Navigation Links
Immune cells halt round in space

An immune cell swallows a small capsule-shaped bacteria. The immune cells which help protect us from disease does not generally work the way they should in space travellers and it could be something to do with their shape. Researchers at NASA's Johnson Space Center (JSC) have been studying how immune cells behave in microgravity as part of their research on the health effects of space on astronauts.//

It has been found that astronauts have elevated virus levels their sneezes contain up to ten times more Epstein-Barr virus than normal Earth sneezes, for example. Looking at the key immune cells, researchers have found that B-cells, which produce antibodies to flag invading micro-organisms for destruction, and T-cells which actually physically attack them, have both been found to behave differently in space.

In space, T-cells do not multiply properly, neither move or signal each other as well and overall seem less able to destroy invaders. While one possibility is that the unique physical and psychological stresses of space flight might trigger immune-altering hormones, another possibility is that the weightlessness of space might be affecting the immune cells directly. To investigate this, NASA has developed a "rotating bioreactor" which allows researchers to investigate the possible effects of microgravity on individual immune cells without the complications of hormone effects.

The bioreactor consists of a rotating container full of a fluid which allows cells to remain suspended for months at a time in continual free fall, just as they would be in Earth orbit. According to Neal Pellis, chief of JSC's Biological systems Office, the cells in the bioreactor began to change in the first 15 minutes. One of the first changes was that T-cells were somehow forced to remain round and the researchers believe this could be responsible for the problems seen.

On Earth, T-cells can change their shape, protruding portions of themselves s o they can move around like amoebas. T-cells need to move in order to get to sites of infections, tumors and immune system organs. The changed shape could also make it harder for cells to communicate as their ability to interact is reduced by the rigid round shape. Researchers do not understand why the T-cells stay round in microgravity but suggest that intermolecular or submolecular forces such as hydrogen bonding might play a larger role in determining the cell's shape in the absence of Earth's gravity.

They say finding out is important to both astronauts and people on Earth since understanding the way physical forces affect T-cells could eventually enable scientists to control them. "There are times when we don't want them to invade - transplants, for example. And there are cases when we want them to act vigorously, like in tumors," said Pellis.


'"/>




Related medicine news :

1. Immune function could benefit from exercise
2. Reviving the Immune System
3. Wrestling found To Be Good for the Immune System
4. Immune Boost With LHRH To Help Cancer And Transplant Patients
5. Researchers Find Out The Cause Of Immune Attacks Behind Hearing Loss
6. Block Immune System Chemical For Treating Asthma
7. Immune Response Of Human Beings Can Be Re-energized
8. Weizmann Institute of Science says Immune Cells Could Help Maintain Brain Function
9. Antidepressant drugs interacts with Immune cells
10. Specific Immune Mechanism against DNA viruses
11. Immune response in Occupational metal fume inhaling workers
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/28/2017)... CA (PRWEB) , ... March 28, 2017 , ... Usually, ... from the daily wardrobe. However, for those self-conscious about a double chin, this means ... have the ideal solution. , “For most people, a double chin is undesirable,” ...
(Date:3/28/2017)... ... March 28, 2017 , ... ... has relocated its corporate headquarters to a new, more expansive office space in ... October 2016, Qualidigm purchased a distressed office building in Wethersfield, Conn. located at ...
(Date:3/28/2017)... ... March 28, 2017 , ... ... work, the Self-Funding Success website has recently developed and published an informational resource ... ” was created based on common inquiries the site’s team of third party ...
(Date:3/28/2017)... CA (PRWEB) , ... March 28, 2017 , ... ... which will be offered by the American Association of Integrative Medicine and available ... for healthcare providers at the AutismOne 2017 Conference in Colorado Springs. , Ed ...
(Date:3/28/2017)... , ... March 28, 2017 , ... With expansion and ... Georgia, in early March. , The seed processing plant opened in Marshallville in 2006, ... 2016. The new office allows opportunity for transition of Patten Seed operations to the ...
Breaking Medicine News(10 mins):
(Date:3/27/2017)... -- Summary This report provides all ... its partnering interests and activities since 2010. Description The ... insight into the partnering activity of one of the world,s ... are prepared upon purchase to ensure inclusion of the most ... report will be delivered in PDF format within 1 working ...
(Date:3/27/2017)... -- A recent study at Shriners Hospitals for Children – ... country dedicated to the treatment of pediatric burns and ... Surfacide Helios ® UV-C Disinfection System is ... not killed by the EVS (manual) cleaning process alone." ... Association,s 49th Annual Meeting in Boston ...
(Date:3/27/2017)... , March 27, 2017  Cryoport, Inc. (NASDAQ: CYRX, ... intends to offer shares of common stock in an ... on file with the Securities and Exchange Commission (the ... conditions, and there can be no assurance as to ... as to the actual size or terms of the ...
Breaking Medicine Technology: