Navigation Links
Why do infants get sick so often?
Date:8/7/2012

ANN ARBOR, Mich. Researchers at the University of Michigan Health System are helping to quell parents' worry about why infants seem to get sick so often.

It's been believed that, like walking and talking, fighting viral infections is something children will develop when they get older. But a U-M study suggests the natural ability to fight infection is there early on.

Scientists learned key cell signals inhibit the growth of essential immune cells early in life. Blocking this signaling could lead to improving an infant's response to infection, according to the study published online ahead of print in Nature Immunity.

"What happens at early age is that natural killer cells, like many other immune cells, do not complete their functional maturation until adulthood," says study senior author Yasmina Laouar, Ph.D., assistant professor in the U-M Department of Microbiology and Immunology.

"During this time we are left with an immature immune system that cannot protect us against infections, the reason why newborns and infants are more prone to infection," she says.

There is a large gap in understanding infant immunity, specifically why the natural killer cell responses are deficient. The study by immunologists at the U-M demonstrates the role of a cell called transforming growth factor beta that can explain why.

The study showed the production of natural killer cells is controlled by TGF-β, which is produced in the bone marrow. In infant mice, the maturation of natural killer cells progressed faster in the absence of TGF-β signaling.

By adulthood, mice had 10 times more mature natural killer cells if TGF-β signaling was blocked.

"Our overall goal was to determine the factors that constraint the production and maturation of natural killer cells early in life," says Laouar. "To our surprise, we discovered that natural killer cells can complete maturation as early as 10 days of age if TGF-β signaling is blocked."

Authors say it's tempting to propose the functional inactivation TGF-β signaling as a strategy to reverse the deficit of natural killer cells early in life. Additional testing will be required.


'/>"/>
Contact: Shantell M. Kirkendoll
smkirk@umich.edu
734-764-2220
University of Michigan Health System
Source:Eurekalert

Related medicine news :

1. Depressed moms behavior may play role in infants sleep problems
2. Research shows efficacy of treatment model developed at Women & Infants
3. Low-Income Mothers May Overfeed Their Infants
4. Gut flora affects maturation of B cells in infants
5. Phthalates in PVC floors taken up by the body in infants
6. Disease that stunts infants growth traced to same gene that makes kids grow too fast
7. Infants cant distinguish between large and small groups
8. Women & Infants to participate in national effort to increase breastfeeding rates
9. Keep Infants Out of Sun and Heat, Experts Warn
10. Hair samples from infants show exposure to anti-HIV drugs in the womb and during breast-feeding
11. Scientists ID New Gene Linked to Vision Loss in Infants
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... ... “America On The Brink”: the Christian history of the United States and ... of published author, William Nowers. Captain Nowers and his wife, Millie, have six ... years in the Navy. Following his career as a naval aviator and carrier ...
(Date:10/12/2017)... ... 12, 2017 , ... The company has developed a suite ... regulatory authorities worldwide. From Children’s to Adults 50+, every formula has been developed ... , These products are also: Gluten Free, Non-GMO, Vegan, Soy Free, Non-Dairy*, ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... system that we intend to develop to enable prevention of a major side ... severe hearing loss, especially in pediatric patients. For cisplatin, hearing loss is FDA ...
(Date:10/12/2017)... ... October 12, 2017 , ... On Saturday, October 21, the Health & Wellness ... Moonlight to raise money for the American Heart Association Heart Walk. Teams of up ... work together to keep their treadmills moving for 5 hours. Treadmills will start at ...
(Date:10/12/2017)... ... October 12, 2017 , ... Vohra ... care advancements to physician colleagues, skilled nursing facility medical directors and other clinicians ... Waters of Wound Care." , "At many of these conferences we get to ...
Breaking Medicine News(10 mins):
(Date:10/7/2017)... --  Provista, a proven leader in the supply ... power, today announced a new resource area on Provistaco.com ... is the online home for case studies, articles on ... releases, slideshows and events. ... at their fingertips, viewers can also watch short videos ...
(Date:10/2/2017)... Mich. , Oct. 2, 2017 Diplomat ... 8th Day Software and Consulting, LLC , and ... 8th Day Software, based in Tennessee ... LLC. 8th Day expands EnvoyHealth,s service offerings for health ... development. "In an ...
(Date:9/28/2017)... CHICAGO , Sept. 28, 2017 Hill-Rom ... quarter 2017 earnings conference call and webcast on Friday, ... 8:00 a.m. (EDT) and ending at approximately 8:30 a.m. ... to discussing the company,s 2017 financial performance and guidance ... growth opportunities, initiatives to enhance operational performance, and long-range ...
Breaking Medicine Technology: