Navigation Links
Immune cells cluster and communicate 'like bees,' researcher says
Date:3/13/2013

The immune system's T cells, while coordinating responses to diseases and vaccines, act like honey bees sharing information about the best honey sources, according to a new study by scientists at UC San Francisco.

"In the morning, each bee goes looking individually for a sugar source, then comes back to the hive and does a dance in front of the other bees describing the location of what it's found, which helps the hive decide collectively where the best source is," said senior scientist Matthew Krummel, PhD, a UCSF professor of pathology.

They don't bust the same moves as bees, but T cells gather together and communicate essential information to each other in a similar way, Krummel said, thereby helping to coordinate immune responses directed against invading pathogens. This discovery might lead to useful therapeutic interventions to fight disease, according to Krummel.

Results of the study were published online March 10 in Nature Immunology.

Krummel's lab team found that after individual T cells survey lymph nodes and sample foreign matter, such as vaccines, bacteria or viruses, they come together as a group during what he and his team call the "critical differentiation period." This occurs several hours to one day after exposure.

"They cluster together for the purpose of sharing information, transmitting what they've discovered about the new pathogen or vaccine, which in turn helps the immune system mount a coordinated response to the foreign matter," Krummel said.

The discovery is important, Krummel said, because it sheds light on an aspect of medicine that has long been obscure: how vaccines work. "We know that they are effective for years after a vaccination, but we don't know why. It seems that T-cell aggregation is a profound part of the reason."

Krummel's team found that the critical differentiation period is essential to the formation of what is known as a "memory pool," the mechanism by which the immune system recognizes a pathogen to which it had been exposed months or years previously.

"Without that long-term memory, vaccines would be useless," Krummel said. "The body wouldn't remember that it had been exposed to a particular pathogen, such as measles or diphtheria, and would not know how to successfully fight it off."

In experiments with a mouse model of human immune function, the scientists vaccinated mice for listeria, a common bacterium that causes food-borne illness, and then exposed the animals to the bacteria.

Mice in which the critical differentiation period was allowed to occur unimpeded remained healthy, protected from a potentially lethal infection. In mice in which T-cell differentiation was blocked, said Krummel, "it was as if the mice had never been vaccinated at all."

Krummel said the work also opens up new paths of research in immunology, which his laboratory is currently pursuing. "Now that we know that there is a nexus at which the cells are integrating their responses, we might be able to design cells that will join that nexus in order to get the cells to do things we want them to do push immune response in a particular direction, or enhance it overall," he said.

Conversely, Krummel speculated that in case of autoimmune disorders, such as diabetes or lupus, "it might be possible to attenuate the immune response by blocking the formation of a memory pool."

"You can't eliminate insulin, which is what much of the immune response is reacting to in diabetes," he said. "But if you can tweak the immune cells in the right way, then although each cell would be responding to insulin, they would not be reacting as a group and thus may not become effective at killing the insulin-producing cells. That would severely weaken the autoimmune effect."

Krummel cautioned that while the mouse model of human immune response is "robust and very well-grounded," research will ultimately have to take place in humans, "which will be years away. We'll have to see what happens."


'/>"/>

Contact: Jeffrey Norris
jeff.norris@ucsf.edu
415-502-6397
University of California - San Francisco
Source:Eurekalert  

Related biology news :

1. U of Alberta researcher steps closer to understand autoimmune diseases
2. UCI-led study uncovers how Salmonella avoids the bodys immune response
3. New insight into mechanisms behind autoimmune diseases suggests a potential therapy
4. Immune system implicated in prematurity complication
5. Key to immune system disease could lie inside the cheek
6. New immune defense enzyme discovered
7. New genetic mechanism of immune deficiency discovered
8. Carnegie Mellon fluorescent biosensor reveals mechanism critical to immune system amplification
9. Immune-response genes affecting breast tumor eradication
10. New screening technique yields elusive compounds to block immune-regulating enzyme
11. Breast-fed babies gut microbes contribute to healthy immune systems
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Immune cells cluster and communicate 'like bees,' researcher says
(Date:2/2/2016)... , Feb. 2, 2016   Parabon ... from the U.S. Army Research Office and the ... range and sensitivity of the company,s Snapshot ... Accounting Mission and, more generally, defense-related DNA forensics. ... phenotyping capabilities (predicting appearance and ancestry from DNA ...
(Date:2/1/2016)... Canada , February 1, 2016 ... technological advancements to drive global touchfree intuitive gesture control ... --> Rising sales of consumer electronics coupled ... gesture control market size through ... consumer electronics coupled with new technological advancements to drive ...
(Date:2/1/2016)... , Feb. 1, 2016  Wocket® smart wallet ( www.wocketwallet.com ) ... television personality, Joey Fatone . Las Vegas ... fans. --> Las Vegas , where Joey ... --> The new video ad was filmed at the Consumer Electronics ... at the Wocket booth to meet and greet fans. ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... ... February 09, 2016 , ... Creation Technologies, leading global provider ... Overall Customer Rating Award from Circuits Assembly , today announced its milestone achievement ... Canada, Mexico and China. , The EMS provider, known in the EMS industry ...
(Date:2/9/2016)... ... February 08, 2016 , ... Date and time: March 1, ... the Pennsylvania Biotechnology Center of Bucks County, 3805 Old Easton Road, Doylestown, PA ... will hold an open house for participants to learn about a new Master ...
(Date:2/9/2016)... ... February 09, 2016 , ... Tunnell Consulting, Inc. announced that Frédéric ... he will focus on acquiring new accounts and work closely with existing Tunnell clients ... “Fred brings to our European clients more than 15 years of experience in the ...
(Date:2/9/2016)... ... 2016 , ... PharmApprove announced today the hiring ... for Rare Disorders (NORD). Dorman will lead PharmApprove efforts to work with patients, ... drug regulatory review process. , “Adding Diane Dorman is just the latest in ...
Breaking Biology Technology: