly why breast is best," said U of I scientist Sharon Donovan.


'/>"/>
Contact: Phyllis Picklesimer
p-pickle@illinois.edu
217-244-2827
University of Illinois College of Agricultural, Consumer and Environmental Sciences
Source:Eurekalert

Related biology news :

1. Big-mouthed babies drove the evolution of giant island snakes
2. Vitamin D for pregnant women and babies -- how much is enough?
3. Lizard moms may prepare their babies for a stressful world
4. 2 servings of salmon a week is healthy for pregnant women and their babies
5. New infant formula ingredients boost babies immunity by feeding their gut bacteria
6. Babies are born with intuitive physics knowledge, says MU researcher
7. Breastfeeding saved babies in 19th century Montreal
8. Barracuda babies: Novel study sheds light on early life of prolific predator
9. Babies born with no eyes: Scientists identify genetic cause
10. Premature babies at risk of ill health in later life, research suggests
11. Sleep disruption for breastfed babies is temporary
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/16/2016)... --  EyeLock LLC , a market leader of iris-based ... IoT Center of Excellence in Austin, Texas ... embedded iris biometric applications. EyeLock,s iris authentication ... with unmatched biometric accuracy, making it the most proven ... platform uses video technology to deliver a fast and ...
(Date:4/28/2016)... India , April 28, 2016 ... Infosys (NYSE: INFY ), and Samsung SDS, a ... that will provide end customers with a more secure, ... services.      (Logo: http://photos.prnewswire.com/prnh/20130122/589162 ) , ... services, but it also plays a fundamental part in enabling ...
(Date:4/19/2016)... The new GEZE SecuLogic access ... "all-in-one" system solution for all door components. It can ... door interface with integration authorization management system, and thus ... minimal dimensions of the access control and the optimum ... offer considerable freedom of design with regard to the ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... 2016 Houston Methodist Willowbrook Hospital has ... Association to serve as their official health care ... Willowbrook will provide sponsorship support, athletic training services, ... coaches, volunteers, athletes and families. "We ... Association and to bring Houston Methodist quality services ...
(Date:6/23/2016)... , June, 23, 2016  The Biodesign Challenge ... envision new ways to harness living systems and biotechnology, ... Art (MoMA) in New York City ... 130 participating students, showcased projects at MoMA,s Celeste Bartos ... Paola Antonelli , MoMA,s senior curator of architecture and ...
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... STACS DNA ... Technical Leader at the Arkansas State Crime Laboratory, has joined STACS DNA as a ... STACS DNA team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In further ...
(Date:6/23/2016)... 2016  Blueprint Bio, a company dedicated to identifying, ... community, has closed its Series A funding round, according ... "We have received a commitment from Forentis Fund ... to meet our current goals," stated Matthew Nunez ... to complete validation on the current projects in our ...
Breaking Biology Technology: